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) {
    switch (this.provider) {
      case "claude":
      case "glm":
      case "kimi":
      case "minimax":
        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 "minimax":
        headers["x-api-key"] = credentials.apiKey;
        break;
      default:
        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)
    };

    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 };
  }
}

export default DefaultExecutor;