package main

import (
	"bufio"
	"encoding/base64"
	"encoding/binary"
	"log"
	"math/rand"
	"os"
	"strconv"

	"srs.epita.fr/fic-server/libfic"
)

func treatSubmission(pathname string, team_id string, exercice_id string) {
	bid := make([]byte, 5)
	binary.LittleEndian.PutUint32(bid, rand.Uint32())
	id := "[" + base64.StdEncoding.EncodeToString(bid) + "]"
	log.Println(id, "New submission receive", pathname)

	if tid, err := strconv.Atoi(team_id); err != nil {
		log.Println(id, "[ERR]", err)
	} else if eid, err := strconv.Atoi(exercice_id); err != nil {
		log.Println(id, "[ERR]", err)
	} else if team, err := fic.GetTeam(tid); err != nil {
		log.Println(id, "[ERR]", err)
	} else if exercice, err := fic.GetExercice(eid); err != nil {
		log.Println(id, "[ERR]", err)
	} else if file, err := os.Open(pathname); err != nil {
		log.Println(id, "[ERR]", err)
	} else {
		defer file.Close()

		cnt := ""
		scanner := bufio.NewScanner(file)
		for scanner.Scan() {
			cnt += scanner.Text()
		}

		if solved, err := exercice.CheckResponse(cnt, team); err != nil {
			log.Println(id, "[ERR]", err)
		} else if solved {
			exercice.Solved(team)
			log.Printf("%s Team %d SOLVED exercice %d\n", id, team.Id, exercice.Id)
			if err := os.Remove(pathname); err != nil {
				log.Println(id, "[ERR]", err)
			}
		} else {
			log.Printf("%s Team %d submit an invalid solution for exercice %d\n", id, team.Id, exercice.Id)
			if err := os.Remove(pathname); err != nil {
				log.Println(id, "[ERR]", err)
			}
		}
	}
}