<script lang="ts">
	import { useQuery, useConvexClient } from 'convex-svelte';
	import { api } from '@sgse-app/backend/convex/_generated/api';
	import type { Id } from '@sgse-app/backend/convex/_generated/dataModel';
	import ActionGuard from '$lib/components/ActionGuard.svelte';
	import { goto } from '$app/navigation';

	const client = useConvexClient();

	// Estado do filtro
	let statusFilter = $state<'draft' | 'published' | 'archived' | undefined>(undefined);

	// Query de templates
	const templatesQuery = useQuery(
		api.flows.listTemplates,
		() => (statusFilter ? { status: statusFilter } : {})
	);

	// Modal de criação
	let showCreateModal = $state(false);
	let newTemplateName = $state('');
	let newTemplateDescription = $state('');
	let isCreating = $state(false);
	let createError = $state<string | null>(null);

	// Modal de confirmação de exclusão
	let showDeleteModal = $state(false);
	let templateToDelete = $state<{ _id: Id<'flowTemplates'>; name: string } | null>(null);
	let isDeleting = $state(false);
	let deleteError = $state<string | null>(null);

	function openCreateModal() {
		newTemplateName = '';
		newTemplateDescription = '';
		createError = null;
		showCreateModal = true;
	}

	function closeCreateModal() {
		showCreateModal = false;
		newTemplateName = '';
		newTemplateDescription = '';
		createError = null;
	}

	async function handleCreate() {
		if (!newTemplateName.trim()) {
			createError = 'O nome é obrigatório';
			return;
		}

		isCreating = true;
		createError = null;

		try {
			const templateId = await client.mutation(api.flows.createTemplate, {
				name: newTemplateName.trim(),
				description: newTemplateDescription.trim() || undefined
			});
			closeCreateModal();
			// Navegar para o editor
			goto(`/fluxos/${templateId}/editor`);
		} catch (e) {
			createError = e instanceof Error ? e.message : 'Erro ao criar template';
		} finally {
			isCreating = false;
		}
	}

	function openDeleteModal(template: { _id: Id<'flowTemplates'>; name: string }) {
		templateToDelete = template;
		deleteError = null;
		showDeleteModal = true;
	}

	function closeDeleteModal() {
		showDeleteModal = false;
		templateToDelete = null;
		deleteError = null;
	}

	async function handleDelete() {
		if (!templateToDelete) return;

		isDeleting = true;
		deleteError = null;

		try {
			await client.mutation(api.flows.deleteTemplate, { id: templateToDelete._id });
			closeDeleteModal();
		} catch (e) {
			deleteError = e instanceof Error ? e.message : 'Erro ao excluir template';
		} finally {
			isDeleting = false;
		}
	}

	async function handleStatusChange(templateId: Id<'flowTemplates'>, newStatus: 'draft' | 'published' | 'archived') {
		try {
			await client.mutation(api.flows.updateTemplate, {
				id: templateId,
				status: newStatus
			});
		} catch (e) {
			console.error('Erro ao atualizar status:', e);
		}
	}

	function getStatusBadge(status: 'draft' | 'published' | 'archived') {
		switch (status) {
			case 'draft':
				return { class: 'badge-warning', label: 'Rascunho' };
			case 'published':
				return { class: 'badge-success', label: 'Publicado' };
			case 'archived':
				return { class: 'badge-neutral', label: 'Arquivado' };
		}
	}

	function formatDate(timestamp: number): string {
		return new Date(timestamp).toLocaleDateString('pt-BR', {
			day: '2-digit',
			month: '2-digit',
			year: 'numeric'
		});
	}
</script>

<main class="mx-auto w-full max-w-7xl space-y-8 px-4 py-10">
	<!-- Header -->
	<section
		class="border-secondary/25 from-secondary/10 via-base-100 to-primary/20 relative overflow-hidden rounded-3xl border bg-linear-to-br p-8 shadow-2xl"
	>
		<div class="bg-secondary/20 absolute top-10 -left-10 h-40 w-40 rounded-full blur-3xl"></div>
		<div class="bg-primary/20 absolute right-0 -bottom-16 h-56 w-56 rounded-full blur-3xl"></div>
		<div class="relative z-10 flex flex-col gap-6 lg:flex-row lg:items-center lg:justify-between">
			<div class="max-w-3xl space-y-4">
				<span
					class="border-secondary/40 bg-secondary/10 text-secondary inline-flex w-fit items-center gap-2 rounded-full border px-4 py-1 text-xs font-semibold tracking-[0.28em] uppercase"
				>
					Gestão de Fluxos
				</span>
				<h1 class="text-base-content text-4xl leading-tight font-black sm:text-5xl">
					Templates de Fluxo
				</h1>
				<p class="text-base-content/70 text-base leading-relaxed sm:text-lg">
					Crie e gerencie templates de fluxo de trabalho. Templates definem os passos e
					responsabilidades que serão instanciados para projetos ou contratos.
				</p>
			</div>
			<div class="flex flex-col gap-4 sm:flex-row sm:items-center">
				<!-- Filtro de status -->
				<select
					class="select select-bordered"
					bind:value={statusFilter}
				>
					<option value={undefined}>Todos os status</option>
					<option value="draft">Rascunho</option>
					<option value="published">Publicado</option>
					<option value="archived">Arquivado</option>
				</select>

