import Foundation

/// `speakers.json` — the final stored output (docs §6): per-chunk `label-merge`
/// results concatenated, timestamps offset back to global seconds, names unified.
/// This is the hand-off to the downstream summarizer; the app stops here.
struct SpeakersFile: Codable {
    let sessionId: String
    let app: String
    let durationSec: Double
    let speakers: [Speaker]
    let segments: [Segment]
    let models: [String: String]

    struct Speaker: Codable, Equatable {
        let name: String
        let source: String
        let overlapConfidence: Double?
        let matchSimilarity: Double?
        enum CodingKeys: String, CodingKey {
            case name, source
            case overlapConfidence = "overlap_confidence"
            case matchSimilarity = "match_similarity"
        }
    }

    struct Segment: Codable, Equatable {
        let start: Double
        let end: Double
        let speaker: String
        let text: String?
    }

    enum CodingKeys: String, CodingKey {
        case sessionId = "session_id"
        case app
        case durationSec = "duration_sec"
        case speakers, segments, models
    }

    func write(to url: URL) throws {
        let encoder = JSONEncoder()
        encoder.outputFormatting = [.prettyPrinted, .sortedKeys]
        try encoder.encode(self).write(to: url)
    }
}