import Foundation
import Testing
@testable import ForgejoKit

struct ModelDecodingTests {

    private func decoder() -> JSONDecoder {
        let d = JSONDecoder()
        d.dateDecodingStrategy = forgejoDateDecodingStrategy
        return d
    }

    // MARK: - User

    @Test func decodesUser() throws {
        let json = """
        {
            "id": 1,
            "login": "admin",
            "full_name": "Admin User",
            "email": "admin@example.com",
            "avatar_url": "https://example.com/avatar.png",
            "is_admin": true,
            "created": "2024-01-01T00:00:00Z"
        }
        """
        let user = try decoder().decode(User.self, from: Data(json.utf8))
        #expect(user.id == 1)
        #expect(user.login == "admin")
        #expect(user.fullName == "Admin User")
        #expect(user.email == "admin@example.com")
        #expect(user.isAdmin == true)
    }

    @Test func decodesUserWithMinimalFields() throws {
        let json = """
        {
            "id": 2,
            "login": "bot"
        }
        """
        let user = try decoder().decode(User.self, from: Data(json.utf8))
        #expect(user.id == 2)
        #expect(user.login == "bot")
        #expect(user.fullName == nil)
        #expect(user.email == nil)
    }

    // MARK: - IssueLabel

    @Test func decodesIssueLabel() throws {
        let json = """
        {
            "id": 10,
            "name": "bug",
            "color": "ee0701",
            "description": "Something is broken"
        }
        """
        let label = try decoder().decode(IssueLabel.self, from: Data(json.utf8))
        #expect(label.id == 10)
        #expect(label.name == "bug")
        #expect(label.color == "ee0701")
    }

    // MARK: - IssueComment

    @Test func decodesIssueComment() throws {
        let json = """
        {
            "id": 100,
            "body": "Looks good!",
            "user": {"id": 1, "login": "reviewer"},
            "created_at": "2024-05-01T12:00:00Z",
            "updated_at": "2024-05-01T12:00:00Z"
        }
        """
        let comment = try decoder().decode(IssueComment.self, from: Data(json.utf8))
        #expect(comment.id == 100)
        #expect(comment.body == "Looks good!")
        #expect(comment.user.login == "reviewer")
    }

    // MARK: - Issue

    @Test func decodesIssue() throws {
        let json = """
        {
            "id": 50,
            "number": 7,
            "title": "Fix login bug",
            "body": "The login button does not work",
            "state": "open",
            "user": {"id": 1, "login": "reporter"},
            "labels": [{"id": 1, "name": "bug", "color": "ff0000"}],
            "assignees": [],
            "created_at": "2024-02-01T09:00:00Z",
            "updated_at": "2024-02-02T10:00:00Z",
            "comments": 3
        }
        """
        let issue = try decoder().decode(Issue.self, from: Data(json.utf8))
        #expect(issue.number == 7)
        #expect(issue.title == "Fix login bug")
        #expect(issue.state == "open")
        #expect(issue.labels.count == 1)
        #expect(issue.comments == 3)
        #expect(issue.repository == nil)
    }

    @Test func decodesIssueWithMilestoneAndAssignees() throws {
        let json = """
        {
            "id": 56,
            "number": 13,
            "title": "Issue with metadata",
            "body": "Has milestone and assignees",
            "state": "open",
            "user": {"id": 1, "login": "reporter"},
            "labels": [{"id": 1, "name": "bug", "color": "ff0000"}],
            "milestone": {
                "id": 5,
                "title": "v1.0",
                "description": "First release",
                "state": "open",
                "due_on": "2026-03-01T00:00:00Z"
            },
            "assignees": [
                {"id": 2, "login": "dev1", "full_name": "Developer One"},
                {"id": 3, "login": "dev2"}
            ],
            "created_at": "2024-02-01T09:00:00Z",
            "updated_at": "2024-02-02T10:00:00Z",
            "comments": 0
        }
        """
        let issue = try decoder().decode(Issue.self, from: Data(json.utf8))
        #expect(issue.number == 13)
        #expect(issue.labels.count == 1)
        #expect(issue.milestone?.id == 5)
        #expect(issue.milestone?.title == "v1.0")
        #expect(issue.milestone?.description == "First release")
        #expect(issue.milestone?.state == "open")
        #expect(issue.milestone?.dueOn != nil)
        #expect(issue.assignees?.count == 2)
        #expect(issue.assignees?[0].login == "dev1")
        #expect(issue.assignees?[0].fullName == "Developer One")
        #expect(issue.assignees?[1].login == "dev2")
    }

