import Foundation
import SwiftData

@Model
final class CelestiaSession {
    var id: UUID
    var title: String
    var startTime: Date
    var endTime: Date?
    var localAudioPath: String?
    var isSynced: Bool
    var cloudSessionId: String?
    
    @Relationship(deleteRule: .cascade, inverse: \CelestiaTimelineEvent.session)
    var events: [CelestiaTimelineEvent]
    
    @Relationship(deleteRule: .cascade, inverse: \AudioChunk.session)
    var audioChunks: [AudioChunk]
    
    var durationMs: Int64 {
        guard let end = endTime else { return 0 }
        return Int64(end.timeIntervalSince(startTime) * 1000)
    }
    
    var durationFormatted: String {
        guard let end = endTime else { return "正在录音..." }
        let interval = end.timeIntervalSince(startTime)
        let hours = Int(interval) / 3600
        let minutes = (Int(interval) % 3600) / 60
        let seconds = Int(interval) % 60
        if hours > 0 {
            return String(format: "%d:%02d:%02d", hours, minutes, seconds)
        }
        return String(format: "%02d:%02d", minutes, seconds)
    }
    
    var photoCount: Int {
        events.filter { $0.eventType == "PHOTO" }.count
    }
    
    var noteCount: Int {
        events.filter { $0.eventType == "NOTE" || $0.eventType == "MARKER" }.count
    }
    
    init(title: String, localAudioPath: String? = nil) {
        self.id = UUID()
        self.title = title
        self.startTime = Date()
        self.endTime = nil
        self.localAudioPath = localAudioPath
        self.isSynced = false
        self.cloudSessionId = nil
        self.events = []
        self.audioChunks = []
    }
}