@testable import ForgejoKit
import Foundation
import Testing

struct RepositoryServiceURLTests {
    /// Creates a client with dummy credentials for URL construction tests.
    private func makeClient() -> ForgejoClient {
        ForgejoClient(serverURL: "https://forgejo.example.com", username: "user", password: "pass")
    }

    // MARK: - fetchContents URL construction

    @Test func makeURLContentsWithoutRef() throws {
        let client = makeClient()
        let url = try client.makeURL(path: "/api/v1/repos/owner/repo/contents")
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/repos/owner/repo/contents")
    }

    @Test func makeURLContentsWithRef() throws {
        let client = makeClient()
        let queryItems = [URLQueryItem(name: "ref", value: "develop")]
        let url = try client.makeURL(path: "/api/v1/repos/owner/repo/contents", queryItems: queryItems)
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/repos/owner/repo/contents?ref=develop")
    }

    @Test func makeURLContentsWithRefAndSubpath() throws {
        let client = makeClient()
        let queryItems = [URLQueryItem(name: "ref", value: "feature/login")]
        let url = try client.makeURL(path: "/api/v1/repos/owner/repo/contents/src/main.py", queryItems: queryItems)
        #expect(url.query?.contains("ref=feature/login") == true)
        #expect(url.path == "/api/v1/repos/owner/repo/contents/src/main.py")
    }

    @Test func makeURLFileContentWithRef() throws {
        let client = makeClient()
        let queryItems = [URLQueryItem(name: "ref", value: "v1.0")]
        let url = try client.makeURL(path: "/api/v1/repos/owner/repo/contents/README.md", queryItems: queryItems)
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/repos/owner/repo/contents/README.md?ref=v1.0")
    }

    @Test func makeURLWithEmptyQueryItems() throws {
        let client = makeClient()
        let url = try client.makeURL(path: "/api/v1/repos/owner/repo/contents", queryItems: [])
        #expect(url.query == nil)
    }

    // MARK: - ref parameter nil-coalescence (same pattern used by fetchContents and fetchFileContent)

    @Test func optionalRefProducesEmptyQueryItems() {
        let ref: String? = nil
        let queryItems = ref.map { [URLQueryItem(name: "ref", value: $0)] } ?? []
        #expect(queryItems.isEmpty)
    }

    @Test func presentRefProducesQueryItem() {
        let ref: String? = "main"
        let queryItems = ref.map { [URLQueryItem(name: "ref", value: $0)] } ?? []
        #expect(queryItems.count == 1)
        #expect(queryItems.first?.name == "ref")
        #expect(queryItems.first?.value == "main")
    }

    // MARK: - createRepository URL

    @Test func createRepositoryURL() throws {
        let client = makeClient()
        let url = try client.makeURL(path: "/api/v1/user/repos")
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/user/repos")
    }

    // MARK: - editRepository URL

    @Test func editRepositoryURL() throws {
        let client = makeClient()
        let url = try client.makeRepoURL(owner: "owner", repo: "repo", path: "")
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/repos/owner/repo")
    }

    // MARK: - createLabel URL

    @Test func createLabelURL() throws {
        let client = makeClient()
        let url = try client.makeRepoURL(owner: "owner", repo: "repo", path: "/labels")
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/repos/owner/repo/labels")
    }

    // MARK: - createMilestone URL

    @Test func createMilestoneURL() throws {
        let client = makeClient()
        let url = try client.makeRepoURL(owner: "owner", repo: "repo", path: "/milestones")
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/repos/owner/repo/milestones")
    }

    // MARK: - addCollaborator URL

    @Test func addCollaboratorURL() throws {
        let client = makeClient()
        let encoded = ForgejoClient.encodedPathSegment("testbot")
        let url = try client.makeRepoURL(owner: "owner", repo: "repo", path: "/collaborators/\(encoded)")
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/repos/owner/repo/collaborators/testbot")
    }

    // MARK: - createFile URL

    @Test func createFileURL() throws {
        let client = makeClient()
        let url = try client.makeRepoURL(owner: "owner", repo: "repo", path: "/contents/hello.py")
        #expect(url.absoluteString == "https://forgejo.example.com/api/v1/repos/owner/repo/contents/hello.py")
    }

    // MARK: - Payload encoding

    @Test func createRepositoryPayloadEncoding() throws {
        let payload: [String: Any] = [
            "name": "test-repo",
            "description": "A test repo",
            "private": false,
            "auto_init": true,
        ]
        let data = try JSONSerialization.data(withJSONObject: payload)
        let dict = try #require(JSONSerialization.jsonObject(with: data) as? [String: Any])
        #expect(dict["name"] as? String == "test-repo")
        #expect(dict["auto_init"] as? Bool == true)
        #expect(dict["private"] as? Bool == false)
    }

    @Test func createFilePayloadEncoding() throws {
        let payload: [String: Any] = [
            "content": "base64content",
            "message": "Add file",
            "new_branch": "feature-branch",
        ]
        let data = try JSONSerialization.data(withJSONObject: payload)
        let dict = try #require(JSONSerialization.jsonObject(with: data) as? [String: Any])
        #expect(dict["content"] as? String == "base64content")
        #expect(dict["message"] as? String == "Add file")
        #expect(dict["new_branch"] as? String == "feature-branch")
    }
}