import 'dart:convert';
import 'dart:typed_data';

import 'package:get/get.dart';
import 'package:path/path.dart';
import 'package:solian/models/attachment.dart';
import 'package:solian/providers/auth.dart';
import 'package:solian/services.dart';

class AttachmentProvider extends GetConnect {
  static Map<String, String> mimetypeOverrides = {
    'mov': 'video/quicktime',
    'mp4': 'video/mp4'
  };

  @override
  void onInit() {
    httpClient.baseUrl = ServiceFinder.buildUrl('files', null);
  }

  final Map<int, Attachment> _cachedResponses = {};

  Future<Attachment?> getMetadata(int id, {noCache = false}) async {
    if (!noCache && _cachedResponses.containsKey(id)) {
      return _cachedResponses[id]!;
    }

    final resp = await get('/attachments/$id/meta');
    if (resp.statusCode == 200) {
      final result = Attachment.fromJson(resp.body);
      if (result.destination != 0 && result.isAnalyzed) {
        _cachedResponses[id] = result;
      }
      return result;
    }

    return null;
  }

  Future<Response> createAttachment(
    Uint8List data,
    String path,
    String usage,
    Map<String, dynamic>? metadata,
  ) async {
    final AuthProvider auth = Get.find();
    if (auth.isAuthorized.isFalse) throw Exception('unauthorized');

    final client = auth.configureClient(
      'files',
      timeout: const Duration(minutes: 3),
    );

    final filePayload = MultipartFile(data, filename: basename(path));
    final fileAlt = basename(path).contains('.')
        ? basename(path).substring(0, basename(path).lastIndexOf('.'))
        : basename(path);
    final fileExt = basename(path)
        .substring(basename(path).lastIndexOf('.') + 1)
        .toLowerCase();

    // Override for some files cannot be detected mimetype by server-side
    String? mimetypeOverride;
    if (mimetypeOverrides.keys.contains(fileExt)) {
      mimetypeOverride = mimetypeOverrides[fileExt];
    }
    final payload = FormData({
      'alt': fileAlt,
      'file': filePayload,
      'usage': usage,
      if (mimetypeOverride != null) 'mimetype': mimetypeOverride,
      'metadata': jsonEncode(metadata),
    });
    final resp = await client.post('/attachments', payload);
    if (resp.statusCode != 200) {
      throw Exception(resp.bodyString);
    }

    return resp;
  }

  Future<Response> updateAttachment(
    int id,
    String alt,
    String usage, {
    bool isMature = false,
  }) async {
    final AuthProvider auth = Get.find();
    if (auth.isAuthorized.isFalse) throw Exception('unauthorized');

    final client = auth.configureClient('files');

    var resp = await client.put('/attachments/$id', {
      'alt': alt,
      'usage': usage,
      'is_mature': isMature,
    });

    if (resp.statusCode != 200) {
      throw Exception(resp.bodyString);
    }

    return resp;
  }

  Future<Response> deleteAttachment(int id) async {
    final AuthProvider auth = Get.find();
    if (auth.isAuthorized.isFalse) throw Exception('unauthorized');

    final client = auth.configureClient('files');

    var resp = await client.delete('/attachments/$id');
    if (resp.statusCode != 200) {
      throw Exception(resp.bodyString);
    }

    return resp;
  }

  void clearCache({int? id}) {
    if (id != null) {
      _cachedResponses.remove(id);
    } else {
      _cachedResponses.clear();
    }
  }
}