				<ActionGuard recurso="fluxos_templates" acao="criar">
					<button class="btn btn-secondary shadow-lg" onclick={openCreateModal}>
						<svg
							xmlns="http://www.w3.org/2000/svg"
							class="h-5 w-5"
							fill="none"
							viewBox="0 0 24 24"
							stroke="currentColor"
							aria-hidden="true"
						>
							<path
								stroke-linecap="round"
								stroke-linejoin="round"
								stroke-width="2"
								d="M12 4v16m8-8H4"
							/>
						</svg>
						Novo Template
					</button>
				</ActionGuard>
			</div>
		</div>
	</section>

	<!-- Lista de Templates -->
	<section class="bg-base-100 rounded-2xl border p-6 shadow-lg">
		{#if templatesQuery.isLoading}
			<div class="flex items-center justify-center py-12">
				<span class="loading loading-spinner loading-lg text-secondary"></span>
			</div>
		{:else if !templatesQuery.data || templatesQuery.data.length === 0}
			<div class="flex flex-col items-center justify-center py-12 text-center">
				<svg
					xmlns="http://www.w3.org/2000/svg"
					class="text-base-content/30 h-16 w-16"
					fill="none"
					viewBox="0 0 24 24"
					stroke="currentColor"
					aria-hidden="true"
				>
					<path
						stroke-linecap="round"
						stroke-linejoin="round"
						stroke-width="1.5"
						d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-3 7h3m-3 4h3m-6-4h.01M9 16h.01"
					/>
				</svg>
				<h3 class="text-base-content/70 mt-4 text-lg font-semibold">Nenhum template encontrado</h3>
				<p class="text-base-content/50 mt-2">
					{statusFilter ? 'Não há templates com este status.' : 'Clique em "Novo Template" para criar o primeiro.'}
				</p>
			</div>
		{:else}
			<div class="grid gap-6 md:grid-cols-2 lg:grid-cols-3">
				{#each templatesQuery.data as template (template._id)}
					{@const statusBadge = getStatusBadge(template.status)}
					<article
						class="card bg-base-200/50 hover:bg-base-200 border transition-all duration-200 hover:shadow-md"
					>
						<div class="card-body">
							<div class="flex items-start justify-between gap-2">
								<h2 class="card-title text-lg">{template.name}</h2>
								<span class="badge {statusBadge.class}">{statusBadge.label}</span>
							</div>

							{#if template.description}
								<p class="text-base-content/60 text-sm line-clamp-2">
									{template.description}
								</p>
							{/if}

							<div class="text-base-content/50 mt-2 flex flex-wrap gap-4 text-xs">
								<span class="flex items-center gap-1">
									<svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
										<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2" />
									</svg>
									{template.stepsCount} passos
								</span>
								<span class="flex items-center gap-1">
									<svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
										<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z" />
									</svg>
									{formatDate(template.createdAt)}
								</span>
							</div>

							<div class="card-actions mt-4 justify-between">
								<div class="dropdown">
									<button class="btn btn-ghost btn-sm" aria-label="Alterar status">
										<svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
											<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 5v.01M12 12v.01M12 19v.01M12 6a1 1 0 110-2 1 1 0 010 2zm0 7a1 1 0 110-2 1 1 0 010 2zm0 7a1 1 0 110-2 1 1 0 010 2z" />
										</svg>
									</button>
									<ul class="dropdown-content menu bg-base-100 rounded-box z-10 w-52 p-2 shadow" role="menu">
										{#if template.status !== 'draft'}
											<li>
												<button onclick={() => handleStatusChange(template._id, 'draft')}>
													Voltar para Rascunho
												</button>
											</li>
										{/if}
										{#if template.status !== 'published'}
											<li>
												<button onclick={() => handleStatusChange(template._id, 'published')}>
													Publicar
												</button>
											</li>
										{/if}
										{#if template.status !== 'archived'}
											<li>
												<button onclick={() => handleStatusChange(template._id, 'archived')}>
													Arquivar
												</button>
											</li>
										{/if}
										<li class="mt-2 border-t pt-2">
											<button class="text-error" onclick={() => openDeleteModal(template)}>
												Excluir
											</button>
										</li>
									</ul>
								</div>

