const API_URL = 'http://localhost:5000/api';

export interface Vehicle {
  vin: string;
  status: string;
  currentVersion: string;
  lastHeartbeat: string;
  groupId?: number;
  group?: VehicleGroup;
}

export interface VehicleGroup {
  id: number;
  name: string;
  description?: string;
  vehicles?: Vehicle[];
}

export interface FirmwareUpdate {
  id: number;
  version: string;
  description?: string;
  uploadedAt: string;
}

export interface Deployment {
  id: number;
  updateId: number;
  targetVin?: string;
  targetGroupId?: number;
  status: string;
  createdAt: string;
  update: FirmwareUpdate;
}

export async function fetchVehicles(): Promise<Vehicle[]> {
  const res = await fetch(`${API_URL}/admin/vehicles`);
  if (!res.ok) throw new Error('Failed to fetch vehicles');
  return res.json();
}

export async function fetchGroups(): Promise<VehicleGroup[]> {
  const res = await fetch(`${API_URL}/admin/groups`);
  if (!res.ok) throw new Error('Failed to fetch groups');
  return res.json();
}

export async function getUpdates(): Promise<FirmwareUpdate[]> {
  const res = await fetch(`${API_URL}/admin/updates`);
  if (!res.ok) throw new Error('Failed to fetch updates');
  return res.json();
}

export async function createGroup(name: string, description?: string): Promise<VehicleGroup> {
  const res = await fetch(`${API_URL}/admin/groups`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ name, description }),
  });
  if (!res.ok) throw new Error('Failed to create group');
  return res.json();
}

export async function updateGroup(id: number, name: string, description?: string): Promise<VehicleGroup> {
  const res = await fetch(`${API_URL}/admin/groups/${id}`, {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ name, description }),
  });
  if (!res.ok) throw new Error('Failed to update group');
  return res.json();
}

export async function assignVehicleToGroup(groupId: number, vin: string): Promise<void> {
  const res = await fetch(`${API_URL}/admin/groups/${groupId}/vehicles`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ vin }),
  });
  if (!res.ok) throw new Error('Failed to assign vehicle to group');
}

export async function fetchDeployments(): Promise<Deployment[]> {
  const res = await fetch(`${API_URL}/admin/deployments`);
  if (!res.ok) throw new Error('Failed to fetch deployments');
  return res.json();
}

export async function uploadUpdate(formData: FormData): Promise<void> {
  const res = await fetch(`${API_URL}/admin/updates`, {
    method: 'POST',
    body: formData,
  });
  if (!res.ok) throw new Error('Failed to upload update');
}

export async function createDeployment(updateId: number, targetVin?: string, targetGroupId?: number): Promise<void> {
  const res = await fetch(`${API_URL}/admin/deployments`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ updateId, targetVin, targetGroupId }),
  });
  if (!res.ok) throw new Error('Failed to create deployment');
}