import { describe, test, expect, Result } from './tests.uts'

export function testForLoop(): Result {
  return describe('ForLoop', () => {
    test('syntax', () => {
      const result: number[] = []
      for (let i = 0; i < 5; i++) {
        result.push(i)
      }
      expect(result).toEqual([0, 1, 2, 3, 4])

      const result1: number[] = []
      for (let i = 4; i >= 0; i--) {
        result1.push(i)
      }
      expect(result1).toEqual([4, 3, 2, 1, 0])

      const result2: number[] = []
      let limit = 3
      for (let i = 0; i < limit; i++) {
        result2.push(i)
        if (i === 2) {
          limit = 5
        }
      }
      expect(result2).toEqual([0, 1, 2, 3, 4])

      const result3: number[] = []
      const condition = true
      for (let i = 0; condition; i++) {
        if (i === 5) {
          break
        }
        result3.push(i)
      }
      expect(result3).toEqual([0, 1, 2, 3, 4])

      const result4: number[] = []
      let i = 0
      const fnCondition = (): boolean => i < 5
      for (; fnCondition(); i++) {
        result4.push(i)
      }
      expect(result4).toEqual([0, 1, 2, 3, 4])

      const result5: number[] = []
      let counter = 0
      for (;;) {
        result5.push(counter)
        counter++
        if (counter === 5) {
          break
        }
      }
      expect(result5).toEqual([0, 1, 2, 3, 4])

      // let result6 = 0
      // for (; result6 < 5; result6++);
      // expect(result6).toEqual(5)
    })

    test('break and continue', () => {
      const result: number[] = []
      for (let i = 0; i < 5; i++) {
        if (i === 2) {
          continue
        }
        if (i === 4) {
          break
        }
        result.push(i)
      }
      expect(result).toEqual([0, 1, 3])

      const result1: number[] = []
      for (let i = 1; i <= 5; i++) {
        result1.push(i)
        if (i === 3) {
          break
        }
        for (let j = 1; j <= 3; j++) {
          result1.push(j)
          if (j === 2) {
            continue
          }
        }
      }
      expect(result1).toEqual([1, 1, 2, 3, 2, 1, 2, 3, 3])

      const result2: string[] = []
      for (let i = 1; i <= 3; i++) {
        if (i === 2) {
          continue
        }
        for (let j = 1; j <= 3; j++) {
          if (j === 2) {
            break
          }
          for (let k = 1; k <= 3; k++) {
            if (k === 2) {
              continue
            }
            for (let l = 1; l <= 3; l++) {
              if (l === 2) {
                continue
              }
              result2.push(`${i}${j}${k}${l}`)
              if (i === 3 && j === 3 && k === 3 && l === 3) {
                break
              }
            }
            if (i === 3 && j === 3 && k === 3) {
              break
            }
          }
        }
      }
      expect(result2).toEqual([
        '1111',
        '1113',
        '1131',
        '1133',
        '3111',
        '3113',
        '3131',
        '3133'
      ])

      // const result3 : string[] = []
      // for (let i = 1; i <= 3; i++) {
      //   if (i === 2) {
      //     result3.push(`i=${i} (Continue)`)
      //     continue
      //   }
      //   for (let j = 1; j <= 2; j++) {
      //     if (j === 1) {
      //       result3.push(`i=${i}, j=${j}`)
      //     } else {
      //       result3.push(`i=${i}, j=${j} (Continue)`)
      //       continue
      //     }
      //     TODO 多个表达式
      //     for (let k = 1, l = 3; k <= 3 && l >= 1; k++, l--) {
      //       if (k === 2) {
      //         result3.push(`i=${i}, j=${j}, k=${k} (Continue)`)
      //         continue
      //       }
      //       if (l === 2) {
      //         result3.push(`i=${i}, j=${j}, k=${k}, l=${l} (Break)`)
      //         break
      //       }
      //       result3.push(`i=${i}, j=${j}, k=${k}, l=${l}`)
      //     }
      //   }
      // }
      // expect(result3).toEqual([
      //   "i=1, j=1",
      //   "i=1, j=1, k=1, l=3",
      //   "i=1, j=1, k=2 (Continue)",
      //   "i=1, j=1, k=3, l=1",
      //   "i=1, j=2 (Continue)",
      //   "i=2 (Continue)",
      //   "i=3, j=1",
      //   "i=3, j=1, k=1, l=3",
      //   "i=3, j=1, k=2 (Continue)",
      //   "i=3, j=1, k=3, l=1",
      //   "i=3, j=2 (Continue)"
      // ])

