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<script lang="ts">

import I18nKey from "@i18n/i18nKey";

import { i18n } from "@i18n/translation";

import { onMount } from "svelte";

import Icon from "@/components/common/Icon.svelte";

import type { SearchResult } from "@/global";

import { url as formatUrl } from "@/utils/url-utils";



// --- Props ---

export let title = i18n(I18nKey.search);

export let description = "";



// --- State ---

let keyword = "";

let results: SearchResult[] = [];

let isSearching = false;

let initialized = false;



// 在客户端获取 URL 参数

const getInitialKeyword = (): string => {

	if (typeof window !== "undefined") {

		const searchParams = new URLSearchParams(window.location.search);

		return searchParams.get("q") || "";

	}

	return "";

};



// --- Mocks for Dev Mode ---

const fakeResult: SearchResult[] = [

	{

		url: formatUrl("/"),

		meta: { title: "Dev Mode Search Result 1" },

		excerpt: "This is a <mark>mock</mark> result for development.",

	},

	{

		url: formatUrl("/"),

		meta: { title: "Dev Mode Search Result 2" },

		excerpt: "Pagefind only works in <mark>production</mark> build.",

	},

];



// --- Core Search Logic ---

const search = async () => {

	if (!initialized || !keyword.trim()) {

		results = [];

		return;

	}

	isSearching = true;



	try {

		if (import.meta.env.PROD && window.pagefind) {

			const response = await window.pagefind.search(keyword);

			const rawResults = await Promise.all(

				response.results.map((item) => item.data()),

			);

			results = rawResults;

		} else if (import.meta.env.DEV) {

			// 开发模式下的模拟结果

			results = fakeResult.filter(

				(item) =>

					item.excerpt.toLowerCase().includes(keyword.toLowerCase()) ||

					item.meta.title.toLowerCase().includes(keyword.toLowerCase()),

			);

		}

	} catch (error) {

		console.error("Search error:", error);

		results = [];

	} finally {

		isSearching = false;

	}

};



// --- Initialization onMount ---

onMount(() => {

	const initialize = async () => {

		initialized = true;



		// 从 URL 获取初始关键词

		const initialKeyword = getInitialKeyword();

		if (initialKeyword) {

			keyword = initialKeyword;

		}



		// 如果有关键词,自动执行搜索

		if (keyword.trim()) {

			await search();

		}

	};



	// 开发环境直接初始化

	if (import.meta.env.DEV) {

		initialize();

	} else {

		// 生产环境等待 Pagefind 加载

		if (window.pagefind) {

			initialize();

		} else {

			document.addEventListener("pagefindready", initialize, {

				once: true,

			});

		}

	}

});



let debounceTimer: NodeJS.Timeout;

const handleInput = () => {

	clearTimeout(debounceTimer);

	debounceTimer = setTimeout(() => {

		search();

	}, 300);

};

</script>

<div class="card-base px-6 py-6 md:px-9 md:py-6 mb-4 rounded-(--radius-large)">
    <!-- Title Section -->
    <div class="mb-4">
        <div class="flex items-center gap-3 mb-3">
            <div class="h-8 w-8 rounded-lg bg-(--primary) flex items-center justify-center text-white dark:text-black/70">
                <Icon icon="material-symbols:search" class="text-[1.5rem]"></Icon>
            </div>
            <h1 class="text-3xl font-bold text-90">
                {title}
            </h1>
        </div>
        {#if description}
            <p class="text-base text-50 leading-relaxed">
                {description}
            </p>
        {/if}
    </div>

    <!-- Search Bar -->
    <div class="relative flex">
        <div class="relative flex-1">
            <div class="absolute inset-y-0 left-0 flex items-center pl-3 pointer-events-none">
                <Icon icon="material-symbols:search" class="text-2xl text-50" />
            </div>
            <input

                type="text"

                class="block w-full p-4 pl-10 text-sm bg-transparent border border-black/10 dark:border-white/10 rounded-lg focus:ring-2 focus:ring-(--primary) focus:border-(--primary) hover:border-black/20 dark:hover:border-white/20 text-75 placeholder:opacity-50 transition-colors outline-hidden"

                placeholder={i18n(I18nKey.search)}

                bind:value={keyword}

                on:input={handleInput}

            >
        </div>
    </div>
</div>

<div class="grid grid-cols-1 gap-4">
    <!-- Results Area -->
    <div>
        {#if isSearching}
            <div class="flex justify-center py-10">
                <Icon icon="svg-spinners:ring-resize" class="text-4xl text-(--primary)" />
            </div>
        {:else if results.length > 0}
            <div class="space-y-4">
                {#each results as result}
                    <div class="card-base p-6 block rounded-(--radius-large)">
                        <a href={result.url} class="block group">
                            <h5 class="mb-2 text-2xl font-bold tracking-tight text-90 group-hover:text-(--primary) transition-colors">
                                {@html result.meta.title}
                            </h5>
                            <p class="font-normal text-75">
                                {@html result.excerpt}
                            </p>
                        </a>
                    </div>
                {/each}
            </div>
        {:else if keyword}
            <div class="card-base p-10 text-center text-50 rounded-(--radius-large)">
                {i18n(I18nKey.searchNoResults)}
            </div>
        {:else}
             <div class="card-base p-10 text-center text-50 rounded-(--radius-large)">
                {i18n(I18nKey.searchTypeSomething)}
            </div>
        {/if}
    </div>
</div>

<style>

    /* 关键字高亮效果 - 主题色 */

    :global(mark) {

        background: transparent;

        color: var(--primary);

        font-weight: 600;

        padding: 0 0.1em;

    }

</style>