package templates

import (
	"fmt"

	"veola/internal/apify"
)

type PreviewData struct {
	CSRFToken    string
	Form         FormValues
	Results      []apify.UnifiedResult
	BestIndex    int
	MinPrice     float64
	MaxPrice     float64
	StoreCount   int
	Error        string
	Empty        bool
	Cached       bool
	Currency     string
}

// FormValues mirrors the Step 1 form so the confirm POST has every field.
type FormValues struct {
	Name                string
	SearchQuery         string
	URL                 string
	Category            string
	TargetPrice         string
	MinPrice            string
	ExcludeKeywords     string
	NtfyTopic           string
	NtfyPriority        string
	PollIntervalMinutes string
	IncludeOutOfStock   bool
	Marketplaces        []string
	ListingType         string
	ActorActive         string
	ActorSold           string
	ActorPriceCompare   string
	UsePriceComparison  bool
}

templ ItemPreview(d PreviewData) {
	if d.Error != "" {
		<div class="v-flash-error">
			<div class="font-semibold mb-1">Could not run preview</div>
			<div>{ d.Error }</div>
			<button class="v-btn-ghost mt-2" hx-get="/items/new" hx-target="#preview-target" hx-swap="innerHTML">Back</button>
		</div>
	} else if d.Empty {
		<div class="v-flash">
			<div class="font-semibold mb-1">No results found</div>
			<div>Try a broader search query or a different marketplace.</div>
		</div>
	} else {
		<div class="v-card p-5">
			<div class="flex items-center justify-between mb-4">
				<h2 class="font-semibold">
					{ fmt.Sprintf("Found %d results for '%s'", len(d.Results), d.Form.SearchQuery) }
					if d.Cached {
						<span class="v-pill v-pill-paused ml-2">cached</span>
					}
				</h2>
			</div>
			@previewBest(d)
			if len(d.Results) > 1 {
				<div class="mt-5">
					<div class="v-muted text-xs uppercase tracking-wide mb-2">Other results</div>
					<ul class="space-y-2">
						for i, r := range d.Results {
							if i != d.BestIndex && i < d.BestIndex+6 {
								<li class="flex items-center gap-3">
									if r.ImageURL != "" {
										<img src={ r.ImageURL } alt="" class="w-10 h-10 object-cover rounded"/>
									}
									<div class="flex-1 truncate">
										<a href={ templ.SafeURL(r.URL) } target="_blank" rel="noopener" class="text-sm">{ r.Title }</a>
										<div class="v-muted text-xs">{ r.Store }</div>
									</div>
									<div class="font-mono">{ fmtNumber(r.Price, r.Currency) }</div>
								</li>
							}
						}
					</ul>
					if len(d.Results) > 6 {
						<div class="v-muted text-xs mt-2">{ fmt.Sprintf("and %d more", len(d.Results)-6) }</div>
					}
				</div>
			}
			<div class="v-divider my-4"></div>
			<div class="text-sm v-muted">
				{ fmt.Sprintf("Prices range from %s to %s across %d stores", fmtNumber(d.MinPrice, d.Currency), fmtNumber(d.MaxPrice, d.Currency), d.StoreCount) }
			</div>
		</div>
	}
	@confirmForm(d)
}

templ previewBest(d PreviewData) {
	if d.BestIndex >= 0 && d.BestIndex < len(d.Results) {
		<div class="grid md:grid-cols-[160px_1fr] gap-4 items-start">
			if d.Results[d.BestIndex].ImageURL != "" {
				<img src={ d.Results[d.BestIndex].ImageURL } alt="" class="rounded w-40 h-40 object-cover"/>
			} else {
				<div class="rounded w-40 h-40 bg-black/30"></div>
			}
			<div>
				<div class="text-xs v-price-deal uppercase tracking-wide mb-1">Best Price</div>
				<div class="font-mono text-3xl mb-2">{ fmtNumber(d.Results[d.BestIndex].Price, d.Currency) }</div>
				<a class="font-semibold" href={ templ.SafeURL(d.Results[d.BestIndex].URL) } target="_blank" rel="noopener">{ d.Results[d.BestIndex].Title }</a>
				<div class="v-muted text-sm mt-1">{ d.Results[d.BestIndex].Store }</div>
				if d.Results[d.BestIndex].MatchedQuery != "" {
					<div class="v-muted text-xs mt-1">via "{ d.Results[d.BestIndex].MatchedQuery }"</div>
				}
			</div>
		</div>
	}
}

templ confirmForm(d PreviewData) {
	<form method="post" action="/items" class="mt-5 flex items-center gap-3">
		<input type="hidden" name="csrf_token" value={ d.CSRFToken }/>
		@hidden("name", d.Form.Name)
		@hidden("search_query", d.Form.SearchQuery)
		@hidden("url", d.Form.URL)
		@hidden("category", d.Form.Category)
		@hidden("target_price", d.Form.TargetPrice)
		@hidden("min_price", d.Form.MinPrice)
		@hidden("exclude_keywords", d.Form.ExcludeKeywords)
		@hidden("ntfy_topic", d.Form.NtfyTopic)
		@hidden("ntfy_priority", d.Form.NtfyPriority)
		@hidden("poll_interval_minutes", d.Form.PollIntervalMinutes)
		@hiddenBool("include_out_of_stock", d.Form.IncludeOutOfStock)
		for _, m := range d.Form.Marketplaces {
			@hidden("marketplace", m)
		}
		@hidden("listing_type", d.Form.ListingType)
		@hidden("actor_active", d.Form.ActorActive)
		@hidden("actor_sold", d.Form.ActorSold)
		@hidden("actor_price_compare", d.Form.ActorPriceCompare)
		@hiddenBool("use_price_comparison", d.Form.UsePriceComparison)
		<button type="submit" class="v-btn" disabled?={ d.Empty || d.Error != "" }>Confirm and Track</button>
		<a class="v-btn-ghost" href="/items/new">Back</a>
	</form>
}

templ hidden(name, value string) {
	<input type="hidden" name={ name } value={ value }/>
}

templ hiddenBool(name string, value bool) {
	if value {
		<input type="hidden" name={ name } value="1"/>
	}
}

func fmtNumber(p float64, currency string) string {
	if p == 0 {
		return "—"
	}
	return fmt.Sprintf("%s%.2f", currencySymbol(currency), p)
}