package handlers

import (
	"context"
	"net/http"
	"time"

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

func NewSeason(
	s *hws.Server,
	conn *bun.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "GET" {
			renderSafely(page.NewSeason(), s, r, w)
			return
		}
	})
}

func NewSeasonSubmit(
	s *hws.Server,
	conn *bun.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
	})
}

func IsSeasonNameUnique(
	s *hws.Server,
	conn *bun.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		err := r.ParseForm()
		if err != nil {
			w.WriteHeader(http.StatusBadRequest)
			return
		}
		ctx, cancel := context.WithTimeout(r.Context(), 15*time.Second)
		defer cancel()
		tx, err := conn.BeginTx(ctx, nil)
		if err != nil {
			err = notifyInternalServiceError(s, r, "Database error", errors.Wrap(err, "conn.BeginTx"))
			if err != nil {
				throwInternalServiceError(s, w, r, "Error notifying client", err)
			}
			return
		}
		name := r.FormValue("name")
		unique, err := db.IsSeasonNameUnique(ctx, tx, name)
		if err != nil {
			err = notifyInternalServiceError(s, r, "Database error", errors.Wrap(err, "db.IsSeasonNameUnique"))
			if err != nil {
				throwInternalServiceError(s, w, r, "Error notifying client", err)
			}
			return
		}
		if !unique {
			w.WriteHeader(http.StatusConflict)
			return
		}
	})
}

func IsSeasonShortNameUnique(
	s *hws.Server,
	conn *bun.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		err := r.ParseForm()
		if err != nil {
			w.WriteHeader(http.StatusBadRequest)
			return
		}
		ctx, cancel := context.WithTimeout(r.Context(), 15*time.Second)
		defer cancel()
		tx, err := conn.BeginTx(ctx, nil)
		if err != nil {
			err = notifyInternalServiceError(s, r, "Database error", errors.Wrap(err, "conn.BeginTx"))
			if err != nil {
				throwInternalServiceError(s, w, r, "Error notifying client", err)
			}
			return
		}
		shortname := r.FormValue("short_name")
		unique, err := db.IsSeasonShortNameUnique(ctx, tx, shortname)
		if err != nil {
			err = notifyInternalServiceError(s, r, "Database error", errors.Wrap(err, "db.IsSeasonShortNameUnique"))
			if err != nil {
				throwInternalServiceError(s, w, r, "Error notifying client", err)
			}
			return
		}
		if !unique {
			w.WriteHeader(http.StatusConflict)
			return
		}
	})
}