package templates

// ShareRow is a single share grant shown in the UI, for either a calendar
// or an address book (Kind distinguishes them for form targets).
type ShareRow struct {
	ResourceName string
	SharedWith   string
	Permission   string // "read" or "write"
}

// ResourceCard describes one of the user's own calendars/address books
// plus who it's currently shared with.
type ResourceCard struct {
	Kind   string // "calendar" or "addressbook"
	Name   string
	Shares []ShareRow
}

// SharedWithMeItem describes a resource another user has shared with the
// current user.
type SharedWithMeItem struct {
	Kind       string
	Owner      string
	Name       string
	Permission string
}

templ Dashboard(username string, resources []ResourceCard, sharedWithMe []SharedWithMeItem) {
	@Layout("Dashboard", username) {
		<h1 class="text-2xl font-semibold mb-6">Your calendars &amp; address books</h1>

		<div class="flex gap-4 mb-6">
			<form
				class="flex items-end gap-2 bg-white rounded-lg border border-gray-200 p-4"
				hx-post="/web/resources/calendar"
				hx-target="#resources"
				hx-swap="outerHTML"
				hx-on::after-request="if(event.detail.successful) this.reset()"
			>
				<div>
					<label class="block text-xs text-gray-500 mb-1">New calendar</label>
					<input name="name" type="text" required pattern="[a-zA-Z0-9_-]{1,64}"
						placeholder="e.g. work"
						class="rounded-md border-gray-300 border px-2 py-1.5 text-sm"/>
				</div>
				<button type="submit"
					class="bg-indigo-600 text-white rounded-md px-3 py-1.5 text-sm font-medium hover:bg-indigo-700">
					Add
				</button>
			</form>
			<form
				class="flex items-end gap-2 bg-white rounded-lg border border-gray-200 p-4"
				hx-post="/web/resources/addressbook"
				hx-target="#resources"
				hx-swap="outerHTML"
				hx-on::after-request="if(event.detail.successful) this.reset()"
			>
				<div>
					<label class="block text-xs text-gray-500 mb-1">New address book</label>
					<input name="name" type="text" required pattern="[a-zA-Z0-9_-]{1,64}"
						placeholder="e.g. contacts"
						class="rounded-md border-gray-300 border px-2 py-1.5 text-sm"/>
				</div>
				<button type="submit"
					class="bg-indigo-600 text-white rounded-md px-3 py-1.5 text-sm font-medium hover:bg-indigo-700">
					Add
				</button>
			</form>
		</div>

		@ResourceList(resources)

		if len(sharedWithMe) > 0 {
			<h2 class="text-xl font-semibold mt-10 mb-4">Shared with you</h2>
			<ul class="divide-y divide-gray-200 bg-white rounded-lg border border-gray-200">
				for _, item := range sharedWithMe {
					<li class="px-4 py-3 flex items-center justify-between text-sm">
						<span>
							<span class="font-medium">{ item.Owner }</span> / { item.Name }
							<span class="text-gray-400">({ item.Kind })</span>
						</span>
						<span class="text-xs uppercase tracking-wide text-gray-500">{ item.Permission }</span>
					</li>
				}
			</ul>
		}
	}
}

// ResourceList renders the #resources container. It's re-rendered as a
// whole after a create/delete (which changes the set of cards), whereas a
// share update only swaps a single ResourceCardView.
templ ResourceList(resources []ResourceCard) {
	<div id="resources" class="space-y-6">
		for _, r := range resources {
			@ResourceCardView(r)
		}
		if len(resources) == 0 {
			<p class="text-sm text-gray-400">
				You don't have any calendars or address books yet — add one above.
			</p>
		}
	</div>
}

templ ResourceCardView(r ResourceCard) {
	<div id={ "resource-" + r.Kind + "-" + r.Name } class="bg-white rounded-lg border border-gray-200 p-5">
		<div class="flex items-center justify-between mb-3">
			<h2 class="font-medium">
				{ r.Name }
				<span class="text-xs uppercase tracking-wide text-gray-400 ml-2">{ r.Kind }</span>
			</h2>
			<button
				class="text-red-600 hover:underline text-xs"
				hx-delete={ resourceEndpoint(r.Kind) }
				hx-vals={ resourceVals(r.Name) }
				hx-target="#resources"
				hx-swap="outerHTML"
				hx-confirm={ "Delete " + r.Kind + " " + r.Name + "? This removes all its data and cannot be undone." }
			>
				Delete
			</button>
		</div>

		<ul class="divide-y divide-gray-100 mb-4">
			for _, sh := range r.Shares {
				<li class="py-2 flex items-center justify-between text-sm">
					<span>{ sh.SharedWith }</span>
					<span class="flex items-center gap-3">
						<span class="text-xs uppercase tracking-wide text-gray-500">{ sh.Permission }</span>
						<button
							class="text-red-600 hover:underline text-xs"
							hx-delete={ shareEndpoint(r.Kind) }
							hx-vals={ shareVals(r.Name, sh.SharedWith) }
							hx-target={ "#resource-" + r.Kind + "-" + r.Name }
							hx-swap="outerHTML"
							hx-confirm={ "Remove access for " + sh.SharedWith + "?" }
						>
							Remove
						</button>
					</span>
				</li>
			}
			if len(r.Shares) == 0 {
				<li class="py-2 text-sm text-gray-400">Not shared with anyone yet.</li>
			}
		</ul>

		<form
			class="flex items-end gap-2"
			hx-post={ shareEndpoint(r.Kind) }
			hx-target={ "#resource-" + r.Kind + "-" + r.Name }
			hx-swap="outerHTML"
		>
			<input type="hidden" name="resource" value={ r.Name }/>
			<div class="flex-1">
				<label class="block text-xs text-gray-500 mb-1">Username</label>
				<input name="shared_with" type="text" required
					class="w-full rounded-md border-gray-300 border px-2 py-1.5 text-sm"/>
			</div>
			<div>
				<label class="block text-xs text-gray-500 mb-1">Permission</label>
				<select name="permission" class="rounded-md border-gray-300 border px-2 py-1.5 text-sm">
					<option value="read">read</option>
					<option value="write">write</option>
				</select>
			</div>
			<button type="submit"
				class="bg-indigo-600 text-white rounded-md px-3 py-1.5 text-sm font-medium hover:bg-indigo-700">
				Share
			</button>
		</form>
	</div>
}

func shareEndpoint(kind string) string {
	if kind == "calendar" {
		return "/web/shares/calendar"
	}
	return "/web/shares/addressbook"
}

func shareVals(resource, sharedWith string) string {
	return `{"resource": "` + resource + `", "shared_with": "` + sharedWith + `"}`
}

func resourceEndpoint(kind string) string {
	if kind == "calendar" {
		return "/web/resources/calendar"
	}
	return "/web/resources/addressbook"
}

func resourceVals(name string) string {
	return `{"name": "` + name + `"}`
}