import { describe, expect, test } from "vitest";
import { ConstArray, isHeadless, parse, serialize, sizeof, sizeofHead } from "../src";
import { expectDataViewEqual } from ".";
import { filledDataView, sizedDataView } from "../src";

describe(ConstArray.name, () => {
  test('serialize, Number', () => {
    const expected = filledDataView([
      0x3F, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    ])
    let dv = sizedDataView(15)
    expect(() => serialize(dv, [1, 2], ConstArray(2), Number)).toThrow()

    dv = sizedDataView(sizeof(ConstArray(2), Number))
    expect(16).toEqual(dv.byteLength)

    expect(() => serialize(dv, [1, 2, 3], ConstArray(2), Number)).toThrow()

    serialize(dv, [1, 2], ConstArray(2), Number)
    expectDataViewEqual(dv, expected)
  })

  test('parse, Number', () => {
    const expected = [1, 2]
    const dv = filledDataView([
      0x3F, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    ])
    const actual = parse(dv, ConstArray(2), Number)
    expectDataViewEqual(actual, expected)
  })

  test('sizeof', () => {
    expect(sizeofHead(ConstArray(2), Number)).toEqual(16)
  })

  const array_dv = filledDataView([
    0x00, 0x00, 0x00, 0x08,
    0x00, 0x00, 0x00, 0x11,
    // hello
    0x00, 0x00, 0x00, 0x05,
    0x68, 0x65, 0x6C, 0x6C, 0x6F,
    // sek1ro
    0x00, 0x00, 0x00, 0x06,
    0x73, 0x65, 0x6b, 0x31, 0x72, 0x6f,
  ])
  const array = ['hello', 'sek1ro']

  test('serialize, String', () => {

    const actual = sizedDataView(sizeof(array, ConstArray(2), String))
    
    expect(() => sizeof(ConstArray(2), String)).toThrow()

    serialize(actual, array, ConstArray(2), String)
    expectDataViewEqual(actual, array_dv)
  })

  test('parse, String', () => {
    expect(parse(array_dv, ConstArray(2), String)).toEqual(array)
  })

  test('isHeadless', () => {
    expect(isHeadless(ConstArray(2), Number)).toBeFalsy()
    expect(isHeadless(ConstArray(2), String)).toBeTruthy()
  })

  test('sizeof', () => {
    expect(sizeof(ConstArray(2), Number)).toBe(16)
    expect(() => sizeof(ConstArray(2), String)).toThrow()
    expect(sizeof(['hello', 'sek1ro'], ConstArray(2), String)).toBe(27)
  })
})