import Foundation

/// One issue; `issue list` rows and the header of `issue show`.
nonisolated struct Issue: Decodable, Sendable, Hashable, Identifiable {
    let number: Int64
    let title: String
    let state: String
    let author: String
    let milestone: String?
    let labels: [String]?
    let assignees: [String]?
    let body: String?
    let createdAt: Date

    enum CodingKeys: String, CodingKey {
        case number, title, state, author, milestone, labels, assignees, body
        case createdAt = "created_at"
    }

    var id: Int64 { number }
    var isOpen: Bool { state == "open" }
}

/// `issue show <owner/name> <n>` — the issue plus its comments.
nonisolated struct IssueDetail: Decodable, Sendable, Hashable {
    let number: Int64
    let title: String
    let state: String
    let author: String
    let milestone: String?
    let labels: [String]?
    let assignees: [String]?
    let body: String?
    let bodyFormat: String?
    let createdAt: Date
    let reactions: [ReactionCount]?
    let comments: [Comment]?

    enum CodingKeys: String, CodingKey {
        case number, title, state, author, milestone, labels, assignees, body, reactions, comments
        case bodyFormat = "body_format"
        case createdAt = "created_at"
    }

    var isOpen: Bool { state == "open" }

    nonisolated struct Comment: Decodable, Sendable, Hashable, Identifiable {
        /// What `--comment` names. Absent from a server older than v1.39.0.
        let commentID: Int64?
        let author: String
        let body: String
        let bodyFormat: String?
        let createdAt: Date
        let reactions: [ReactionCount]?
        /// "system" for a line the server posted (a retarget, a queued
        /// merge), which takes no reactions (krz/gitbay#332).
        let kind: String?

        enum CodingKeys: String, CodingKey {
            case author, body, reactions, kind
            case commentID = "id"
            case bodyFormat = "body_format"
            case createdAt = "created_at"
        }

        /// A server without `kind` names the author "system" on those lines;
        /// an account can carry that name too, so `kind` wins when present.
        var isSystem: Bool { kind.map { $0 == "system" } ?? (author == "system") }

        var id: String { author + createdAt.timeIntervalSince1970.description + body }
    }
}