    @Test func decodesIssueWithNilMilestoneAndEmptyAssignees() throws {
        let json = """
        {
            "id": 57,
            "number": 14,
            "title": "Issue without metadata",
            "state": "open",
            "user": {"id": 1, "login": "reporter"},
            "labels": [],
            "milestone": null,
            "assignees": [],
            "created_at": "2024-02-01T09:00:00Z",
            "updated_at": "2024-02-02T10:00:00Z",
            "comments": 0
        }
        """
        let issue = try decoder().decode(Issue.self, from: Data(json.utf8))
        #expect(issue.milestone == nil)
        #expect(issue.assignees?.isEmpty == true)
    }

    @Test func decodesIssueMilestone() throws {
        let json = """
        {
            "id": 1,
            "title": "v2.0",
            "description": "Second major release",
            "state": "open",
            "due_on": "2026-06-15T00:00:00Z",
            "closed_at": null
        }
        """
        let milestone = try decoder().decode(IssueMilestone.self, from: Data(json.utf8))
        #expect(milestone.id == 1)
        #expect(milestone.title == "v2.0")
        #expect(milestone.description == "Second major release")
        #expect(milestone.state == "open")
        #expect(milestone.dueOn != nil)
        #expect(milestone.closedAt == nil)
    }

    @Test func decodesIssueMilestoneWithMinimalFields() throws {
        let json = """
        {
            "id": 2,
            "title": "Backlog",
            "state": "open"
        }
        """
        let milestone = try decoder().decode(IssueMilestone.self, from: Data(json.utf8))
        #expect(milestone.id == 2)
        #expect(milestone.title == "Backlog")
        #expect(milestone.description == nil)
        #expect(milestone.dueOn == nil)
        #expect(milestone.closedAt == nil)
    }

    @Test func decodesIssueWithMinimalRepository() throws {
        let json = """
        {
            "id": 52,
            "number": 9,
            "title": "Search result issue",
            "state": "open",
            "user": {"id": 1, "login": "reporter"},
            "labels": [],
            "created_at": "2024-02-01T09:00:00Z",
            "updated_at": "2024-02-02T10:00:00Z",
            "comments": 1,
            "repository": {
                "id": 10,
                "name": "backend",
                "full_name": "org/backend"
            }
        }
        """
        let issue = try decoder().decode(Issue.self, from: Data(json.utf8))
        #expect(issue.number == 9)
        #expect(issue.repository?.id == 10)
        #expect(issue.repository?.fullName == "org/backend")
        #expect(issue.repository?.name == "backend")
        #expect(issue.repository?.empty == nil)
        #expect(issue.repository?.starsCount == nil)
        #expect(issue.repository?.defaultBranch == nil)
    }

    @Test func decodesIssueWithRepository() throws {
        let json = """
        {
            "id": 51,
            "number": 8,
            "title": "Add dark mode",
            "state": "open",
            "user": {"id": 1, "login": "reporter"},
            "labels": [],
            "created_at": "2024-02-01T09:00:00Z",
            "updated_at": "2024-02-02T10:00:00Z",
            "comments": 0,
            "repository": {
                "id": 1,
                "name": "my-repo",
                "full_name": "user/my-repo",
                "empty": false,
                "private": false,
                "fork": false,
                "mirror": false,
                "size": 1024,
                "html_url": "https://forgejo.example.com/user/my-repo",
                "ssh_url": "git@forgejo.example.com:user/my-repo.git",
                "clone_url": "https://forgejo.example.com/user/my-repo.git",
                "stars_count": 5,
                "forks_count": 2,
                "watchers_count": 3,
                "open_issues_count": 1,
                "open_pr_counter": 0,
                "release_counter": 1,
                "default_branch": "main",
                "archived": false,
                "created_at": "2024-01-01T00:00:00Z",
                "updated_at": "2024-06-01T00:00:00Z",
                "has_issues": true,
                "has_wiki": false,
                "has_pull_requests": true,
                "has_projects": false,
                "has_releases": true,
                "has_packages": false,
                "has_actions": false,
                "template": false
            }
        }
        """
        let issue = try decoder().decode(Issue.self, from: Data(json.utf8))
        #expect(issue.number == 8)
        #expect(issue.title == "Add dark mode")
        #expect(issue.repository?.fullName == "user/my-repo")
    }

    @Test func decodesIssueWithMergedPullRequestField() throws {
        let json = """
        {
            "id": 53,
            "number": 10,
            "title": "Add dark mode support",
            "state": "closed",
            "user": {"id": 1, "login": "dev"},
            "labels": [],
            "created_at": "2024-03-01T09:00:00Z",
            "updated_at": "2024-03-05T10:00:00Z",
            "comments": 2,
            "pull_request": {
                "merged": true,
                "merged_at": "2024-03-05T10:00:00Z"
            },
            "repository": {
                "id": 10,
                "name": "app",
                "full_name": "org/app"
            }
        }
        """
        let issue = try decoder().decode(Issue.self, from: Data(json.utf8))
        #expect(issue.number == 10)
        #expect(issue.state == "closed")
        #expect(issue.pullRequest?.merged == true)
        #expect(issue.pullRequest?.mergedAt != nil)
        #expect(issue.repository?.fullName == "org/app")
    }

