package main

import (
	"fmt"
	"log"
	"os"
)

func serveCommand(openID string, in InWechatMsg) (state chatState, processed bool) {
	log.Println("process command")
	return echoCommand(openID, in)
}

func echoCommand(openID string, in InWechatMsg) (state chatState, processed bool) {
	processed = true
	str, err := BuildTextMsg(openID, "default")
	log.Println(in.header.MsgType)
	switch in.body.(type) {
	case TextMsg:
		m := in.body.(TextMsg)
		str, err = BuildTextMsg(openID, m.Content)
	case PicMsg:
		m := in.body.(PicMsg)
		str = buildPicMsg(openID, m.MediaId)

	case VoiceMsg:
		m := in.body.(VoiceMsg)
		str = buildVoiceMsg(openID, m.MediaId)
		kfSendTxt(openID, "翻译结果:"+m.Recognition)
	case VideoMsg:
		m := in.body.(VideoMsg)
		str = buildVideoMsg(openID, "e2iNEiSxCX5TV1WbFd0TQMn5lilY3bylh1--lDBwi7I", "航拍春日哈工大", m.MediaId)
	case ShortVideoMsg:
		m := in.body.(ShortVideoMsg)
		str = buildVideoMsg(openID, "e2iNEiSxCX5TV1WbFd0TQMn5lilY3bylh1--lDBwi7I", "航拍春日哈工大", m.MediaId)
	case LocationMsg:
		m := in.body.(LocationMsg)
		mid := location2MediaID(m.Location_X, m.Location_Y)
		//str, _ = BuildTextMsg(openID, fmt.Sprintf("long=%f, lat=%f, scale=%d", m.Location_X, m.Location_Y, m.Scale))
		// str = buildPicMsg(openID, mid)
		url := location2URL(m.Location_X, m.Location_Y)
		str, _ = BuildTextMsg(openID, mid+"\r\n"+url)
		kfSendTxt(openID, url)

	case LinkMsg:
		m := in.body.(LinkMsg)
		kfSendTxt(openID, m.Title+m.Description)
		str, _ = BuildTextMsg(openID, m.Url)
	case EventMsg:
		return echoEvents(openID, in)
	default:
		str, err = BuildTextMsg(openID, "text message")
	}

	state.OpenID = openID
	state.Procedure = ""
	state.response = str
	log.Println(str)
	if err != nil {
		log.Println("build response failed")
		processed = false
	}
	//state is any state that
	return
}

func echoEvents(openID string, in InWechatMsg) (state chatState, processed bool) {
	processed = true
	str := ""
	m := in.body.(EventMsg)
	log.Println("Event = " + m.Event)
	switch m.Event {
	case "LOCATION":
		mid := location2MediaID(m.Latitude, m.Longitude)
		str = buildPicMsg(openID, mid)
	case "CLICK":
		str, _ = BuildTextMsg(openID, m.EventKey)
	case "subscribe":
	case "unsubscribe":
	case "SCAN":
	case "VIEW":
	default:
		str, _ = BuildTextMsg(openID, " unknown event :"+m.Event)
	}
	state.response = str
	return
}

func location2MediaID(lat, long float64) (mediaID string) {
	url := fmt.Sprintf("https://maps.googleapis.com/maps/api/staticmap?center=%f,%f&markers=color:red|label:S|%f,%f&zoom=17&size=1280x2014", lat, long, lat, long)
	file, _, _ := saveURL(url)
	mediaID = uploadImage(file)
	os.Remove(file)
	return
}

func location2URL(lat, long float64) (url string) {
	url = fmt.Sprintf("http://maps.google.com/maps?z=12&t=m&q=loc:%f+%f", lat, long)
	log.Println(url)
	return
}