const API_BASE_URL = "http://localhost:8000/api";

let authToken = null;
let tokenRefreshTimer = null;

export function setToken(token) {
  authToken = token;
  localStorage.setItem("authToken", token);
  scheduleTokenRefresh();
}

export function getToken() {
  if (!authToken) {
    authToken = localStorage.getItem("authToken");
  }
  return authToken;
}

export function clearToken() {
  authToken = null;
  localStorage.removeItem("authToken");
  if (tokenRefreshTimer) {
    clearTimeout(tokenRefreshTimer);
  }
}

function scheduleTokenRefresh() {
  // Refresh token 5 minutes before expiry (assuming 24h token)
  const refreshIn = 23 * 60 * 60 * 1000; // 23 hours
  if (tokenRefreshTimer) {
    clearTimeout(tokenRefreshTimer);
  }
  tokenRefreshTimer = setTimeout(async () => {
    try {
      // Re-login would require stored credentials
      // For now, just notify user to re-login
      console.warn("Token expiring soon, please re-login");
    } catch (error) {
      console.error("Token refresh failed:", error);
    }
  }, refreshIn);
}

async function request(endpoint, options = {}) {
  const url = `${API_BASE_URL}${endpoint}`;
  const headers = {
    "Content-Type": "application/json",
    ...options.headers,
  };

  const token = getToken();
  if (token) {
    headers["Authorization"] = `Bearer ${token}`;
  }

  const response = await fetch(url, {
    ...options,
    headers,
  });

  if (response.status === 401) {
    const error = await response.json();
    if (error.detail?.error === "token_expired") {
      clearToken();
      window.electronAPI.navigate("login");
      throw new Error("Session expired, please login again");
    }
    throw new Error(error.detail || "Unauthorized");
  }

  if (!response.ok) {
    const error = await response.json().catch(() => ({}));
    throw new Error(error.detail || `HTTP error ${response.status}`);
  }

  // Handle blob responses for export
  if (options.responseType === "blob") {
    return response.blob();
  }

  return response.json();
}

// Auth API
export async function login(email, password) {
  const data = await request("/login", {
    method: "POST",
    body: JSON.stringify({ email, password }),
  });
  setToken(data.token);
  localStorage.setItem("userEmail", data.email);
  localStorage.setItem("userRole", data.role);
  return data;
}

export async function getMe() {
  return request("/me");
}

// Meetings API
export async function getMeetings() {
  return request("/meetings");
}

export async function getMeeting(id) {
  return request(`/meetings/${id}`);
}

export async function createMeeting(meeting) {
  return request("/meetings", {
    method: "POST",
    body: JSON.stringify(meeting),
  });
}

export async function updateMeeting(id, meeting) {
  return request(`/meetings/${id}`, {
    method: "PUT",
    body: JSON.stringify(meeting),
  });
}

export async function deleteMeeting(id) {
  return request(`/meetings/${id}`, {
    method: "DELETE",
  });
}

export async function updateActionItem(meetingId, actionId, data) {
  return request(`/meetings/${meetingId}/actions/${actionId}`, {
    method: "PUT",
    body: JSON.stringify(data),
  });
}

// AI API
export async function summarizeTranscript(transcript) {
  return request("/ai/summarize", {
    method: "POST",
    body: JSON.stringify({ transcript }),
  });
}

// Export API
export async function exportMeeting(id) {
  return request(`/meetings/${id}/export`, {
    responseType: "blob",
  });
}