    @Test func decodesIssueWithOpenPullRequestField() throws {
        let json = """
        {
            "id": 54,
            "number": 11,
            "title": "WIP: refactor auth",
            "state": "open",
            "user": {"id": 2, "login": "contributor"},
            "labels": [{"id": 1, "name": "WIP", "color": "fbca04"}],
            "created_at": "2024-04-01T09:00:00Z",
            "updated_at": "2024-04-02T10:00:00Z",
            "comments": 0,
            "pull_request": {
                "merged": false
            },
            "repository": {
                "id": 10,
                "name": "app",
                "full_name": "org/app"
            }
        }
        """
        let issue = try decoder().decode(Issue.self, from: Data(json.utf8))
        #expect(issue.number == 11)
        #expect(issue.state == "open")
        #expect(issue.pullRequest?.merged == false)
        #expect(issue.pullRequest?.mergedAt == nil)
        #expect(issue.labels.count == 1)
        #expect(issue.comments == 0)
    }

    @Test func decodesIssueWithMinimalPullRequestField() throws {
        let json = """
        {
            "id": 55,
            "number": 12,
            "title": "Quick fix",
            "state": "closed",
            "user": {"id": 1, "login": "dev"},
            "labels": [],
            "created_at": "2024-04-10T09:00:00Z",
            "updated_at": "2024-04-10T10:00:00Z",
            "comments": 1,
            "pull_request": {}
        }
        """
        let issue = try decoder().decode(Issue.self, from: Data(json.utf8))
        #expect(issue.number == 12)
        #expect(issue.pullRequest != nil)
        #expect(issue.pullRequest?.merged == nil)
        #expect(issue.pullRequest?.mergedAt == nil)
        #expect(issue.repository == nil)
    }

    // MARK: - PullRequest

    @Test func decodesPullRequest() throws {
        let json = """
        {
            "id": 200,
            "number": 42,
            "title": "Add feature X",
            "body": "Implements feature X",
            "state": "open",
            "user": {"id": 1, "login": "dev"},
            "labels": [],
            "head": {
                "label": "dev:feature-x",
                "ref": "feature-x",
                "sha": "abc123"
            },
            "base": {
                "label": "dev:main",
                "ref": "main",
                "sha": "def456"
            },
            "mergeable": true,
            "merged": false,
            "draft": false,
            "comments": 1,
            "created_at": "2024-03-01T08:00:00Z",
            "updated_at": "2024-03-02T09:00:00Z"
        }
        """
        let pr = try decoder().decode(PullRequest.self, from: Data(json.utf8))
        #expect(pr.number == 42)
        #expect(pr.title == "Add feature X")
        #expect(pr.head.ref == "feature-x")
        #expect(pr.base.ref == "main")
        #expect(pr.mergeable == true)
        #expect(pr.merged == false)
        #expect(pr.draft == false)
    }

    @Test func decodesPullRequestWithFullMetadata() throws {
        let json = """
        {
            "id": 204,
            "number": 46,
            "title": "PR with full metadata",
            "body": "Has labels, milestone, assignees, and reviewers",
            "state": "open",
            "user": {"id": 1, "login": "dev"},
            "labels": [
                {"id": 1, "name": "enhancement", "color": "0075ca"},
                {"id": 2, "name": "review-needed", "color": "e4e669"}
            ],
            "milestone": {
                "id": 3,
                "title": "v1.0",
                "description": "First release",
                "state": "open",
                "due_on": "2026-03-01T00:00:00Z"
            },
            "assignees": [
                {"id": 2, "login": "assignee1", "full_name": "Assignee One"},
                {"id": 3, "login": "assignee2"}
            ],
            "requested_reviewers": [
                {"id": 4, "login": "reviewer1"}
            ],
            "head": {"label": "dev:feature", "ref": "feature", "sha": "aaa"},
            "base": {"label": "dev:main", "ref": "main", "sha": "bbb"},
            "mergeable": true,
            "merged": false,
            "draft": false,
            "comments": 0,
            "created_at": "2024-03-01T08:00:00Z",
            "updated_at": "2024-03-02T09:00:00Z"
        }
        """
        let pr = try decoder().decode(PullRequest.self, from: Data(json.utf8))
        #expect(pr.number == 46)
        #expect(pr.labels.count == 2)
        #expect(pr.labels[0].name == "enhancement")
        #expect(pr.milestone?.id == 3)
        #expect(pr.milestone?.title == "v1.0")
        #expect(pr.milestone?.dueOn != nil)
        #expect(pr.assignees?.count == 2)
        #expect(pr.assignees?[0].login == "assignee1")
        #expect(pr.assignees?[0].fullName == "Assignee One")
        #expect(pr.requestedReviewers?.count == 1)
        #expect(pr.requestedReviewers?[0].login == "reviewer1")
    }

