import { eq } from 'drizzle-orm'
import { useDB, schema } from '../../../utils/db.js'
import { requireAdmin } from '../../../utils/auth.js'

/**
 * 更新 site_content JSON 数组中的单个条目
 * PUT /api/admin/site-content/item
 * body: { key, path, index, item }
 */
export default defineEventHandler(async (event) => {
  requireAdmin(event)
  const body = await readBody(event)
  const { key, path, index, item } = body

  if (!key || index === undefined || !item) {
    throw createError({ statusCode: 422, message: 'key, index, item 参数必填' })
  }

  const db = useDB()
  const row = db.select().from(schema.siteContent).where(eq(schema.siteContent.key, key)).get()
  if (!row) throw createError({ statusCode: 404, message: '未找到配置' })

  const data = JSON.parse(row.data)
  const idx = Number(index)

  // 定位到目标数组
  if (path) {
    const keys = path.split('.')
    let parent = data
    for (let i = 0; i < keys.length - 1; i++) parent = parent[keys[i]]
    const lastKey = keys[keys.length - 1]
    if (!Array.isArray(parent[lastKey])) throw createError({ statusCode: 422, message: 'path 不是数组' })
    if (idx < 0 || idx >= parent[lastKey].length) throw createError({ statusCode: 404, message: '索引超出范围' })
    parent[lastKey][idx] = item
  } else {
    if (!Array.isArray(data)) throw createError({ statusCode: 422, message: 'root 不是数组' })
    if (idx < 0 || idx >= data.length) throw createError({ statusCode: 404, message: '索引超出范围' })
    data[idx] = item
  }

  db.update(schema.siteContent)
    .set({ data: JSON.stringify(data), updatedAt: new Date().toISOString() })
    .where(eq(schema.siteContent.key, key))
    .run()

  return { success: true }
})