import { api } from '@/lib/api'
import type {
  PaginatedResponse,
  RegionResponse,
  ManageRegionResponse,
  RegionHierarchyResponse,
  RegionDashboardResponse,
  RegionManageEntryResponse,
  RegionManageEntryType,
  RouteResponse,
  RouteVisitResponse,
  VehicleResponse,
  WarehouseResponse,
  VehicleType,
  WarehouseType,
} from '@/types/api'

const VEHICLE_TYPE_CODES: Record<VehicleType, number> = {
  Car: 0,
  Truck: 1,
  Van: 2,
  Motorcycle: 3,
  Bicycle: 4,
}

const VEHICLE_TYPE_VALUES = ['Car', 'Truck', 'Van', 'Motorcycle', 'Bicycle'] as const

function normalizeVehicleType(type: VehicleType | number): VehicleType {
  if (typeof type === 'number') {
    return VEHICLE_TYPE_VALUES[type] ?? 'Car'
  }

  return type
}

function normalizeVehicle(
  vehicle: VehicleResponse | (Omit<VehicleResponse, 'type'> & { type: VehicleType | number })
): VehicleResponse {
  return {
    ...vehicle,
    type: normalizeVehicleType(vehicle.type),
  }
}

function normalizeVehicleListResponse(
  response: PaginatedResponse<VehicleResponse> | (Omit<VehicleResponse, 'type'> & { type: VehicleType | number })[],
  params?: VehicleListParams
): PaginatedResponse<VehicleResponse> {
  if (Array.isArray(response)) {
    const page = params?.page ?? 1
    const pageSize = params?.pageSize ?? (response.length || 1)
    const start = (page - 1) * pageSize
    const items = response.slice(start, start + pageSize).map(normalizeVehicle)

    return {
      page,
      pageSize,
      total: response.length,
      items,
    }
  }

  return {
    ...response,
    items: response.items.map(normalizeVehicle),
  }
}

function serializeVehicleBody(body: VehicleBody | Partial<VehicleBody>) {
  return {
    ...body,
    ...(body.type ? { type: VEHICLE_TYPE_CODES[body.type] } : {}),
  }
}

// ─── Pagination ───────────────────────────────────────────────────────────────

export interface PageParams {
  page?: number
  pageSize?: number
}

// ─── Regions ──────────────────────────────────────────────────────────────────

export interface RegionBody {
  name: string
  isActive?: boolean
}

export const regions = {
  list: (params?: PageParams) =>
    api.get<PaginatedResponse<RegionResponse>>('/regions', { params }).then(r => r.data),

  get: (id: string) =>
    api.get<RegionResponse>(`/regions/${id}`).then(r => r.data),

  create: (body: RegionBody) =>
    api.post<RegionResponse>('/regions', body).then(r => r.data),

  update: (id: string, body: Partial<RegionBody>) =>
    api.put<RegionResponse>(`/regions/${id}`, body).then(r => r.data),

  remove: (id: string) =>
    api.delete(`/regions/${id}`),

  // Consolidated replacement for the old separate setTarget/setBudget/mapAgency/setTaxRule
  // calls — pass only the fields you want to change (Period is required alongside targetValue
  // and/or budgetAmount).
  manage: (id: string, body: { period?: string; targetValue?: number; budgetAmount?: number; agencyUserId?: string; ruleConfig?: string }) =>
    api.put<ManageRegionResponse>(`/regions/${id}/manage`, body).then(r => r.data),

  // Flat CRUD-list view over targets/budgets/tax-rules/agency-maps across all regions.
  manageEntries: () =>
    api.get<RegionManageEntryResponse[]>('/regions/manage-entries').then(r => r.data),

  removeManageEntry: (entryType: RegionManageEntryType, id: string) =>
    api.delete(`/regions/manage-entries/${entryType}/${id}`),

  hierarchy: (id: string) =>
    api.get<RegionHierarchyResponse>(`/regions/${id}/hierarchy`).then(r => r.data),

  dashboard: (id: string, period?: string) =>
    api.get<RegionDashboardResponse>(`/regions/${id}/dashboard`, { params: { period } }).then(r => r.data),
}

// ─── Routes ───────────────────────────────────────────────────────────────────

export interface RouteBody {
  regionId: string
  routeName: string
  startPoint?: string | null
  endPoint?: string | null
  length?: number | null
  isActive?: boolean
}

export const routes = {
  list: (params?: PageParams & { regionId?: string }) =>
    api.get<PaginatedResponse<RouteResponse>>('/routes', { params }).then(r => r.data),

  get: (id: string) =>
    api.get<RouteResponse>(`/routes/${id}`).then(r => r.data),

  create: (body: RouteBody) =>
    api.post<RouteResponse>('/routes', body).then(r => r.data),

  update: (id: string, body: Partial<RouteBody>) =>
    api.put<RouteResponse>(`/routes/${id}`, body).then(r => r.data),

  remove: (id: string) =>
    api.delete(`/routes/${id}`),

  assignStores: (id: string, storeIds: string[]) =>
    api.post<RouteResponse>(`/routes/${id}/stores`, { storeIds }).then(r => r.data),

  assignOwner: (id: string, salesRepId: string) =>
    api.put<RouteResponse>(`/routes/${id}/owner`, { salesRepId }).then(r => r.data),

  checkIn: (id: string, body: { storeId: string; latitude: number; longitude: number; checkedInByUserId: string }) =>
    api.post<RouteVisitResponse>(`/routes/${id}/visits/check-in`, body).then(r => r.data),

  checkOut: (id: string, body: { storeId: string }) =>
    api.post<RouteVisitResponse>(`/routes/${id}/visits/check-out`, body).then(r => r.data),
}

// ─── Vehicles ─────────────────────────────────────────────────────────────────

export interface VehicleBody {
  regNumber: string
  numberPlate: string
  type: VehicleType
}

export interface VehicleListParams extends PageParams {
  available?: boolean
  isActive?: boolean
}

export const vehicles = {
  list: (params?: VehicleListParams) =>
    api.get<PaginatedResponse<VehicleResponse> | VehicleResponse[]>('/vehicles', { params }).then(r =>
      normalizeVehicleListResponse(r.data, params)
    ),

  get: (id: string) =>
    api.get<VehicleResponse>(`/vehicles/${id}`).then(r => normalizeVehicle(r.data)),

  create: (body: VehicleBody) =>
    api.post<VehicleResponse>('/vehicles', serializeVehicleBody(body)).then(r => normalizeVehicle(r.data)),

  update: (id: string, body: Partial<VehicleBody>) =>
    api.put<VehicleResponse>(`/vehicles/${id}`, serializeVehicleBody(body)).then(r => normalizeVehicle(r.data)),

  remove: (id: string) =>
    api.delete(`/vehicles/${id}`),
}

// ─── Warehouses ───────────────────────────────────────────────────────────────

export interface WarehouseBody {
  name: string
  location: string
  type: WarehouseType
  vehicleId?: string | null
  isActive?: boolean
}

export const warehouses = {
  list: (params?: PageParams) =>
    api.get<PaginatedResponse<WarehouseResponse>>('/warehouses', { params }).then(r => r.data),

  get: (id: string) =>
    api.get<WarehouseResponse>(`/warehouses/${id}`).then(r => r.data),

  create: (body: WarehouseBody) =>
    api.post<WarehouseResponse>('/warehouses', body).then(r => r.data),

  update: (id: string, body: Partial<WarehouseBody>) =>
    api.put<WarehouseResponse>(`/warehouses/${id}`, body).then(r => r.data),

  remove: (id: string) =>
    api.delete(`/warehouses/${id}`),
}