package handler

import (
	"encoding/json"
	"fmt"
	"log"
	"math/rand"
	"net/http"
	"strconv"
	"time"

	"github.com/SevereCloud/vksdk/v2/api"
	"github.com/SevereCloud/vksdk/v2/object"
	"github.com/gin-gonic/gin"
	"vk-webhook-flooder-mock/dto"
)

var rnd = rand.New(rand.NewSource(time.Now().UnixNano()))

func UsersGetHandler(c *gin.Context) {
	// Simulate real network latency + VK API latency.
	time.Sleep(time.Millisecond * time.Duration(rnd.Intn(150)+200))

	var req dto.UsersGetRequest
	if err := c.ShouldBind(&req); err != nil {
		log.Printf("invalid users.get request: %s", err)
		c.String(http.StatusBadRequest, "Invalid request data")
		return
	}

	val := api.UsersGetResponse{}
	for _, id := range req.UserIDs {
		uID, _ := strconv.Atoi(id)
		val = append(val, object.UsersUser{
			ID:        uID,
			FirstName: "Mocked",
			LastName:  fmt.Sprintf("Profile #%s", id),
		})
	}

	data, err := json.Marshal(val)
	if err != nil {
		c.Error(err)
		return
	}

	var res api.Response
	res.Response = data

	c.JSON(http.StatusOK, res)
}