import i18n from "../i18n";

export const API_BASE_URL = import.meta.env.VITE_API_URL || 'http://localhost:8000';
export const RESOURCES_BASE_URL = API_BASE_URL.replace(/\/api\/?$/, '');
console.log("DEBUG: Resources will be loaded from:", RESOURCES_BASE_URL);

const getErrorMessage = async (response: Response, defaultMsg: string) => {
  try {
    const errorData = await response.json();
    if (errorData && errorData.detail) {
      if (Array.isArray(errorData.detail)) {
        // FastAPI/Pydantic validation error
        const firstError = errorData.detail[0];
        const errorType = firstError.type;
        const fieldName = firstError.loc[firstError.loc.length - 1];
        
        // Try to translate the error type using i18n
        // Pydantic types look like 'string_too_short', 'value_error.email'
        const translationKey = `errors.${errorType}`;
        const translatedMsg = i18n.global.t(translationKey, { 
          ...firstError.ctx, 
          defaultValue: firstError.msg 
        });
        
        return `${fieldName}: ${translatedMsg}`;
      }
      return errorData.detail;
    }
  } catch (e) {}
  return defaultMsg;
};

export const getMaterials = async () => {
  const response = await fetch(`${API_BASE_URL}/materials?lang=${i18n.global.locale.value}`);
  if (!response.ok) {
    throw new Error('Failed to fetch materials');
  }
  return response.json();
};

export const getServices = async () => {
  const response = await fetch(`${API_BASE_URL}/services?lang=${i18n.global.locale.value}`);
  if (!response.ok) {
    throw new Error('Failed to fetch services');
  }
  return response.json();
};

export const uploadFilesToServer = async (data: FormData) => {
  const response = await fetch(`${API_BASE_URL}/files/upload`, {
    method: "POST",
    body: data,
  });
  if (!response.ok) throw new Error("Failed to upload files");
  return response.json();
};

export const submitOrder = async (orderData: FormData) => {
  const token = localStorage.getItem("token");
  const headers: Record<string, string> = {};
  if (token) {
    headers['Authorization'] = `Bearer ${token}`;
  }

  const response = await fetch(`${API_BASE_URL}/orders?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    body: orderData,
    headers: headers,
    // Note: Do not set Content-Type header manually when using FormData
    // The browser will automatically set it with the correct boundary
  });
  
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Failed to submit order'));
  }
  
  return response.json();
};

export const getMyOrders = async (page = 1, size = 10) => {
  const token = localStorage.getItem("token");
  if (!token) return { orders: [], total: 0 };
  
  const query = new URLSearchParams({ page: page.toString(), size: size.toString() });
  const response = await fetch(`${API_BASE_URL}/orders/my?${query.toString()}&lang=${i18n.global.locale.value}`, {
    headers: {
      'Authorization': `Bearer ${token}`
    }
  });
  
  if (!response.ok) {
    throw new Error('Failed to fetch orders');
  }
  
  return response.json();
};

export const registerUser = async (userData: any) => {
  const response = await fetch(`${API_BASE_URL}/auth/register?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(userData)
  });
  
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Failed to register'));
  }
  
  return response.json();
};

export const submitContactForm = async (formData: FormData) => {
  const response = await fetch(`${API_BASE_URL}/contact?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    body: formData,
  });
  
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Failed to send message'));
  }
  
  return response.json();
};
    headers: { 
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(userData),
  });
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Failed to register'));
  }
  return response.json();
};

export const loginUser = async (userData: any) => {
  const response = await fetch(`${API_BASE_URL}/auth/login?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(userData),
  });
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Incorrect credentials'));
  }
  return response.json();
};

export const logoutUser = async () => {
  const token = localStorage.getItem("token");
  if (!token) return;
  await fetch(`${API_BASE_URL}/auth/logout`, {
    method: 'POST',
    headers: { 'Authorization': `Bearer ${token}` }
  });
};

export const socialLogin = async (socialData: any) => {
  const response = await fetch(`${API_BASE_URL}/auth/social-login?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(socialData),
  });
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Social login failed'));
  }
  return response.json();
};

export const verifyEmail = async (token: string) => {
  const response = await fetch(`${API_BASE_URL}/auth/verify-email?token=${token}&lang=${i18n.global.locale.value}`);
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Verification failed'));
  }
  return response.json();
};

export const getCurrentUser = async () => {
  const token = localStorage.getItem("token");
  if (!token) return null;

  const response = await fetch(`${API_BASE_URL}/auth/me?lang=${i18n.global.locale.value}`, {
    headers: {
      'Authorization': `Bearer ${token}`
    }
  });
  
