// TypeScript API client for AI Voicebot server
import { components } from "./api-types";
import { base } from "./Common";

// Re-export commonly used types from the generated schema
export type LobbyModel = components["schemas"]["LobbyModel"];
export type LobbyListItem = components["schemas"]["LobbyListItem"];
export type LobbyCreateData = components["schemas"]["LobbyCreateData"];
export type NamePasswordRecord = components["schemas"]["NamePasswordRecord"];

// Type aliases for API methods
export type AdminNamesResponse = components["schemas"]["AdminNamesResponse"];
export type AdminActionResponse = components["schemas"]["AdminActionResponse"];
export type AdminSetPassword = components["schemas"]["AdminSetPassword"];
export type AdminClearPassword = components["schemas"]["AdminClearPassword"];
export type HealthResponse = components["schemas"]["HealthResponse"];
export type LobbiesResponse = components["schemas"]["LobbiesResponse"];
export type SessionResponse = components["schemas"]["SessionResponse"];
export type LobbyCreateRequest = components["schemas"]["LobbyCreateRequest"];
export type LobbyCreateResponse = components["schemas"]["LobbyCreateResponse"];

// Bot Provider Types (manually defined until API types are regenerated)
export interface BotInfoModel {
  name: string;
  description: string;
}

export interface BotProviderModel {
  provider_id: string;
  base_url: string;
  name: string;
  description: string;
  registered_at: number;
  last_seen: number;
}

export interface BotProviderListResponse {
  providers: BotProviderModel[];
}

export interface BotListResponse {
  bots: BotInfoModel[];
  providers: Record<string, string>;
}

export interface BotJoinLobbyRequest {
  bot_name: string;
  lobby_id: string;
  nick?: string;
  provider_id?: string;
}

export interface BotJoinLobbyResponse {
  status: string;
  bot_name: string;
  run_id: string;
  provider_id: string;
}

export interface BotLeaveLobbyRequest {
  session_id: string;
}

export interface BotLeaveLobbyResponse {
  status: string;
  session_id: string;
  run_id?: string;
}

export class ApiError extends Error {
  constructor(public status: number, public statusText: string, public data?: any) {
    super(`HTTP ${status}: ${statusText}`);
    this.name = "ApiError";
  }
}

export class ApiClient {
  private baseURL: string;
  private defaultHeaders: Record<string, string>;

  constructor(baseURL?: string) {
    // Use the current window location instead of localhost, just like WebSocket connections
    const defaultBaseURL =
      typeof window !== "undefined" ? `${window.location.protocol}//${window.location.host}` : "http://localhost:8001";

    this.baseURL = baseURL || process.env.REACT_APP_API_URL || defaultBaseURL;
    this.defaultHeaders = {};
  }

  /**
   * Construct API path using PUBLIC_URL environment variable
   * Replaces hardcoded /ai-voicebot prefix with dynamic base from environment
   */
  private getApiPath(schemaPath: string): string {
    // Replace the hardcoded /ai-voicebot prefix with the dynamic base
    return schemaPath.replace("/ai-voicebot", base);
  }

  private async request<T>(
    path: string,
    options: {
      method: string;
      body?: any;
      params?: Record<string, string>;
    }
  ): Promise<T> {
    const url = new URL(path, this.baseURL);

    if (options.params) {
      Object.entries(options.params).forEach(([key, value]) => {
        url.searchParams.append(key, value);
      });
    }

    const requestInit: RequestInit = {
      method: options.method,
      headers: {
        "Content-Type": "application/json",
        ...this.defaultHeaders,
      },
    };

    if (options.body && options.method !== "GET") {
      requestInit.body = JSON.stringify(options.body);
    }

    const response = await fetch(url.toString(), requestInit);

    if (!response.ok) {
      let errorData;
      // Clone the response before trying to read it, in case JSON parsing fails
      const responseClone = response.clone();
      try {
        errorData = await response.json();
      } catch {
        try {
          errorData = await responseClone.text();
        } catch {
          errorData = `HTTP ${response.status}: ${response.statusText}`;
        }
      }
      throw new ApiError(response.status, response.statusText, errorData);
    }

