package handlers

import (
	"context"
	"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"
)

// SeasonLeagueStatsPage renders the stats tab of a season league page
func SeasonLeagueStatsPage(
	s *hws.Server,
	conn *db.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		seasonStr := r.PathValue("season_short_name")
		leagueStr := r.PathValue("league_short_name")

		var sl *db.SeasonLeague
		var topGoals []*db.LeagueTopGoalScorer
		var topAssists []*db.LeagueTopAssister
		var topSaves []*db.LeagueTopSaver
		var allStats []*db.LeaguePlayerStats

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

			topGoals, err = db.GetTopGoalScorers(ctx, tx, sl.SeasonID, sl.LeagueID)
			if err != nil {
				return false, errors.Wrap(err, "db.GetTopGoalScorers")
			}

			topAssists, err = db.GetTopAssisters(ctx, tx, sl.SeasonID, sl.LeagueID)
			if err != nil {
				return false, errors.Wrap(err, "db.GetTopAssisters")
			}

			topSaves, err = db.GetTopSavers(ctx, tx, sl.SeasonID, sl.LeagueID)
			if err != nil {
				return false, errors.Wrap(err, "db.GetTopSavers")
			}

			allStats, err = db.GetAllLeaguePlayerStats(ctx, tx, sl.SeasonID, sl.LeagueID)
			if err != nil {
				return false, errors.Wrap(err, "db.GetAllLeaguePlayerStats")
			}

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

		if r.Method == "GET" {
			renderSafely(seasonsview.SeasonLeagueStatsPage(sl.Season, sl.League, topGoals, topAssists, topSaves, allStats), s, r, w)
		} else {
			renderSafely(seasonsview.SeasonLeagueStats(sl.Season, sl.League, topGoals, topAssists, topSaves, allStats), s, r, w)
		}
	})
}