package orders

import (
	"context"
	"furtuna-be/internal/common/logger"
	"furtuna-be/internal/entity"
	"strings"

	"go.uber.org/zap"
	"gorm.io/gorm"
)

type OrderRepository struct {
	db *gorm.DB
}

func NewOrderRepository(db *gorm.DB) *OrderRepository {
	return &OrderRepository{
		db: db,
	}
}

func (r *OrderRepository) Create(ctx context.Context, order *entity.Order) (*entity.Order, error) {
	err := r.db.WithContext(ctx).Create(order).Error
	if err != nil {
		logger.ContextLogger(ctx).Error("error when creating order", zap.Error(err))
		return nil, err
	}
	return r.FindByID(ctx, order.ID)
}

func (r *OrderRepository) UpdateStatus(ctx context.Context, orderID int64, status string) (*entity.Order, error) {
	order := new(entity.Order)
	if err := r.db.WithContext(ctx).First(order, orderID).Error; err != nil {
		logger.ContextLogger(ctx).Error("error when finding order", zap.Error(err))
		return nil, err
	}
	order.Status = status
	if err := r.db.WithContext(ctx).Save(order).Error; err != nil {
		logger.ContextLogger(ctx).Error("error when updating order status", zap.Error(err))
		return nil, err
	}
	return order, nil
}

func (r *OrderRepository) FindByID(ctx context.Context, id int64) (*entity.Order, error) {
	var order entity.Order

	err := r.db.WithContext(ctx).Preload("OrderItems", func(db *gorm.DB) *gorm.DB {
		return db.Preload("Product")
	}).First(&order, id).Error

	if err != nil {
		logger.ContextLogger(ctx).Error("error when finding order by ID", zap.Error(err))
		return nil, err
	}

	return &order, nil
}

func (r *OrderRepository) SetOrderStatus(ctx context.Context, db *gorm.DB, orderID int64, status string) error {
	var order entity.Order
	if err := db.WithContext(ctx).Preload("OrderItems").First(&order, orderID).Error; err != nil {
		logger.ContextLogger(ctx).Error("error when finding order by ID", zap.Error(err))
		return err
	}

	order.Status = status

	if err := db.WithContext(ctx).Save(&order).Error; err != nil {
		logger.ContextLogger(ctx).Error("error when updating order status", zap.Error(err))
		return err
	}

	return nil
}

func (r *OrderRepository) Update(ctx context.Context, order *entity.Order) (*entity.Order, error) {
	if err := r.db.WithContext(ctx).Save(order).Error; err != nil {
		logger.ContextLogger(ctx).Error("error when updating order", zap.Error(err))
		return nil, err
	}
	return order, nil
}

func (b *OrderRepository) GetAllHystoryOrders(ctx context.Context, req entity.HistoryOrderSearch) (entity.HistoryOrderList, int, error) {
	var orders []*entity.HistoryOrderDB
	var total int64

	query := b.db.Table("orders").
		Select("orders.id as id, users.name as employee, sites.name as site, orders.created_at as timestamp, orders.created_at as booking_time, STRING_AGG(ticket_summary.name || ' x' || ticket_summary.total_qty, ', ') AS tickets, orders.payment_type as payment_type, orders.status as status, orders.amount as amount").
		Joins("left join (SELECT items.order_id, products.name, SUM(items.qty) AS total_qty FROM order_items items LEFT JOIN products ON items.item_id = products.id GROUP BY items.order_id, products.name) AS ticket_summary ON orders.id = ticket_summary.order_id").
		Joins("left join users on orders.created_by = users.id").
		Joins("left join partners on orders.partner_id = partners.id").
		Joins("left join sites on partners.id = sites.partner_id")

	if !req.IsAdmin {
		query = query.Where("orders.partner_id = ?", req.PartnerID)
	}

	query = query.Group("orders.id, users.name, sites.name, orders.created_at, orders.payment_type, orders.status")

	if err := query.Count(&total).Error; err != nil {
		logger.ContextLogger(ctx).Error("error when count history orders", zap.Error(err))
		return nil, 0, err
	}

	if req.Offset > 0 {
		query = query.Offset(req.Offset)
	}

	if req.Limit > 0 {
		query = query.Limit(req.Limit)
	}

	if err := query.Scan(&orders).Error; err != nil {
		logger.ContextLogger(ctx).Error("error when get all history orders", zap.Error(err))
		return nil, 0, err
	}

	for i, order := range orders {
		if order.RawTickets != "" {
			orders[i].Tickets = strings.Split(order.RawTickets, ", ")
		}
	}

	return orders, int(total), nil
}