								<a
									href="/fluxos/{template._id}/editor"
									class="btn btn-secondary btn-sm"
								>
									<svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
										<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" />
									</svg>
									Editar
								</a>
							</div>
						</div>
					</article>
				{/each}
			</div>
		{/if}
	</section>

	<!-- Link para Instâncias -->
	<section class="flex justify-center">
		<a href="/licitacoes/fluxos" class="btn btn-outline btn-lg">
			<svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
				<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4" />
			</svg>
			Ver Fluxos de Trabalho
		</a>
	</section>
</main>

<!-- Modal de Criação -->
{#if showCreateModal}
	<div class="modal modal-open">
		<div class="modal-box">
			<h3 class="text-lg font-bold">Novo Template de Fluxo</h3>

			{#if createError}
				<div class="alert alert-error mt-4">
					<svg
						xmlns="http://www.w3.org/2000/svg"
						class="h-6 w-6 shrink-0 stroke-current"
						fill="none"
						viewBox="0 0 24 24"
						aria-hidden="true"
					>
						<path
							stroke-linecap="round"
							stroke-linejoin="round"
							stroke-width="2"
							d="M10 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2m7-2a9 9 0 11-18 0 9 9 0 0118 0z"
						/>
					</svg>
					<span>{createError}</span>
				</div>
			{/if}

			<form onsubmit={(e) => { e.preventDefault(); handleCreate(); }} class="mt-4 space-y-4">
				<div class="form-control">
					<label class="label" for="template-name">
						<span class="label-text">Nome do Template</span>
					</label>
					<input
						type="text"
						id="template-name"
						bind:value={newTemplateName}
						class="input input-bordered w-full"
						placeholder="Ex: Fluxo de Aprovação de Contrato"
						required
					/>
				</div>

				<div class="form-control">
					<label class="label" for="template-description">
						<span class="label-text">Descrição (opcional)</span>
					</label>
					<textarea
						id="template-description"
						bind:value={newTemplateDescription}
						class="textarea textarea-bordered w-full"
						placeholder="Descreva o propósito deste fluxo..."
						rows="3"
					></textarea>
				</div>

				<div class="modal-action">
					<button type="button" class="btn" onclick={closeCreateModal} disabled={isCreating}>
						Cancelar
					</button>
					<button type="submit" class="btn btn-secondary" disabled={isCreating}>
						{#if isCreating}
							<span class="loading loading-spinner loading-sm"></span>
						{/if}
						Criar e Editar
					</button>
				</div>
			</form>
		</div>
		<button type="button" class="modal-backdrop" onclick={closeCreateModal} aria-label="Fechar modal"></button>
	</div>
{/if}

<!-- Modal de Confirmação de Exclusão -->
{#if showDeleteModal && templateToDelete}
	<div class="modal modal-open">
		<div class="modal-box">
			<h3 class="text-lg font-bold text-error">Confirmar Exclusão</h3>

			{#if deleteError}
				<div class="alert alert-error mt-4">
					<svg
						xmlns="http://www.w3.org/2000/svg"
						class="h-6 w-6 shrink-0 stroke-current"
						fill="none"
						viewBox="0 0 24 24"
						aria-hidden="true"
					>
						<path
							stroke-linecap="round"
							stroke-linejoin="round"
							stroke-width="2"
							d="M10 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2m7-2a9 9 0 11-18 0 9 9 0 0118 0z"
						/>
					</svg>
					<span>{deleteError}</span>
				</div>
			{/if}

			<p class="py-4">
				Tem certeza que deseja excluir o template <strong>{templateToDelete.name}</strong>?
			</p>
			<p class="text-base-content/60 text-sm">
				Esta ação não pode ser desfeita. Templates com instâncias vinculadas não podem ser excluídos.
			</p>

			<div class="modal-action">
				<button class="btn" onclick={closeDeleteModal} disabled={isDeleting}>
					Cancelar
				</button>
				<button class="btn btn-error" onclick={handleDelete} disabled={isDeleting}>
					{#if isDeleting}
						<span class="loading loading-spinner loading-sm"></span>
					{/if}
					Excluir
				</button>
			</div>
		</div>
		<button type="button" class="modal-backdrop" onclick={closeDeleteModal} aria-label="Fechar modal"></button>
	</div>
{/if}