    @Test func decodesPullRequestWithRequestedReviewers() throws {
        let json = """
        {
            "id": 202,
            "number": 44,
            "title": "PR with reviewers",
            "state": "open",
            "user": {"id": 1, "login": "dev"},
            "labels": [],
            "head": {"label": "dev:feature", "ref": "feature", "sha": "aaa"},
            "base": {"label": "dev:main", "ref": "main", "sha": "bbb"},
            "mergeable": true,
            "merged": false,
            "draft": false,
            "comments": 0,
            "created_at": "2024-03-01T08:00:00Z",
            "updated_at": "2024-03-02T09:00:00Z",
            "requested_reviewers": [
                {"id": 10, "login": "reviewer1"},
                {"id": 11, "login": "reviewer2", "full_name": "Reviewer Two"}
            ]
        }
        """
        let pr = try decoder().decode(PullRequest.self, from: Data(json.utf8))
        #expect(pr.number == 44)
        #expect(pr.requestedReviewers?.count == 2)
        #expect(pr.requestedReviewers?[0].login == "reviewer1")
        #expect(pr.requestedReviewers?[1].fullName == "Reviewer Two")
    }

    @Test func decodesPullRequestWithoutRequestedReviewers() throws {
        let json = """
        {
            "id": 203,
            "number": 45,
            "title": "PR without reviewers",
            "state": "open",
            "user": {"id": 1, "login": "dev"},
            "labels": [],
            "head": {"label": "dev:fix", "ref": "fix", "sha": "ccc"},
            "base": {"label": "dev:main", "ref": "main", "sha": "ddd"},
            "comments": 0,
            "created_at": "2024-03-01T08:00:00Z",
            "updated_at": "2024-03-02T09:00:00Z"
        }
        """
        let pr = try decoder().decode(PullRequest.self, from: Data(json.utf8))
        #expect(pr.number == 45)
        #expect(pr.requestedReviewers == nil)
    }

    @Test func decodesMergedPullRequest() throws {
        let json = """
        {
            "id": 201,
            "number": 43,
            "title": "Merged PR",
            "state": "closed",
            "user": {"id": 1, "login": "dev"},
            "labels": [],
            "head": {"label": "dev:feat", "ref": "feat", "sha": "aaa"},
            "base": {"label": "dev:main", "ref": "main", "sha": "bbb"},
            "merged": true,
            "merged_by": {"id": 2, "login": "maintainer"},
            "merged_at": "2024-04-01T12:00:00Z",
            "comments": 0,
            "created_at": "2024-03-01T08:00:00Z",
            "updated_at": "2024-04-01T12:00:00Z"
        }
        """
        let pr = try decoder().decode(PullRequest.self, from: Data(json.utf8))
        #expect(pr.merged == true)
        #expect(pr.mergedBy?.login == "maintainer")
        #expect(pr.mergedAt != nil)
    }

    // MARK: - PullRequestReview

    @Test func decodesPullRequestReview() throws {
        let json = """
        {
            "id": 300,
            "body": "Approved with minor comments",
            "user": {"id": 5, "login": "reviewer"},
            "state": "APPROVED",
            "comments_count": 2,
            "submitted_at": "2024-04-10T15:00:00Z",
            "updated_at": "2024-04-10T15:00:00Z",
            "commit_id": "abc123",
            "stale": false,
            "official": true,
            "dismissed": false
        }
        """
        let review = try decoder().decode(PullRequestReview.self, from: Data(json.utf8))
        #expect(review.id == 300)
        #expect(review.state == "APPROVED")
        #expect(review.user?.login == "reviewer")
        #expect(review.commentsCount == 2)
        #expect(review.official == true)
    }

    @Test func decodesReviewWithNullableFields() throws {
        let json = """
        {
            "id": 301,
            "state": "COMMENT"
        }
        """
        let review = try decoder().decode(PullRequestReview.self, from: Data(json.utf8))
        #expect(review.id == 301)
        #expect(review.body == nil)
        #expect(review.user == nil)
        #expect(review.commentsCount == nil)
    }

    // MARK: - ReviewComment

    @Test func decodesReviewComment() throws {
        let json = """
        {
            "id": 400,
            "body": "This line needs a guard clause",
            "user": {"id": 5, "login": "reviewer"},
            "path": "Sources/main.swift",
            "diff_hunk": "@@ -10,5 +10,7 @@",
            "position": 15,
            "original_position": 10,
            "created_at": "2024-04-10T15:30:00Z",
            "updated_at": "2024-04-10T15:30:00Z"
        }
        """
        let comment = try decoder().decode(ReviewComment.self, from: Data(json.utf8))
        #expect(comment.id == 400)
        #expect(comment.path == "Sources/main.swift")
        #expect(comment.position == 15)
        #expect(comment.originalPosition == 10)
    }

