package foundry

import (
	"database/sql"
	"errors"
	"fmt"
	"io"
	"log/slog"
	"net/http"
	"net/url"
	"strconv"
	"strings"

	"gitea.local.lab/Lbenedar/foundry_helper_service/internal/foundry/requests"
	"gitea.local.lab/Lbenedar/foundry_helper_service/internal/foundry/types"
	"github.com/gorilla/websocket"
)

type Foundry struct {
	//TODO: make check of admin's authentication
	isAuth bool

	logger *slog.Logger
	config requests.Config
	ws     *webSocketUtil
}

func NewFoundry() *Foundry {
	foundry := &Foundry{config: requests.Config{SessionID: ""}, isAuth: false, ws: NewWebSocketUtil()}

	// err := foundry.config.GetSessionId()
	// if err != nil {
	// 	return nil, err
	// }
	return foundry
}

func (foundry *Foundry) checkAuthRespAnswer(r io.Reader, respLength int) error {
	authBody := make([]byte, respLength)

	_, err := r.Read(authBody)
	if err != nil && err != io.EOF {
		return err
	}

	if !strings.Contains(string(authBody), "Admin authentication successful") {
		return ErrorAuthPassWrong
	}
	foundry.isAuth = true
	return nil
}

func (foundry *Foundry) Authenticate() error {
	if foundry.config.SessionID == "" {
		err := foundry.config.GetSessionId()
		if err != nil {
			return err
		}
	}

	resp, err := foundry.config.PostAuthenticationData()
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	contentLen, err := strconv.Atoi(resp.Header.Get("Content-Length"))
	if err != nil {
		return err
	}

	return foundry.checkAuthRespAnswer(resp.Body, contentLen)
}

func (foundry *Foundry) StartListen() error {
	foundry.ws.channels = *types.InitWsChannels()

	wsChannels := &foundry.ws.channels
	defer wsChannels.Close()
	go foundry.ListenAndServeWS()

	var err error
	for {
		select {
		// case msg, ok := <-foundry.ws.channels.Msg():
		// 	if !ok {
		// 		time.Sleep(5 * time.Microsecond)
		// 		continue
		// 	}
		// 	var foundryState *json_model.FoundryState
		// 	foundryState, err = json_model.ParseSetupModel(msg.ToByteSlice())
		// 	if err != nil {
		// 		return nil
		// 	}
		// 	foundry.models.FoundryState.Insert(foundryState)
		case err = <-wsChannels.Err():
			var foundryErr *FoundryError
			if errors.As(err, &foundryErr) {
				if foundryErr.IsFatal {
					foundry.CloseWebSocketConn()
					return foundryErr
				}
				foundry.logger.Warn("Got error when listening or served websocket", "err", err.Error())
			}
		case <-wsChannels.Done():
			foundry.CloseWebSocketConn()
			return ListenIsDone
		}
	}
}

func (foundry *Foundry) ConnectToFoundry() error {
	var err error

	if foundry == nil {
		return ErrorFoundryNotInit
	}
	ok, err := (*foundry).config.GetSessionToken()
	if err != nil {
		return err
	}

	if (*foundry).config.Password != "" && !ok {
		err := (*foundry).Authenticate()
		if err != nil {
			return err
		}
	}

	foundry.logger.Info("Successefully connected to Foundry", "host", foundry.config.Host)
	return nil
}

func (foundry *Foundry) ConnectToWebSocket() error {
	if !foundry.isAuth {
		return ErrorNotAuth
	}

	query := url.Values{}
	query.Add("session", foundry.config.SessionID)
	query.Add("EIO", "4")
	query.Add("transport", "websocket")

	u := url.URL{Scheme: "ws", Host: foundry.config.Host, Path: fmt.Sprintf("%s/", requests.SocketPath), RawQuery: query.Encode()}

	wsHeader := http.Header{}
	wsHeader.Set("Cookie", fmt.Sprintf("session=%s", foundry.config.SessionID))

	wsConn, _, err := websocket.DefaultDialer.Dial(u.String(), wsHeader)
	if err != nil {
		return err
	}

	foundry.ws.wsConn = wsConn
	foundry.ws.currWsId = 0
	foundry.logger.Info("Successefully connected to Foundry Websocket")
	return nil
}

func (foundry *Foundry) CloseWebSocketConn() {
	foundry.ws.wsConn.Close()
}

func (foundry *Foundry) ListenAndServeWS() {
	go foundry.ws.ListenWebSocket()
	foundry.ws.ServeWebSocket()
}

func (foundry *Foundry) HandleWSRequest(msgType string) ([]byte, error) {
	msg := foundry.ws.CreateWSMessageByPage(msgType)

	return foundry.ws.HandleWebsocketRequest(msg)
}

func (foundry *Foundry) HasSessionId() bool {
	return foundry.config.SessionID != ""
}

func (foundry *Foundry) SetUpSessionId() error {
	return foundry.config.GetSessionId()
}

func (foundry *Foundry) SetConfig(config *requests.Config) {
	foundry.config = *config
}

func (foundry *Foundry) SetLogger(slogger *slog.Logger) {
	foundry.logger = slogger
	foundry.ws.logger = slogger
}

func (foundry *Foundry) CreateNewDataModels(db *sql.DB) {
	foundry.ws.CreateNewDataModels(db)
}

// /**
//    * Poll the server to see if a World has become active, and automatically refresh if so.
//    * @returns {Promise<void>}
//    */
//   async #pollActive() {
//     const poll = () => {
//       const status = foundry.utils.getRoute("/api/status");
//       this.#activePollState.last = Date.now();
//       this.#activePollState.polling = foundry.utils.fetchJsonWithTimeout(status, {}, {
//         timeoutMs: 10000
//       }).catch(() => {});
//       this.#pollActive();
//     };