<!--
Phase 19 read-only ship-group inspector. Renders the documented field
set per group variant (local / other / incoming / unidentified). The
inspector is mounted by the sidebar `inspector-tab.svelte` when the
selection has `kind === "shipGroup"`, and on the mobile breakpoint by
the `ship-group-sheet.svelte` overlay.

Phase 20 will fold action buttons (split / send / load / unload /
modernize / dismantle / transfer / assign-to-fleet) onto the local
variant — for Phase 19 the inspector is intentionally read-only.
-->
<script lang="ts">
	import type {
		ReportIncomingShipGroup,
		ReportLocalFleet,
		ReportLocalShipGroup,
		ReportOtherShipGroup,
		ReportPlanet,
		ReportUnidentifiedShipGroup,
		ShipClassSummary,
	} from "../../api/game-state";
	import { i18n, type TranslationKey } from "$lib/i18n/index.svelte";
	import Actions from "./ship-group/actions.svelte";

	export type ShipGroupSelection =
		| { variant: "local"; group: ReportLocalShipGroup }
		| { variant: "other"; group: ReportOtherShipGroup }
		| { variant: "incoming"; group: ReportIncomingShipGroup }
		| { variant: "unidentified"; group: ReportUnidentifiedShipGroup };

	type Props = {
		selection: ShipGroupSelection;
		planets: ReportPlanet[];
		localShipClass?: ShipClassSummary[];
		localFleets?: ReportLocalFleet[];
		otherRaces?: string[];
		mapWidth?: number;
		mapHeight?: number;
		localPlayerDrive?: number;
		localPlayerWeapons?: number;
		localPlayerShields?: number;
		localPlayerCargo?: number;
	};
	let {
		selection,
		planets,
		localShipClass = [],
		localFleets = [],
		otherRaces = [],
		mapWidth = 1,
		mapHeight = 1,
		localPlayerDrive = 0,
		localPlayerWeapons = 0,
		localPlayerShields = 0,
		localPlayerCargo = 0,
	}: Props = $props();

	const kindKeyMap: Record<ShipGroupSelection["variant"], TranslationKey> = {
		local: "game.inspector.ship_group.kind.local",
		other: "game.inspector.ship_group.kind.other",
		incoming: "game.inspector.ship_group.kind.incoming",
		unidentified: "game.inspector.ship_group.kind.unidentified",
	};

	const cargoLoadKeyMap = {
		COL: "game.inspector.ship_group.cargo.col",
		CAP: "game.inspector.ship_group.cargo.cap",
		MAT: "game.inspector.ship_group.cargo.mat",
		EMP: "game.inspector.ship_group.cargo.emp",
	} as const;

	const planetIndex = $derived.by(() => {
		const m = new Map<number, ReportPlanet>();
		for (const p of planets) m.set(p.number, p);
		return m;
	});

	function planetLabel(number: number): string {
		const planet = planetIndex.get(number);
		if (planet === undefined) return `#${number}`;
		if (planet.name === "" || planet.name === undefined) return `#${number}`;
		return planet.name;
	}

	function formatNumber(value: number): string {
		return value.toLocaleString(undefined, { maximumFractionDigits: 2 });
	}

	function cargoLabel(cargo: "NONE" | "COL" | "CAP" | "MAT" | "EMP"): string {
		if (cargo === "NONE") {
			return i18n.t("game.inspector.ship_group.cargo.none");
		}
		return i18n.t(cargoLoadKeyMap[cargo]);
	}

	const kindLabel = $derived(i18n.t(kindKeyMap[selection.variant]));
</script>

<section
	class="inspector"
	data-testid="inspector-ship-group"
	data-variant={selection.variant}
>
	<header>
		<p class="kind" data-testid="inspector-ship-group-kind">{kindLabel}</p>
		{#if selection.variant === "local" || selection.variant === "other"}
			<h3 class="name" data-testid="inspector-ship-group-class">
				{selection.group.class}
			</h3>
		{/if}
	</header>

	{#if selection.variant === "local"}
		<Actions
			group={selection.group}
			{planets}
			{localShipClass}
			{localFleets}
			{otherRaces}
			{mapWidth}
			{mapHeight}
			{localPlayerDrive}
			{localPlayerWeapons}
			{localPlayerShields}
			{localPlayerCargo}
		/>
	{/if}

	{#if selection.variant === "local" || selection.variant === "other"}
		{@const g = selection.group}
		{@const onPlanet = g.origin === null || g.range === null}
		<dl class="fields">
			<div class="field" data-testid="inspector-ship-group-field-count">
				<dt>{i18n.t("game.inspector.ship_group.field.count")}</dt>
				<dd>{g.count}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-drive">
				<dt>{i18n.t("game.inspector.ship_group.field.drive")}</dt>
				<dd>{formatNumber(g.tech.drive)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-weapons">
				<dt>{i18n.t("game.inspector.ship_group.field.weapons")}</dt>
				<dd>{formatNumber(g.tech.weapons)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-shields">
				<dt>{i18n.t("game.inspector.ship_group.field.shields")}</dt>
				<dd>{formatNumber(g.tech.shields)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-cargo-tech">
				<dt>{i18n.t("game.inspector.ship_group.field.cargo_tech")}</dt>
				<dd>{formatNumber(g.tech.cargo)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-mass">
				<dt>{i18n.t("game.inspector.ship_group.field.mass")}</dt>
				<dd>{formatNumber(g.mass)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-cargo-load">
				<dt>{i18n.t("game.inspector.ship_group.field.cargo_load")}</dt>
				<dd>
					{#if g.cargo === "NONE"}
						{cargoLabel(g.cargo)}
					{:else}
						{cargoLabel(g.cargo)} × {formatNumber(g.load)}
					{/if}
				</dd>
			</div>

