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';
  static const String debugLog = 'debugLog';
}

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

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

  static BaishunBridgeMessage fromAction(String action, String rawMessage) {
    return BaishunBridgeMessage(
      action: action,
      payload: _parsePayload(rawMessage),
    );
  }

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

  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 BaishunJsBridge {
  static const String channelName = 'BaishunBridgeChannel';

  static String bootstrapScript() {
    return '''
      (function() {
        if (window.__baishunBridgeReady) {
          return;
        }
        window.__baishunBridgeReady = true;
        window.NativeBridge = window.NativeBridge || {};
        function toPayload(input) {
          if (typeof input === 'function') {
            window.__baishunGetConfigCallback = input;
            return {};
          }
          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 rememberJsCallback(payload) {
          if (payload && typeof payload.jsCallback === 'string' && payload.jsCallback.trim()) {
            window.__baishunLastJsCallback = payload.jsCallback.trim();
          }
        }
        function postAction(action, input) {
          const payload = toPayload(input);
          rememberJsCallback(payload);
          $channelName.postMessage(JSON.stringify({ action: action, payload: payload }));
          return payload;
        }
        function clipText(value, limit) {
          const text = (value == null ? '' : String(value)).trim();
          if (!text) {
            return '';
          }
          return text.length > limit ? text.slice(0, limit) + '...' : text;
        }
        function stringifyForLog(value) {
          if (value == null) {
            return '';
          }
          if (typeof value === 'string') {
            return clipText(value, 320);
          }
          try {
            return clipText(JSON.stringify(value), 320);
          } catch (_) {
            return clipText(String(value), 320);
          }
        }
        function postDebug(tag, payload) {
          $channelName.postMessage(JSON.stringify({
            action: '${BaishunBridgeActions.debugLog}',
            payload: {
              tag: tag,
              message: stringifyForLog(payload)
            }
          }));
        }
        function ensureChannelAlias(name, handler) {
          if (!window[name] || typeof window[name].postMessage !== 'function') {
            window[name] = { postMessage: handler };
          }
        }
        function ensureWebkitHandler(name, handler) {
          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: handler };
          }
        }
        window.NativeBridge.getConfigSync = function() {
          return window.__baishunLastConfig || null;
        };
        window.NativeBridge.getConfig = function(params) {
          postAction('${BaishunBridgeActions.getConfig}', params);
          return window.__baishunLastConfig || null;
        };
        window.NativeBridge.destroy = function(payload) {
          postAction('${BaishunBridgeActions.destroy}', payload);
        };
        window.NativeBridge.gameRecharge = function(payload) {
          postAction('${BaishunBridgeActions.gameRecharge}', payload);
        };
        window.NativeBridge.gameLoaded = function(payload) {
          postAction('${BaishunBridgeActions.gameLoaded}', payload);
        };
        window.__baishunDebugLog = postDebug;
        ensureChannelAlias('getConfig', function(message) {
          window.NativeBridge.getConfig(message);
        });
        ensureChannelAlias('destroy', function(message) {
          window.NativeBridge.destroy(message);
        });
        ensureChannelAlias('gameRecharge', function(message) {
          window.NativeBridge.gameRecharge(message);
        });
        ensureChannelAlias('gameLoaded', function(message) {
          window.NativeBridge.gameLoaded(message);
        });
        ensureWebkitHandler('getConfig', function(message) {
          window.NativeBridge.getConfig(message);
        });
        ensureWebkitHandler('destroy', function(message) {
          window.NativeBridge.destroy(message);
        });
        ensureWebkitHandler('gameRecharge', function(message) {
          window.NativeBridge.gameRecharge(message);
        });
        ensureWebkitHandler('gameLoaded', function(message) {
          window.NativeBridge.gameLoaded(message);
        });
        if (!window.__baishunNetworkDebugReady) {
          window.__baishunNetworkDebugReady = true;
          if (typeof document !== 'undefined' && typeof document.addEventListener === 'function' && !window.__baishunInputDebugReady) {
            window.__baishunInputDebugReady = true;
            window.__baishunInputDebugCount = 0;
            ['pointerdown', 'touchstart', 'mousedown', 'click'].forEach(function(eventName) {
              document.addEventListener(eventName, function(event) {
                if ((window.__baishunInputDebugCount || 0) >= 24) {
                  return;
                }
                window.__baishunInputDebugCount = (window.__baishunInputDebugCount || 0) + 1;
                const target = event && event.target;
                const touch = event && event.touches && event.touches.length ? event.touches[0] : null;
                postDebug('input.' + eventName, {
                  x: touch ? touch.clientX : (event && event.clientX),
                  y: touch ? touch.clientY : (event && event.clientY),
                  pointerType: event && event.pointerType,
                  targetTag: target && target.tagName,
                  targetId: target && target.id,
                  targetClass: target && target.className
                });
              }, true);
            });
          }
          if (typeof window.addEventListener === 'function') {
            window.addEventListener('error', function(event) {
              const target = event && event.target;
              if (target && target !== window) {
                postDebug('resource.error', {
                  tag: target.tagName || '',
                  source: target.currentSrc || target.src || target.href || '',
                  outerHTML: target.outerHTML || ''
                });
                return;
              }
              postDebug('window.error', {
                message: event && event.message,
                source: event && event.filename,
                line: event && event.lineno,
                column: event && event.colno,
                stack: event && event.error && event.error.stack
              });
            }, true);
            window.addEventListener('unhandledrejection', function(event) {
              postDebug('promise.reject', {
                reason: event && event.reason
              });
            });
          }
          if (window.console && !window.__baishunConsoleDebugReady) {
            window.__baishunConsoleDebugReady = true;
            ['log', 'info', 'warn', 'error'].forEach(function(level) {
              const original = typeof window.console[level] === 'function'
                ? window.console[level].bind(window.console)
                : null;
              window.console[level] = function() {
                try {
                  postDebug('console.' + level, Array.prototype.slice.call(arguments));
                } catch (_) {}
                if (original) {
                  return original.apply(window.console, arguments);
                }
                return undefined;
              };
            });
          }
          if (typeof window.fetch === 'function') {
            const originalFetch = window.fetch.bind(window);
            window.fetch = function(input, init) {
              const url = typeof input === 'string' ? input : (input && input.url) || '';
              const method = (init && init.method) || 'GET';
              postDebug('fetch.start', { method: method, url: url });
              return originalFetch(input, init)
                .then(function(response) {
                  const cloned = response && typeof response.clone === 'function' ? response.clone() : null;
                  if (cloned && typeof cloned.text === 'function') {
                    cloned.text().then(function(text) {
                      if (!response.ok || /failed|error|exception|get user info/i.test(text)) {
                        postDebug('fetch.end', {
                          method: method,
                          url: url,
                          status: response.status,
                          body: text
                        });
                      } else {
                        postDebug('fetch.end', {
                          method: method,
                          url: url,
                          status: response.status
                        });
                      }
                    }).catch(function(error) {
                      postDebug('fetch.readError', {
                        method: method,
                        url: url,
                        error: error && error.message ? error.message : String(error)
                      });
                    });
                  } else {
                    postDebug('fetch.end', {
                      method: method,
                      url: url,
                      status: response && response.status
                    });
                  }
                  return response;
                })
                .catch(function(error) {
                  postDebug('fetch.error', {
                    method: method,
                    url: url,
                    error: error && error.message ? error.message : String(error)
                  });
                  throw error;
                });
            };
          }
          if (window.XMLHttpRequest && window.XMLHttpRequest.prototype) {
            const xhrOpen = window.XMLHttpRequest.prototype.open;
            const xhrSend = window.XMLHttpRequest.prototype.send;
            window.XMLHttpRequest.prototype.open = function(method, url) {
              this.__baishunMethod = method || 'GET';
              this.__baishunUrl = url || '';
              return xhrOpen.apply(this, arguments);
            };
            window.XMLHttpRequest.prototype.send = function(body) {
              const method = this.__baishunMethod || 'GET';
              const url = this.__baishunUrl || '';
              postDebug('xhr.start', { method: method, url: url });
              this.addEventListener('loadend', function() {
                const responseText = typeof this.responseText === 'string' ? this.responseText : '';
                if (this.status >= 400 || /failed|error|exception|get user info/i.test(responseText)) {
                  postDebug('xhr.end', {
                    method: method,
                    url: url,
                    status: this.status,
                    body: responseText
                  });
                } else {
                  postDebug('xhr.end', {
                    method: method,
                    url: url,
                    status: this.status
                  });
                }
              });
              this.addEventListener('error', function() {
                postDebug('xhr.error', {
                  method: method,
                  url: url,
                  status: this.status
                });
              });
              return xhrSend.apply(this, arguments);
            };
          }
        }
        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' && typeof CustomEvent === 'function') {
            window.dispatchEvent(new CustomEvent('walletUpdate', { detail: payload || {} }));
          }
        };
        if (typeof window.dispatchEvent === 'function' && typeof CustomEvent === 'function') {
          window.dispatchEvent(new CustomEvent('baishunBridgeReady'));
        }
      })();
    ''';
  }