    // MARK: - CreateReviewComment encoding

    @Test func encodesCreateReviewComment() throws {
        let comment = CreateReviewComment(
            body: "Fix this",
            path: "file.swift",
            oldPosition: 5,
            newPosition: 7
        )
        let data = try JSONEncoder().encode(comment)
        let dict = try JSONSerialization.jsonObject(with: data) as! [String: Any]
        #expect(dict["body"] as? String == "Fix this")
        #expect(dict["path"] as? String == "file.swift")
        #expect(dict["old_position"] as? Int == 5)
        #expect(dict["new_position"] as? Int == 7)
    }

    @Test func encodesCreateReviewCommentWithNilPositions() throws {
        let comment = CreateReviewComment(
            body: "Note",
            path: "readme.md",
            oldPosition: nil,
            newPosition: nil
        )
        let data = try JSONEncoder().encode(comment)
        let dict = try JSONSerialization.jsonObject(with: data) as! [String: Any]
        #expect(dict["old_position"] == nil)
        #expect(dict["new_position"] == nil)
    }

    // MARK: - Repository

    @Test func decodesRepository() throws {
        let json = """
        {
            "id": 1,
            "name": "my-repo",
            "full_name": "user/my-repo",
            "empty": false,
            "private": false,
            "fork": false,
            "mirror": false,
            "size": 1024,
            "html_url": "https://forgejo.example.com/user/my-repo",
            "ssh_url": "git@forgejo.example.com:user/my-repo.git",
            "clone_url": "https://forgejo.example.com/user/my-repo.git",
            "stars_count": 5,
            "forks_count": 2,
            "watchers_count": 3,
            "open_issues_count": 1,
            "open_pr_counter": 0,
            "release_counter": 1,
            "default_branch": "main",
            "archived": false,
            "created_at": "2024-01-01T00:00:00Z",
            "updated_at": "2024-06-01T00:00:00Z",
            "has_issues": true,
            "has_wiki": false,
            "has_pull_requests": true,
            "has_projects": false,
            "has_releases": true,
            "has_packages": false,
            "has_actions": false,
            "template": false
        }
        """
        let repo = try decoder().decode(Repository.self, from: Data(json.utf8))
        #expect(repo.name == "my-repo")
        #expect(repo.fullName == "user/my-repo")
        #expect(repo.empty != nil)
        #expect(repo.starsCount != nil)
        #expect(repo.starsCount == 5)
        #expect(repo.defaultBranch == "main")
        #expect(repo.hasPullRequests == true)
        #expect(repo.createdAt != nil)
        #expect(repo.updatedAt != nil)
    }

    @Test func decodesRepositoryWithMinimalFields() throws {
        let json = """
        {
            "id": 10,
            "name": "backend",
            "full_name": "org/backend"
        }
        """
        let repo = try decoder().decode(Repository.self, from: Data(json.utf8))
        #expect(repo.id == 10)
        #expect(repo.name == "backend")
        #expect(repo.fullName == "org/backend")
        #expect(repo.empty == nil)
        #expect(repo.private == nil)
        #expect(repo.fork == nil)
        #expect(repo.mirror == nil)
        #expect(repo.size == nil)
        #expect(repo.htmlUrl == nil)
        #expect(repo.sshUrl == nil)
        #expect(repo.cloneUrl == nil)
        #expect(repo.starsCount == nil)
        #expect(repo.forksCount == nil)
        #expect(repo.watchersCount == nil)
        #expect(repo.openIssuesCount == nil)
        #expect(repo.defaultBranch == nil)
        #expect(repo.archived == nil)
        #expect(repo.createdAt == nil)
        #expect(repo.updatedAt == nil)
        #expect(repo.hasIssues == nil)
        #expect(repo.hasPullRequests == nil)
        #expect(repo.hasReleases == nil)
        #expect(repo.hasPackages == nil)
        #expect(repo.hasActions == nil)
        #expect(repo.template == nil)
    }

    @Test func decodesRepositoryWithPartialFields() throws {
        let json = """
        {
            "id": 11,
            "name": "frontend",
            "full_name": "org/frontend",
            "private": true,
            "html_url": "https://forgejo.example.com/org/frontend",
            "stars_count": 12,
            "default_branch": "develop"
        }
        """
        let repo = try decoder().decode(Repository.self, from: Data(json.utf8))
        #expect(repo.id == 11)
        #expect(repo.fullName == "org/frontend")
        #expect(repo.private == true)
        #expect(repo.htmlUrl == "https://forgejo.example.com/org/frontend")
        #expect(repo.starsCount == 12)
        #expect(repo.defaultBranch == "develop")
        #expect(repo.empty == nil)
        #expect(repo.forksCount == nil)
    }

