package main

import (
	"context"
	"fmt"
	"gegio-ue1/model"
	"os"
	"slices"

	"github.com/wailsapp/wails/v2/pkg/runtime"
	"gorm.io/gorm"
)

// App struct
type App struct {
	ctx context.Context
	db  *gorm.DB
}

// NewApp creates a new App application struct
func NewApp(db *gorm.DB) *App {
	return &App{
		db: db,
	}
}

// startup is called when the app starts. The context is saved
// so we can call the runtime methods
func (a *App) startup(ctx context.Context) {
	a.ctx = ctx
}

func (a *App) GetGames() (gs []model.Game, err error) {
	err = a.db.Find(&gs).Error
	return

}

func (a *App) GetTournaments() (ts []model.Tournament, err error) {
	err = a.db.Preload("Game").Find(&ts).Error
	return
}

func (a *App) GetTournament(id int) (t model.Tournament, err error) {
	err = a.db.Preload("Game").Preload("Participants").Preload("Matches").First(&t, id).Error
	return
}
func (a *App) SaveTournament(t model.Tournament) error {
	err := a.db.Save(&t).Error
	return err
}
func (a *App) FillRandom(t model.Tournament) {
	for range t.Size - len(t.Participants) {
		t.Participants = append(t.Participants, &model.Participant{
			Name:        model.RandomName(),
			IsTemporary: true,
			IsTeam:      true,
		})
	}
	a.db.Save(&t.Participants)
	a.db.Save(&t)

}

func (a *App) StartTournament(t model.Tournament) {
	t.TournamentState = 1
	a.SaveTournament(t)
	t, _ = a.GetTournament(int(t.ID))
	matches := make([]model.Match, 0, len(t.Participants)/2)
	for i := range len(t.Participants) / 2 {
		matches = append(matches, model.Match{
			TournamentID:   t.ID,
			Stage:          1,
			Order:          i,
			Participant1ID: t.Participants[i].ID,
			Participant2ID: t.Participants[i+len(t.Participants)/2].ID,
		})
	}
	if len(t.Participants)%2 != 0 {
		matches = append(matches, model.Match{
			TournamentID:   t.ID,
			Stage:          1,
			Order:          len(t.Participants)/2 + 1,
			Participant1ID: t.Participants[len(t.Participants)-1].ID,
			Participant2ID: t.Participants[len(t.Participants)-1].ID,
		})
	}
	a.db.Save(matches)
}

func (a *App) ExportTournament(t model.Tournament) {
	dirname, _ := os.UserHomeDir()
	str, err := runtime.SaveFileDialog(a.ctx, runtime.SaveDialogOptions{DefaultDirectory: dirname, DefaultFilename: "tournament.csv"})
	if err != nil {
		fmt.Println(err)
	}
	println(str)

}

func (a *App) GetParticipants() (ps []model.Participant, err error) {
	err = a.db.Find(&ps).Error
	return
}
func (a *App) SaveParticipant(p model.Participant) error {
	return a.db.Save(&p).Error
}
func (a *App) DeleteParticipat(p model.Participant) {
	a.db.Delete(&p)
}
func (a *App) RemoveParticipantFromTournament(p model.Participant, t model.Tournament) {
	if p.IsTemporary {
		a.db.Delete(&p)
		return
	}
	a.db.Model(&t).Association("Participants").Delete(&p)
}

func (a *App) GetMatches(tID uint) [][]model.Match {
	matches := make([][]model.Match, 0)
	for {
		ms := make([]model.Match, 0)
		if err := a.db.Where("tournament_id = ? AND stage = ?", tID, len(matches)).Find(&ms).Error; err != nil || len(ms) == 0 {
			fmt.Println(ms)
			fmt.Println(err)
			return matches
		}
		slices.SortFunc(ms, func(a, b model.Match) int { return a.Order - b.Order })
		matches = append(matches, ms)
	}
}