package main

import (
	"strconv"
	"strings"

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

func ApiPreparePurchase(event *linebot.Event) {
	text := "沒問題！您知道想投保甚麼險種嗎？我們很樂意為您介紹"
	template := linebot.NewConfirmTemplate(text,
		linebot.NewPostbackAction("我知道", "list-tags", "我知道", ""),
		linebot.NewMessageAction("為我推薦", "為我推薦"))
	msg := linebot.NewTemplateMessage(text, template)
	if _, err := SendMessage(event.ReplyToken, event.Source.UserID, msg); err != nil {
		panic(err)
	}
}

func ApiListCategories(event *linebot.Event) {
	var cats []Category
	DB.Find(&cats)
	buttons := make([]*linebot.QuickReplyButton, len(cats))

	for i, cat := range cats {
		buttons[i] = linebot.NewQuickReplyButton("",
			linebot.NewPostbackAction(cat.Name, "cat="+cat.Name, "", "險種: "+cat.Name))
	}
	msg := linebot.NewTextMessage("請選擇險種。").WithQuickReplies(
		linebot.NewQuickReplyItems(buttons...),
	)
	if _, err := SendMessage(event.ReplyToken, event.Source.UserID, msg); err != nil {
		panic(err)
	}
}
func ApiListProductOfCat(event *linebot.Event) {
	data := event.Postback.Data
	data = strings.TrimPrefix(data, "cat=")

	var prods []Product
	DB.Find(&prods, "id in (select product_id from product_categories where category_name = ?)", data)

	columns := make([]*linebot.CarouselColumn, len(prods))
	for i, prod := range prods {
		columns[i] = linebot.NewCarouselColumn(
			prod.Img, prod.Name, prod.Brief,
			linebot.NewURIAction("保單詳細", flagBase+"/product/"+strconv.Itoa(int(prod.ID))),
			linebot.NewPostbackAction("我要投保", "purchase="+prod.Name, "我要投保", ""),
		)
	}
	template := linebot.NewCarouselTemplate(columns...)

	msg := linebot.NewTemplateMessage("我要投保", template)
	if _, err := SendMessage(event.ReplyToken, event.Source.UserID, msg); err != nil {
		panic(err)
	}
}

func ApiPurchase(event *linebot.Event) {
	data := event.Postback.Data
	data = strings.TrimPrefix(data, "purchase=")
	prod := &Product{}
	if err := DB.Preload("Categories").First(prod, "name = ?", data).Error; err != nil {
		panic(err)
	}

	// show amount and finish purchase
	msg := linebot.NewTextMessage(`好的,
保費試算為: XXX元

請選擇您附近的專業業務員。`)

	var salses []Sales
	DB.Find(&salses)
	columns := make([]*linebot.CarouselColumn, len(salses))
	for i, salse := range salses {
		columns[i] = linebot.NewCarouselColumn(
			salse.Img, salse.Name, salse.Brief,
			linebot.NewPostbackAction("讓我幫你", "sales="+salse.Name+"&"+event.Postback.Data, "讓我幫你", ""),
		)
	}
	template := linebot.NewCarouselTemplate(columns...)

	selectSales := linebot.NewTemplateMessage("選擇專業業務員", template)
	SendMessage(event.ReplyToken, event.Source.UserID, msg, selectSales)
}

func ApiListRecommanded(event *linebot.Event) {
	var prods []Product
	DB.Limit(10).Find(&prods, "id not in (select product_id from orders where user_id = ?)", event.Source.UserID)

	// sort for target user

	// send slide

	columns := make([]*linebot.CarouselColumn, len(prods))
	for i, prod := range prods {
		columns[i] = linebot.NewCarouselColumn(
			prod.Img, prod.Name, prod.Brief,
			linebot.NewURIAction("保單詳細", flagBase+"/product/"+strconv.Itoa(int(prod.ID))),
			linebot.NewPostbackAction("我要投保", "purchase="+prod.Name, "我要投保", ""),
		)
	}
	template := linebot.NewCarouselTemplate(columns...)

	msg := linebot.NewTemplateMessage("我要投保", template)
	SendMessage(event.ReplyToken, event.Source.UserID, msg)
}