// 对外服务
package webservice

import (
	"crypto/tls"
	_ "embed"
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	be "spidercreator/backend"
	bdb "spidercreator/backend/db"
)

const (
	LISTEN_ADDR = ":8080"
)

type (
	SpiderConfigItem struct {
		Key string `json:"key"`
		Css string `json:"css"`
	}
	WebService struct {
		db                  *bdb.SpiderDb
		enf                 be.EventNotifyFace
		currentSpiderConfig *be.SpiderConfig
	}
)

var (
	//go:embed cert.pem
	certBytes []byte
	//go:embed key.pem
	keyBytes []byte
)

// NewWebService
func NewWebService(db *bdb.SpiderDb, enf be.EventNotifyFace, csf *be.SpiderConfig) *WebService {
	return &WebService{db, enf, csf}
}

func (ws *WebService) RunHttpServe() {
	// 设置HTTP服务器
	mux := http.NewServeMux()
	// 解析证书
	cert, err := tls.X509KeyPair(certBytes, keyBytes)
	if err != nil {
		log.Println(err.Error())
		return
	}
	// 创建一个TLS配置
	tlsConfig := &tls.Config{
		// 可以在这里添加其他TLS配置
		Certificates:       []tls.Certificate{cert},
		ServerName:         "localhost",
		InsecureSkipVerify: true,
	}
	server := &http.Server{
		Addr:      LISTEN_ADDR,
		Handler:   mux,
		TLSConfig: tlsConfig,
	}
	//这里注册HTTP服务
	mux.HandleFunc("/save", ws.SaveSpiderConfig)
	mux.HandleFunc("/load", ws.LoadSpiderConfig)
	//
	log.Println("Starting HTTPS server on ", LISTEN_ADDR)
	err = server.ListenAndServeTLS("", "")
	if err != nil {
		log.Println("Failed to start server:  ", err.Error())
		return
	}
}

// LoadCurrentSpiderConfig,json处理
func (ws *WebService) SaveSpiderConfig(w http.ResponseWriter, r *http.Request) {
	log.Println("保存设置")
	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Content-Type", "application/json")
	var req = new(SpiderConfigItem)
	err := json.NewDecoder(r.Body).Decode(req)
	if err != nil {
		log.Println("序列化失败")
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	log.Println("CSS", req.Key, req.Css)
	//TODO 业务操作
	switch req.Key {
	case "listItemCss":
		ws.currentSpiderConfig.ListItemCss = req.Css
	case "listLinkCss":
		ws.currentSpiderConfig.ListLinkCss = req.Css
	case "listPublishTimeCss":
		ws.currentSpiderConfig.ListPubtimeCss = req.Css
	case "listNextPageCss":
		ws.currentSpiderConfig.ListNextPageCss = req.Css
	case "listBodyCss":
		ws.currentSpiderConfig.ListBodyCss = req.Css
	case "titleCss":
		ws.currentSpiderConfig.TitleCss = req.Css
	case "publishUnitCss":
		ws.currentSpiderConfig.PublishUnitCss = req.Css
	case "publishTimeCss":
		ws.currentSpiderConfig.PublishTimeCss = req.Css
	case "contentCss":
		ws.currentSpiderConfig.ContentCss = req.Css
	case "attachCss":
		ws.currentSpiderConfig.AttachCss = req.Css
	}
	fmt.Fprint(w, "{'code':200}")
	ws.db.SaveOrUpdate(ws.currentSpiderConfig)
	//TODO 通知开发工具端，CSS选择器有变动
	ws.enf.Dispatch("spiderConfigChange", ws.currentSpiderConfig)
}

// LoadCurrentSpiderConfig,加载，返回当前配置项
func (ws *WebService) LoadSpiderConfig(w http.ResponseWriter, r *http.Request) {
	log.Println("加载当前配置项")
	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Content-Type", "application/json")
	err := json.NewEncoder(w).Encode(ws.currentSpiderConfig)
	if err != nil {
		log.Println("反向序列化失败")
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
}