import { describe, it, expect } from 'vitest'
import { readFileSync } from 'node:fs'
import { execFileSync } from 'node:child_process'
import { fileURLToPath } from 'node:url'
import path from 'node:path'

const EXT_DIR = path.join(path.dirname(fileURLToPath(import.meta.url)), '..')
const read = (name) => JSON.parse(readFileSync(path.join(EXT_DIR, name), 'utf8'))
const readText = (...seg) => readFileSync(path.join(EXT_DIR, ...seg), 'utf8')

// Only the git-free subcommands are exercised here: `version`/`patch` shell out
// to git, and the extension lane runs on node:24-bookworm-slim which may not
// ship it. Those two are covered where git is guaranteed — ci.yml and build.yml
// run on ci-python.
const packaging = (cmd) =>
  execFileSync('sh', [path.join(EXT_DIR, 'scripts', 'packaging.sh'), cmd], {
    cwd: EXT_DIR,
    encoding: 'utf8'
  })
    .trim()
    .split(/\s+/)
    .filter(Boolean)

describe('packaging.sh — the single definition of what ships', () => {
  it('emits an ignore list and a pathspec that agree on the tracked files', () => {
    const ignore = packaging('ignore')
    const pathspec = packaging('pathspec').map((e) => e.replace(':(exclude)extension/', ''))

    // Every git-excluded path must also be hidden from web-ext. The reverse is
    // not required: node_modules and web-ext-artifacts are build output git
    // never tracks, so they appear only in the ignore list.
    for (const entry of pathspec) {
      expect(ignore, `pathspec has "${entry}" but --ignore-files does not`).toContain(entry)
    }
    expect(pathspec.length).toBeGreaterThan(0)
    expect(ignore).toContain('node_modules')
  })

  it('emits glob patterns literally, never expanded against the working tree', () => {
    // The script iterates its lists with deliberate word-splitting, so it must
    // run with pathname expansion off. Without that, invoking it from a cwd
    // where test/ exists (exactly how ci.yml and vitest call it) expands
    // `test/**` into the individual spec files, and the pathspec silently stops
    // covering anything added later.
    const pathspec = packaging('pathspec')
    expect(pathspec).toContain(':(exclude)extension/test/**')
    expect(pathspec).toContain(':(exclude)extension/scripts/**')
    expect(pathspec.some((e) => e.includes('.spec.js'))).toBe(false)
    expect(pathspec.some((e) => e.includes('helpers'))).toBe(false)
  })

  it('keeps its own scripts and specs out of the XPI', () => {
    // Both are repo infrastructure. web-ext packages everything not ignored, so
    // omitting either would ship dev tooling to users -- and `test/**` in
    // particular only survives because callers `set -f` before substituting it.
    const ignore = packaging('ignore')
    expect(ignore).toContain('vitest.config.js')
    // Both forms per directory. The glob covers the contents; the bare name
    // covers the directory ENTRY, which web-ext writes separately — with only
    // the glob, the XPI carries an empty `test/` and `scripts/`.
    for (const dir of ['test', 'scripts']) {
      expect(ignore, `${dir} contents`).toContain(`${dir}/**`)
      expect(ignore, `${dir} directory entry`).toContain(dir)
    }
  })
})

describe('consumers delegate rather than keeping their own copy', () => {
  // These assertions are the actual anti-regression value: it is easy for a
  // future edit to "simplify" by inlining a literal list again, which silently
  // reintroduces the drift that issue #2397 was about.
  it('package.json derives --ignore-files from the script', () => {
    for (const [name, script] of Object.entries(read('package.json').scripts)) {
      if (!script.includes('--ignore-files')) continue
      expect(script, `${name} should call packaging.sh`).toContain('scripts/packaging.sh ignore')
      expect(script, `${name} must set -f before the substitution`).toMatch(/set -f;/)
    }
  })

  it('ci.yml derives its pathspec from the script and hardcodes none', () => {
    const ci = readText('..', '.forgejo', 'workflows', 'ci.yml')
    expect(ci).toContain('extension/scripts/packaging.sh pathspec')
    // A literal :(exclude)extension/... in the workflow means someone bypassed
    // the shared definition.
    expect(ci).not.toMatch(/:\(exclude\)extension\//)
  })
})

describe('extension version', () => {
  it('keeps manifest.json and package.json in lockstep', () => {
    expect(read('manifest.json').version).toBe(read('package.json').version)
  })

  it('uses a plain dotted numeric version AMO will accept', () => {
    expect(read('package.json').version).toMatch(/^\d+(\.\d+)*$/)
  })

  it('declares manifest v3', () => {
    expect(read('manifest.json').manifest_version).toBe(3)
  })

  it('lists every background script that exists, in dependency order', () => {
    // url.js must load BEFORE api.js: api.js calls normalizeApiUrl at
    // init()-time, and these are classic scripts sharing one scope, so a
    // reordering here is a runtime ReferenceError with no build-time signal.
    const scripts = read('manifest.json').background.scripts
    for (const rel of scripts) {
      expect(() => readFileSync(path.join(EXT_DIR, rel)), `missing ${rel}`).not.toThrow()
    }
    expect(scripts.indexOf('lib/url.js')).toBeLessThan(scripts.indexOf('lib/api.js'))
  })
})