  static String buildConfigScript(
    BaishunBridgeConfigModel config, {
    String? jsCallbackPath,
  }) {
    final payload = jsonEncode(config.toJson());
    final encodedCallbackPath = jsonEncode(jsCallbackPath?.trim() ?? '');
    return '''
      (function() {
        const config = $payload;
        const explicitCallbackPath = $encodedCallbackPath;
        function resolvePath(path) {
          if (!path || typeof path !== 'string') {
            return null;
          }
          const parts = path.split('.').filter(Boolean);
          if (!parts.length) {
            return null;
          }
          let scope = window;
          for (let i = 0; i < parts.length - 1; i += 1) {
            scope = scope ? scope[parts[i]] : null;
          }
          if (!scope) {
            return null;
          }
          const methodName = parts[parts.length - 1];
          const method = scope[methodName];
          if (typeof method !== 'function') {
            return null;
          }
          return { scope: scope, method: method };
        }
        function invokeCallbackPath(path) {
          const target = resolvePath(path);
          if (!target) {
            return false;
          }
          target.method.call(target.scope, config);
          return true;
        }
        window.__baishunLastConfig = config;
        window.baishunBridgeConfig = config;
        window.NativeBridge = window.NativeBridge || {};
        window.NativeBridge.config = config;
        if (explicitCallbackPath) {
          window.__baishunLastJsCallback = explicitCallbackPath;
        }
        if (typeof window.__baishunGetConfigCallback === 'function') {
          window.__baishunGetConfigCallback(config);
          window.__baishunGetConfigCallback = null;
        }
        if (window.__baishunLastJsCallback) {
          invokeCallbackPath(window.__baishunLastJsCallback);
        }
        if (typeof window.onBaishunConfig === 'function') {
          window.onBaishunConfig(config);
        }
        if (typeof window.dispatchEvent === 'function' && typeof CustomEvent === 'function') {
          window.dispatchEvent(new CustomEvent('baishunConfig', { detail: config }));
        }
        if (typeof document !== 'undefined' && typeof document.dispatchEvent === 'function' && typeof CustomEvent === 'function') {
          document.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);
        }
      })();
    ''';
  }
}