  if (!response.ok) {
    if (response.status === 401) {
      localStorage.removeItem("token");
    }
    return null;
  }
  
  return response.json();
};

export const updateProfile = async (userData: any) => {
  const token = localStorage.getItem("token");
  if (!token) throw new Error("No token found");

  const response = await fetch(`${API_BASE_URL}/auth/me?lang=${i18n.global.locale.value}`, {
    method: 'PUT',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(userData),
  });
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Failed to update profile'));
  }
  return response.json();
};

export const forgotPassword = async (email: string) => {
  const response = await fetch(`${API_BASE_URL}/auth/forgot-password?lang=${i18n.global.locale.value}`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ email }),
  });
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Failed to request reset'));
  }
  return response.json();
};

export const resetPassword = async (data: any) => {
  const response = await fetch(`${API_BASE_URL}/auth/reset-password?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(data),
  });
  if (!response.ok) {
    throw new Error(await getErrorMessage(response, 'Failed to reset password'));
  }
  return response.json();
};

export const adminGetOrders = async (filters: { search?: string, status?: string, date_from?: string, date_to?: string } = {}) => {
  const token = localStorage.getItem("token");
  const query = new URLSearchParams();
  if (filters.search) query.append("search", filters.search);
  if (filters.status) query.append("status", filters.status);
  if (filters.date_from) query.append("date_from", filters.date_from);
  if (filters.date_to) query.append("date_to", filters.date_to);
  
  const response = await fetch(`${API_BASE_URL}/orders/admin/list?${query.toString()}&lang=${i18n.global.locale.value}`, {
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to fetch admin orders");
  return response.json();
};

export const adminUpdateOrder = async (orderId: number, data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}?lang=${i18n.global.locale.value}`, {
    method: 'PATCH',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to update order");
  return response.json();
};

export const adminDeleteOrder = async (orderId: number) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}/admin?lang=${i18n.global.locale.value}`, {
    method: 'DELETE',
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to delete order");
  return response.json();
};

export const getPriceEstimate = async (data: any) => {
  const response = await fetch(`${API_BASE_URL}/orders/estimate?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to get estimate");
  return response.json();
};

export const adminGetMaterials = async () => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/materials?lang=${i18n.global.locale.value}`, {
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to fetch admin materials");
  return response.json();
};

export const adminCreateMaterial = async (data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/materials?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to create material");
  return response.json();
};

export const adminUpdateMaterial = async (id: number, data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/materials/${id}?lang=${i18n.global.locale.value}`, {
    method: 'PATCH',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to update material");
  return response.json();
};

export const adminGetServices = async () => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/services?lang=${i18n.global.locale.value}`, {
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to fetch admin services");
  return response.json();
};

export const adminCreateService = async (data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/services?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to create service");
  return response.json();
};

export const adminUpdateService = async (id: number, data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/services/${id}?lang=${i18n.global.locale.value}`, {
    method: 'PATCH',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to update service");
  return response.json();
};

export const adminDeleteMaterial = async (id: number) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/materials/${id}?lang=${i18n.global.locale.value}`, {
    method: 'DELETE',
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to delete material");
  return response.json();
};

export const adminDeleteService = async (id: number) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/services/${id}?lang=${i18n.global.locale.value}`, {
    method: 'DELETE',
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to delete service");
  return response.json();
};

export const adminUploadOrderPhoto = async (orderId: number, formData: FormData) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/orders/${orderId}/photos?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 
      'Authorization': `Bearer ${token}`
    },
    body: formData
  });
  if (!response.ok) throw new Error("Failed to upload photo");
  return response.json();
};

export const adminDeletePhoto = async (photoId: number) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/photos/${photoId}?lang=${i18n.global.locale.value}`, {
    method: 'DELETE',
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to delete photo");
  return response.json();
};

export const adminGetAllPhotos = async () => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/all-photos?lang=${i18n.global.locale.value}`, {
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to fetch all photos");
  return response.json();
};

export const adminAttachFile = async (orderId: number, formData: FormData) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}/attach-file?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 
      'Authorization': `Bearer ${token}`
    },
    body: formData
  });
  if (!response.ok) throw new Error("Failed to attach file");
  return response.json();
};

export const adminDeleteFile = async (orderId: number, fileId: number) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}/files/${fileId}?lang=${i18n.global.locale.value}`, {
    method: 'DELETE',
    headers: { 
      'Authorization': `Bearer ${token}`
    }
  });
  if (!response.ok) throw new Error("Failed to delete file");
  return response.json();
};

