package handlers

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

	"git.haelnorr.com/h/golib/hws"
	"github.com/pkg/errors"
	"github.com/uptrace/bun"

	"git.haelnorr.com/h/oslstats/internal/db"
	"git.haelnorr.com/h/oslstats/internal/notify"
	"git.haelnorr.com/h/oslstats/internal/respond"
	"git.haelnorr.com/h/oslstats/internal/validation"
	teamsview "git.haelnorr.com/h/oslstats/internal/view/teamsview"
)

func NewTeamPage(
	s *hws.Server,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		renderSafely(teamsview.NewPage(), s, r, w)
	})
}

func NewTeamSubmit(
	s *hws.Server,
	conn *db.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		getter, ok := validation.ParseFormOrNotify(s, w, r)
		if !ok {
			return
		}
		name := getter.String("name").
			TrimSpace().Required().
			MaxLength(25).MinLength(3).Value
		shortName := getter.String("short_name").
			TrimSpace().Required().ToUpper().
			MaxLength(3).MinLength(3).Value
		altShortName := getter.String("alt_short_name").
			TrimSpace().Required().ToUpper().
			MaxLength(3).MinLength(3).Value
		color := getter.String("color").
			TrimSpace().MaxLength(7).Value
		if !getter.ValidateAndNotify(s, w, r) {
			return
		}

		// Check that short names are different
		if shortName == altShortName {
			notify.Warn(s, w, r, "Invalid Short Names", "Short name and alternative short name must be different.", nil)
			return
		}

		nameUnique := false
		shortNameComboUnique := false
		if ok := conn.WithNotifyTx(s, w, r, func(ctx context.Context, tx bun.Tx) (bool, error) {
			var err error
			nameUnique, err = db.IsUnique(ctx, tx, (*db.Team)(nil), "name", name)
			if err != nil {
				return false, errors.Wrap(err, "db.IsTeamNameUnique")
			}

			shortNameComboUnique, err = db.TeamShortNamesUnique(ctx, tx, shortName, altShortName)
			if err != nil {
				return false, errors.Wrap(err, "db.TeamShortNamesUnique")
			}

			if !nameUnique || !shortNameComboUnique {
				return true, nil
			}
			_, err = db.NewTeam(ctx, tx, name, shortName, altShortName, color, db.NewAudit(r, nil))
			if err != nil {
				return false, errors.Wrap(err, "db.NewTeam")
			}
			return true, nil
		}); !ok {
			return
		}

		if !nameUnique {
			notify.Warn(s, w, r, "Duplicate Name", "This team name is already taken.", nil)
			return
		}

		if !shortNameComboUnique {
			notify.Warn(s, w, r, "Duplicate Short Names", "This combination of short names is already taken.", nil)
			return
		}
		respond.HXRedirect(w, "/teams")
		notify.SuccessWithDelay(s, w, r, "Team Created", fmt.Sprintf("Successfully created team: %s", name), nil)
	})
}