import Foundation

struct Branch: Codable, Hashable {
    let label: String?
    let ref: String?
    let sha: String?
}

struct PRLabel: Codable, Hashable, Identifiable {
    let id: Int64?
    let name: String
    let color: String?
}

struct PRUser: Codable, Hashable {
    let id: Int64?
    let login: String
    let fullName: String?
}

/// A pull request as returned by `/repos/{owner}/{repo}/pulls` and
/// `/issues/{index}`.
struct PullRequest: Codable, Hashable, Identifiable {
    let id: Int64
    let number: Int
    let title: String
    let body: String?
    let state: String            // open | closed | merged
    let htmlURL: String?
    let diffURL: String?
    let patchURL: String?
    let user: PRUser?
    let assignees: [PRUser]?
    let labels: [PRLabel]?
    let head: Branch?
    let base: Branch?
    let createdAt: Date?
    let updatedAt: Date?
    let merged: Bool?
    let mergeable: Bool?
    let draft: Bool?

    enum CodingKeys: String, CodingKey {
        case id, number, title, body, state, user, assignees, labels
        case htmlURL = "html_url"
        case diffURL = "diff_url"
        case patchURL = "patch_url"
        case head, base
        case createdAt = "created_at"
        case updatedAt = "updated_at"
        case merged, mergeable, draft
    }
}

/// A single review submission (approve / request changes / comment).
struct PullReview: Codable, Identifiable {
    let id: Int64
    let state: String            // APPROVED | REQUEST_CHANGES | COMMENT | PENDING
    let body: String?
    let user: PRUser?
    let submittedAt: Date?

    enum CodingKeys: String, CodingKey {
        case id, state, body, user
        case submittedAt = "submitted_at"
    }
}

/// An issue/PR comment.
struct IssueComment: Codable, Identifiable {
    let id: Int64
    let body: String?
    let user: PRUser?
    let createdAt: Date?
    let updatedAt: Date?

    enum CodingKeys: String, CodingKey {
        case id, body, user
        case createdAt = "created_at"
        case updatedAt = "updated_at"
    }
}

/// A commit in a pull request.
struct PRCommit: Codable, Hashable, Identifiable {
    struct Meta: Codable, Hashable {
        let sha: String?
        let message: String?
    }
    struct Author: Codable, Hashable {
        let name: String?
        let email: String?
        let login: String?
    }
    let sha: String?
    let commit: Meta?
    let author: Author?
    /// Gitea's PR commits have no `id` field — only `sha`. Use sha as the
    /// identity so the array decodes and SwiftUI can key rows on it.
    var id: String { sha ?? commit?.sha ?? "\(author?.name ?? "")-\(commit?.message?.hashValue ?? 0)" }

    enum CodingKeys: String, CodingKey {
        case sha, commit, author
    }
}