const searchBtn = document.getElementById("searchBtn");
const input = document.getElementById("searchInput");
const resultBox = document.getElementById("results");

let currentPage = 1;
let totalPages = 1;
let lastKeywords = [];

function showLoading() {
    resultBox.innerHTML = "<li>加载中...</li>";
}

function renderPagination() {
    const pagination = document.createElement("div");
    pagination.className = "pagination";

    if (currentPage > 1) {
        const prevBtn = document.createElement("button");
        prevBtn.textContent = "上一页";
        prevBtn.onclick = () => fetchResults(lastKeywords, currentPage - 1);
        pagination.appendChild(prevBtn);
    }

    if (currentPage < totalPages) {
        const nextBtn = document.createElement("button");
        nextBtn.textContent = "下一页";
        nextBtn.onclick = () => fetchResults(lastKeywords, currentPage + 1);
        pagination.appendChild(nextBtn);
    }

    resultBox.appendChild(pagination);
}

async function fetchResults(keywords, page) {
    currentPage = page;
    lastKeywords = keywords;

    const keywordGroups = keywords.map(k => [k]);
    const requestBody = {
        keywordGroups,
        page: currentPage,
        size: 10
    };

    console.log("[INFO] 请求地址: http://app.wisdompulse.cn/search");
    console.log("[INFO] 请求方法: POST");
    console.log("[INFO] 请求体:", JSON.stringify(requestBody, null, 2));

    showLoading();

    try {
        const response = await fetch("http://app.wisdompulse.cn/search", {
            method: "POST",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify(requestBody)
        });

        console.log("[INFO] 响应状态:", response.status, response.statusText);
        const data = await response.json();
        console.log("[INFO] 响应体:", data);

        resultBox.innerHTML = "";

        if (!data.results || data.results.length === 0) {
            console.log("[INFO] 未返回结果数据");
            resultBox.innerHTML = "<li>未找到相关文档</li>";
            return;
        }

        totalPages = Math.ceil(data.total / data.size);

        data.results.forEach(doc => {
            const li = document.createElement("li");

            const cleanPath = doc.filepath.replace(/^import-data\//, "").replace(/\.md$/, ".html");
            const link = document.createElement("a");
            link.href = `http://share.wisdompulse.cn/public/${cleanPath}`;
            link.target = "_blank";
            link.textContent = doc.filename;

            const snippet = document.createElement("div");
            snippet.className = "summary";
            snippet.innerHTML = doc.summary?.slice(0, 300) + "...";

            li.appendChild(link);
            li.appendChild(snippet);
            resultBox.appendChild(li);
        });

        renderPagination();

    } catch (err) {
        console.error("[ERROR] 搜索失败:", err);
        resultBox.innerHTML = "<li>搜索失败，请检查网络或服务状态。</li>";
    }
}

function triggerSearch() {
    const inputValue = input.value.trim();
    console.log("[INFO] 用户输入关键词:", inputValue);

    if (!inputValue) {
        console.warn("[WARN] 输入为空");
        return;
    }

    const keywords = inputValue.split(/\s+/).filter(Boolean);
    fetchResults(keywords, 1);
}

searchBtn.addEventListener("click", triggerSearch);

// 支持按回车键直接搜索
input.addEventListener("keydown", e => {
    if (e.key === "Enter") {
        triggerSearch();
    }
});