    // MARK: - NotificationThread

    @Test func decodesNotificationThread() throws {
        let json = """
        {
            "id": 1,
            "unread": true,
            "pinned": false,
            "updated_at": "2024-06-15T14:30:00Z",
            "url": "https://forgejo.example.com/api/v1/notifications/threads/1",
            "subject": {
                "type": "Issue",
                "title": "Fix login bug",
                "url": "https://forgejo.example.com/api/v1/repos/org/app/issues/42",
                "html_url": "https://forgejo.example.com/org/app/issues/42",
                "state": "open",
                "latest_comment_url": "https://forgejo.example.com/api/v1/repos/org/app/issues/comments/100",
                "latest_comment_html_url": "https://forgejo.example.com/org/app/issues/42#issuecomment-100"
            },
            "repository": {
                "id": 10,
                "name": "app",
                "full_name": "org/app"
            }
        }
        """
        let notification = try decoder().decode(NotificationThread.self, from: Data(json.utf8))
        #expect(notification.id == 1)
        #expect(notification.unread == true)
        #expect(notification.pinned == false)
        #expect(notification.subject.type == "Issue")
        #expect(notification.subject.title == "Fix login bug")
        #expect(notification.subject.state == "open")
        #expect(notification.subject.htmlUrl == "https://forgejo.example.com/org/app/issues/42")
        #expect(notification.subject.latestCommentUrl != nil)
        #expect(notification.subject.latestCommentHtmlUrl != nil)
        #expect(notification.repository.fullName == "org/app")
    }

    @Test func decodesNotificationSubjectTypes() throws {
        let issueJson = """
        {
            "id": 2,
            "unread": true,
            "pinned": false,
            "updated_at": "2024-06-15T14:30:00Z",
            "subject": {
                "type": "Issue",
                "title": "Bug report",
                "state": "open"
            },
            "repository": {"id": 1, "name": "repo", "full_name": "user/repo"}
        }
        """
        let pullJson = """
        {
            "id": 3,
            "unread": false,
            "pinned": false,
            "updated_at": "2024-06-15T15:00:00Z",
            "subject": {
                "type": "Pull",
                "title": "Add feature",
                "state": "closed"
            },
            "repository": {"id": 1, "name": "repo", "full_name": "user/repo"}
        }
        """
        let commitJson = """
        {
            "id": 4,
            "unread": true,
            "pinned": false,
            "updated_at": "2024-06-15T16:00:00Z",
            "subject": {
                "type": "Commit",
                "title": "abc123"
            },
            "repository": {"id": 1, "name": "repo", "full_name": "user/repo"}
        }
        """

        let issue = try decoder().decode(NotificationThread.self, from: Data(issueJson.utf8))
        #expect(issue.subject.type == "Issue")
        #expect(issue.subject.state == "open")

        let pull = try decoder().decode(NotificationThread.self, from: Data(pullJson.utf8))
        #expect(pull.subject.type == "Pull")
        #expect(pull.subject.state == "closed")
        #expect(pull.unread == false)

        let commit = try decoder().decode(NotificationThread.self, from: Data(commitJson.utf8))
        #expect(commit.subject.type == "Commit")
        #expect(commit.subject.state == nil)
    }

    @Test func decodesNotificationCount() throws {
        let json = """
        {"new": 5}
        """
        let count = try decoder().decode(NotificationCount.self, from: Data(json.utf8))
        #expect(count.new == 5)
    }

    @Test func decodesNotificationWithMinimalFields() throws {
        let json = """
        {
            "id": 10,
            "unread": false,
            "pinned": false,
            "updated_at": "2024-06-15T14:30:00Z",
            "subject": {
                "type": "Repository",
                "title": "New release"
            },
            "repository": {"id": 5, "name": "lib", "full_name": "org/lib"}
        }
        """
        let notification = try decoder().decode(NotificationThread.self, from: Data(json.utf8))
        #expect(notification.id == 10)
        #expect(notification.unread == false)
        #expect(notification.url == nil)
        #expect(notification.subject.url == nil)
        #expect(notification.subject.htmlUrl == nil)
        #expect(notification.subject.state == nil)
        #expect(notification.subject.latestCommentUrl == nil)
        #expect(notification.subject.latestCommentHtmlUrl == nil)
    }

