import { apiGet, apiPost, apiPatch } from './client'
import type { AreaCreate, AreaListResponse, AreaRead, MunicipalitySearchResponse } from '../../types'

const AREA_PAGE_SIZE = 200

async function listProjectAreas(projectId: string): Promise<AreaListResponse> {
  const items: AreaRead[] = []
  let offset = 0
  let total: number | null = null
  do {
    const page = await apiGet<AreaListResponse>(
      `/api/v1/projects/${projectId}/areas?limit=${AREA_PAGE_SIZE}&offset=${offset}`,
    )
    if (total === null) {
      total = page.total
    } else if (page.total !== total) {
      throw new Error('De gebiedslijst wijzigde tijdens het laden. Vernieuw de werkruimte.')
    }
    items.push(...page.items)
    if (page.items.length === 0) {
      break
    }
    offset += page.items.length
  } while (offset < (total ?? 0))
  if (total !== null && items.length !== total) {
    throw new Error(`Niet alle gebieden konden worden geladen (${items.length}/${total}).`)
  }
  return { items, total: total ?? 0, limit: items.length, offset: 0 }
}

export const areasApi = {
  list: listProjectAreas,
  create: (projectId: string, payload: AreaCreate): Promise<AreaRead> =>
    apiPost<AreaRead>(`/api/v1/projects/${projectId}/areas`, payload),
  get: (projectId: string, areaId: string): Promise<AreaRead> =>
    apiGet<AreaRead>(`/api/v1/projects/${projectId}/areas/${areaId}`),
  update: (projectId: string, areaId: string, payload: Partial<AreaCreate>): Promise<AreaRead> =>
    apiPatch<AreaRead>(`/api/v1/projects/${projectId}/areas/${areaId}`, payload),
  searchMunicipalities: (projectId: string, query: string): Promise<MunicipalitySearchResponse> =>
    apiGet<MunicipalitySearchResponse>(`/api/v1/projects/${projectId}/areas/municipalities?query=${encodeURIComponent(query)}&limit=12`),
  activateMunicipality: (projectId: string, niscode: string): Promise<AreaRead> =>
    apiPost<AreaRead>(`/api/v1/projects/${projectId}/areas/municipalities/${encodeURIComponent(niscode)}/activate`, {}),
}