    const contentType = response.headers.get("content-type");
    if (contentType && contentType.includes("application/json")) {
      return response.json();
    }

    return response.text() as unknown as T;
  }

  // Admin API methods
  async adminListNames(): Promise<AdminNamesResponse> {
    return this.request<AdminNamesResponse>(this.getApiPath("/ai-voicebot/api/admin/names"), { method: "GET" });
  }

  async adminSetPassword(data: AdminSetPassword): Promise<AdminActionResponse> {
    return this.request<AdminActionResponse>(this.getApiPath("/ai-voicebot/api/admin/set_password"), {
      method: "POST",
      body: data,
    });
  }

  async adminClearPassword(data: AdminClearPassword): Promise<AdminActionResponse> {
    return this.request<AdminActionResponse>(this.getApiPath("/ai-voicebot/api/admin/clear_password"), {
      method: "POST",
      body: data,
    });
  }

  // Health check
  async healthCheck(): Promise<HealthResponse> {
    return this.request<HealthResponse>(this.getApiPath("/ai-voicebot/api/health"), { method: "GET" });
  }

  // Session methods
  async getSession(): Promise<SessionResponse> {
    return this.request<SessionResponse>(this.getApiPath("/ai-voicebot/api/session"), { method: "GET" });
  }

  // Lobby methods
  async getLobbies(): Promise<LobbiesResponse> {
    return this.request<LobbiesResponse>(this.getApiPath("/ai-voicebot/api/lobby"), { method: "GET" });
  }

  async createLobby(sessionId: string, data: LobbyCreateRequest): Promise<LobbyCreateResponse> {
    return this.request<LobbyCreateResponse>(this.getApiPath(`/ai-voicebot/api/lobby/${sessionId}`), {
      method: "POST",
      body: data,
    });
  }

  // Bot Provider methods
  async getBotProviders(): Promise<BotProviderListResponse> {
    return this.request<BotProviderListResponse>(this.getApiPath("/ai-voicebot/api/bots/providers"), { method: "GET" });
  }

  async getAvailableBots(): Promise<BotListResponse> {
    return this.request<BotListResponse>(this.getApiPath("/ai-voicebot/api/bots"), { method: "GET" });
  }

  async requestBotJoinLobby(botName: string, request: BotJoinLobbyRequest): Promise<BotJoinLobbyResponse> {
    return this.request<BotJoinLobbyResponse>(
      this.getApiPath(`/ai-voicebot/api/bots/${encodeURIComponent(botName)}/join`),
      {
        method: "POST",
        body: request,
      }
    );
  }

  async requestBotLeaveLobby(request: BotLeaveLobbyRequest): Promise<BotLeaveLobbyResponse> {
    return this.request<BotLeaveLobbyResponse>(this.getApiPath("/ai-voicebot/api/bots/leave"), {
      method: "POST",
      body: request,
    });
  }

  // Auto-generated endpoints will be added here by update-api-client.js
  // DO NOT MANUALLY EDIT BELOW THIS LINE

  // Auto-generated endpoints
  async lobbyCreate(session_id: string, data: any): Promise<any> {
    return this.request<any>(this.getApiPath(`/ai-voicebot/api/lobby/${session_id}`), { method: "POST", body: data });
  }
}

// API Evolution Detection System
interface ApiEndpoint {
  path: string;
  method: string;
  implemented: boolean;
}

class ApiEvolutionChecker {
  private static instance: ApiEvolutionChecker;
  private checkedOnce = false;
  
  static getInstance(): ApiEvolutionChecker {
    if (!this.instance) {
      this.instance = new ApiEvolutionChecker();
    }
    return this.instance;
  }

  private getImplementedEndpoints(): Set<string> {
    // Define all endpoints that are currently implemented in ApiClient
    // This list is automatically updated by update-api-client.js
    return new Set([
      'GET:/ai-voicebot/api/admin/names',
      'GET:/ai-voicebot/api/bots',
      'GET:/ai-voicebot/api/bots/providers',
      'GET:/ai-voicebot/api/health',
      'GET:/ai-voicebot/api/lobby',
      'GET:/ai-voicebot/api/session',
      'POST:/ai-voicebot/api/admin/clear_password',
      'POST:/ai-voicebot/api/admin/set_password',
      'POST:/ai-voicebot/api/lobby/{sessionId}',
      'POST:/ai-voicebot/api/lobby/{session_id}'
    ]);
  }

  private getAvailableEndpoints(): ApiEndpoint[] {
    // Extract all endpoints from the generated paths type
    const endpoints: ApiEndpoint[] = [];
    const implementedSet = this.getImplementedEndpoints();
    
