package dbrepo

import (
	"context"
	"errors"
	"go-udemy-web-1/internal/models"
	"go-udemy-web-1/internal/repository/sqlc"
	"time"

	"github.com/jackc/pgx/v5/pgtype"
	"golang.org/x/crypto/bcrypt"
)

func (m *pgcDBRepo) AllUsers() bool {
	return true
}

// InsertReservation inserts a reservation into the database
func (m *pgcDBRepo) InsertReservation(res models.Reservation) (int, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var newId int32
	newId, err := m.Q.InsertReservation(ctx, sqlc.InsertReservationParams{
		FirstName: res.FirstName,
		LastName:  res.LastName,
		Email:     res.Email,
		Phone:     res.Phone,
		StartDate: pgtype.Date{Time: res.StartDate, Valid: true},
		EndDate:   pgtype.Date{Time: res.EndDate, Valid: true},
		RoomID:    int32(res.RoomID),
		CreatedAt: pgtype.Timestamp{Time: time.Now(), Valid: true},
		UpdatedAt: pgtype.Timestamp{Time: time.Now(), Valid: true},
	})
	if err != nil {
		m.App.ErrorLog.Println(err)
		return 0, err
	}

	return int(newId), nil
}

// InsertRoomRestriction inserts a room restriction into the database
func (m *pgcDBRepo) InsertRoomRestriction(r models.RoomRestriction) error {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.Q.InsertRoomRestriction(ctx, sqlc.InsertRoomRestrictionParams{
		StartDate:     pgtype.Date{Time: r.StartDate, Valid: true},
		EndDate:       pgtype.Date{Time: r.EndDate, Valid: true},
		RoomID:        int32(r.RoomID),
		ReservationID: pgtype.Int4{Int32: int32(r.ReservationID), Valid: true},
		RestrictionID: int32(r.RestrictionID),
		CreatedAt:     pgtype.Timestamp{Time: time.Now(), Valid: true},
		UpdatedAt:     pgtype.Timestamp{Time: time.Now(), Valid: true},
	})
	if err != nil {
		m.App.ErrorLog.Println(err)
		return err
	}
	return nil
}

// SearchAvailabilityByDatesByRoomID returns true if availability exists for roomID, and false if no availability
func (m *pgcDBRepo) SearchAvailabilityByDatesByRoomID(start, end time.Time, roomID int) (bool, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	numRows, err := m.Q.SearchAvailabilityByDatesByRoomID(ctx, sqlc.SearchAvailabilityByDatesByRoomIDParams{
		RoomID:    int32(roomID),
		EndDate:   pgtype.Date{Time: start, Valid: true},
		StartDate: pgtype.Date{Time: end, Valid: false},
	})
	if err != nil {
		return false, err
	}

	if numRows == 0 {
		return false, nil
	}

	return true, nil
}

// SearchAvailabilityForAllRooms returns a slice of rooms, if any, for given date range
func (m *pgcDBRepo) SearchAvailabilityForAllRooms(start, end time.Time) ([]models.Room, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var rooms []models.Room

	rows, err := m.Q.SearchAvailabilityForAllRooms(ctx, sqlc.SearchAvailabilityForAllRoomsParams{
		EndDate:   pgtype.Date{Time: start, Valid: true},
		StartDate: pgtype.Date{Time: start, Valid: true},
	})
	if err != nil {
		return nil, err
	}
	for _, row := range rows {
		room := models.Room{
			RoomName: row.RoomName,
			ID:       int(row.ID),
		}
		rooms = append(rooms, room)
	}

	return rooms, nil
}

// GetRoomById gets a room by id
func (m *pgcDBRepo) GetRoomById(id int) (models.Room, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var room models.Room

	row, err := m.Q.GetRoomById(ctx, int32(id))
	if err != nil {
		return room, err
	}
	room = models.Room{
		ID:       int(row.ID),
		RoomName: row.RoomName,
	}

	return room, nil
}

// GetUserByID gets a user by id
func (m *pgcDBRepo) GetUserByID(id int) (models.User, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var u models.User

	row, err := m.Q.GetUserByID(ctx, int32(id))
	if err != nil {
		return u, err
	}

	u = models.User{
		ID:          int(row.ID),
		FirstName:   row.FirstName,
		LastName:    row.LastName,
		Email:       row.Email,
		Password:    row.Password,
		AccessLevel: int(row.AccessLevel),
	}

	return u, nil
}

// UpdateUser updates a user in the database
func (m *pgcDBRepo) UpdateUser(u models.User) error {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.Q.UpdateUser(ctx, sqlc.UpdateUserParams{
		FirstName:   u.FirstName,
		LastName:    u.LastName,
		Email:       u.Email,
		AccessLevel: int32(u.AccessLevel),
		UpdatedAt:   pgtype.Timestamp{Time: time.Now(), Valid: true},
	})
	if err != nil {
		return err
	}
	return nil
}

