import type { PositionRow, PositionsData } from '../types'

function makeList(names: string[], base: number): PositionRow[] {
  return names.map((name, i) => {
    const qty = Math.floor(base * (0.22 - i * 0.012) + Math.random() * 2000)
    const change = Math.floor((Math.random() - 0.45) * 800)
    return {
      rank: i + 1,
      name,
      qty,
      change,
      percent: 0,
    }
  })
}

function withPercent(list: PositionRow[]): PositionRow[] {
  const total = list.reduce((s, x) => s + x.qty, 0)
  return list.map((x) => ({
    ...x,
    percent: Number(((x.qty / total) * 100).toFixed(2)),
  }))
}

const longNames = [
  '中财期货',
  '东证期货',
  '恒力期货',
  '物产中大期货',
  '中信期货',
  '国泰君安期货',
  '海通期货',
  '永安期货',
  '银河期货',
  '华泰期货',
  '南华期货',
  '光大期货',
  '方正中期',
  '申银万国',
  '中粮期货',
  '浙商期货',
  '广发期货',
  '兴证期货',
  '瑞达期货',
  '其他',
]

const shortNames = [
  '国泰君安期货',
  '中信期货',
  '永安期货',
  '海通期货',
  '华泰期货',
  '银河期货',
  '中财期货',
  '东证期货',
  '南华期货',
  '光大期货',
  '恒力期货',
  '物产中大期货',
  '方正中期',
  '申银万国',
  '中粮期货',
  '浙商期货',
  '广发期货',
  '兴证期货',
  '瑞达期货',
  '其他',
]

const long = withPercent(makeList(longNames, 650000))
const short = withPercent(makeList(shortNames, 640000))
const volume = withPercent(makeList(longNames, 480000))
const netLong = withPercent(makeList(longNames.slice(0, 12), 120000))
const netShort = withPercent(makeList(shortNames.slice(0, 12), 110000))

export const positionsMock: PositionsData = {
  long,
  short,
  volume,
  netLong,
  netShort,
  topTwentySum: [
    { tradeDate: '2026-07-15', longSum: 1073446, shortSum: 1502020 },
    { tradeDate: '2026-07-14', longSum: 1094199, shortSum: 1519906 },
  ],
  updatedAt: '2026-07-15',
}