import { sql, SQL } from "bun";
import { Hono } from "hono";
import { validator } from "hono/validator";
import { checkAdmin } from "./utils/admin";
import { addUser, checkUser, getAllUser } from "./utils/user";
import { responseStr } from "./const/response_str";
import { checkEnv } from "./utils/env";

checkEnv()
const appTmp = new Hono()
const app = appTmp.basePath("/auth")
const db = new SQL({
    "adapter": "mariadb",
    "host": Bun.env.DB_HOST ?? "localhost",
    "user": Bun.env.DB_USER_NAME ?? "root",
    "password": Bun.env.DB_USER_PASSWD ?? "root",
    "database": Bun.env.DB_NAME ?? "user_auth",
    "allowPublicKeyRetrieval": true
})

// 鉴权
app.get(
    "/",
    validator("query", async (val, c) => {
        const name = val.name ?? ""
        const passwd = val.passwd ?? ""
        // 判空
        if (name == null ||
            name == "" ||
            passwd == null ||
            passwd == ""
        ) {
            c.status(401)
            return c.json({
                "msg": responseStr.REQ_PARAM_ERR
            })
        }
    }),
    async (c) => {
        const req = c.req.query()
        const name = req.name ?? ""
        const passwd = req.passwd ?? ""
        const re = await checkUser(db, name.toString(), passwd.toString())
        if (!re) {
            c.status(401)
            return c.json({
                "msg": responseStr.USER_INVALID
            })
        }

        return c.json({
            "code": 200,
            "msg": "ok"
        })
    }
)

// 查询所有用户
app.get(
    "/user",
    validator("query", async (val, c) => {
        const adminName = val.admin_name ?? ""
        const adminPasswd = val.admin_passwd ?? ""
        // 判空
        if (adminName == null ||
            adminName == "" ||
            adminPasswd == null ||
            adminPasswd == ""
        ) {
            c.status(401)
            return c.json({
                "msg": responseStr.REQ_PARAM_ERR
            })
        }

        // 验证是否是合法管理员
        const re = await checkAdmin(db, adminName.toString(), adminPasswd.toString())
        if (re) {
            return val
        } else {
            c.status(401)
            return c.json({
                "msg": responseStr.ADMIN_INVALID
            })
        }
    }),
    async (c) => {
        const re = await getAllUser(db)
        return c.json({
            "msg": "ok",
            "data": re
        })
    }
)

// 添加用户
app.post(
    "/user",
    validator("json", (val, c) => {
        if (
            val.name == null ||
            val.name == "" ||
            val.passwd == null ||
            val.passwd == ""
        ) {
            c.status(400)
            c.status(400)
            return c.json({
                "code": 400,
                "msg": responseStr.REQ_PARAM_ERR
            })
        } else {
            return val
        }
    }),
    async (c) => {
        const reqHeader = c.req.query()
        const adminName = reqHeader.admin_name ?? ""
        const adminPasswd = reqHeader.admin_passwd ?? ""
        if (!(await checkAdmin(db, adminName, adminPasswd))) {
            c.status(401)
            return c.json({
                "code": 401,
                "msg": responseStr.ADMIN_INVALID
            })
        }

        const req = await c.req.json()
        const name: string = req.name ?? ""
        const passwd: string = req.passwd ?? ""


        if (name.length <= 0 || name.length >= 11) {
            c.status(400)
            return c.json({
                "code": 400,
                "msg": responseStr.USER_NAME_LENGTH_LIMIT
            })
        }

        if (passwd.length <= 0 || passwd.length >= 31) {
            c.status(400)
            return c.json({
                "code": 400,
                "msg": responseStr.USER_NAME_LENGTH_LIMIT
            })
        }

        const re = await addUser(db, name, passwd)
        if (re.state != 0) {
            c.status(500)
            return c.json({
                "code": 500,
                "msg": re.msg
            })
        }
        return c.json({
            "code": 200,
            "msg": "ok"
        })
    }
)


// 添加管理员
app.post(
    "/admin",
    validator("json", (val, c) => {
        if (
            val.name == null ||
            val.name == "" ||
            val.passwd == null ||
            val.passwd == ""
        ) {
            c.status(400)
            c.status(400)
            return c.json({
                "code": 400,
                "msg": responseStr.REQ_PARAM_ERR
            })
        } else {
            return val
        }
    }),
    async (c) => {
        const req = await c.req.json()
        const name: string = req.name ?? ""
        const passwd: string = req.passwd ?? ""

        if (name.length <= 0 || name.length >= 11) {
            c.status(400)
            return c.json({
                "code": 400,
                "msg": responseStr.USER_NAME_LENGTH_LIMIT
            })
        }

        if (passwd.length <= 0 || passwd.length >= 31) {
            c.status(400)
            return c.json({
                "code": 400,
                "msg": responseStr.USER_NAME_LENGTH_LIMIT
            })
        }

        const encryptPasswd = await Bun.password.hash(passwd)
        try {
            await db`insert into admin(name, passwd) values(${name}, ${encryptPasswd})`
        } catch (e) {
            c.status(500)
            return c.json({
                "code": 500,
                "msg": responseStr.SERVER_INTERNAL_ERR
            })
        }
        return c.json({
            "code": 200,
            "msg": "ok"
        })
    }
)

export default {
    port: 8080,
    fetch: app.fetch
}