import 'dart:convert';

class HotgameBridgeActions {
  static const String recharge = 'recharge';
  static const String quit = 'quit';
  static const String loadComplete = 'loadComplete';
  static const String debugLog = 'debugLog';

  static String normalize(String action) {
    final trimmed = action.trim();
    final lower = trimmed.toLowerCase();
    switch (lower) {
      case 'recharge':
      case 'pay':
      case 'gamepay':
      case 'gamerecharge':
      case 'insufficient':
      case 'insufficientbalance':
        return recharge;
      case 'quit':
      case 'exit':
      case 'close':
      case 'closegame':
      case 'destroy':
        return quit;
      case 'loadcomplete':
      case 'gameloaded':
      case 'loaded':
      case 'ready':
        return loadComplete;
      case 'debuglog':
        return debugLog;
      default:
        return trimmed;
    }
  }
}

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

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

  static HotgameBridgeMessage fromAction(String action, String rawMessage) {
    return HotgameBridgeMessage(
      action: HotgameBridgeActions.normalize(action),
      payload: _parsePayload(rawMessage),
    );
  }

  static HotgameBridgeMessage parse(String rawMessage) {
    try {
      final dynamic decoded = jsonDecode(rawMessage);
      if (decoded is Map<String, dynamic>) {
        return HotgameBridgeMessage(
          action: HotgameBridgeActions.normalize(
            (decoded['action'] ??
                    decoded['cmd'] ??
                    decoded['event'] ??
                    decoded['method'] ??
                    decoded['type'] ??
                    '')
                .toString(),
          ),
          payload: _parsePayload(
            decoded['payload'] ?? decoded['data'] ?? decoded['params'],
          ),
        );
      }
    } catch (_) {}
    return HotgameBridgeMessage(
      action: HotgameBridgeActions.normalize(rawMessage),
    );
  }

  static Map<String, dynamic> _parsePayload(dynamic rawPayload) {
    if (rawPayload is Map<String, dynamic>) {
      return rawPayload;
    }
    if (rawPayload is String) {
      final trimmed = rawPayload.trim();
      if (trimmed.isEmpty) {
        return const <String, dynamic>{};
      }
      try {
        final dynamic decoded = jsonDecode(trimmed);
        if (decoded is Map<String, dynamic>) {
          return decoded;
        }
      } catch (_) {}
      return <String, dynamic>{'raw': trimmed};
    }
    return const <String, dynamic>{};
  }
}

class HotgameJsBridge {
  static const String channelName = 'HotgameBridgeChannel';

  static String bootstrapScript({Map<String, dynamic>? launchPayload}) {
    final safeLaunchPayload = jsonEncode(
      launchPayload ?? const <String, dynamic>{},
    );
    return '''
      (function() {
        const launchPayload = $safeLaunchPayload;

        function toPayload(input) {
          if (typeof input === 'string') {
            try {
              return JSON.parse(input);
            } catch (_) {
              return input.trim() ? { raw: input.trim() } : {};
            }
          }
          if (input && typeof input === 'object') {
            return input;
          }
          return {};
        }

        function stringifyForLog(value) {
          if (value == null) {
            return '';
          }
          if (typeof value === 'string') {
            return value.length > 320 ? value.slice(0, 320) + '...' : value;
          }
          try {
            const text = JSON.stringify(value);
            return text.length > 320 ? text.slice(0, 320) + '...' : text;
          } catch (_) {
            return String(value);
          }
        }

        function postMessage(action, input) {
          const payload = toPayload(input);
          $channelName.postMessage(JSON.stringify({
            action: action,
            payload: payload
          }));
          return payload;
        }

        function postDebug(tag, payload) {
          postMessage('${HotgameBridgeActions.debugLog}', {
            tag: tag,
            message: stringifyForLog(payload)
          });
        }

        function dispatchLaunchPayload(payload) {
          const normalizedPayload =
              payload && typeof payload === 'object' ? payload : {};
          const launchConfig =
              normalizedPayload.launchConfig &&
                  typeof normalizedPayload.launchConfig === 'object'
              ? normalizedPayload.launchConfig
              : {};
          const entry =
              normalizedPayload.entry && typeof normalizedPayload.entry === 'object'
              ? normalizedPayload.entry
              : {};
          window.__hotgameLaunchPayload = normalizedPayload;
          window.hotgameLaunchPayload = normalizedPayload;
          window.__hotgameLaunchConfig = launchConfig;
          window.hotgameLaunchConfig = launchConfig;
          window.__hotgameLaunchEntry = entry;
          window.hotgameLaunchEntry = entry;
          if (typeof window.onHotgameLaunchConfig === 'function') {
            window.onHotgameLaunchConfig(launchConfig, normalizedPayload);
          }
          if (typeof window.dispatchEvent === 'function' && typeof CustomEvent === 'function') {
            window.dispatchEvent(
              new CustomEvent('hotgameLaunchConfig', { detail: launchConfig })
            );
          }
        }

