import 'package:flutter/foundation.dart';

import 'parse.dart';

/// The camera's storage (SD card, or internal storage on cameras that have it).
@immutable
class StorageInfo {
  const StorageInfo({
    this.location,
    this.inserted = false,
    this.initializing = false,
    this.formatting = false,
    this.formatted = false,
    this.full = false,
    this.error = false,
    this.readOnly = false,
    this.invalidFormat = false,
    this.verified = false,
    this.totalMB,
    this.remainingMB,
    this.availableCaptureCount,
    this.availableRecordingSeconds,
  });

  factory StorageInfo.fromMap(Map<String, dynamic> m) => StorageInfo(
        location: asString(m['location']),
        inserted: asBool(m['inserted']) ?? false,
        initializing: asBool(m['initializing']) ?? false,
        formatting: asBool(m['formatting']) ?? false,
        formatted: asBool(m['formatted']) ?? false,
        full: asBool(m['full']) ?? false,
        error: asBool(m['error']) ?? false,
        readOnly: asBool(m['readOnly']) ?? false,
        invalidFormat: asBool(m['invalidFormat']) ?? false,
        verified: asBool(m['verified']) ?? false,
        totalMB: asInt(m['totalMB']),
        remainingMB: asInt(m['remainingMB']),
        availableCaptureCount: asInt(m['availableCaptureCount']),
        availableRecordingSeconds: asInt(m['availableRecordingSeconds']),
      );

  final String? location; // SDCARD / INTERNAL_STORAGE
  final bool inserted;
  final bool initializing;
  final bool formatting;
  final bool formatted;
  final bool full;
  final bool error;
  final bool readOnly;
  final bool invalidFormat;
  final bool verified;
  final int? totalMB;
  final int? remainingMB;
  final int? availableCaptureCount;
  final int? availableRecordingSeconds;

  /// One word for the HUD's storage chip, worst condition first.
  String get status {
    if (!inserted) return 'No SD';
    if (error) return 'SD error';
    if (invalidFormat) return 'Format SD';
    if (formatting) return 'Formatting';
    if (initializing) return 'Initializing';
    if (full) return 'SD full';
    if (readOnly) return 'Read-only';
    return 'OK';
  }

  bool get usable => inserted && !error && !invalidFormat && !formatting && !initializing && !full;
}

/// Camera state from the bridge: recording, exposure read-back, storage and
/// the watched camera settings. Recording and exposure arrive as their own
/// `camera` / `exposure` events; storage and settings as the `storage` and
/// `cameraSettings` groups of the telemetry tick (≤2 Hz).
class CameraState extends ChangeNotifier {
  bool isRecording = false;
  int recordSeconds = 0;

  /// `SHOOT_PHOTO` / `RECORD_VIDEO` / `PLAYBACK` / `MEDIA_DOWNLOAD`.
  String? mode;

  // Exposure read-back, in the same labels the setters accept.
  String? iso; // "100", "AUTO", …
  String? shutter; // "1/240"
  String? aperture; // "f/2.8"
  String? ev; // "-0.3"

  StorageInfo? storage;

  bool? aeLock;
  String? focusMode; // MANUAL / AUTO / AFC
  String? photoAspectRatio; // RATIO_4_3 / RATIO_16_9 / RATIO_3_2
  String? photoFileFormat; // JPEG / RAW / RAW_AND_JPEG
  String? videoResolution; // RESOLUTION_3840x2160 …
  String? videoFrameRate; // FRAME_RATE_29_DOT_970_FPS …
  String? videoFileFormat; // MOV / MP4
  String? colorProfile; // NONE / D_LOG / …

  DateTime? updatedAt;

  void applySystem(Map<String, dynamic> e) {
    isRecording = asBool(e['isRecording']) ?? false;
    recordSeconds = asInt(e['recordingTimeSeconds']) ?? recordSeconds;
    mode = asString(e['mode']) ?? mode;
    notifyListeners();
  }

  void applyExposure(Map<String, dynamic> e) {
    iso = asString(e['iso']);
    shutter = asString(e['shutter']);
    aperture = asString(e['aperture']);
    ev = asString(e['ev']);
    notifyListeners();
  }

  /// From the telemetry tick; an absent group means the camera never reported it.
  void applyTelemetry({Map<String, dynamic>? storage, Map<String, dynamic>? settings}) {
    this.storage = storage == null ? null : StorageInfo.fromMap(storage);
    aeLock = asBool(settings?['aeLock']);
    focusMode = asString(settings?['focusMode']);
    photoAspectRatio = asString(settings?['photoAspectRatio']);
    photoFileFormat = asString(settings?['photoFileFormat']);
    videoResolution = asString(settings?['videoResolution']);
    videoFrameRate = asString(settings?['videoFrameRate']);
    videoFileFormat = asString(settings?['videoFileFormat']);
    colorProfile = asString(settings?['colorProfile']);
    updatedAt = DateTime.now();
    notifyListeners();
  }

  void clear() {
    isRecording = false;
    recordSeconds = 0;
    mode = iso = shutter = aperture = ev = null;
    storage = null;
    aeLock = null;
    focusMode = photoAspectRatio = photoFileFormat = videoResolution = videoFrameRate = videoFileFormat = colorProfile = null;
    updatedAt = null;
    notifyListeners();
  }
}