package main

import (
	"bytes"
	"crypto/tls"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
)

type plexStats struct {
	currentSessions float64
	numMovies       float64
	numTV           float64
}

type PlexClient struct {
	baseUrl   string
	client    *http.Client
	plexToken string
}

func setupClient(settings *serverSettings) PlexClient {
	transCfg := &http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
	}

	return PlexClient{
		baseUrl:   settings.plexAddr,
		client:    &http.Client{Transport: transCfg},
		plexToken: settings.plexToken,
	}

}

// sendRequest sends a request and resturns response (always assuming a get request)
func (pc *PlexClient) sendRequest(url string, body []byte) (result []byte) {
	fullUrl := pc.baseUrl + url
	req, err := http.NewRequest("GET", fullUrl, bytes.NewBuffer(body))
	if err != nil {
		fmt.Println("Error creating new request", err)
		return
	}
	req.Header.Add("Accept", "application/json")
	q := req.URL.Query()
	q.Add("X-Plex-Token", pc.plexToken)
	req.URL.RawQuery = q.Encode()
	res, err := pc.client.Do(req)
	if err != nil {
		fmt.Println("Error sending request", err)
		return
	}
	defer res.Body.Close()
	resBody, err := io.ReadAll(res.Body)
	if err != nil {
		fmt.Println("Unable to read response body: ", err)
		return
	}
	return resBody

}

func (pc *PlexClient) getActiveSessions() *ActiveSessions {
	result := pc.sendRequest("/status/sessions", nil)
	currentActiveSessions := ActiveSessions{}
	err := json.Unmarshal(result, &currentActiveSessions)
	if err != nil {
		fmt.Println("Error unmarshalling current active sessions: ", err)
	}
	return &currentActiveSessions
}

func (pc *PlexClient) getNumMovies() *ActiveSessions {
	result := pc.sendRequest("/library/sections/3/all", nil) //Hard code library ID for now TODO: Grab from library/sections call
	libraryAll := ActiveSessions{}
	err := json.Unmarshal(result, &libraryAll)
	if err != nil {
		fmt.Println("Error unmarshalling current active sessions: ", err)
	}
	return &libraryAll
}

func (pc *PlexClient) getNumTV() *ActiveSessions {
	result := pc.sendRequest("/library/sections/2/all", nil) //Hard code library ID for now TODO: Grab from library/sections call
	libraryAll := ActiveSessions{}
	err := json.Unmarshal(result, &libraryAll)
	if err != nil {
		fmt.Println("Error unmarshalling current active sessions: ", err)
	}
	return &libraryAll
}

func (pc *PlexClient) gatherAllStats() *plexStats {
	allStats := plexStats{}

	sessionsData := pc.getActiveSessions()
	libraryDetails := pc.getNumMovies()
	tvshowDetails := pc.getNumTV()

	allStats.currentSessions = float64(sessionsData.MediaContainer.Size)
	allStats.numMovies = float64(libraryDetails.MediaContainer.Size)
	allStats.numTV = float64(tvshowDetails.MediaContainer.Size)
	return &allStats
}