    // MARK: - Commit

    @Test func decodesCommit() throws {
        let json = """
        {
            "sha": "abc123def456",
            "url": "https://forgejo.example.com/api/v1/repos/user/repo/git/commits/abc123def456",
            "html_url": "https://forgejo.example.com/user/repo/commit/abc123def456",
            "commit": {
                "url": "https://forgejo.example.com/api/v1/repos/user/repo/git/commits/abc123def456",
                "message": "Add new feature\\n\\nDetailed description of the change.",
                "author": {
                    "name": "Test User",
                    "email": "test@example.com",
                    "date": "2024-06-01T10:30:00Z"
                },
                "committer": {
                    "name": "Test User",
                    "email": "test@example.com",
                    "date": "2024-06-01T10:30:00Z"
                }
            },
            "author": {"id": 1, "login": "testuser"},
            "committer": {"id": 1, "login": "testuser"},
            "parents": [
                {
                    "sha": "parent123",
                    "url": "https://forgejo.example.com/api/v1/repos/user/repo/git/commits/parent123",
                    "html_url": "https://forgejo.example.com/user/repo/commit/parent123"
                }
            ]
        }
        """
        let commit = try decoder().decode(Commit.self, from: Data(json.utf8))
        #expect(commit.sha == "abc123def456")
        #expect(commit.htmlUrl == "https://forgejo.example.com/user/repo/commit/abc123def456")
        #expect(commit.commit.message == "Add new feature\n\nDetailed description of the change.")
        #expect(commit.commit.author?.name == "Test User")
        #expect(commit.commit.author?.email == "test@example.com")
        #expect(commit.commit.author?.date != nil)
        #expect(commit.commit.committer?.name == "Test User")
        #expect(commit.author?.login == "testuser")
        #expect(commit.committer?.login == "testuser")
        #expect(commit.parents?.count == 1)
        #expect(commit.parents?[0].sha == "parent123")
        #expect(commit.id == "abc123def456")
    }

    @Test func decodesCommitWithMinimalFields() throws {
        let json = """
        {
            "sha": "minimal123",
            "commit": {
                "message": "Quick fix"
            }
        }
        """
        let commit = try decoder().decode(Commit.self, from: Data(json.utf8))
        #expect(commit.sha == "minimal123")
        #expect(commit.commit.message == "Quick fix")
        #expect(commit.commit.author == nil)
        #expect(commit.commit.committer == nil)
        #expect(commit.author == nil)
        #expect(commit.committer == nil)
        #expect(commit.parents == nil)
        #expect(commit.htmlUrl == nil)
        #expect(commit.url == nil)
    }

    @Test func decodesCommitWithNullAuthor() throws {
        let json = """
        {
            "sha": "noauthor456",
            "commit": {
                "message": "Automated commit",
                "author": {
                    "name": "bot",
                    "email": "bot@noreply.example.com",
                    "date": "2024-07-15T08:00:00Z"
                }
            },
            "author": null,
            "committer": null,
            "parents": []
        }
        """
        let commit = try decoder().decode(Commit.self, from: Data(json.utf8))
        #expect(commit.sha == "noauthor456")
        #expect(commit.commit.author?.name == "bot")
        #expect(commit.author == nil)
        #expect(commit.committer == nil)
        #expect(commit.parents?.isEmpty == true)
    }

    @Test func decodesCommitList() throws {
        let json = """
        [
            {
                "sha": "first111",
                "commit": {"message": "First commit"},
                "parents": []
            },
            {
                "sha": "second222",
                "commit": {"message": "Second commit"},
                "parents": [{"sha": "first111"}]
            }
        ]
        """
        let commits = try decoder().decode([Commit].self, from: Data(json.utf8))
        #expect(commits.count == 2)
        #expect(commits[0].sha == "first111")
        #expect(commits[1].sha == "second222")
        #expect(commits[1].parents?[0].sha == "first111")
    }

    // MARK: - RepositoryContent

    @Test func decodesRepositoryContent() throws {
        let json = """
        {
            "name": "README.md",
            "path": "README.md",
            "sha": "abc123",
            "size": 256,
            "url": "https://example.com/api/v1/repos/u/r/contents/README.md",
            "html_url": "https://example.com/u/r/src/branch/main/README.md",
            "git_url": "https://example.com/api/v1/repos/u/r/git/blobs/abc123",
            "type": "file"
        }
        """
        let content = try decoder().decode(RepositoryContent.self, from: Data(json.utf8))
        #expect(content.name == "README.md")
        #expect(content.type == .file)
        #expect(content.id == "README.md")
    }

    @Test func decodesDirectoryContent() throws {
        let json = """
        {
            "name": "src",
            "path": "src",
            "sha": "def456",
            "size": 0,
            "url": "https://example.com/api",
            "html_url": "https://example.com/html",
            "git_url": "https://example.com/git",
            "type": "dir"
        }
        """
        let content = try decoder().decode(RepositoryContent.self, from: Data(json.utf8))
        #expect(content.type == .dir)
    }

    // MARK: - Branch

    @Test func decodesBranch() throws {
        let json = """
        {
            "name": "main",
            "commit": {
                "id": "abc123",
                "message": "Initial commit",
                "url": "https://example.com/commit/abc123"
            },
            "protected": true
        }
        """
        let branch = try decoder().decode(Branch.self, from: Data(json.utf8))
        #expect(branch.name == "main")
        #expect(branch.commit.message == "Initial commit")
        #expect(branch.protected == true)
        #expect(branch.id == "main")
    }