        function installPostMessageObject(name, action) {
          const existing = window[name];
          if (!existing || typeof existing.postMessage !== 'function') {
            window[name] = {
              postMessage: function(body) {
                return postMessage(action, body);
              }
            };
          }
        }

        function installWebkitHandler(name, action) {
          window.webkit = window.webkit || {};
          window.webkit.messageHandlers = window.webkit.messageHandlers || {};
          if (!window.webkit.messageHandlers[name] ||
              typeof window.webkit.messageHandlers[name].postMessage !== 'function') {
            window.webkit.messageHandlers[name] = {
              postMessage: function(body) {
                return postMessage(action, body);
              }
            };
          }
        }

        function installJsBridgeFunction(name, action) {
          window.JsBridge = window.JsBridge || {};
          window.JsBridge[name] = function(body) {
            return postMessage(action, body || {});
          };
        }

        if (!window.__hotgameBridgeReady) {
          window.__hotgameBridgeReady = true;
          installJsBridgeFunction('recharge', '${HotgameBridgeActions.recharge}');
          installJsBridgeFunction('quit', '${HotgameBridgeActions.quit}');
          installJsBridgeFunction('exit', '${HotgameBridgeActions.quit}');
          installJsBridgeFunction('closeGame', '${HotgameBridgeActions.quit}');
          installPostMessageObject('recharge', '${HotgameBridgeActions.recharge}');
          installPostMessageObject('quit', '${HotgameBridgeActions.quit}');
          installPostMessageObject('loadComplete', '${HotgameBridgeActions.loadComplete}');
          installWebkitHandler('recharge', '${HotgameBridgeActions.recharge}');
          installWebkitHandler('quit', '${HotgameBridgeActions.quit}');
          installWebkitHandler('loadComplete', '${HotgameBridgeActions.loadComplete}');
          window.NativeBridge = window.NativeBridge || {};
          window.NativeBridge.recharge = function(body) {
            return postMessage('${HotgameBridgeActions.recharge}', body || {});
          };
          window.NativeBridge.quit = function(body) {
            return postMessage('${HotgameBridgeActions.quit}', body || {});
          };
          window.NativeBridge.closeGame = function(body) {
            return postMessage('${HotgameBridgeActions.quit}', body || {});
          };
          window.NativeBridge.rechargeSuccess = function(body) {
            return notifyRechargeSuccess(body || {});
          };
          window.__hotgameBridgeDebug = postDebug;
          postDebug('bridge.ready', {
            href: window.location && window.location.href,
            hasJsBridge: !!window.JsBridge,
            hasRechargeSuccess: typeof window.rechargeSuccess === 'function'
          });
        }

        function notifyRechargeSuccess(body) {
          const payload = body || {};
          let notified = false;
          if (typeof window.rechargeSuccess === 'function') {
            window.rechargeSuccess();
            notified = true;
          }
          if (typeof window.onRechargeSuccess === 'function') {
            window.onRechargeSuccess(payload);
            notified = true;
          }
          if (typeof window.dispatchEvent === 'function' && typeof CustomEvent === 'function') {
            window.dispatchEvent(
              new CustomEvent('rechargeSuccess', { detail: payload })
            );
          }
          return notified;
        }

        window.__hotgameNotifyRechargeSuccess = notifyRechargeSuccess;
        dispatchLaunchPayload(launchPayload);
      })();
    ''';
  }

  static String buildRechargeSuccessScript({Map<String, dynamic>? payload}) {
    final safePayload = jsonEncode(
      payload ??
          <String, dynamic>{'timestamp': DateTime.now().millisecondsSinceEpoch},
    );
    return '''
      (function() {
        const payload = $safePayload;
        if (typeof window.__hotgameBridgeDebug === 'function') {
          window.__hotgameBridgeDebug('recharge.success', payload);
        }
        if (typeof window.__hotgameNotifyRechargeSuccess === 'function') {
          window.__hotgameNotifyRechargeSuccess(payload);
          return;
        }
        if (typeof window.rechargeSuccess === 'function') {
          window.rechargeSuccess();
        }
        if (typeof window.onRechargeSuccess === 'function') {
          window.onRechargeSuccess(payload);
        }
        if (typeof window.dispatchEvent === 'function' && typeof CustomEvent === 'function') {
          window.dispatchEvent(
            new CustomEvent('rechargeSuccess', { detail: payload })
          );
        }
      })();
    ''';
  }
}