import { fileURLToPath, URL } from 'node:url'
import { createRequire } from 'node:module'
import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

const require = createRequire(import.meta.url)
const { sharedExternalForBuild } = require('./scripts/shared-external.cjs')

const pkgKey = process.env.SHARED_PKG || 'vue'
const emptyOutDir = process.env.SHARED_EMPTY === '1'

const entry = fileURLToPath(new URL(`./.build/shared/${pkgKey}.ts`, import.meta.url))
const outName = pkgKey === 'icons-vue' ? 'icons-vue' : pkgKey

const needsCore = pkgKey === 'admin-lang' || pkgKey === 'core-shared'

/** 单包 shared ESM 构建，peer 依赖保持 external 由 import map 解析 */
export default defineConfig({
    publicDir: false,
    define: {
        'process.env.NODE_ENV': JSON.stringify('production'),
        __VUE_OPTIONS_API__: true,
        __VUE_PROD_DEVTOOLS__: false,
        __VUE_PROD_HYDRATION_MISMATCH_DETAILS__: false
    },
    resolve: needsCore
        ? {
            alias: {
                '@': fileURLToPath(new URL('./src', import.meta.url)),
                'vue-i18n': 'vue-i18n/dist/vue-i18n.cjs.js'
            }
        }
        : undefined,
    plugins: needsCore
        ? [
            vue(),
            {
                name: 'shared-exclude-addon',
                enforce: 'pre',
                resolveId(source) {
                    if (source.includes('*')) return null
                    const norm = source.replace(/\\?vue.*$/, '').replace(/\\/g, '/')
                    if (norm.startsWith('@/addon/') || norm.includes('/src/addon/')) {
                        return { id: 'virtual:addon-empty', moduleSideEffects: false }
                    }
                    return null
                },
                load(id) {
                    if (id === 'virtual:addon-empty') return 'export default {}'
                    return null
                }
            }
        ]
        : [],
    build: {
        outDir: 'dist/.shared',
        emptyOutDir,
        lib: {
            entry,
            formats: ['es'],
            fileName: () => `${outName}.js`
        },
        rollupOptions: {
            external: sharedExternalForBuild(pkgKey)
        }
    }
})