    // MARK: - Repository Equatable / Hashable

    @Test func repositoriesWithSameIdAreEqual() throws {
        let json1 = """
        {"id": 42, "name": "repo-a", "full_name": "owner/repo-a", "owner": {"id": 1, "login": "owner"}, "html_url": "https://example.com/owner/repo-a", "description": "", "empty": false, "private": false, "fork": false, "mirror": false, "archived": false, "stars_count": 0, "forks_count": 0, "open_issues_count": 0, "open_pr_counter": 0, "has_issues": true, "has_pull_requests": true, "default_branch": "main", "created_at": "2024-01-01T00:00:00Z", "updated_at": "2024-01-01T00:00:00Z"}
        """
        let json2 = """
        {"id": 42, "name": "repo-b", "full_name": "owner/repo-b", "owner": {"id": 1, "login": "owner"}, "html_url": "https://example.com/owner/repo-b", "description": "different", "empty": false, "private": false, "fork": false, "mirror": false, "archived": false, "stars_count": 5, "forks_count": 1, "open_issues_count": 3, "open_pr_counter": 0, "has_issues": true, "has_pull_requests": true, "default_branch": "main", "created_at": "2024-01-01T00:00:00Z", "updated_at": "2024-01-01T00:00:00Z"}
        """
        let repo1 = try decoder().decode(Repository.self, from: Data(json1.utf8))
        let repo2 = try decoder().decode(Repository.self, from: Data(json2.utf8))
        #expect(repo1 == repo2)
        #expect(repo1.hashValue == repo2.hashValue)
    }

    @Test func repositoriesWithDifferentIdsAreNotEqual() throws {
        let json1 = """
        {"id": 1, "name": "repo", "full_name": "owner/repo", "owner": {"id": 1, "login": "owner"}, "html_url": "https://example.com/owner/repo", "description": "", "empty": false, "private": false, "fork": false, "mirror": false, "archived": false, "stars_count": 0, "forks_count": 0, "open_issues_count": 0, "open_pr_counter": 0, "has_issues": true, "has_pull_requests": true, "default_branch": "main", "created_at": "2024-01-01T00:00:00Z", "updated_at": "2024-01-01T00:00:00Z"}
        """
        let json2 = """
        {"id": 2, "name": "repo", "full_name": "owner/repo", "owner": {"id": 1, "login": "owner"}, "html_url": "https://example.com/owner/repo", "description": "", "empty": false, "private": false, "fork": false, "mirror": false, "archived": false, "stars_count": 0, "forks_count": 0, "open_issues_count": 0, "open_pr_counter": 0, "has_issues": true, "has_pull_requests": true, "default_branch": "main", "created_at": "2024-01-01T00:00:00Z", "updated_at": "2024-01-01T00:00:00Z"}
        """
        let repo1 = try decoder().decode(Repository.self, from: Data(json1.utf8))
        let repo2 = try decoder().decode(Repository.self, from: Data(json2.utf8))
        #expect(repo1 != repo2)
    }

    // MARK: - RepositoryPermissions

    @Test func decodesRepositoryWithFullPermissions() throws {
        let json = """
        {
            "id": 20,
            "name": "collab-repo",
            "full_name": "org/collab-repo",
            "permissions": {
                "admin": true,
                "push": true,
                "pull": true
            }
        }
        """
        let repo = try decoder().decode(Repository.self, from: Data(json.utf8))
        #expect(repo.permissions?.admin == true)
        #expect(repo.permissions?.push == true)
        #expect(repo.permissions?.pull == true)
    }

    @Test func decodesRepositoryWithReadOnlyPermissions() throws {
        let json = """
        {
            "id": 21,
            "name": "public-repo",
            "full_name": "org/public-repo",
            "permissions": {
                "admin": false,
                "push": false,
                "pull": true
            }
        }
        """
        let repo = try decoder().decode(Repository.self, from: Data(json.utf8))
        #expect(repo.permissions?.admin == false)
        #expect(repo.permissions?.push == false)
        #expect(repo.permissions?.pull == true)
    }

    @Test func decodesRepositoryWithMissingPermissions() throws {
        let json = """
        {
            "id": 22,
            "name": "no-perms",
            "full_name": "org/no-perms"
        }
        """
        let repo = try decoder().decode(Repository.self, from: Data(json.utf8))
        #expect(repo.permissions == nil)
    }

    // MARK: - DecodingError description

    @Test func decodingErrorAtRootShowsRoot() {
        // Decoding a String where an object is expected produces a root-level error
        let json = #""not-an-object""#
        do {
            _ = try decoder().decode(User.self, from: Data(json.utf8))
            Issue.record("Expected decoding to fail")
        } catch let error as DecodingError {
            let description = describeDecodingError(error)
            #expect(description.contains("root"))
        } catch {
            Issue.record("Unexpected error type: \(error)")
        }
    }
}