#!/usr/bin/env bun
// Usage: bun scripts/build.ts [--all | --target=<name>]
//   No flags: builds for current platform (dist/toes)
//   --all: builds for all targets (macos-arm64, macos-x64, linux-arm64, linux-x64)
//   --target=toes-macos-arm64: builds specific target
import { existsSync, mkdirSync } from 'fs'
import { join } from 'path'

const DIST_DIR = join(import.meta.dir, '..', 'dist')
const ENTRY_POINT = join(import.meta.dir, '..', 'src', 'cli', 'index.ts')

interface BuildTarget {
  arch: string
  name: string
  os: string
}

const TARGETS: BuildTarget[] = [
  { os: 'darwin', arch: 'arm64', name: 'toes-macos-arm64' },
  { os: 'darwin', arch: 'x64', name: 'toes-macos-x64' },
  { os: 'linux', arch: 'arm64', name: 'toes-linux-arm64' },
  { os: 'linux', arch: 'x64', name: 'toes-linux-x64' },
]

// Ensure dist directory exists
if (!existsSync(DIST_DIR)) {
  mkdirSync(DIST_DIR, { recursive: true })
}

// Parse command line args
const args = process.argv.slice(2)
const buildAll = args.includes('--all')
const targetArg = args.find(arg => arg.startsWith('--target='))?.split('=')[1]

async function buildTarget(target: BuildTarget) {
  console.log(`Building ${target.name}...`)

  const output = join(DIST_DIR, target.name)

  const proc = Bun.spawn([
    'bun',
    'build',
    ENTRY_POINT,
    '--compile',
    '--target',
    'bun',
    '--minify',
    '--sourcemap=external',
    '--outfile',
    output,
  ], {
    stdout: 'inherit',
    stderr: 'inherit',
    env: {
      ...process.env,
      BUN_TARGET_OS: target.os,
      BUN_TARGET_ARCH: target.arch,
    },
  })

  const exitCode = await proc.exited

  if (exitCode === 0) {
    console.log(`✓ Built ${target.name}`)
  } else {
    console.error(`✗ Failed to build ${target.name}`)
    process.exit(exitCode)
  }
}

async function buildCurrent() {
  const platform = process.platform
  const arch = process.arch

  console.log(`Building for current platform (${platform}-${arch})...`)

  const output = join(DIST_DIR, 'toes')

  const proc = Bun.spawn([
    'bun',
    'build',
    ENTRY_POINT,
    '--compile',
    '--target',
    'bun',
    '--minify',
    '--sourcemap=external',
    '--outfile',
    output,
  ], {
    stdout: 'inherit',
    stderr: 'inherit',
  })

  const exitCode = await proc.exited

  if (exitCode === 0) {
    console.log(`✓ Built toes at ${output}`)
    console.log('\nTo install globally:')
    console.log(`  sudo cp ${output} /usr/local/bin/toes`)
  } else {
    console.error('✗ Build failed')
    process.exit(exitCode)
  }
}

// Main build logic
if (buildAll) {
  console.log('Building for all targets...\n')
  for (const target of TARGETS) {
    await buildTarget(target)
  }
  console.log('\n✓ All builds complete')
} else if (targetArg) {
  const target = TARGETS.find(t => t.name === targetArg)
  if (!target) {
    console.error(`Unknown target: ${targetArg}`)
    console.error('Available targets:')
    for (const t of TARGETS) {
      console.error(`  ${t.name}`)
    }
    process.exit(1)
  }
  await buildTarget(target)
} else {
  await buildCurrent()
}