      const result4: string[] = []
      for (let a = 1; a <= 2; a++) {
        for (let b = 1; b <= 3; b++) {
          for (let c = 1; c <= 2; c++) {
            if (a === 2 && b === 2 && c === 1) {
              result4.push(`a=${a}, b=${b}, c=${c} (Break)`)
              break
            } else {
              result4.push(`a=${a}, b=${b}, c=${c}`)
            }
            for (let d = 1; d <= 3; d++) {
              if (d === 2) {
                result4.push(`a=${a}, b=${b}, c=${c}, d=${d} (Continue)`)
                continue
              }
              for (let e = 1; e <= 2; e++) {
                if (e === 2) {
                  result4.push(
                    `a=${a}, b=${b}, c=${c}, d=${d}, e=${e} (Continue)`
                  )
                  continue
                }
                for (let f = 1; f <= 3; f++) {
                  if (f === 2) {
                    result4.push(
                      `a=${a}, b=${b}, c=${c}, d=${d}, e=${e}, f=${f} (Continue)`
                    )
                    continue
                  }
                }
              }
            }
          }
        }
      }
      expect(result4).toEqual([
        'a=1, b=1, c=1',
        'a=1, b=1, c=1, d=1, e=1, f=2 (Continue)',
        'a=1, b=1, c=1, d=1, e=2 (Continue)',
        'a=1, b=1, c=1, d=2 (Continue)',
        'a=1, b=1, c=1, d=3, e=1, f=2 (Continue)',
        'a=1, b=1, c=1, d=3, e=2 (Continue)',
        'a=1, b=1, c=2',
        'a=1, b=1, c=2, d=1, e=1, f=2 (Continue)',
        'a=1, b=1, c=2, d=1, e=2 (Continue)',
        'a=1, b=1, c=2, d=2 (Continue)',
        'a=1, b=1, c=2, d=3, e=1, f=2 (Continue)',
        'a=1, b=1, c=2, d=3, e=2 (Continue)',
        'a=1, b=2, c=1',
        'a=1, b=2, c=1, d=1, e=1, f=2 (Continue)',
        'a=1, b=2, c=1, d=1, e=2 (Continue)',
        'a=1, b=2, c=1, d=2 (Continue)',
        'a=1, b=2, c=1, d=3, e=1, f=2 (Continue)',
        'a=1, b=2, c=1, d=3, e=2 (Continue)',
        'a=1, b=2, c=2',
        'a=1, b=2, c=2, d=1, e=1, f=2 (Continue)',
        'a=1, b=2, c=2, d=1, e=2 (Continue)',
        'a=1, b=2, c=2, d=2 (Continue)',
        'a=1, b=2, c=2, d=3, e=1, f=2 (Continue)',
        'a=1, b=2, c=2, d=3, e=2 (Continue)',
        'a=1, b=3, c=1',
        'a=1, b=3, c=1, d=1, e=1, f=2 (Continue)',
        'a=1, b=3, c=1, d=1, e=2 (Continue)',
        'a=1, b=3, c=1, d=2 (Continue)',
        'a=1, b=3, c=1, d=3, e=1, f=2 (Continue)',
        'a=1, b=3, c=1, d=3, e=2 (Continue)',
        'a=1, b=3, c=2',
        'a=1, b=3, c=2, d=1, e=1, f=2 (Continue)',
        'a=1, b=3, c=2, d=1, e=2 (Continue)',
        'a=1, b=3, c=2, d=2 (Continue)',
        'a=1, b=3, c=2, d=3, e=1, f=2 (Continue)',
        'a=1, b=3, c=2, d=3, e=2 (Continue)',
        'a=2, b=1, c=1',
        'a=2, b=1, c=1, d=1, e=1, f=2 (Continue)',
        'a=2, b=1, c=1, d=1, e=2 (Continue)',
        'a=2, b=1, c=1, d=2 (Continue)',
        'a=2, b=1, c=1, d=3, e=1, f=2 (Continue)',
        'a=2, b=1, c=1, d=3, e=2 (Continue)',
        'a=2, b=1, c=2',
        'a=2, b=1, c=2, d=1, e=1, f=2 (Continue)',
        'a=2, b=1, c=2, d=1, e=2 (Continue)',
        'a=2, b=1, c=2, d=2 (Continue)',
        'a=2, b=1, c=2, d=3, e=1, f=2 (Continue)',
        'a=2, b=1, c=2, d=3, e=2 (Continue)',
        'a=2, b=2, c=1 (Break)',
        'a=2, b=3, c=1',
        'a=2, b=3, c=1, d=1, e=1, f=2 (Continue)',
        'a=2, b=3, c=1, d=1, e=2 (Continue)',
        'a=2, b=3, c=1, d=2 (Continue)',
        'a=2, b=3, c=1, d=3, e=1, f=2 (Continue)',
        'a=2, b=3, c=1, d=3, e=2 (Continue)',
        'a=2, b=3, c=2',
        'a=2, b=3, c=2, d=1, e=1, f=2 (Continue)',
        'a=2, b=3, c=2, d=1, e=2 (Continue)',
        'a=2, b=3, c=2, d=2 (Continue)',
        'a=2, b=3, c=2, d=3, e=1, f=2 (Continue)',
        'a=2, b=3, c=2, d=3, e=2 (Continue)'
      ])

      const result5: string[] = []
      for (let i = 1; i <= 5; i++) {
        let str = `${i}: `
        if (i % 2 === 0) {
          str += 'EVEN'
        } else {
          str += 'ODD'
        }
        if (i === 3) {
          result5.push(str + ' (Loop Break)')
          break
        }
        for (let j = 1; j <= 3; j++) {
          if (j === 2) {
            str += ' (Inner Continue)'
            continue
          }
          str += ` - ${j}`
          result5.push(str)
        }
        result5.push(str + ' (End of Outer)')
      }
      expect(result5).toEqual([
        '1: ODD - 1',
        '1: ODD - 1 (Inner Continue) - 3',
        '1: ODD - 1 (Inner Continue) - 3 (End of Outer)',
        '2: EVEN - 1',
        '2: EVEN - 1 (Inner Continue) - 3',
        '2: EVEN - 1 (Inner Continue) - 3 (End of Outer)',
        '3: ODD (Loop Break)'
      ])
    })
  })
}