import assert from 'node:assert/strict'
import { describe, it } from 'node:test'
import { ref } from 'vue'
import { useAdminMarkdownSourceActions } from '../composables/useAdminMarkdownSourceActions.js'

/**
 * 소스 액션 테스트 상태를 만든다.
 * @param {string} initialValue - 초기 본문
 * @param {number} start - 선택 시작
 * @param {number} end - 선택 끝
 * @returns {Object} 테스트 상태
 */
const createSourceActionHarness = (initialValue, start = 0, end = start) => {
  const value = ref(initialValue)
  const selection = {
    start,
    end
  }

  const actions = useAdminMarkdownSourceActions({
    value,
    getSelectionState: () => ({
      start: selection.start,
      end: selection.end,
      value: value.value
    }),
    setTextareaSelection: (selectionStart, selectionEnd = selectionStart) => {
      selection.start = selectionStart
      selection.end = selectionEnd
    }
  })

  return {
    value,
    selection,
    actions
  }
}

describe('useAdminMarkdownSourceActions', () => {
  it('선택 영역을 지정 문자열로 교체하고 선택 범위를 갱신한다', () => {
    const harness = createSourceActionHarness('hello world', 6, 11)

    harness.actions.replaceSelection('sori')

    assert.equal(harness.value.value, 'hello sori')
    assert.deepEqual(harness.selection, {
      start: 10,
      end: 10
    })
  })

  it('블록 조각 삽입 시 주변 줄바꿈을 보정한다', () => {
    const harness = createSourceActionHarness('앞문장뒤문장', 3, 3)

    harness.actions.insertBlockSnippet('![](/uploads/a.png)')

    assert.equal(harness.value.value, '앞문장\n\n![](/uploads/a.png)\n\n뒤문장')
    assert.deepEqual(harness.selection, {
      start: 26,
      end: 26
    })
  })

  it('인라인 감싸기와 링크 삽입은 새 선택 위치를 유지한다', () => {
    const boldHarness = createSourceActionHarness('굵게', 0, 2)
    boldHarness.actions.wrapInline('**', '**', '굵은 글씨')

    assert.equal(boldHarness.value.value, '**굵게**')
    assert.deepEqual(boldHarness.selection, {
      start: 2,
      end: 4
    })

    const linkHarness = createSourceActionHarness('문서', 0, 2)
    linkHarness.actions.insertInlineLink()

    assert.equal(linkHarness.value.value, '[문서](https://)')
    assert.deepEqual(linkHarness.selection, {
      start: 5,
      end: 13
    })
  })

  it('줄 단위 제목·인용·목록 변환을 적용한다', () => {
    const headingHarness = createSourceActionHarness('기존\n문장', 0, 2)
    headingHarness.actions.applyHeading(2)

    assert.equal(headingHarness.value.value, '## 기존\n문장')

    const quoteHarness = createSourceActionHarness('첫 줄\n둘째 줄', 0, 7)
    quoteHarness.actions.applyQuote()

    assert.equal(quoteHarness.value.value, '> 첫 줄\n> 둘째 줄')

    const listHarness = createSourceActionHarness('첫 줄\n- 둘째 줄', 0, 10)
    listHarness.actions.applyList()

    assert.equal(listHarness.value.value, '- 첫 줄\n- 둘째 줄')
  })

  it('코드 블록 삽입은 선택 본문을 유지하고 코드 본문을 선택한다', () => {
    const harness = createSourceActionHarness('console.log(1)', 0, 14)

    harness.actions.insertCodeBlock()

    assert.equal(harness.value.value, '```\nconsole.log(1)\n```')
    assert.deepEqual(harness.selection, {
      start: 4,
      end: 18
    })
  })

  it('선택 범위가 걸친 줄을 삭제한다', () => {
    const harness = createSourceActionHarness('첫 줄\n둘째 줄\n셋째 줄', 4, 7)

    harness.actions.deleteSelectedSourceLines()

    assert.equal(harness.value.value, '첫 줄\n셋째 줄')
    assert.deepEqual(harness.selection, {
      start: 0,
      end: 0
    })
  })
})