package promo_usage

import (
	"context"
	"errors"
	"fmt"

	"github.com/perfect-panel/server/pkg/cache"
	"github.com/redis/go-redis/v9"
	"gorm.io/gorm"
)

var _ Model = (*customPromoUsageModel)(nil)

var cachePromoUsageIdPrefix = "cache:promo_usage:id:"

type (
	Model interface {
		promoUsageModel
		customPromoUsageLogicModel
	}

	promoUsageModel interface {
		Insert(ctx context.Context, data *PromoUsage, tx ...*gorm.DB) error
		FindOne(ctx context.Context, id int64) (*PromoUsage, error)
		Update(ctx context.Context, data *PromoUsage, tx ...*gorm.DB) error
		Delete(ctx context.Context, id int64, tx ...*gorm.DB) error
		Transaction(ctx context.Context, fn func(db *gorm.DB) error) error
	}

	customPromoUsageModel struct {
		*defaultPromoUsageModel
	}
	defaultPromoUsageModel struct {
		cache.CachedConn
		table string
	}
)

func newPromoUsageModel(db *gorm.DB, c *redis.Client) *defaultPromoUsageModel {
	return &defaultPromoUsageModel{
		CachedConn: cache.NewConn(db, c),
		table:      "`promo_usage`",
	}
}

func (m *defaultPromoUsageModel) getCacheKeys(data *PromoUsage) []string {
	if data == nil {
		return []string{}
	}
	return []string{fmt.Sprintf("%s%v", cachePromoUsageIdPrefix, data.Id)}
}

func (m *defaultPromoUsageModel) Insert(ctx context.Context, data *PromoUsage, tx ...*gorm.DB) error {
	return m.ExecCtx(ctx, func(conn *gorm.DB) error {
		if len(tx) > 0 {
			conn = tx[0]
		}
		return conn.Create(data).Error
	}, m.getCacheKeys(data)...)
}

func (m *defaultPromoUsageModel) FindOne(ctx context.Context, id int64) (*PromoUsage, error) {
	key := fmt.Sprintf("%s%v", cachePromoUsageIdPrefix, id)
	var resp PromoUsage
	err := m.QueryCtx(ctx, &resp, key, func(conn *gorm.DB, v interface{}) error {
		return conn.Model(&PromoUsage{}).Where("`id` = ?", id).First(v).Error
	})
	if err != nil {
		return nil, err
	}
	return &resp, nil
}

func (m *defaultPromoUsageModel) Update(ctx context.Context, data *PromoUsage, tx ...*gorm.DB) error {
	old, err := m.FindOne(ctx, data.Id)
	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
		return err
	}
	return m.ExecCtx(ctx, func(conn *gorm.DB) error {
		if len(tx) > 0 {
			conn = tx[0]
		}
		return conn.Save(data).Error
	}, m.getCacheKeys(old)...)
}

func (m *defaultPromoUsageModel) Delete(ctx context.Context, id int64, tx ...*gorm.DB) error {
	data, err := m.FindOne(ctx, id)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return nil
		}
		return err
	}
	return m.ExecCtx(ctx, func(conn *gorm.DB) error {
		if len(tx) > 0 {
			conn = tx[0]
		}
		return conn.Delete(&PromoUsage{}, id).Error
	}, m.getCacheKeys(data)...)
}

func (m *defaultPromoUsageModel) Transaction(ctx context.Context, fn func(db *gorm.DB) error) error {
	return m.TransactCtx(ctx, fn)
}