// Authenticate authenticates a user
func (m *pgcDBRepo) Authenticate(email, testPassword string) (int, string, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var id int
	var hashedPassword string

	row, err := m.Q.GetUserCred(ctx, email)
	if err != nil {
		return id, "", err
	}
	id = int(row.ID)
	hashedPassword = row.Password

	err = bcrypt.CompareHashAndPassword([]byte(hashedPassword), []byte(testPassword))
	if err == bcrypt.ErrMismatchedHashAndPassword {
		return 0, "", errors.New("incorrect password")
	} else if err != nil {
		return 0, "", err
	}

	return id, hashedPassword, nil
}

// AllReservations returns a slice of all reservations
func (m *pgcDBRepo) AllReservations() ([]models.Reservation, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var reservations []models.Reservation

	rows, err := m.Q.AllReservations(ctx)
	if err != nil {
		return nil, err
	}

	for _, row := range rows {
		r := models.Reservation{
			StartDate: row.StartDate.Time,
			EndDate:   row.EndDate.Time,
			FirstName: row.FirstName,
			LastName:  row.LastName,
			Email:     row.Email,
			Phone:     row.Phone,
			Room:      models.Room{ID: int(row.RoomID), RoomName: row.RoomName.String},
			ID:        int(row.ID),
			RoomID:    int(row.RoomID),
			Processed: int(row.Processed),
		}

		reservations = append(reservations, r)
	}

	return reservations, nil
}

// AllNewReservations returns a slice of all new reservations
func (m *pgcDBRepo) AllNewReservations() ([]models.Reservation, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var reservations []models.Reservation

	rows, err := m.Q.AllNewReservations(ctx)
	if err != nil {
		return nil, err
	}

	for _, row := range rows {
		r := models.Reservation{
			StartDate: row.StartDate.Time,
			EndDate:   row.EndDate.Time,
			FirstName: row.FirstName,
			LastName:  row.LastName,
			Email:     row.Email,
			Phone:     row.Phone,
			Room:      models.Room{ID: int(row.RoomID), RoomName: row.RoomName.String},
			ID:        int(row.ID),
			RoomID:    int(row.RoomID),
			Processed: int(row.Processed),
		}

		reservations = append(reservations, r)
	}

	return reservations, nil
}

// GetReservationByID returns one reservation by ID
func (m *pgcDBRepo) GetReservationByID(id int) (models.Reservation, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var res models.Reservation

	row, err := m.Q.GetReservationByID(ctx, int32(id))
	if err != nil {
		return res, err
	}

	res = models.Reservation{
		StartDate: row.StartDate.Time,
		EndDate:   row.EndDate.Time,
		FirstName: row.FirstName,
		LastName:  row.LastName,
		Email:     row.Email,
		Phone:     row.Phone,
		Room:      models.Room{ID: int(row.RoomID), RoomName: row.RoomName.String},
		ID:        int(row.ID),
		RoomID:    int(row.RoomID),
		Processed: int(row.Processed),
	}

	return res, nil
}

// UpdateReservation updates a user in the database
func (m *pgcDBRepo) UpdateReservation(r models.Reservation) error {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.Q.UpdateReservation(ctx, sqlc.UpdateReservationParams{
		ID:        int32(r.ID),
		FirstName: r.FirstName,
		LastName:  r.LastName,
		Email:     r.Email,
		Phone:     r.Phone,
		UpdatedAt: pgtype.Timestamp{Time: time.Now(), Valid: true},
	})
	if err != nil {
		return err
	}

	return nil
}

func (m *pgcDBRepo) DeleteReservation(id int) error {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.Q.DeleteReservation(ctx, int32(id))
	if err != nil {
		return err
	}

	return nil
}

// UpdateProcessedForReservation set processed for a reservation
func (m *pgcDBRepo) UpdateProcessedForReservation(id, processed int) error {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.Q.UpdateProcessedForReservation(ctx, sqlc.UpdateProcessedForReservationParams{
		Processed: int32(processed),
		ID:        int32(id),
	})
	if err != nil {
		return err
	}

	return nil
}

func (m *pgcDBRepo) AllRooms() ([]models.Room, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var rooms []models.Room

	rows, err := m.Q.AllRooms(ctx)
	if err != nil {
		return nil, err
	}
	for _, row := range rows {
		room := models.Room{
			RoomName: row.RoomName,
			ID:       int(row.ID),
		}
		rooms = append(rooms, room)
	}
	return rooms, nil
}

// GetRestrictionsForRoomByDate returns restrictions for a room by date range
func (m *pgcDBRepo) GetRestrictionsForRoomByDate(roomId int, start, end time.Time) ([]models.RoomRestriction, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var restrictions []models.RoomRestriction

	rows, err := m.Q.GetRestrictionsForRoomByDate(ctx, sqlc.GetRestrictionsForRoomByDateParams{
		EndDate:   pgtype.Date{Time: end, Valid: true},
		StartDate: pgtype.Date{Time: start, Valid: true},
		RoomID:    int32(roomId),
	})
	if err != nil {
		return restrictions, err
	}
	for _, row := range rows {
		r := models.RoomRestriction{
			StartDate:     row.StartDate.Time,
			EndDate:       row.EndDate.Time,
			ID:            int(row.ID),
			RoomID:        int(row.RoomID),
			ReservationID: int(row.ReservationID),
			RestrictionID: int(row.RestrictionID),
		}
		restrictions = append(restrictions, r)
	}

	return restrictions, nil
}

// InsertBlockForRoom inserts a room restriction
func (m *pgcDBRepo) InsertBlockForRoom(id int, startDate time.Time) error {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.Q.InsertBlockForRoom(ctx, sqlc.InsertBlockForRoomParams{
		StartDate:     pgtype.Date{Time: startDate, Valid: true},
		EndDate:       pgtype.Date{Time: startDate.AddDate(0, 0, 1)},
		RoomID:        int32(id),
		RestrictionID: 2,
		CreatedAt:     pgtype.Timestamp{Time: time.Now(), Valid: true},
		UpdatedAt:     pgtype.Timestamp{Time: time.Now(), Valid: true},
	})
	if err != nil {
		return err
	}
	return nil
}

// DeleteBlockByID deletes a block by ID
func (m *pgcDBRepo) DeleteBlockByID(id int) error {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.Q.DeleteBlockByID(ctx, int32(id))
	if err != nil {
		return err
	}

	return nil
}