import axios from "axios";

const api = axios.create({
  baseURL: import.meta.env.VITE_API_URL || "https://habib-analyst-email-agent-api.hf.space/api",
  headers: { "Content-Type": "application/json" },
  timeout: 180000,
});

// ─── Token Management ──────────────────────────────────────────────
let _token = null;

export function setAuthToken(token) {
  _token = token;
  if (token) {
    sessionStorage.setItem("session_token", token);
  } else {
    sessionStorage.removeItem("session_token");
  }
}

export function getAuthToken() {
  if (!_token) {
    _token = sessionStorage.getItem("session_token");
  }
  return _token;
}

export function clearAuthToken() {
  _token = null;
  sessionStorage.removeItem("session_token");
}

// ─── Attach JWT to every request ───────────────────────────────────
api.interceptors.request.use((config) => {
  const token = getAuthToken();
  if (token) {
    config.headers.Authorization = `Bearer ${token}`;
  }
  return config;
});

// ─── Handle 401 responses globally ─────────────────────────────────
api.interceptors.response.use(
  (response) => response,
  (error) => {
    if (error.response?.status === 401) {
      // Don't redirect if we're already on auth routes
      const url = error.config?.url || "";
      if (!url.includes("/auth/") && !url.includes("/admin/login")) {
        clearAuthToken();
        // Dispatch a custom event so AuthContext can react
        window.dispatchEvent(new CustomEvent("auth:expired"));
      }
    }
    return Promise.reject(error);
  }
);

export const authAPI = {
  getStatus: () => api.get("/auth/status"),
  startAuth: () => api.get("/auth/gmail"),
  disconnect: () => api.post("/auth/disconnect"),
};

export const adminAPI = {
  login: (email, password) => api.post("/admin/login", { email, password }),
  getStats: () => api.get("/admin/stats"),
  getUsers: () => api.get("/admin/users"),
  userAction: (email, action) => api.post("/admin/users/action", { email, action }),
};

export const quotaAPI = {
  getStatus: () => api.get("/quota/status"),
  checkDuplicate: (recipientEmail) => api.get(`/quota/check-duplicate/${recipientEmail}`),
};

export const emailAPI = {
  loadTemplate: () => api.post("/email/load-template"),
  applyTemplate: (recipientInput) =>
    api.post("/email/apply-template", { professor_input: recipientInput }),
  verify: (toEmail, subject, htmlBody) =>
    api.post("/email/verify", { to_email: toEmail, subject, html_body: htmlBody }),
  send: (toEmail, subject, htmlBody) =>
    api.post("/email/send", { to_email: toEmail, subject, html_body: htmlBody }),
  getAttachments: () => api.get("/email/attachments"),
  uploadAttachment: (file) => {
    const form = new FormData();
    form.append("file", file);
    return api.post("/email/attachments/upload", form, {
      headers: { "Content-Type": "multipart/form-data" },
    });
  },
  deleteAttachment: (filename) => api.delete(`/email/attachments/${filename}`),
  contactSales: (data) => api.post("/email/contact-sales", data),
};

export const batchAPI = {
  uploadCSV: (file) => {
    const form = new FormData();
    form.append("file", file);
    return api.post("/batch/upload-csv", form, {
      headers: { "Content-Type": "multipart/form-data" },
    });
  },
  extractEmails: (text) =>
    api.post("/batch/extract-emails", { text }),
  scrapeFaculty: (url) =>
    api.post("/batch/scrape-faculty", { url }, { timeout: 120000 }),
  start: (recipientList, mode = "manual", delayMin = 15, delayMax = 45) =>
    api.post("/batch/start", {
      professor_list: recipientList,
      mode,
      delay_min: delayMin,
      delay_max: delayMax,
    }),
  getQueue: () => api.get("/batch/queue"),
  generate: (index) => api.post(`/batch/generate/${index}`),
  send: (index) => api.post(`/batch/send/${index}`),
  skip: (index) => api.post(`/batch/skip/${index}`),
  autoRun: () => api.post("/batch/auto-run", {}, { timeout: 3600000 }),
  stop: () => api.post("/batch/stop"),
  clear: () => api.post("/batch/clear"),
};

export default api;