// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========

import { describe, expect, it } from 'vitest'
import { makeEnv, NATIVE_BACKENDS } from './native_fixture.ts'

const ENC = new TextEncoder()

describe.each(NATIVE_BACKENDS)('native ln (%s backend)', (kind) => {
  it('ln -s -v prints -> arrow', async () => {
    const env = makeEnv(kind)
    try {
      env.createFile('a.txt', ENC.encode('hello'))
      const result = await env.mirage('ln -s -v /data/a.txt /data/link.txt')
      expect(result).toContain('->')
    } finally {
      await env.cleanup()
    }
  })

  it('ln -s -f overwrites existing link', async () => {
    const env = makeEnv(kind)
    try {
      env.createFile('a.txt', ENC.encode('hello'))
      env.createFile('b.txt', ENC.encode('world'))
      await env.mirage('ln -s /data/a.txt /data/link.txt')
      await env.mirage('ln -s -f /data/b.txt /data/link.txt')
      const result = await env.mirage('readlink /data/link.txt')
      expect(result).toContain('/data/b.txt')
    } finally {
      await env.cleanup()
    }
  })

  it('ln -s -n creates a symlink whose target reads back verbatim', async () => {
    const env = makeEnv(kind)
    try {
      env.createFile('a.txt', ENC.encode('hello'))
      const result = await env.mirage(
        'ln -s -n /data/a.txt /data/link.txt && readlink /data/link.txt',
      )
      expect(result).toContain('/data/a.txt')
    } finally {
      await env.cleanup()
    }
  })

  // A symlink target is stored verbatim as typed. GNU: readlink of a link
  // made from `printf '/data/x\ty'` prints the tab back.
  it('ln -s keeps a control character in the target', async () => {
    const env = makeEnv(kind)
    try {
      await env.mirage(`ln -s "$(printf '/data/x\\ty')" /data/tabby`)
      expect(await env.mirage('readlink /data/tabby')).toBe('/data/x\ty\n')
    } finally {
      await env.cleanup()
    }
  })

  it('ln -s keeps a literal backslash in the target', async () => {
    const env = makeEnv(kind)
    try {
      await env.mirage(`ln -s '/data/a\\b' /data/bs`)
      expect(await env.mirage('readlink /data/bs')).toBe('/data/a\\b\n')
    } finally {
      await env.cleanup()
    }
  })
})
