package handlers

import (
	"context"
	"fmt"
	"net/http"

	"git.haelnorr.com/h/golib/hws"
	"git.haelnorr.com/h/oslstats/internal/db"
	"git.haelnorr.com/h/oslstats/internal/throw"
	seasonsview "git.haelnorr.com/h/oslstats/internal/view/seasonsview"
	"github.com/pkg/errors"
	"github.com/uptrace/bun"
)

func SeasonPage(
	s *hws.Server,
	conn *db.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		seasonStr := r.PathValue("season_short_name")
		var season *db.Season
		var leaguesWithTeams []db.LeagueWithTeams

		if ok := conn.WithReadTx(s, w, r, func(ctx context.Context, tx bun.Tx) (bool, error) {
			var err error
			season, err = db.GetSeason(ctx, tx, seasonStr)
			if err != nil {
				if db.IsBadRequest(err) {
					throw.NotFound(s, w, r, r.URL.Path)
					return false, nil
				}
				return false, errors.Wrap(err, "db.GetSeason")
			}

			if season.Type != db.SeasonTypeDraft.String() {
				leaguesWithTeams, err = season.MapTeamsToLeagues(ctx, tx)
				if err != nil {
					return false, errors.Wrap(err, "season.MapTeamsToLeagues")
				}
			}

			return true, nil
		}); !ok {
			return
		}

		if season.Type == db.SeasonTypeDraft.String() {
			// Redirect draft seasons to their default tab
			defaultTab := season.GetDefaultTab()
			redirectURL := fmt.Sprintf("/seasons/%s/%s", seasonStr, defaultTab)
			http.Redirect(w, r, redirectURL, http.StatusSeeOther)
			return
		}

		renderSafely(seasonsview.DetailPage(season, leaguesWithTeams), s, r, w)
	})
}