import { authFetch, buildApiError, buildApiUrl } from './client';

const normalizeDigits = (value: string) =>
  value
    .replace(/[۰-۹]/g, (digit) => String("۰۱۲۳۴۵۶۷۸۹".indexOf(digit)))
    .replace(/[٠-٩]/g, (digit) => String("٠١٢٣٤٥٦٧٨٩".indexOf(digit)))

// --- Auth Endpoints ---

export const loginWithPassword = async (mobile: string, password: string) => {
  const normalizedMobile = normalizeDigits(mobile)
  const response = await authFetch('/api/users/login/', {
    method: 'POST',
    body: JSON.stringify({ mobile: normalizedMobile, password })
  });
  if (!response.ok) throw await buildApiError(response);
  return response.json();
};

export interface SendOtpResponse {
  detail: string
  expires_in_seconds: number
  expires_at?: string | null
}

export const sendOtp = async (mobile: string, mode: string): Promise<SendOtpResponse> => {
  const normalizedMobile = normalizeDigits(mobile)
  const response = await authFetch('/api/users/otp/send/', {
    method: 'POST',
    body: JSON.stringify({ mobile: normalizedMobile, mode })
  });
  if (!response.ok) throw await buildApiError(response);
  return response.json();
};

export const loginWithOtp = async (mobile: string, otp: string) => {
  const normalizedMobile = normalizeDigits(mobile)
  const normalizedOtp = normalizeDigits(otp)
  const response = await authFetch('/api/users/otp/login/', {
    method: 'POST',
    body: JSON.stringify({ mobile: normalizedMobile, code: normalizedOtp })
  });
  if (!response.ok) throw await buildApiError(response);
  return response.json();
};

export const registerWithOtp = async (
  mobile: string,
  code: string,
  password: string,
  re_password: string,
  first_name = "",
  last_name = "",
) => {
  const normalizedMobile = normalizeDigits(mobile)
  const normalizedCode = normalizeDigits(code)
  const response = await authFetch("/api/users/register/", {
    method: "POST",
    body: JSON.stringify({
      mobile: normalizedMobile,
      code: normalizedCode,
      password,
      re_password,
      first_name,
      last_name,
    }),
  })
  if (!response.ok) throw await buildApiError(response)
  return response.json()
}

export const resetPasswordWithOtp = async (
  mobile: string,
  code: string,
  password: string,
  re_password: string,
) => {
  const normalizedMobile = normalizeDigits(mobile)
  const normalizedCode = normalizeDigits(code)
  const response = await authFetch("/api/users/password/reset/", {
    method: "POST",
    body: JSON.stringify({
      mobile: normalizedMobile,
      code: normalizedCode,
      password,
      re_password,
    }),
  })
  if (!response.ok) throw await buildApiError(response)
  return response.json()
}

export const changePassword = async (
  old_password: string,
  new_password: string,
  re_password: string,
) => {
  const response = await authFetch("/api/users/password/change/", {
    method: "PATCH",
    body: JSON.stringify({ old_password, new_password, re_password }),
  })
  if (!response.ok) throw await buildApiError(response)
  return response.json()
}

export const startGoogleLogin = () => {
  window.location.assign(buildApiUrl("/api/users/oauth/google/start/"));
};

export type GoogleOAuthFlowResponse =
  | {
      status: "authenticated";
      access: string;
      refresh: string;
    }
  | {
      status: "collect_mobile";
      email: string;
      first_name: string;
      last_name: string;
      avatar_url: string;
      resolution: "new_account" | "existing_email_claim";
      mobile_hint?: string | null;
    }
  | {
      status: "claim_required";
      mobile: string;
      detail?: string;
      email: string;
      resolution: "new_account" | "existing_email_claim" | "existing_mobile_claim";
      mobile_hint?: string | null;
    };

export const getGoogleOAuthFlow = async (flow: string): Promise<GoogleOAuthFlowResponse> => {
  const response = await authFetch(`/api/users/oauth/google/flow/?flow=${encodeURIComponent(flow)}`, {
    method: "GET",
  });
  if (!response.ok) throw await buildApiError(response);
  return response.json();
};

export const completeGoogleOAuthSignup = async (
  flow: string,
  mobile: string,
): Promise<GoogleOAuthFlowResponse> => {
  const normalizedMobile = normalizeDigits(mobile)
  const response = await authFetch("/api/users/oauth/google/complete/", {
    method: "POST",
    body: JSON.stringify({ flow, mobile: normalizedMobile }),
  });
  if (!response.ok) throw await buildApiError(response);
  return response.json();
};

export const sendGoogleOAuthClaimOtp = async (flow: string) => {
  const response = await authFetch("/api/users/oauth/google/claim/send-otp/", {
    method: "POST",
    body: JSON.stringify({ flow }),
  });
  if (!response.ok) throw await buildApiError(response);
  return response.json();
};

export const verifyGoogleOAuthClaim = async (
  flow: string,
  code: string,
): Promise<GoogleOAuthFlowResponse> => {
  const normalizedCode = normalizeDigits(code)
  const response = await authFetch("/api/users/oauth/google/claim/verify/", {
    method: "POST",
    body: JSON.stringify({ flow, code: normalizedCode }),
  });
  if (!response.ok) throw await buildApiError(response);
  return response.json();
};

export const logoutUser = async (refreshToken: string) => {
  const response = await authFetch('/api/users/logout/', {
    method: 'POST',
    body: JSON.stringify({ refresh: refreshToken })
  });
  if (!response.ok) throw new Error("Logout failed");
  return response.json();
};

// --- Profile Endpoints ---

export const getUserProfile = async () => {
  const response = await authFetch('/api/users/me/', {
    method: 'GET'
  });
  if (!response.ok) throw new Error('Failed to fetch profile');
  return response.json();
};

export const updateUserProfile = async (data: Record<string, string>) => {
  const response = await authFetch('/api/users/me/', {
    method: 'PATCH',
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error('Failed to update profile');
  return response.json();
};

export const updateProfilePicture = async (file: File) => {
  const formData = new FormData();
  formData.append('profile_picture', file);

  const response = await authFetch('/api/users/profile/picture/', {
    method: 'POST',
    body: formData
  });
  if (!response.ok) throw new Error('Failed to update profile picture');
  return response.json();
};

export const removeProfilePicture = async () => {
  const response = await authFetch(`/api/users/profile/picture/`, {
    method: 'DELETE',
  });
  if (!response.ok) throw new Error('Failed to remove profile picture');
  return response.json();
};


export interface SearchedUser {
  id: number | string;
  first_name: string;
  last_name: string;
  mobile: string;
  profile_picture: string | null;
}

export const searchUserByExactMobile = async (mobile: string): Promise<SearchedUser | null> => {
  try {
    const response = await authFetch(`/api/users/search/?mobile=${encodeURIComponent(normalizeDigits(mobile))}`);
    if (!response.ok) return null; // Returns null on 404 or other errors
    return await response.json();
  } catch (error) {
    return null;
  }
};