import { execSync } from 'node:child_process'
import { readFileSync } from 'node:fs'
import { fileURLToPath, URL } from 'node:url'
import { defineConfig, type Plugin } from 'vite'
import vue from '@vitejs/plugin-vue'

function resolveReleaseDate(): string {
  try {
    const pkg = JSON.parse(
      readFileSync(fileURLToPath(new URL('./package.json', import.meta.url)), 'utf-8')
    ) as { version: string }
    const tagged = execSync(`git log -1 --format=%cs v${pkg.version}`, {
      encoding: 'utf-8',
      stdio: ['ignore', 'pipe', 'ignore'],
    }).trim()
    if (tagged) return tagged
  } catch {
    /* fall through */
  }
  return new Date().toISOString().slice(0, 10)
}

function docsReleaseDatePlugin(): Plugin {
  const releaseDate = resolveReleaseDate()
  const id = 'virtual:docs-release-date'
  const resolved = '\0' + id
  return {
    name: 'docs-release-date',
    resolveId(source) {
      if (source === id) return resolved
    },
    load(loadId) {
      if (loadId === resolved) {
        return `export const releaseDate = ${JSON.stringify(releaseDate)}\n`
      }
    },
  }
}

export default defineConfig({
  plugins: [vue(), docsReleaseDatePlugin()],
  root: 'playground',
  base: './',
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('.', import.meta.url)),
    },
  },
  build: {
    outDir: '../playground-dist',
    emptyOutDir: true,
  },
})