    // Type-safe extraction of paths from the generated schema
    const pathKeys = [
      '/ai-voicebot/api/admin/names',
      '/ai-voicebot/api/admin/set_password', 
      '/ai-voicebot/api/admin/clear_password',
      '/ai-voicebot/api/health',
      '/ai-voicebot/api/session',
      '/ai-voicebot/api/lobby',
      '/ai-voicebot/api/lobby/{session_id}',
      '/ai-voicebot/{path}' // Generic catch-all, we'll skip this one
    ] as const;

    pathKeys.forEach(path => {
      if (path === '/ai-voicebot/{path}') {
        // Skip the generic proxy endpoint
        return;
      }
      
      // Check each HTTP method that might be available for this path
      const possibleMethods = ['get', 'post', 'put', 'delete', 'patch'] as const;
      
      possibleMethods.forEach(method => {
        const endpointKey = `${method.toUpperCase()}:${path}`;
        const implemented = implementedSet.has(endpointKey);
        
        // We can't directly check if the method exists at runtime due to TypeScript compilation,
        // but we know from our grep search what exists. Let's be more explicit:
        const knownEndpoints: Record<string, string[]> = {
          '/ai-voicebot/api/admin/names': ['GET'],
          '/ai-voicebot/api/admin/set_password': ['POST'],
          '/ai-voicebot/api/admin/clear_password': ['POST'],
          '/ai-voicebot/api/health': ['GET'],
          '/ai-voicebot/api/session': ['GET'],
          '/ai-voicebot/api/lobby': ['GET'],
          '/ai-voicebot/api/lobby/{session_id}': ['POST']
        };
        
        const pathMethods = knownEndpoints[path];
        if (pathMethods && pathMethods.includes(method.toUpperCase())) {
          endpoints.push({
            path,
            method: method.toUpperCase(),
            implemented
          });
        }
      });
    });

    return endpoints;
  }

  checkForNewEndpoints(): void {
    if (this.checkedOnce) {
      return; // Only check once per session to avoid spam
    }
    
    this.checkedOnce = true;
    
    try {
      const endpoints = this.getAvailableEndpoints();
      const unimplemented = endpoints.filter(ep => !ep.implemented);
      
      if (unimplemented.length > 0) {
        console.group('🚨 API Evolution Warning');
        console.warn(
          `Found ${unimplemented.length} API endpoints that are not implemented in ApiClient:`
        );
        
        unimplemented.forEach(endpoint => {
          console.warn(`  • ${endpoint.method} ${endpoint.path}`);
        });
        
        console.warn('Consider updating api-client.ts to implement these endpoints.');
        console.warn('Available types can be found in api-types.ts');
        console.groupEnd();
      } else {
        console.info('✅ All available API endpoints are implemented in ApiClient');
      }

      // Also check for potential parameter changes by looking at method signatures
      this.checkForParameterChanges();
      
    } catch (error) {
      console.warn('Failed to check for API evolution:', error);
    }
  }

  private checkForParameterChanges(): void {
    // This is a simpler check - we could extend this to compare parameter schemas
    // For now, we'll just remind developers to check if their implementation matches the schema
    console.info('💡 Tip: Regularly compare your method implementations with the generated types in api-types.ts to ensure parameter compatibility');
  }

  // Method to manually trigger a fresh check (useful for development)
  recheckEndpoints(): void {
    this.checkedOnce = false;
    this.checkForNewEndpoints();
  }
}

// Export the checker for manual use if needed
export const apiEvolutionChecker = ApiEvolutionChecker.getInstance();

