import Foundation

public struct OrgSocialPost: Sendable, Equatable {
    /// RFC 3339 timestamp, unique identifier for the post.
    public var timestamp: String
    /// Parsed date from `timestamp`.
    public var date: Date
    /// Body text of the post (Org Mode syntax preserved, comment and property lines stripped).
    public var text: String
    /// ISO 639-1 language code.
    public var lang: String?
    /// Space-separated tags parsed into individual strings.
    public var tags: [String]
    /// Client that created the post.
    public let client: String?
    /// URL#timestamp of the post being replied to.
    public let replyTo: String?
    /// URL#timestamp of the post being boosted/reshared.
    public let include: String?
    /// Poll close date.
    public let pollEnd: Date?
    /// Selected option when this post is a poll vote.
    public let pollOption: String?
    /// "Group Name relay-url" when posted to a group.
    public let group: String?
    /// Mood/reaction emoji.
    public var mood: String?
    /// "old-url new-url" for account migration posts.
    public let migration: String?
    /// `"public"` or `"mention"`. `nil` defaults to public.
    public var visibility: String?

    // Populated during timeline assembly, not by the parser.
    public var authorNick: String?
    public var authorURL: URL?
    public var authorAvatar: URL?
    public var feedURL: URL?

    /// Stable unique ID combining feed URL and timestamp — safe for ForEach in merged timelines.
    public var stableID: String {
        "\(feedURL?.absoluteString ?? "unknown")#\(timestamp)"
    }

    /// Whether this post has nothing to render as a standalone timeline row —
    /// i.e. its body is empty. Covers every protocol artefact (pure reaction,
    /// pure boost, poll vote, migration announcement) plus the accidental
    /// empty post. Quote-boosts, text posts and polls all carry a body and
    /// are NOT flagged.
    ///
    /// Used by timeline and profile views to hide these rows so the original
    /// content they reference is shown only in its authoritative location.
    public var isPureInteraction: Bool {
        text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
    }

    public init(
        timestamp: String,
        date: Date,
        text: String,
        lang: String? = nil,
        tags: [String] = [],
        client: String? = nil,
        replyTo: String? = nil,
        include: String? = nil,
        pollEnd: Date? = nil,
        pollOption: String? = nil,
        group: String? = nil,
        mood: String? = nil,
        migration: String? = nil,
        visibility: String? = nil,
        authorNick: String? = nil,
        authorURL: URL? = nil,
        authorAvatar: URL? = nil,
        feedURL: URL? = nil
    ) {
        self.timestamp = timestamp
        self.date = date
        self.text = text
        self.lang = lang
        self.tags = tags
        self.client = client
        self.replyTo = replyTo
        self.include = include
        self.pollEnd = pollEnd
        self.pollOption = pollOption
        self.group = group
        self.mood = mood
        self.migration = migration
        self.visibility = visibility
        self.authorNick = authorNick
        self.authorURL = authorURL
        self.authorAvatar = authorAvatar
        self.feedURL = feedURL
    }
}