package templates

import (
	"fmt"
	"mal/internal/database"
	"mal/internal/shared/ui"
	"math"
)

templ Watchlist(entries []database.GetUserWatchListRow, layout string, currentStatus string, sortBy string, sortOrder string) {
	@Layout("mal - watchlist", true) {
		<div class="mb-4 flex items-end justify-between gap-4 max-lg:flex-col max-lg:items-start">
			<div class="grid gap-1">
				<h2>Watchlist</h2>
				<p class="m-0 text-sm text-(--text-muted)">Track what you're watching with less noise.</p>
			</div>
			<div class="flex flex-wrap items-center justify-end gap-2 max-lg:w-full max-lg:justify-start">
				<a href="/api/watchlist/export" class="inline-flex min-w-16 items-center justify-center px-2 py-1 text-center text-xs leading-tight text-(--text-muted) no-underline hover:text-(--accent) hover:no-underline">Export</a>
				<button class="inline-flex min-w-16 cursor-pointer items-center justify-center border-0 bg-transparent px-2 py-1 text-center text-xs leading-tight text-(--text-muted) hover:text-(--accent)" type="button" onclick="document.getElementById('import-file').click()">Import</button>
				<form id="import-form" hx-post="/api/watchlist/import" hx-encoding="multipart/form-data" class="hidden">
					<input type="file" id="import-file" name="file" accept=".json" onchange="htmx.trigger('#import-form', 'submit')"/>
				</form>
				<div class="flex flex-wrap gap-2 max-md:flex-nowrap max-md:overflow-x-auto max-md:pb-1">
					<a href={ templ.URL(watchlistURL("grid", currentStatus, sortBy, sortOrder)) } class={ tabClass(layout == "grid") }>Grid</a>
					<a href={ templ.URL(watchlistURL("table", currentStatus, sortBy, sortOrder)) } class={ tabClass(layout == "table") }>Table</a>
				</div>
			</div>
		</div>
		<div class="mb-3 flex flex-wrap gap-2 max-md:flex-nowrap max-md:overflow-x-auto max-md:pb-1">
			<a href={ templ.URL(watchlistURL(layout, "all", sortBy, sortOrder)) } class={ tabClass(currentStatus == "all") }>All</a>
			<a href={ templ.URL(watchlistURL(layout, "watching", sortBy, sortOrder)) } class={ tabClass(currentStatus == "watching") }>Watching</a>
			<a href={ templ.URL(watchlistURL(layout, "on_hold", sortBy, sortOrder)) } class={ tabClass(currentStatus == "on_hold") }>On hold</a>
			<a href={ templ.URL(watchlistURL(layout, "plan_to_watch", sortBy, sortOrder)) } class={ tabClass(currentStatus == "plan_to_watch") }>Plan to watch</a>
			<a href={ templ.URL(watchlistURL(layout, "dropped", sortBy, sortOrder)) } class={ tabClass(currentStatus == "dropped") }>Dropped</a>
			<a href={ templ.URL(watchlistURL(layout, "completed", sortBy, sortOrder)) } class={ tabClass(currentStatus == "completed") }>Completed</a>
		</div>
		@ui.SortFilter(ui.SortFilterOptions{Sort: sortBy, Order: sortOrder, View: layout, Status: currentStatus})
		if len(entries) == 0 {
			@ui.EmptyState("Nothing here yet") {
				if currentStatus == "all" {
					Your watchlist is empty. <a href="/">Search for anime</a> to get started.
				} else {
					No anime in this category.
				}
			}
		} else {
			if layout == "grid" {
				<div class="grid grid-cols-2 gap-3 sm:grid-cols-3 md:gap-4 lg:grid-cols-4 xl:grid-cols-5">
					for _, entry := range entries {
						<div class="group relative min-w-0" id={ fmt.Sprintf("watchlist-entry-%d", entry.AnimeID) }>
							<a href={ templ.URL(watchURL(entry)) } class="flex flex-col bg-transparent text-inherit no-underline">
								<div class="flex w-full aspect-2/3 justify-center overflow-hidden">
									<img src={ entry.ImageUrl } alt={ entry.DisplayTitle() } class="block w-full object-cover object-center" loading="lazy"/>
								</div>
								<div class="mt-2 line-clamp-2 text-sm leading-snug text-(--text)">
									{ entry.DisplayTitle() }
								</div>
								@ifHasProgress(entry)
							</a>
							<button
								class="absolute right-2 top-2 h-6 w-6 cursor-pointer border-0 bg-(--overlay-subtle) text-(--text-muted) opacity-0 transition-opacity duration-150 group-hover:opacity-100 hover:text-(--danger)"
								hx-delete={ string(templ.URL(fmt.Sprintf("/api/watchlist/%d?from=watchlist", entry.AnimeID))) }
								hx-target={ fmt.Sprintf("#watchlist-entry-%d", entry.AnimeID) }
								hx-swap="delete"
							>&times;</button>
						</div>
					}
				</div>
			} else {
				<table class="block w-full overflow-x-auto whitespace-nowrap bg-(--panel) md:table md:overflow-visible md:whitespace-normal">
					<thead>
						<tr>
							<th class="p-2.5"></th>
							<th class="p-2.5 text-left text-xs text-(--text-faint)">Title</th>
							<th class="p-2.5"></th>
						</tr>
					</thead>
					<tbody>
						for _, entry := range entries {
							<tr class="hover:bg-(--panel-soft)" id={ fmt.Sprintf("watchlist-entry-%d", entry.AnimeID) }>
								<td class="p-2.5">
									<a href={ templ.URL(watchURL(entry)) }>
										<img src={ entry.ImageUrl } alt={ entry.DisplayTitle() } class="aspect-2/3 w-9 object-cover" loading="lazy"/>
									</a>
								</td>
								<td class="p-2.5 font-medium">
									<a href={ templ.URL(watchURL(entry)) }>
										{ entry.DisplayTitle() }
									</a>
									@ifHasProgress(entry)
								</td>
								<td class="w-24 p-2.5">
									<button
										class="cursor-pointer border-0 bg-transparent p-0 text-xs text-(--text-muted) hover:text-(--danger)"
										hx-delete={ string(templ.URL(fmt.Sprintf("/api/watchlist/%d?from=watchlist", entry.AnimeID))) }
										hx-target={ fmt.Sprintf("#watchlist-entry-%d", entry.AnimeID) }
										hx-swap="delete"
									>Remove</button>
								</td>
							</tr>
						}
					</tbody>
				</table>
			}
		}
	}
}

