import real from '../src/data/realBases.js'
import fs from 'fs'
import path from 'path'
import { fileURLToPath } from 'url'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const b = real.find((x) => x.name === '东莞壹号农业')
if (!b) throw new Error('东莞壹号农业 not found')

const lon0 = b.lon0
const lat0 = b.lat0
const mPerDegLat = 111320
const mPerDegLon = 111320 * Math.cos((lat0 * Math.PI) / 180)
const toLL = (mx, my) => [
  +(lon0 + mx / mPerDegLon).toFixed(7),
  +(lat0 + my / mPerDegLat).toFixed(7),
]

function flatToRing(flat) {
  const ring = []
  for (let i = 0; i < flat.length; i += 2) ring.push(toLL(flat[i], flat[i + 1]))
  if (ring.length && (ring[0][0] !== ring.at(-1)[0] || ring[0][1] !== ring.at(-1)[1])) {
    ring.push([...ring[0]])
  }
  return ring
}

function flatToPts(flat, prefix) {
  const pts = []
  for (let i = 0; i < flat.length; i += 2) {
    const [lng, lat] = toLL(flat[i], flat[i + 1])
    pts.push({ code: `${prefix}-${String(pts.length + 1).padStart(2, '0')}`, lng, lat })
  }
  return pts
}

const ZNAME = { A: '抗旱性试验区', B: '抗寒性试验区' }
const zones = b.plots.map((p, i) => {
  const flat = p.r[0] || p.r
  const prefix = `P${i + 1}`
  const pts = flatToPts(p.s || [], prefix)
  const step = pts.length > 40 ? Math.ceil(pts.length / 28) : 1
  const sampled = pts.filter((_, idx) => idx % step === 0)
  return {
    id: prefix,
    part: p.part,
    sub: p.sub,
    name: `分区${p.sub} · ${ZNAME[p.sub] || '试验区'}`,
    role: p.role,
    group: p.g,
    mu: p.mu,
    ring: flatToRing(flat),
    points: sampled,
    pointTotal: pts.length,
  }
})

const allPts = zones.flatMap((z) => z.points.map((pt) => ({ ...pt, zoneId: z.id, role: z.role })))
const out = {
  id: 'FN-155',
  key: b.key,
  name: b.name,
  prov: b.prov,
  city: b.city,
  crop: b.crop,
  lon0,
  lat0,
  mu: b.mu,
  zones,
  samplePointCount: allPts.length,
  plantCount: 1039,
  gridCount: 55,
}

const dir = path.join(__dirname, '../src/api/mock')
fs.mkdirSync(dir, { recursive: true })
const file = path.join(dir, 'dongguan-map.json')
fs.writeFileSync(file, JSON.stringify(out))
console.log('zones', zones.length, 'points', allPts.length, 'bytes', fs.statSync(file).size)