package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"log"
	"os"
	"strconv"
	"time"

	"scm.dairydemon.net/filifa/mlblive/internal/statsapi"
)

func feedUpdate(gamePk string, ts *string) (statsapi.Play, error) {
	feed, err := statsapi.Feed(gamePk)
	if err != nil {
		return statsapi.Play{}, err
	}

	*ts = feed.MetaData.TimeStamp
	return feed.LiveData.Plays.CurrentPlay, nil
}

func patchUpdate(patches statsapi.DiffPatchResponse, ts *string) []statsapi.Play {
	var plays []statsapi.Play
	var err error
	for _, patch := range patches {
		var play statsapi.Play
		play.Patch(patch)
		plays = append(plays, play)

		*ts, err = patch.Timestamp()
		if err != nil {
			continue
		}
	}

	return plays
}

func update(gamePk string, ts *string, updateId string) ([]statsapi.Play, error) {
	var plays []statsapi.Play

	patches, err := statsapi.DiffPatch(gamePk, *ts, updateId)
	if err != nil {
		log.Println("feed update")
		var p statsapi.Play
		p, err = feedUpdate(gamePk, ts)
		if err != nil {
			return plays, err
		}

		plays = []statsapi.Play{p}
	} else {
		log.Println("patch update")
		plays = patchUpdate(patches, ts)
	}

	return plays, err
}

func writeTest(v any, ts string) {
	b, err := json.Marshal(v)
	if err != nil {
		log.Println(err)
	}

	os.WriteFile("examples/data/data_"+ts+".json", b, 0644)
}

func getGamePk() string {
	teamId := flag.String("t", "", "team to get updates for")
	flag.Parse()
	if *teamId == "" {
		log.Fatal("need team ID")
	}

	id, ok := statsapi.TeamIds[*teamId]
	if !ok {
		log.Fatal("invalid team ID")
	}

	sched, err := statsapi.Schedule("1", strconv.Itoa(id))
	if err != nil {
		log.Fatal(err)
	}

	gamePk := sched.Dates[0].Games[0].GamePk.String()
	return gamePk
}

func main() {
	gamePk := getGamePk()

	ws, err := statsapi.NewGamedayWebsocket(gamePk)
	if err != nil {
		log.Fatal(err)
	}
	defer ws.Close()

	ch := make(chan error)
	go ws.KeepAlive(10*time.Second, ch)

	var ts string
	_, err = feedUpdate(gamePk, &ts)
	if err != nil {
		log.Fatal(err)
	}

	for {
		var p statsapi.Push
		err := ws.ReadJSON(&p)
		if err != nil {
			log.Fatal(err)
		}

		plays, err := update(gamePk, &ts, p.UpdateId)
		if err != nil {
			log.Println(err)
			continue
		}

		for _, play := range plays {
			result := play.Result
			if result.Event != "" {
				// TODO: figure out format
				// maybe a string format with play/result type?
				// FIXME: proper score on patch updates
				// FIXME: repeated output on feed updates
				fmt.Printf("%v (%v-%v)\n", result.Description, result.AwayScore, result.HomeScore)
			}
		}
	}
}