// Utility functions for development
export const devUtils = {
  /**
   * Manually check for API evolution and log results
   */
  async checkApiEvolution() {
    if (process.env.NODE_ENV !== 'development') {
      console.warn('API evolution checking is only available in development mode');
      return;
    }
    
    try {
      const { advancedApiChecker } = await import('./api-evolution-checker');
      const evolution = await advancedApiChecker.checkSchemaEvolution();
      
      console.group('🔍 Manual API Evolution Check');
      console.log('Unimplemented endpoints:', evolution.unimplementedEndpoints.length);
      console.log('New endpoints:', evolution.newEndpoints.length);
      console.log('Schema changed:', evolution.hasChangedEndpoints);
      
      if (evolution.unimplementedEndpoints.length > 0) {
        console.log('\nImplementation stubs:');
        console.log(advancedApiChecker.generateImplementationStubs(evolution.unimplementedEndpoints));
      }
      
      console.groupEnd();
      return evolution;
    } catch (error) {
      console.error('Failed to check API evolution:', error);
      return null;
    }
  },

  /**
   * Force a recheck of endpoints (bypasses the "once per session" limitation)
   */
  recheckEndpoints() {
    apiEvolutionChecker.recheckEndpoints();
  }
};

// Default client instance
export const apiClient = new ApiClient();

// Convenience API namespaces
export const adminApi = {
  listNames: () => apiClient.adminListNames(),
  setPassword: (data: AdminSetPassword) => apiClient.adminSetPassword(data),
  clearPassword: (data: AdminClearPassword) => apiClient.adminClearPassword(data),
};

export const healthApi = { check: () => apiClient.healthCheck() };
export const lobbiesApi = { getAll: () => apiClient.getLobbies() };
export const sessionsApi = {
  getCurrent: () => apiClient.getSession(),
  createLobby: (sessionId: string, data: LobbyCreateRequest) => apiClient.createLobby(sessionId, data),
};

export const botsApi = {
  getProviders: () => apiClient.getBotProviders(),
  getAvailable: () => apiClient.getAvailableBots(),
  requestJoinLobby: (botName: string, request: BotJoinLobbyRequest) => apiClient.requestBotJoinLobby(botName, request),
};

// Automatically check for API evolution when this module is loaded
// This will warn developers if new endpoints are available but not implemented
if (process.env.NODE_ENV === 'development') {
  // Import the advanced checker dynamically to avoid circular dependencies
  import('./api-evolution-checker').then(({ advancedApiChecker }) => {
    // Run the check after a short delay to ensure all modules are loaded
    setTimeout(async () => {
      try {
        const evolution = await advancedApiChecker.checkSchemaEvolution();
        
        if (evolution.unimplementedEndpoints.length > 0 || evolution.hasNewEndpoints) {
          console.group('🚨 API Evolution Detection');
          
          if (evolution.hasNewEndpoints && evolution.newEndpoints.length > 0) {
            console.warn('🆕 New API endpoints detected:');
            evolution.newEndpoints.forEach(ep => {
              console.warn(`  • ${ep.method} ${ep.path} (${ep.operationId})`);
            });
          }
          
          if (evolution.unimplementedEndpoints.length > 0) {
            console.warn('⚠️  Unimplemented API endpoints:');
            evolution.unimplementedEndpoints.forEach(ep => {
              console.warn(`  • ${ep.method} ${ep.path}`);
            });
          }
          
          if (evolution.hasChangedEndpoints) {
            console.warn('🔄 API schema has changed - check for parameter updates');
          }
          
          console.groupCollapsed('💡 Implementation suggestions:');
          console.log('Add these methods to ApiClient:');
          console.log(advancedApiChecker.generateImplementationStubs(evolution.unimplementedEndpoints));
          console.groupEnd();
          
          console.groupEnd();
        } else {
          console.info('✅ All API endpoints are implemented');
        }
      } catch (error) {
        console.warn('API evolution check failed:', error);
        // Fallback to simple checker
        apiEvolutionChecker.checkForNewEndpoints();
      }
    }, 1000);
  });
}