/**
 * 扫描 DIY 微页面目录 → .build/diy-component-registry.json + .build/diy-component-registry.generated.ts
 */
const fs = require('fs')
const path = require('path')
const { ROOT, BUILD_DIR, listAddonKeys } = require('./addon-utils.cjs')
const { scanAllDiyComponents } = require('./diy-component-scan.cjs')

const OUT_JSON = path.join(BUILD_DIR, 'diy-component-registry.json')
const OUT_TS = path.join(BUILD_DIR, 'diy-component-registry.generated.ts')

// App 构建替换文件（消除 import.meta.glob，避免 IIFE code-splitting 冲突）
const OUT_APP_REGISTRY = path.join(BUILD_DIR, 'diy-component-registry.dev.app.ts')
const OUT_APP_GLOBS_APP = path.join(BUILD_DIR, 'diy-component-globs.app.ts')
const OUT_APP_GLOBS_DEV = path.join(BUILD_DIR, 'diy-component-globs.dev.ts')

function generateDiyRegistry(options = {}) {
    const addonKeys = options.addonKeys || listAddonKeys()
    const { app, addon, all } = scanAllDiyComponents({ addonKeys })

    const payload = {
        version: 2,
        generatedAt: new Date().toISOString(),
        appCount: app.length,
        addonCount: addon.length,
        components: all
    }

    fs.mkdirSync(BUILD_DIR, { recursive: true })
    fs.writeFileSync(OUT_JSON, JSON.stringify(payload, null, 2), 'utf-8')

    const tsBody = `/* AUTO-GENERATED by generate-diy-registry.cjs — do not edit */
export interface DiyComponentMeta {
    vueComponentName: string
    scope: 'app' | 'addon'
    folder: string
    addonKey?: string
    scrollBool?: boolean
    formRef?: boolean
}

export const DIY_COMPONENT_REGISTRY: DiyComponentMeta[] = ${JSON.stringify(all, null, 4)} as DiyComponentMeta[]

export const DIY_COMPONENT_MAP: Record<string, DiyComponentMeta> = {
${all.map((e) => `    '${e.vueComponentName}': ${JSON.stringify(e)}`).join(',\n')}
}
`
    fs.writeFileSync(OUT_TS, tsBody, 'utf-8')

    console.log(
        `[generate-diy-registry] ${all.length} components (app ${app.length}, addon ${addon.length}) -> ${path.relative(ROOT, OUT_JSON)}`
    )

    // ===== 生成 App 构建替换文件（用静态 import 替代 import.meta.glob） =====

    // 1) diy-component-registry.dev 替换 → 直接读取 generated 文件
    const registryAppReplacement = `/* AUTO-GENERATED — App 构建替换，不使用 import.meta.glob */
import '../src/utils/pinia-preinit'
import type { DiyComponentMeta } from '../src/utils/diy-component-types'
import { DIY_COMPONENT_MAP } from './diy-component-registry.generated'

export function resolveDiyMeta(componentName: string): DiyComponentMeta | null {
    if (!componentName) return null
    return DIY_COMPONENT_MAP[componentName] ?? null
}

export function listDiyComponentNames() {
    return Object.keys(DIY_COMPONENT_MAP)
}
`
    fs.writeFileSync(OUT_APP_REGISTRY, registryAppReplacement, 'utf-8')
    console.log(`[generate-diy-registry] App registry -> ${path.relative(ROOT, OUT_APP_REGISTRY)}`)

    // 2) diy-component-globs.app 替换 → 静态 import 所有 app 级组件
    const appCompImports = app
        .map(
            (c) =>
                `import _${c.vueComponentName} from '../src/app/components/diy/${c.folder}/index.vue'`
        )
        .join('\n')
    const appCompLoaders = app
        .map(
            (c) =>
                `    '../app/components/diy/${c.folder}/index.vue': () => Promise.resolve({ default: _${c.vueComponentName} })`
        )
        .join(',\n')

    const appGlobsReplacement = `/* AUTO-GENERATED — App 构建替换，用静态 import 替代 import.meta.glob */
import '../src/utils/pinia-preinit'
import type { Component } from 'vue'

type DiyModuleLoader = () => Promise<{ default: Component }>

${appCompImports}

export const appDiyLoaders: Record<string, DiyModuleLoader> = {
${appCompLoaders}
}

export function appDiyGlobKey(folder: string) {
    return \`../app/components/diy/\${folder}/index.vue\`
}

export function getAppDiyLoader(folder: string) {
    return appDiyLoaders[appDiyGlobKey(folder)]
}
`
    fs.writeFileSync(OUT_APP_GLOBS_APP, appGlobsReplacement, 'utf-8')
    console.log(`[generate-diy-registry] App globs.app -> ${path.relative(ROOT, OUT_APP_GLOBS_APP)}`)

    // 3) diy-component-globs.dev 替换 → 静态 import 所有 addon 级组件 + re-export app globs
    const addonCompImports = addon
        .map(
            (c) =>
                `import _${c.vueComponentName} from '../src/addon/${c.addonKey}/components/diy/${c.folder}/index.vue'`
        )
        .join('\n')
    const addonCompLoaders = addon
        .map(
            (c) =>
                `    '../addon/${c.addonKey}/components/diy/${c.folder}/index.vue': () => Promise.resolve({ default: _${c.vueComponentName} })`
        )
        .join(',\n')

    const devGlobsReplacement = `/* AUTO-GENERATED — App 构建替换，用静态 import 替代 import.meta.glob */
import '../src/utils/pinia-preinit'
import type { Component } from 'vue'
import { appDiyLoaders, getAppDiyLoader } from './diy-component-globs.app'

export { appDiyLoaders, getAppDiyLoader }

type DiyModuleLoader = () => Promise<{ default: Component }>

${addonCompImports}

export const addonDiyLoaders: Record<string, DiyModuleLoader> = {
${addonCompLoaders}
}

export function addonDiyGlobKey(addonKey: string, folder: string) {
    return \`../addon/\${addonKey}/components/diy/\${folder}/index.vue\`
}

export function getAddonDiyLoader(addonKey: string, folder: string) {
    return addonDiyLoaders[addonDiyGlobKey(addonKey, folder)]
}
`
    fs.writeFileSync(OUT_APP_GLOBS_DEV, devGlobsReplacement, 'utf-8')
    console.log(`[generate-diy-registry] App globs.dev -> ${path.relative(ROOT, OUT_APP_GLOBS_DEV)}`)
}

if (require.main === module) {
    generateDiyRegistry()
}

module.exports = { generateDiyRegistry, OUT_JSON, OUT_TS, OUT_APP_REGISTRY, OUT_APP_GLOBS_APP, OUT_APP_GLOBS_DEV }