package systemconfig

import (
	"math"
	"strings"
)

// 热区悬浮放大倍数：与前端 BANNER_HOTSPOT_DEFAULT_HOVER_SCALE 保持一致。
const defaultBannerHotspotHoverScale = 1.06
const maxBannerHotspotHoverScale = 1.5

func normalizeAnnouncements(items []string) []string {
	normalized := make([]string, 0, len(items))
	for _, item := range items {
		item = strings.TrimSpace(item)
		if item != "" {
			normalized = append(normalized, item)
		}
	}
	if len(normalized) == 0 {
		return defaultHomeAnnouncements()
	}
	return normalized
}

func normalizeHomeBanners(items []HomeBannerItem) []HomeBannerItem {
	normalized := make([]HomeBannerItem, 0, len(items))
	for _, item := range items {
		item.Eyebrow = strings.TrimSpace(item.Eyebrow)
		item.Title = strings.TrimSpace(item.Title)
		item.Badge = strings.TrimSpace(item.Badge)
		item.Pill = strings.TrimSpace(item.Pill)
		item.Tone = strings.TrimSpace(item.Tone)
		// 旧结构只有一张图，两端共用，避免历史配置升级后丢图
		legacyImageURL := strings.TrimSpace(item.ImageURL)
		item.ImageURL = ""
		item.PC = normalizeBannerVisual(item.PC, legacyImageURL)
		item.Mobile = normalizeBannerVisual(item.Mobile, legacyImageURL)
		if item.Title == "" && item.PC.ImageURL == "" && item.Mobile.ImageURL == "" {
			continue
		}
		if item.Tone != "green" && item.Tone != "orange" && item.Tone != "gold" {
			item.Tone = "blue"
		}
		normalized = append(normalized, item)
	}
	if len(normalized) == 0 {
		return defaultHomeBanners()
	}
	return normalized
}

func normalizeBannerVisual(visual HomeBannerVisual, legacyImageURL string) HomeBannerVisual {
	visual.ImageURL = strings.TrimSpace(visual.ImageURL)
	if visual.ImageURL == "" {
		visual.ImageURL = legacyImageURL
	}
	visual.Alt = strings.TrimSpace(visual.Alt)
	visual.Action = normalizeBannerAction(visual.Action)
	hotspots := make([]HomeBannerHotspot, 0, len(visual.Hotspots))
	for _, hotspot := range visual.Hotspots {
		item, ok := normalizeBannerHotspot(hotspot)
		if !ok {
			continue
		}
		hotspots = append(hotspots, item)
	}
	visual.Hotspots = hotspots
	return visual
}

// normalizeBannerHotspot 收敛热区坐标：宽高为 0 的热区无意义直接丢弃，其余保证不越界。
func normalizeBannerHotspot(hotspot HomeBannerHotspot) (HomeBannerHotspot, bool) {
	width := clampBannerPercent(hotspot.Width, 100)
	height := clampBannerPercent(hotspot.Height, 100)
	if width <= 0 || height <= 0 {
		return HomeBannerHotspot{}, false
	}
	hotspot.ID = strings.TrimSpace(hotspot.ID)
	hotspot.Label = strings.TrimSpace(hotspot.Label)
	hotspot.ImageURL = strings.TrimSpace(hotspot.ImageURL)
	hotspot.HoverScale = normalizeHotspotHoverScale(hotspot.HoverScale)
	hotspot.Width = width
	hotspot.Height = height
	hotspot.X = clampBannerPercent(hotspot.X, 100-width)
	hotspot.Y = clampBannerPercent(hotspot.Y, 100-height)
	hotspot.Action = normalizeBannerAction(hotspot.Action)
	return hotspot, true
}

// normalizeHotspotHoverScale 悬浮放大倍数：缺失/非法回落默认值，上限 1.5 防止热区盖住整张图。
func normalizeHotspotHoverScale(value float64) float64 {
	if value <= 0 {
		return defaultBannerHotspotHoverScale
	}
	if value > maxBannerHotspotHoverScale {
		value = maxBannerHotspotHoverScale
	} else if value < 1 {
		value = 1
	}
	return math.Round(value*100) / 100
}

// normalizeBannerAction 目标缺失的跳转会变成「点了没反应」的死热区，统一退化为 none。
func normalizeBannerAction(action HomeBannerAction) HomeBannerAction {
	action.Type = strings.TrimSpace(action.Type)
	action.Target = strings.TrimSpace(action.Target)
	switch action.Type {
	case "route", "link":
		if action.Target == "" {
			return HomeBannerAction{Type: "none"}
		}
	case "preview":
		action.Target = ""
		action.OpenNewTab = false
	case "none":
		action.Target = ""
		action.OpenNewTab = false
	default:
		return HomeBannerAction{Type: "none"}
	}
	return action
}

func clampBannerPercent(value float64, max float64) float64 {
	if value < 0 {
		value = 0
	}
	if value > max {
		value = max
	}
	return math.Round(value*100) / 100
}

func normalizeOrderAgreements(agreements *OrderAgreementsDTO) {
	defaults := DefaultOrderAgreements()
	agreements.VirtualAssetPurchase.Title = strings.TrimSpace(agreements.VirtualAssetPurchase.Title)
	agreements.VirtualAssetPurchase.Content = strings.TrimSpace(agreements.VirtualAssetPurchase.Content)
	agreements.RenterAgreement.Title = strings.TrimSpace(agreements.RenterAgreement.Title)
	agreements.RenterAgreement.Content = strings.TrimSpace(agreements.RenterAgreement.Content)
	if agreements.VirtualAssetPurchase.Title == "" {
		agreements.VirtualAssetPurchase.Title = defaults.VirtualAssetPurchase.Title
	}
	if agreements.VirtualAssetPurchase.Content == "" {
		agreements.VirtualAssetPurchase.Content = defaults.VirtualAssetPurchase.Content
	}
	if agreements.RenterAgreement.Title == "" {
		agreements.RenterAgreement.Title = defaults.RenterAgreement.Title
	}
	if agreements.RenterAgreement.Content == "" {
		agreements.RenterAgreement.Content = defaults.RenterAgreement.Content
	}
}

