package main

import (
	"fmt"
	"strings"
	"time"

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

func Follow(event *linebot.Event) {
	// add user
	uid := event.Source.UserID
	usr := &User{
		ID: uid,
	}
	Hit("加入", 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.")
			return
		}
		log.Debug().Str("user", uid).Msg("New user.")
	} else {
		// 舊用戶
		log.Debug().Str("user", uid).Msg("user unblocked.")
	}

	// Welcome and ask for profile
	msg := linebot.NewTextMessage("歡迎使用台新人壽智慧聊天服務! 請您協助核對您的身分。")

	// get profiles
	var profs []Profile
	DB.Limit(10).Find(&profs)
	columns := make([]*linebot.CarouselColumn, len(profs))
	for i, prof := range profs {
		columns[i] = linebot.NewCarouselColumn(
			prof.Img, prof.Name, prof.Brief,
			linebot.NewPostbackAction("我是"+prof.Name, "select="+prof.Name, "我是"+prof.Name, ""),
		)
	}
	template := linebot.NewCarouselTemplate(columns...)
	profiles := linebot.NewTemplateMessage("請核對您的身分", template)

	if _, err := SendMessage(event.ReplyToken, uid, msg, profiles); err != nil {
		panic(err)
	}
}

func ApiSelectProfile(event *linebot.Event) {
	uid := event.Source.UserID
	data := event.Postback.Data
	data = strings.TrimPrefix(data, "select=")
	prof := &Profile{}
	if err := DB.First(prof, "name = ?", data).Error; err != nil {
		panic(err)
	}
	DB.Exec("update users set profile_id = ? where id = ?",
		prof.ID, uid)

	greet := linebot.NewTextMessage(fmt.Sprintf("歡迎回來! %v", data))
	msg := linebot.NewStickerMessage("6325", "10979904")

	if _, err := SendMessage(event.ReplyToken, event.Source.UserID,
		greet, msg); err != nil {
		panic(err)
	}

	go func(uid string) {
		time.Sleep(time.Second * 3)
		if _, err := SendMessage("", uid, DefaultMsg()); err != nil {
			panic(err)
		}
	}(event.Source.UserID)
}