import { BaseExecutor } from "./base.js";
import { PROVIDERS, OAUTH_ENDPOINTS } from "../config/constants.js";

export class DefaultExecutor extends BaseExecutor {
  constructor(provider) {
    super(provider, PROVIDERS[provider] || PROVIDERS.openai);
  }

  buildUrl(model, stream, urlIndex = 0, credentials = null) {
    if (this.provider?.startsWith?.("openai-compatible-")) {
      const baseUrl = credentials?.providerSpecificData?.baseUrl || "https://api.openai.com/v1";
      const normalized = baseUrl.replace(/\/$/, "");
      const path = this.provider.includes("responses") ? "/responses" : "/chat/completions";
      return `${normalized}${path}`;
    }
    if (this.provider?.startsWith?.("anthropic-compatible-")) {
      const baseUrl = credentials?.providerSpecificData?.baseUrl || "https://api.anthropic.com/v1";
      const normalized = baseUrl.replace(/\/$/, "");
      return `${normalized}/messages`;
    }
    switch (this.provider) {
      case "claude":
      case "glm":
      case "kimi":
      case "kimi-coding":
      case "cline":
      case "minimax":
      case "minimax-cn":
        return `${this.config.baseUrl}?beta=true`;
      case "gemini":
        return `${this.config.baseUrl}/${model}:${stream ? "streamGenerateContent?alt=sse" : "generateContent"}`;
      default:
        return this.config.baseUrl;
    }
  }

  buildHeaders(credentials, stream = true) {
    const headers = { "Content-Type": "application/json", ...this.config.headers };

    switch (this.provider) {
      case "gemini":
        credentials.apiKey ? headers["x-goog-api-key"] = credentials.apiKey : headers["Authorization"] = `Bearer ${credentials.accessToken}`;
        break;
      case "claude":
        credentials.apiKey ? headers["x-api-key"] = credentials.apiKey : headers["Authorization"] = `Bearer ${credentials.accessToken}`;
        break;
      case "glm":
      case "kimi":
      case "kimi-coding":
      case "cline":
      case "minimax":
      case "minimax-cn":
        headers["x-api-key"] = credentials.apiKey || credentials.accessToken;
        break;
      default:
        if (this.provider?.startsWith?.("anthropic-compatible-")) {
          if (credentials.apiKey) {
            headers["x-api-key"] = credentials.apiKey;
          } else if (credentials.accessToken) {
            headers["Authorization"] = `Bearer ${credentials.accessToken}`;
          }
          if (!headers["anthropic-version"]) {
            headers["anthropic-version"] = "2023-06-01";
          }
        } else {
          headers["Authorization"] = `Bearer ${credentials.apiKey || credentials.accessToken}`;
        }
    }

    if (stream) headers["Accept"] = "text/event-stream";
    return headers;
  }

  async refreshCredentials(credentials, log) {
    if (!credentials.refreshToken) return null;

    const refreshers = {
      claude: () => this.refreshWithJSON(OAUTH_ENDPOINTS.anthropic.token, { grant_type: "refresh_token", refresh_token: credentials.refreshToken, client_id: PROVIDERS.claude.clientId }),
      codex: () => this.refreshWithForm(OAUTH_ENDPOINTS.openai.token, { grant_type: "refresh_token", refresh_token: credentials.refreshToken, client_id: PROVIDERS.codex.clientId, scope: "openid profile email offline_access" }),
      qwen: () => this.refreshWithForm(OAUTH_ENDPOINTS.qwen.token, { grant_type: "refresh_token", refresh_token: credentials.refreshToken, client_id: PROVIDERS.qwen.clientId }),
      iflow: () => this.refreshIflow(credentials.refreshToken),
      gemini: () => this.refreshGoogle(credentials.refreshToken),
      kiro: () => this.refreshKiro(credentials.refreshToken),
      cline: () => this.refreshCline(credentials.refreshToken),
      "kimi-coding": () => this.refreshKimiCoding(credentials.refreshToken),
      kilocode: () => this.refreshKilocode(credentials.refreshToken)
    };

    const refresher = refreshers[this.provider];
    if (!refresher) return null;

    try {
      const result = await refresher();
      if (result) log?.info?.("TOKEN", `${this.provider} refreshed`);
      return result;
    } catch (error) {
      log?.error?.("TOKEN", `${this.provider} refresh error: ${error.message}`);
      return null;
    }
  }

