package listing

import (
	"context"
	"strings"

	"hfb_sys/backend/internal/model"
)

// ReceiveCostDeltaBySiteCode 读取分站收号压价点数（新口径，收号比例 = R + 点数）。
func (r *Repository) ReceiveCostDeltaBySiteCode(ctx context.Context, siteCode string) float64 {
	siteCode = strings.TrimSpace(siteCode)
	if r == nil || r.db == nil || siteCode == "" {
		return 0
	}
	var delta float64
	_ = r.db.WithContext(ctx).Model(&model.DistributionSite{}).
		Select("COALESCE(receive_cost_delta, 0)").
		Where("site_code = ? AND status = 'active'", siteCode).
		Limit(1).
		Scan(&delta)
	return NormalizeSiteReceiveCostDelta(delta)
}

// resolveSiteReceiveCostDelta 按站点编码或商品归属站点解析压价点数。
// 返回 onDistribution 表示当前上下文是否为分站（false 时压价不生效）。
func (r *Repository) resolveSiteReceiveCostDelta(ctx context.Context, listingID uint64, siteCode string) (float64, bool) {
	if code := strings.TrimSpace(siteCode); code != "" {
		return r.ReceiveCostDeltaBySiteCode(ctx, code), true
	}
	if r == nil || r.db == nil || listingID == 0 {
		return 0, false
	}
	var siteID *uint64
	if err := r.db.WithContext(ctx).Model(&model.RentalListing{}).
		Select("distribution_site_id").
		Where("id = ?", listingID).
		Limit(1).
		Scan(&siteID).Error; err != nil || siteID == nil || *siteID == 0 {
		return 0, false
	}
	var delta float64
	_ = r.db.WithContext(ctx).Model(&model.DistributionSite{}).
		Select("COALESCE(receive_cost_delta, 0)").
		Where("id = ? AND status = 'active'", *siteID).
		Limit(1).
		Scan(&delta)
	return NormalizeSiteReceiveCostDelta(delta), true
}

// ReceiveRatioDeltaBySiteCode 旧口径（加价抢货）读取，保留只读兼容。
func (r *Repository) ReceiveRatioDeltaBySiteCode(ctx context.Context, siteCode string) float64 {
	siteCode = strings.TrimSpace(siteCode)
	if r == nil || r.db == nil || siteCode == "" {
		return 0
	}
	var delta float64
	_ = r.db.WithContext(ctx).Model(&model.DistributionSite{}).
		Select("COALESCE(receive_ratio_delta, 0)").
		Where("site_code = ? AND status = 'active'", siteCode).
		Limit(1).
		Scan(&delta)
	return NormalizeSiteReceiveRatioDelta(delta)
}

// ResolveReceiveRatioDelta 旧口径解析入口，保留供旧快照读侧使用。
func (r *Repository) ResolveReceiveRatioDelta(ctx context.Context, listingID uint64, siteCode string) (float64, bool) {
	if code := strings.TrimSpace(siteCode); code != "" {
		return r.ReceiveRatioDeltaBySiteCode(ctx, code), true
	}
	if r == nil || r.db == nil || listingID == 0 {
		return 0, false
	}
	var siteID *uint64
	if err := r.db.WithContext(ctx).Model(&model.RentalListing{}).
		Select("distribution_site_id").
		Where("id = ?", listingID).
		Limit(1).
		Scan(&siteID).Error; err != nil || siteID == nil || *siteID == 0 {
		return 0, false
	}
	var delta float64
	_ = r.db.WithContext(ctx).Model(&model.DistributionSite{}).
		Select("COALESCE(receive_ratio_delta, 0)").
		Where("id = ? AND status = 'active'", *siteID).
		Limit(1).
		Scan(&delta)
	return NormalizeSiteReceiveRatioDelta(delta), true
}