func normalizeListingPublishAgreements(agreements *ListingPublishAgreementsDTO) {
	defaults := DefaultListingPublishAgreements()
	agreements.VirtualAssetSale.Title = strings.TrimSpace(agreements.VirtualAssetSale.Title)
	agreements.VirtualAssetSale.Content = strings.TrimSpace(agreements.VirtualAssetSale.Content)
	agreements.SellerAgreement.Title = strings.TrimSpace(agreements.SellerAgreement.Title)
	agreements.SellerAgreement.Content = strings.TrimSpace(agreements.SellerAgreement.Content)
	if agreements.VirtualAssetSale.Title == "" {
		agreements.VirtualAssetSale.Title = defaults.VirtualAssetSale.Title
	}
	if agreements.VirtualAssetSale.Content == "" {
		agreements.VirtualAssetSale.Content = defaults.VirtualAssetSale.Content
	}
	if agreements.SellerAgreement.Title == "" {
		agreements.SellerAgreement.Title = defaults.SellerAgreement.Title
	}
	if agreements.SellerAgreement.Content == "" {
		agreements.SellerAgreement.Content = defaults.SellerAgreement.Content
	}
}

func normalizePostRentalNotice(notice *PostRentalNoticeDTO) {
	defaults := DefaultPostRentalNotice()
	notice.Title = strings.TrimSpace(notice.Title)
	notice.Content = strings.TrimSpace(notice.Content)
	if notice.Title == "" {
		notice.Title = defaults.Title
	}
	if notice.Content == "" {
		notice.Content = defaults.Content
	}
}

func normalizePublishOptions(options *PublishOptionsDTO) {
	defaults := DefaultPublishOptions()
	if len(options.ServerOptions) == 0 {
		options.ServerOptions = defaults.ServerOptions
	}
	if len(options.FaceOptions) == 0 {
		options.FaceOptions = defaults.FaceOptions
	}
	if len(options.RankOptions) == 0 {
		options.RankOptions = defaults.RankOptions
	}
	if len(options.InsuranceOptions) == 0 {
		options.InsuranceOptions = defaults.InsuranceOptions
	}
	if len(options.LevelOptions) == 0 {
		options.LevelOptions = defaults.LevelOptions
	}
	if len(options.LoginMethodOptions) == 0 {
		options.LoginMethodOptions = defaults.LoginMethodOptions
	}
	if len(options.RegionOptions) == 0 {
		options.RegionOptions = defaults.RegionOptions
	}
	if len(options.SkinGroups) == 0 {
		options.SkinGroups = defaults.SkinGroups
	}
	if len(options.QuantityItems) == 0 {
		options.QuantityItems = defaults.QuantityItems
	}
	if len(options.ScreenshotSlots) == 0 {
		options.ScreenshotSlots = defaults.ScreenshotSlots
	}
	if len(options.BanRecordOptions) == 0 {
		options.BanRecordOptions = defaults.BanRecordOptions
	}
	if len(options.BanEvidenceOptions) == 0 {
		options.BanEvidenceOptions = defaults.BanEvidenceOptions
	}
	if options.FireLevelMin <= 0 {
		options.FireLevelMin = defaults.FireLevelMin
	}
	if options.PriceConfig.DepositPlaceholder == "" {
		options.PriceConfig.DepositPlaceholder = defaults.PriceConfig.DepositPlaceholder
	}
	if options.PriceConfig.DepositHint == "" {
		options.PriceConfig.DepositHint = defaults.PriceConfig.DepositHint
	}
	if options.PriceConfig.PricePlaceholder == "" {
		options.PriceConfig.PricePlaceholder = defaults.PriceConfig.PricePlaceholder
	}
	if options.PriceConfig.RatioDescription == "" {
		options.PriceConfig.RatioDescription = defaults.PriceConfig.RatioDescription
	}
	if options.DepositRecommend.BaseAmount <= 0 {
		options.DepositRecommend.BaseAmount = defaults.DepositRecommend.BaseAmount
	}
	if len(options.DepositRecommend.SkinGroupRules) == 0 {
		options.DepositRecommend.SkinGroupRules = defaults.DepositRecommend.SkinGroupRules
	}
	if len(options.RatioConfig.InsuranceBaseRatios) == 0 {
		options.RatioConfig.InsuranceBaseRatios = defaults.RatioConfig.InsuranceBaseRatios
	}
	if len(options.RatioConfig.ConfigItems) == 0 {
		options.RatioConfig.ConfigItems = defaults.RatioConfig.ConfigItems
	}
	if len(options.RatioConfig.CoinCorrections) == 0 {
		options.RatioConfig.CoinCorrections = defaults.RatioConfig.CoinCorrections
	}
}

func normalizeSalePriceConfig(config *PublishSalePriceConfig) {
	defaults := DefaultSalePriceConfig()
	if len(config.FixedMarkupRules) == 0 {
		config.FixedMarkupRules = defaults.FixedMarkupRules
	}
	if len(config.RatioAdjustmentRules) == 0 {
		config.RatioAdjustmentRules = defaults.RatioAdjustmentRules
	}
}