			{#if onPlanet}
				<div class="field" data-testid="inspector-ship-group-field-location">
					<dt>{i18n.t("game.inspector.ship_group.field.location")}</dt>
					<dd>{planetLabel(g.destination)}</dd>
				</div>
			{:else}
				<div class="field" data-testid="inspector-ship-group-field-from">
					<dt>{i18n.t("game.inspector.ship_group.field.from")}</dt>
					<dd>{planetLabel(g.origin!)}</dd>
				</div>
				<div class="field" data-testid="inspector-ship-group-field-to">
					<dt>{i18n.t("game.inspector.ship_group.field.to")}</dt>
					<dd>{planetLabel(g.destination)}</dd>
				</div>
				<div class="field" data-testid="inspector-ship-group-field-distance">
					<dt>{i18n.t("game.inspector.ship_group.field.distance")}</dt>
					<dd>{formatNumber(g.range!)}</dd>
				</div>
			{/if}

			{#if selection.variant === "local"}
				<div class="field" data-testid="inspector-ship-group-field-fleet">
					<dt>{i18n.t("game.inspector.ship_group.field.fleet")}</dt>
					<dd>
						{selection.group.fleet ?? i18n.t("game.inspector.ship_group.fleet.none")}
					</dd>
				</div>
				<div class="field" data-testid="inspector-ship-group-field-state">
					<dt>{i18n.t("game.inspector.ship_group.field.state")}</dt>
					<dd>{selection.group.state}</dd>
				</div>
			{/if}
		</dl>
	{:else if selection.variant === "incoming"}
		{@const g = selection.group}
		{@const eta = g.speed > 0 ? Math.ceil(g.distance / g.speed) : null}
		<dl class="fields">
			<div class="field" data-testid="inspector-ship-group-field-from">
				<dt>{i18n.t("game.inspector.ship_group.field.from")}</dt>
				<dd>{planetLabel(g.origin)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-to">
				<dt>{i18n.t("game.inspector.ship_group.field.to")}</dt>
				<dd>{planetLabel(g.destination)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-distance">
				<dt>{i18n.t("game.inspector.ship_group.field.distance")}</dt>
				<dd>{formatNumber(g.distance)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-speed">
				<dt>{i18n.t("game.inspector.ship_group.field.speed")}</dt>
				<dd>{formatNumber(g.speed)}</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-eta">
				<dt>{i18n.t("game.inspector.ship_group.field.eta")}</dt>
				<dd>
					{eta === null
						? i18n.t("game.designer.ship_class.preview.unavailable")
						: eta}
				</dd>
			</div>
			<div class="field" data-testid="inspector-ship-group-field-mass">
				<dt>{i18n.t("game.inspector.ship_group.field.mass")}</dt>
				<dd>{formatNumber(g.mass)}</dd>
			</div>
		</dl>
	{:else}
		<dl class="fields">
			<div
				class="field"
				data-testid="inspector-ship-group-field-coordinates"
			>
				<dt>{i18n.t("game.inspector.ship_group.field.coordinates")}</dt>
				<dd>
					({formatNumber(selection.group.x)}, {formatNumber(selection.group.y)})
				</dd>
			</div>
		</dl>
		<p class="hint" data-testid="inspector-ship-group-no-data">
			{i18n.t("game.inspector.ship_group.unidentified_no_data")}
		</p>
	{/if}
</section>

<style>
	.inspector {
		padding: 1rem;
		font-family: system-ui, sans-serif;
		display: flex;
		flex-direction: column;
		gap: 0.75rem;
	}
	header {
		display: flex;
		flex-direction: column;
		gap: 0.15rem;
	}
	.kind {
		margin: 0;
		font-size: 0.75rem;
		text-transform: uppercase;
		letter-spacing: 0.05em;
		color: var(--color-text-muted);
	}
	.name {
		margin: 0;
		font-size: 1.05rem;
	}
	.fields {
		margin: 0;
		display: grid;
		grid-template-columns: max-content 1fr;
		row-gap: 0.25rem;
		column-gap: 0.75rem;
	}
	.field {
		display: contents;
	}
	.field dt {
		color: var(--color-text-muted);
		font-size: 0.85rem;
	}
	.field dd {
		margin: 0;
		font-variant-numeric: tabular-nums;
		font-size: 0.9rem;
	}
	.hint {
		margin: 0;
		color: var(--color-text-muted);
		font-size: 0.85rem;
	}
</style>