  async refreshWithJSON(url, body) {
    const response = await fetch(url, {
      method: "POST",
      headers: { "Content-Type": "application/json", "Accept": "application/json" },
      body: JSON.stringify(body)
    });
    if (!response.ok) return null;
    const tokens = await response.json();
    return { accessToken: tokens.access_token, refreshToken: tokens.refresh_token || body.refresh_token, expiresIn: tokens.expires_in };
  }

  async refreshWithForm(url, params) {
    const response = await fetch(url, {
      method: "POST",
      headers: { "Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json" },
      body: new URLSearchParams(params)
    });
    if (!response.ok) return null;
    const tokens = await response.json();
    return { accessToken: tokens.access_token, refreshToken: tokens.refresh_token || params.refresh_token, expiresIn: tokens.expires_in };
  }

  async refreshIflow(refreshToken) {
    const basicAuth = btoa(`${PROVIDERS.iflow.clientId}:${PROVIDERS.iflow.clientSecret}`);
    const response = await fetch(OAUTH_ENDPOINTS.iflow.token, {
      method: "POST",
      headers: { "Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json", "Authorization": `Basic ${basicAuth}` },
      body: new URLSearchParams({ grant_type: "refresh_token", refresh_token: refreshToken, client_id: PROVIDERS.iflow.clientId, client_secret: PROVIDERS.iflow.clientSecret })
    });
    if (!response.ok) return null;
    const tokens = await response.json();
    return { accessToken: tokens.access_token, refreshToken: tokens.refresh_token || refreshToken, expiresIn: tokens.expires_in };
  }

  async refreshGoogle(refreshToken) {
    const response = await fetch(OAUTH_ENDPOINTS.google.token, {
      method: "POST",
      headers: { "Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json" },
      body: new URLSearchParams({ grant_type: "refresh_token", refresh_token: refreshToken, client_id: this.config.clientId, client_secret: this.config.clientSecret })
    });
    if (!response.ok) return null;
    const tokens = await response.json();
    return { accessToken: tokens.access_token, refreshToken: tokens.refresh_token || refreshToken, expiresIn: tokens.expires_in };
  }

  async refreshKiro(refreshToken) {
    const response = await fetch(PROVIDERS.kiro.tokenUrl, {
      method: "POST",
      headers: { "Content-Type": "application/json", "Accept": "application/json", "User-Agent": "kiro-cli/1.0.0" },
      body: JSON.stringify({ refreshToken })
    });
    if (!response.ok) return null;
    const tokens = await response.json();
    return { accessToken: tokens.accessToken, refreshToken: tokens.refreshToken || refreshToken, expiresIn: tokens.expiresIn };
  }

  async refreshCline(refreshToken) {
    console.log('[DEBUG] Refreshing Cline token, refreshToken length:', refreshToken?.length);
    const response = await fetch("https://api.cline.bot/api/v1/auth/refresh", {
      method: "POST",
      headers: { "Content-Type": "application/json", "Accept": "application/json" },
      body: JSON.stringify({ refreshToken, grantType: "refresh_token", clientType: "extension" })
    });
    console.log('[DEBUG] Cline refresh response status:', response.status);
    if (!response.ok) {
      const errorText = await response.text();
      console.log('[DEBUG] Cline refresh error:', errorText);
      return null;
    }
    const payload = await response.json();
    console.log('[DEBUG] Cline refresh payload:', JSON.stringify(payload).substring(0, 200));
    const data = payload?.data || payload;
    const expiresAtIso = data?.expiresAt;
    const expiresIn = expiresAtIso ? Math.max(1, Math.floor((new Date(expiresAtIso).getTime() - Date.now()) / 1000)) : undefined;
    console.log('[DEBUG] Cline refresh success, expiresIn:', expiresIn);
    return { accessToken: data?.accessToken, refreshToken: data?.refreshToken || refreshToken, expiresIn };
  }

  async refreshKimiCoding(refreshToken) {
    const response = await fetch("https://auth.kimi.com/api/oauth/token", {
      method: "POST",
      headers: { "Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json" },
      body: new URLSearchParams({ grant_type: "refresh_token", refresh_token: refreshToken, client_id: "17e5f671-d194-4dfb-9706-5516cb48c098" })
    });
    if (!response.ok) return null;
    const tokens = await response.json();
    return { accessToken: tokens.access_token, refreshToken: tokens.refresh_token || refreshToken, expiresIn: tokens.expires_in };
  }

  async refreshKilocode(refreshToken) {
    // Kilocode uses device code flow, no refresh token support
    return null;
  }
}

export default DefaultExecutor;
