#!/usr/bin/env node

const fs = require('fs')

const path = require('path')

const { spawnSync } = require('child_process')

// Usage: node scripts/prepare-commit-msg.cjs <COMMIT_MSG_FILE> <COMMIT_SOURCE>

const [, , commitFile] = process.argv

if (!commitFile) process.exit(0)

try {

const original = fs.readFileSync(commitFile, 'utf8')

// If message is already present, do nothing

if (original && original.trim().length > 0) {

process.exit(0)

}

// Call the generator script which writes the commit message to stdout

const generator = path.join(process.cwd(), 'scripts', 'generate-commit.js')

if (!fs.existsSync(generator)) {

console.log(

'Kokonut Commit hook: generator not found. Run `npm run install-hook` and implement generator.'

)

process.exit(0)

}

const res = spawnSync(process.execPath, [generator], { encoding: 'utf8' })

if (res.error) {

console.error(

'Kokonut Commit hook generator failed:',

res.error.message

)

process.exit(0)

}

const msg = (res.stdout || '').trim()

if (msg) {

fs.writeFileSync(commitFile, msg + '\n')

console.log('Kokonut Commit hook: commit message generated')

}

process.exit(0)

} catch (e) {

console.error('prepare-commit-msg hook error:', e.message)

process.exit(0)

}