export const adminUpdatePhotoStatus = async (photoId: number, data: { is_public: boolean }) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/admin/photos/${photoId}?lang=${i18n.global.locale.value}`, {
    method: 'PATCH',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to update photo status");
  return response.json();
};

export const getPortfolio = async () => {
  const response = await fetch(`${API_BASE_URL}/portfolio?lang=${i18n.global.locale.value}`);
  if (!response.ok) throw new Error("Failed to fetch portfolio");
  return response.json();
};

export const getOrderDetails = async (orderId: number) => {
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}?lang=${i18n.global.locale.value}`);
  if (!response.ok) throw new Error("Failed to fetch order details");
  return response.json();
};

export const getOrderMessages = async (orderId: number, lang: string = i18n.global.locale.value) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}/messages?lang=${lang}`, {
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to fetch messages");
  return response.json();
};

export const sendOrderMessage = async (orderId: number, message: string, lang: string = i18n.global.locale.value) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}/messages?lang=${lang}`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify({ message })
  });
  if (response.status === 429) {
     const err = await response.json();
     throw new Error(err.detail || "Rate limit exceeded");
  }
  if (!response.ok) throw new Error("Failed to send message");
  return response.json();
};

export const authPing = async () => {
  const token = localStorage.getItem("token");
  if (!token) return null;
  try {
    const response = await fetch(`${API_BASE_URL}/auth/ping?lang=${i18n.global.locale.value}`, {
      method: "POST",
      headers: { "Authorization": `Bearer ${token}` }
    });
    if (response.ok) {
      return response.json();
    }
  } catch (e) {
    // silently fail
  }
  return null;
};

// Blog API
export const getBlogPosts = async (publishedOnly: boolean = true) => {
  const response = await fetch(`${API_BASE_URL}/blog?published_only=${publishedOnly}&lang=${i18n.global.locale.value}`);
  if (!response.ok) throw new Error("Failed to fetch blog posts");
  return response.json();
};

export const getBlogPost = async (idOrSlug: string) => {
  const response = await fetch(`${API_BASE_URL}/blog/${idOrSlug}?lang=${i18n.global.locale.value}`);
  if (!response.ok) throw new Error("Failed to fetch blog post");
  return response.json();
};

export const adminCreatePost = async (data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/blog?lang=${i18n.global.locale.value}`, {
    method: 'POST',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to create blog post");
  return response.json();
};

export const adminUpdatePost = async (id: number, data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/blog/${id}?lang=${i18n.global.locale.value}`, {
    method: 'PUT',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to update blog post");
  return response.json();
};

export const adminDeletePost = async (id: number) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/blog/${id}?lang=${i18n.global.locale.value}`, {
    method: 'DELETE',
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to delete blog post");
  return response.json();
};
export const adminGetUsers = async (page = 1, size = 50, search = "") => {
  const token = localStorage.getItem("token");
  const query = new URLSearchParams({ page: page.toString(), size: size.toString(), search });
  const response = await fetch(`${API_BASE_URL}/auth/admin/users?${query.toString()}`, {
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to fetch users");
  return response.json();
};
export const adminCreateUser = async (data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/auth/admin/users`, {
    method: 'POST',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) {
    const err = await response.json();
    throw new Error(err.detail || "Failed to create user");
  }
  return response.json();
};
export const adminUpdateUser = async (userId: number, data: any) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/auth/users/${userId}/admin?lang=${i18n.global.locale.value}`, {
    method: 'PATCH',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(data)
  });
  if (!response.ok) throw new Error("Failed to update user");
  return response.json();
};

export const adminGetAuditLogs = async (page = 1, size = 50, action = "") => {
  const token = localStorage.getItem("token");
  const query = new URLSearchParams({ page: page.toString(), size: size.toString() });
  if (action) query.append("action", action);
  
  const response = await fetch(`${API_BASE_URL}/admin/audit-logs?${query.toString()}`, {
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to fetch audit logs");
  return response.json();
};

export const adminGetOrderItems = async (orderId: number) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}/items?lang=${i18n.global.locale.value}`, {
    headers: { 'Authorization': `Bearer ${token}` }
  });
  if (!response.ok) throw new Error("Failed to fetch order items");
  return response.json();
};

export const adminUpdateOrderItems = async (orderId: number, items: any[]) => {
  const token = localStorage.getItem("token");
  const response = await fetch(`${API_BASE_URL}/orders/${orderId}/items?lang=${i18n.global.locale.value}`, {
    method: 'PUT',
    headers: { 
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${token}`
    },
    body: JSON.stringify(items)
  });
  if (!response.ok) throw new Error("Failed to update order items");
  return response.json();
};