import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';

import '../i18n/strings.g.dart';
import '../services/camera_availability.dart';

/// Asks the user to take a photo or pick one from the gallery, then returns its
/// bytes (or null if cancelled/unavailable). Camera failures — e.g. on desktop,
/// which has no camera — are swallowed and yield null.
Future<Uint8List?> pickPhoto(BuildContext context) async {
  final t = context.t;
  final source = await showModalBottomSheet<ImageSource>(
    context: context,
    builder: (sheetContext) => SafeArea(
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          // Only offer the camera when the device actually has one; camera-less
          // devices (Chromebooks, Automotive, some TVs) fall back to gallery.
          if (deviceHasCamera)
            ListTile(
              key: const Key('photo.source.camera'),
              leading: const Icon(Icons.photo_camera_outlined),
              title: Text(t.photo.camera),
              onTap: () => Navigator.of(sheetContext).pop(ImageSource.camera),
            ),
          ListTile(
            key: const Key('photo.source.gallery'),
            leading: const Icon(Icons.photo_library_outlined),
            title: Text(t.photo.gallery),
            onTap: () => Navigator.of(sheetContext).pop(ImageSource.gallery),
          ),
        ],
      ),
    ),
  );
  if (source == null) return null;
  try {
    final file = await ImagePicker().pickImage(
      source: source,
      maxWidth: 1280,
      imageQuality: 80,
    );
    return file?.readAsBytes();
  } on Object {
    return null;
  }
}

/// Rapid multi-capture for the "capture now, catalogue later" flow: pick many
/// photos from the gallery at once, or shoot a burst with the camera (it
/// reopens after each shot until the user cancels). Returns every captured
/// image's bytes, or an empty list if cancelled/unavailable.
Future<List<Uint8List>> pickPhotos(BuildContext context) async {
  final t = context.t;
  final source = await showModalBottomSheet<ImageSource>(
    context: context,
    builder: (sheetContext) => SafeArea(
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          // Only offer the camera when the device actually has one; camera-less
          // devices (Chromebooks, Automotive, some TVs) fall back to gallery.
          if (deviceHasCamera)
            ListTile(
              key: const Key('photos.source.camera'),
              leading: const Icon(Icons.photo_camera_outlined),
              title: Text(t.photo.camera),
              onTap: () => Navigator.of(sheetContext).pop(ImageSource.camera),
            ),
          ListTile(
            key: const Key('photos.source.gallery'),
            leading: const Icon(Icons.photo_library_outlined),
            title: Text(t.photo.gallery),
            onTap: () => Navigator.of(sheetContext).pop(ImageSource.gallery),
          ),
        ],
      ),
    ),
  );
  if (source == null) return const [];
  final picker = ImagePicker();
  try {
    if (source == ImageSource.gallery) {
      final files = await picker.pickMultiImage(
        maxWidth: 1280,
        imageQuality: 80,
      );
      return [for (final file in files) await file.readAsBytes()];
    }
    // Camera burst: keep reopening the camera until the user cancels.
    final shots = <Uint8List>[];
    while (true) {
      final file = await picker.pickImage(
        source: ImageSource.camera,
        maxWidth: 1280,
        imageQuality: 80,
      );
      if (file == null) break;
      shots.add(await file.readAsBytes());
    }
    return shots;
  } on Object {
    return const [];
  }
}