package main

import (
	"encoding/json"
	"fmt"

	"github.com/gin-gonic/gin"
	"github.com/line/line-bot-sdk-go/v7/linebot"
	"github.com/rs/zerolog/log"
)

var bot *linebot.Client

func setupLine() {
	var err error
	bot, err = linebot.New(LINE_SECRET, LINE_TOKEN)
	if err != nil {
		panic(err)
	}
}

func webhook(c *gin.Context) {
	events, err := bot.ParseRequest(c.Request)
	if err != nil {
		panic(err)
	}

	if flagDev {
		data, _ := json.MarshalIndent(events, "", "  ")
		fmt.Println(string(data))
	}

	for _, event := range events {
		if event.Type == linebot.EventTypeFollow {
			Follow(event)
		}
	}

	OK(c, "ok")
}

func Follow(event *linebot.Event) {
	// add user
	uid := event.Source.UserID
	usr := &User{
		ID: uid,
	}

	row := DB.Exec("select id from users where id = ?", uid).RowsAffected
	if row == 0 {
		// 新用戶
		if err := DB.Create(usr).Error; err != nil {
			log.Error().Err(err).Msg("Follow error.")
		}
	} else {
		// 舊用戶
		log.Debug().Str("user", uid).Msg("user unblocked.")
	}

	// Welcome and ask for
}