/**
 * Tests for cfc-frontend utils/format.js
 *
 * Tests the price/rate/score formatting utilities.
 * These are pure functions - no uni mock needed.
 */

describe('format.js', () => {
  let format

  beforeAll(() => {
    format = require('@/utils/format')
  })

  // --------------- formatPrice ---------------

  describe('formatPrice', () => {
    test('converts cents to yuan with 2 decimals', () => {
      expect(format.formatPrice(1250)).toBe('12.50')
      expect(format.formatPrice(0)).toBe('0.00')
      expect(format.formatPrice(999)).toBe('9.99')
      expect(format.formatPrice(10000)).toBe('100.00')
    })

    test('handles null and undefined', () => {
      expect(format.formatPrice(null)).toBeNull()
      expect(format.formatPrice(undefined)).toBeNull()
    })

    test('handles zero cents', () => {
      expect(format.formatPrice(0)).toBe('0.00')
    })
  })

  // --------------- formatPriceWithSymbol ---------------

  describe('formatPriceWithSymbol', () => {
    test('adds ¥ prefix and 2 decimals', () => {
      expect(format.formatPriceWithSymbol(1250)).toBe('¥12.50')
      expect(format.formatPriceWithSymbol(0)).toBe('¥0.00')
      expect(format.formatPriceWithSymbol(999)).toBe('¥9.99')
    })

    test('returns login message for null/undefined', () => {
      expect(format.formatPriceWithSymbol(null)).toBe('登录查看')
      expect(format.formatPriceWithSymbol(undefined)).toBe('登录查看')
    })
  })

  // --------------- formatRate ---------------

  describe('formatRate', () => {
    test('converts permillage to percentage string', () => {
      expect(format.formatRate(235)).toBe('23.5%')
      expect(format.formatRate(0)).toBe('0%')
      expect(format.formatRate(1000)).toBe('100%')
      expect(format.formatRate(5)).toBe('0.5%')
    })

    test('returns -- for null/undefined', () => {
      expect(format.formatRate(null)).toBe('--')
      expect(format.formatRate(undefined)).toBe('--')
    })
  })

  // --------------- formatScore ---------------

  describe('formatScore', () => {
    test('converts percent-scale to fixed decimal', () => {
      expect(format.formatScore(450)).toBe('4.5')
      expect(format.formatScore(0)).toBe('0.0')
      expect(format.formatScore(1000)).toBe('10.0')
    })

    test('uses default 1 decimal place', () => {
      expect(format.formatScore(450)).toBe('4.5')
    })

    test('supports custom decimal places', () => {
      expect(format.formatScore(450, 2)).toBe('4.50')
      expect(format.formatScore(450, 0)).toBe('5')
    })

    test('returns -- for null/undefined', () => {
      expect(format.formatScore(null)).toBe('--')
      expect(format.formatScore(undefined)).toBe('--')
    })
  })

  // --------------- parseDate ---------------

  describe('parseDate', () => {
    // 断言使用本地时间字段（getFullYear/getMonth/getDate/...），
    // 避免 Node（V8）对纯日期字符串按 UTC 解析带来的时区差异。
    const ymd = (d) => {
      return d.getFullYear() + '-' + (d.getMonth() + 1) + '-' + d.getDate()
    }

    test('parses MySQL DATETIME with space separator "yyyy-MM-dd HH:mm"', () => {
      // iOS 原生 new Date() 无法解析空格分隔格式，parseDate 必须归一化成功
      const d = format.parseDate('2026-08-22 14:00')
      expect(d).not.toBeNull()
      expect(ymd(d)).toBe('2026-8-22')
      expect(d.getHours()).toBe(14)
      expect(d.getMinutes()).toBe(0)
    })

    test('parses MySQL DATETIME with seconds', () => {
      const d = format.parseDate('2026-08-22 14:00:30')
      expect(d).not.toBeNull()
      expect(ymd(d)).toBe('2026-8-22')
      expect(d.getSeconds()).toBe(30)
    })

    test('parses Java "EEE MMM dd HH:mm:ss zzz yyyy" (CST) format', () => {
      // 后端 Java 常见格式，iOS 原生无法解析
      const d = format.parseDate('Sat Aug 22 14:00:00 CST 2026')
      expect(d).not.toBeNull()
      expect(ymd(d)).toBe('2026-8-22')
      expect(d.getHours()).toBe(14)
    })

    test('parses slash-separated "yyyy/MM/dd"', () => {
      const d = format.parseDate('2026/08/22')
      expect(d).not.toBeNull()
      expect(ymd(d)).toBe('2026-8-22')
    })

    test('parses ISO 8601 "yyyy-MM-ddTHH:mm:ss"', () => {
      const d = format.parseDate('2026-08-22T14:00:00')
      expect(d).not.toBeNull()
      expect(ymd(d)).toBe('2026-8-22')
    })

    test('parses plain date "yyyy-MM-dd"', () => {
      const d = format.parseDate('2026-08-22')
      expect(d).not.toBeNull()
      expect(ymd(d)).toBe('2026-8-22')
    })

    test('parses numeric timestamp', () => {
      const d = format.parseDate(1780000000000)
      expect(d).not.toBeNull()
      expect(d.getTime()).toBe(1780000000000)
    })

    test('returns same Date object when given a Date', () => {
      const date = new Date()
      expect(format.parseDate(date)).toBe(date)
    })

    test('returns null for null/undefined/empty string', () => {
      expect(format.parseDate(null)).toBeNull()
      expect(format.parseDate(undefined)).toBeNull()
      expect(format.parseDate('')).toBeNull()
    })

    test('returns null for unparseable string', () => {
      expect(format.parseDate('not-a-date')).toBeNull()
      expect(format.parseDate('2026-13-45')).toBeNull()
    })
  })
})