templ ifHasProgress(entry database.GetUserWatchListRow) {
	if entry.CurrentEpisode.Valid && entry.CurrentEpisode.Int64 > 0 && entry.Status != "completed" {
		<p class="m-0 mt-1 text-xs text-(--text-faint)">
			Continue ep { fmt.Sprintf("%d", entry.CurrentEpisode.Int64) }
			if entry.CurrentTimeSeconds > 0 {
				{ fmt.Sprintf(" · %s", formatProgressTime(entry.CurrentTimeSeconds)) }
			}
		</p>
	}
}

func watchURL(entry database.GetUserWatchListRow) string {
	return fmt.Sprintf("/anime/%d", entry.AnimeID)
}

func formatProgressTime(seconds float64) string {
	total := int(math.Round(seconds))
	if total < 0 {
		total = 0
	}

	minutes := total / 60
	remainingSeconds := total % 60
	return fmt.Sprintf("%02d:%02d", minutes, remainingSeconds)
}

func tabClass(active bool) string {
	base := "shrink-0 whitespace-nowrap bg-(--panel-soft) px-2 py-1 text-xs text-(--text-muted) no-underline hover:bg-(--surface-tab-hover) hover:text-(--text) hover:no-underline"
	if active {
		return "shrink-0 whitespace-nowrap bg-(--surface-tab-active) px-2 py-1 text-xs text-(--accent) no-underline hover:no-underline"
	}
	return base
}

func watchlistURL(view string, status string, sortBy string, sortOrder string) string {
	return fmt.Sprintf("/watchlist?view=%s&status=%s&sort=%s&order=%s", view, status, sortBy, sortOrder)
}