/**
 * Shrimp basic-admin demo
 *
 * 用 MemoryShrimpCrud 跑一个零依赖的 admin server,展示:
 *  - Shrimp 核心(模块注册 / RPC dispatch / 权限树)
 *  - ShrimpTableModule + MemoryShrimpCrud 的 CRUD 自动事件
 *  - 通过 Express 暴露成 HTTP RPC
 *
 * 不使用 ShrimpServer/Mongoose/JWT,刻意暴露 ShrimpServer 把太多东西耦合在
 * Express+Mongo+Auth 一起的事实,作为后续重构的对照样本。
 */
import express from "express"
import {
    Shrimp,
    ShrimpTableModule,
    MemoryShrimpCrud,
    ShrimpFieldTypes,
    ShrimpError,
    ShrimpCode,
} from "shrimp-server"
import type { IFieldConfig, WithId } from "shrimp-server"

interface ITag { _id: string; name: string }
interface IProduct { _id: string; code: string; name: string; price: number; tagIds: string[] }

const tagFields: IFieldConfig[] = [
    { key: "name", label: "标签名", type: ShrimpFieldTypes.String, required: true, searchable: true },
]

const productFields: IFieldConfig[] = [
    { key: "code", label: "编码", type: ShrimpFieldTypes.String, required: true, editable: "addOnly" },
    { key: "name", label: "名称", type: ShrimpFieldTypes.String, required: true, searchable: true },
    { key: "price", label: "价格", type: ShrimpFieldTypes.Number, required: true },
    {
        key: "tagIds", label: "标签", type: ShrimpFieldTypes.Relation,
        relation: { moduleKey: "tag", labelKey: "name" }, multiple: true, defaultValue: [],
    },
]

async function bootstrap() {
    const shrimp = new Shrimp()

    const tagCrud = new MemoryShrimpCrud<WithId<ITag>>()
    new ShrimpTableModule(shrimp, "tag", tagCrud, tagFields, "标签管理").initCrud()

    const productCrud = new MemoryShrimpCrud<WithId<IProduct>>()
    new ShrimpTableModule(shrimp, "product", productCrud, productFields, "商品管理").initCrud()

    // 种子数据
    const t1 = await tagCrud.add({ name: "热门" } as any)
    const t2 = await tagCrud.add({ name: "促销" } as any)
    await productCrud.add({ code: "P001", name: "苹果", price: 5, tagIds: [t1._id] } as any)
    await productCrud.add({ code: "P002", name: "香蕉", price: 3, tagIds: [t1._id, t2._id] } as any)

    const app = express()
    app.use(express.json())

    // 简化的 RPC dispatch: POST /api/<...path>  body 是参数数组
    app.post(/^\/api\/.+/, async (req, res) => {
        const path = req.path.replace(/^\/api\//, "").split("/").filter(Boolean)
        const args = Array.isArray(req.body) ? req.body : []
        try {
            const data = await shrimp.call(path, ...args)
            res.json({ code: ShrimpCode.OK, data })
        } catch (e: any) {
            if (e instanceof ShrimpError) {
                res.json({ code: e.code, tip: e.tip })
            } else {
                console.error(e)
                res.json({ code: ShrimpCode.SERVER_ERROR, log: String(e?.message || e) })
            }
        }
    })

    const port = 3100
    app.listen(port, () => {
        console.log(`Shrimp basic-admin demo: http://localhost:${port}`)
        console.log("")
        console.log("# 试试:")
        console.log(`  curl -s -X POST http://localhost:${port}/api/product/list -H 'content-type: application/json' -d '[{}]' | jq`)
        console.log(`  curl -s -X POST http://localhost:${port}/api/tag/list -H 'content-type: application/json' -d '[{}]' | jq`)
        console.log(`  curl -s -X POST http://localhost:${port}/api/product/add -H 'content-type: application/json' -d '[{"code":"P003","name":"橙子","price":4,"tagIds":[]}]' | jq`)
    })
}

bootstrap().catch(err => {
    console.error("bootstrap failed:", err)
    process.exit(1)
})