import 'dart:convert';

import 'package:yumi/modules/room_game/data/models/room_game_models.dart';

class BaishunBridgeActions {
  static const String getConfig = 'getConfig';
  static const String gameLoaded = 'gameLoaded';
  static const String gameRecharge = 'gameRecharge';
  static const String destroy = 'destroy';
}

class BaishunBridgeMessage {
  const BaishunBridgeMessage({
    required this.action,
    this.payload = const <String, dynamic>{},
  });

  final String action;
  final Map<String, dynamic> payload;

  static BaishunBridgeMessage parse(String rawMessage) {
    try {
      final dynamic decoded = jsonDecode(rawMessage);
      if (decoded is Map<String, dynamic>) {
        final rawPayload = decoded['payload'];
        return BaishunBridgeMessage(
          action: (decoded['action'] ?? '').toString(),
          payload:
              rawPayload is Map<String, dynamic>
                  ? rawPayload
                  : const <String, dynamic>{},
        );
      }
    } catch (_) {}
    return BaishunBridgeMessage(action: rawMessage.trim());
  }
}

class BaishunJsBridge {
  static const String channelName = 'BaishunBridgeChannel';

  static String bootstrapScript() {
    return '''
      (function() {
        if (window.__baishunBridgeReady) {
          return;
        }
        window.__baishunBridgeReady = true;
        window.NativeBridge = window.NativeBridge || {};
        window.NativeBridge.getConfig = function(callback) {
          if (typeof callback === 'function') {
            window.__baishunGetConfigCallback = callback;
          }
          $channelName.postMessage(JSON.stringify({ action: '${BaishunBridgeActions.getConfig}' }));
          return window.__baishunLastConfig || null;
        };
        window.NativeBridge.destroy = function(payload) {
          $channelName.postMessage(JSON.stringify({ action: '${BaishunBridgeActions.destroy}', payload: payload || {} }));
        };
        window.NativeBridge.gameRecharge = function(payload) {
          $channelName.postMessage(JSON.stringify({ action: '${BaishunBridgeActions.gameRecharge}', payload: payload || {} }));
        };
        window.NativeBridge.gameLoaded = function(payload) {
          $channelName.postMessage(JSON.stringify({ action: '${BaishunBridgeActions.gameLoaded}', payload: payload || {} }));
        };
        window.baishunChannel = window.baishunChannel || {};
        window.baishunChannel.walletUpdate = function(payload) {
          window.__baishunLastWalletPayload = payload || {};
          if (typeof window.walletUpdate === 'function') {
            window.walletUpdate(payload || {});
          }
          if (typeof window.onWalletUpdate === 'function') {
            window.onWalletUpdate(payload || {});
          }
          if (typeof window.dispatchEvent === 'function') {
            window.dispatchEvent(new CustomEvent('walletUpdate', { detail: payload || {} }));
          }
        };
        if (typeof window.onBaishunBridgeReady === 'function') {
          window.onBaishunBridgeReady(window.NativeBridge);
        }
        if (typeof window.dispatchEvent === 'function') {
          window.dispatchEvent(new CustomEvent('baishunBridgeReady', { detail: { nativeBridge: true } }));
        }
      })();
    ''';
  }

  static String buildConfigScript(BaishunBridgeConfigModel config) {
    final payload = jsonEncode(config.toJson());
    return '''
      (function() {
        const config = $payload;
        window.__baishunLastConfig = config;
        if (typeof window.__baishunGetConfigCallback === 'function') {
          window.__baishunGetConfigCallback(config);
        }
        if (typeof window.onBaishunConfig === 'function') {
          window.onBaishunConfig(config);
        }
        if (typeof window.dispatchEvent === 'function') {
          window.dispatchEvent(new CustomEvent('baishunConfig', { detail: config }));
        }
      })();
    ''';
  }

  static String buildWalletUpdateScript({Map<String, dynamic>? payload}) {
    final safePayload = jsonEncode(
      payload ??
          <String, dynamic>{'timestamp': DateTime.now().millisecondsSinceEpoch},
    );
    return '''
      (function() {
        const payload = $safePayload;
        if (window.baishunChannel && typeof window.baishunChannel.walletUpdate === 'function') {
          window.baishunChannel.walletUpdate(payload);
        }
      })();
    ''';
  }

  static String injectBootstrapHtml({
    required String html,
    required Uri entryUri,
    required BaishunBridgeConfigModel config,
  }) {
    final baseHref = htmlEscape.convert(entryUri.toString());
    final injection = '''
      <base href="$baseHref" />
      <script>
        ${bootstrapScript()}
        ${buildConfigScript(config)}
      </script>
    ''';

    final headPattern = RegExp(r'<head[^>]*>', caseSensitive: false);
    final headMatch = headPattern.firstMatch(html);
    if (headMatch != null) {
      return html.replaceRange(headMatch.end, headMatch.end, injection);
    }
    return '$injection$html';
  }
}