<script lang="ts">
	import { character, charaNames } from '$lib/data/character';
	import { byChara, locations, groupPopulars } from '$lib/data/convo';
	import CharaPick from '$lib/CharaPick.svelte';

	const characters = character.global.filter((c) => byChara.global.has(c.chara_id));
	const minSuggest = 8;

	let charaID = $state(1001);
	let convo = $state(1);

	const options = $derived(byChara.global.get(charaID) ?? []);
	const cur = $derived(options.find((c) => c.number === convo));
	const cur1Name = $derived(cur?.chara_1 && charaNames.get(cur.chara_1)?.en);
	const cur2Name = $derived(cur?.chara_2 && charaNames.get(cur.chara_2)?.en);
	const cur3Name = $derived(cur?.chara_3 && charaNames.get(cur.chara_3)?.en);
	const alone = $derived([cur?.chara_1, cur?.chara_2, cur?.chara_3].filter((x) => x != null).length == 1 ? ' alone' : '');
	const suggested = $derived.by(() => {
		if (cur == null) {
			return [];
		}
		const u = groupPopulars.global[locations[cur.location].group].filter(
			(s) => charaNames.get(s[0]) != null && s[0] !== cur.chara_1 && s[0] !== cur.chara_2 && s[0] !== cur.chara_3,
		);
		const r = u.length <= minSuggest ? u : u.filter((s) => s[1] >= u[minSuggest][1]);
		return r.map(([chara_id, count]) => ({ chara_id, count }));
	});
</script>

<h1 class="text-4xl">Lobby Conversations</h1>
<div class="mx-auto mt-8 flex flex-col rounded-md text-center shadow-md ring md:max-w-xl md:flex-row">
	<div class="m-4 flex-1 md:mt-3">
		<label for="chara" class="hidden md:inline">Character</label>
		<CharaPick id="chara" {characters} class="w-full" bind:value={charaID} required />
	</div>
	<div class="m-4 flex-1 md:mt-3">
		<label for="convo" class="hidden md:inline">Conversation</label>
		<select id="convo" bind:value={convo} class="w-full">
			{#each options as opt (opt.number)}
				<option value={opt.number}>Slice of Life {opt.number}</option>
			{/each}
		</select>
	</div>
</div>
{#if cur}
	<div class="shadow-sm transition-shadow hover:shadow-md">
		<div class="mt-8 flex text-center text-lg">
			<span class="flex-1">{cur1Name}{alone}</span>
			{#if cur2Name}
				<span class="flex-1">{cur2Name}</span>
			{/if}
			{#if cur3Name}
				<span class="flex-1">{cur3Name}</span>
			{/if}
		</div>
		<div class="flex w-full text-center text-lg">
			<span class="flex-1">at {locations[cur.location].name.en}</span>
		</div>
	</div>
	<div class="mt-4 block text-center">
		<span>Other characters who appear here most often:</span>
	</div>
	<div class="mt-4 grid text-center shadow-sm transition-shadow ease-in hover:shadow-md hover:ease-out md:grid-cols-4">
		{#each suggested as s (s.chara_id)}
			<span>{charaNames.get(s.chara_id)?.en}: {s.count}&#xd7;</span>
		{/each}
	</div>
	<div class="mt-4 block text-center">
		<span>
			Set these characters to fixed positions (main, upgrades, story, races) to maximize the chance of getting this conversation.
		</span>
	</div>
{/if}
