// uploader.js
const dropArea = document.getElementById("drop-area");
const fileElem = document.getElementById("fileElem");
const uploadList = document.getElementById("uploadList");
const folderNameInput = document.getElementById("folderName");
const bucketNameInput = document.getElementById("bucketName");
const jsonResult = document.getElementById("jsonResult");

const API_UPLOAD = "http://app.wisdompulse.cn/api/v1/doc/upload-files";

dropArea.addEventListener("click", () => fileElem.click());
dropArea.addEventListener("dragover", e => {
    e.preventDefault(); dropArea.classList.add("dragover");
});
dropArea.addEventListener("dragleave", e => {
    e.preventDefault(); dropArea.classList.remove("dragover");
});
dropArea.addEventListener("drop", e => {
    e.preventDefault(); dropArea.classList.remove("dragover");
    handleFiles(e.dataTransfer.files);
});
fileElem.addEventListener("change", () => handleFiles(fileElem.files));

function getTargetFolder() {
    let folder = (folderNameInput.value || "").trim();
    if (!folder) folder = "default";
    folder = folder.replace(/^\/+|\/+$/g, "");
    return folder;
}
function getBucketName() {
    let bucket = (bucketNameInput.value || "").trim();
    return bucket.replace(/^\/+|\/+$/g, "");
}

// 工具：为单个文件显示进度
function createProgressItem(filename) {
    const wrapper = document.createElement("div");
    wrapper.className = "progress-item";
    wrapper.innerHTML = `
    <span class="file-label">${filename}</span>
    <progress value="0" max="100" style="width:60%;margin:0 10px;"></progress>
    <span class="percent-label">0%</span>
    <span class="upload-msg"></span>
  `;
    uploadList.appendChild(wrapper);
    return wrapper;
}

function showMsg(msg, ok) {
    const div = document.createElement("div");
    div.className = ok ? "success" : "error";
    div.innerHTML = msg;
    uploadList.appendChild(div);
}

// 批量上传（单次FormData），统一进度条管理，JSON右侧展示
function handleFiles(fileList) {
    uploadList.innerHTML = "";
    jsonResult.textContent = "{}";
    const bucket = getBucketName();
    if (!bucket) {
        showMsg("请输入 Bucket 名称", false);
        return;
    }
    if (!fileList || !fileList.length) return;
    const folder = getTargetFolder();

    // 显示所有文件的进度条
    const fileArr = Array.from(fileList);
    const progressItems = {};
    fileArr.forEach(f => {
        progressItems[f.name] = createProgressItem(f.name);
    });

    // 构造FormData，支持批量
    const form = new FormData();
    form.append("bucket", bucket);
    if (folder) form.append("folder", folder);
    fileArr.forEach(f => form.append("files", f, f.name));

    // 单一xhr，汇总进度
    const xhr = new XMLHttpRequest();
    xhr.open("POST", API_UPLOAD);

    xhr.upload.onprogress = function (e) {
        if (e.lengthComputable) {
            // 进度只到99%，收到响应才到100%
            let percent = Math.round((e.loaded / e.total) * 98); // 98留点余量
            percent = Math.min(percent, 98);
            fileArr.forEach(f => {
                const pi = progressItems[f.name];
                pi.querySelector("progress").value = percent;
                pi.querySelector(".percent-label").textContent = percent + "%";
            });
        }
    };

    // 新增处理中提示
    xhr.upload.onload = function () {
        fileArr.forEach(f => {
            const pi = progressItems[f.name];
            pi.querySelector("progress").value = 99;
            pi.querySelector(".percent-label").textContent = "99%";
            const msgSpan = pi.querySelector(".upload-msg");
            msgSpan.innerHTML = "<span style='color:#888;'>服务器处理中...</span>";
        });
    };

    xhr.onload = function () {
        fileArr.forEach(f => {
            const pi = progressItems[f.name];
            pi.querySelector("progress").value = 100;
            pi.querySelector(".percent-label").textContent = "100%";
        });

        // 成功
        if (xhr.status === 200) {
            try {
                const res = JSON.parse(xhr.responseText);
                jsonResult.textContent = JSON.stringify(res.files, null, 2);
                fileArr.forEach(f => {
                    const pi = progressItems[f.name];
                    const msgSpan = pi.querySelector(".upload-msg");
                    if (res.files && res.files[f.name]) {
                        msgSpan.innerHTML = `<a href="${res.files[f.name]}" target="_blank">${f.name}</a> 上传成功`;
                        msgSpan.className = "success upload-msg";
                    } else {
                        msgSpan.innerHTML = "上传成功";
                        msgSpan.className = "success upload-msg";
                    }
                });
            } catch (e) {
                jsonResult.textContent = "{}";
                fileArr.forEach(f => {
                    const pi = progressItems[f.name];
                    pi.querySelector(".upload-msg").innerHTML = "上传成功";
                    pi.querySelector(".upload-msg").className = "success upload-msg";
                });
            }
        }
        // Nginx/gateway 504/502等超时（后端可能还在处理）
        else if (xhr.status === 504 || xhr.status === 502) {
            jsonResult.textContent = "{}";
            fileArr.forEach(f => {
                const pi = progressItems[f.name];
                const msgSpan = pi.querySelector(".upload-msg");
                msgSpan.innerHTML = "服务器处理中，请稍后在目标目录查看上传结果";
                msgSpan.className = "success upload-msg";
            });
        }
        // 其它错误
        else {
            jsonResult.textContent = "{}";
            fileArr.forEach(f => {
                const pi = progressItems[f.name];
                const msgSpan = pi.querySelector(".upload-msg");
                msgSpan.innerHTML = "上传失败 " + xhr.status;
                msgSpan.className = "error upload-msg";
            });
        }
    };

    xhr.onerror = function () {
        fileArr.forEach(f => {
            const pi = progressItems[f.name];
            pi.querySelector(".upload-msg").innerHTML = "上传异常";
            pi.querySelector(".upload-msg").className = "error upload-msg";
        });
        jsonResult.textContent = "{}";
    };

    xhr.send(form);

}

// === 放在文件结尾，而不是 handleFiles 内部 ===
const bucketTip = document.getElementById("bucketTip");
bucketNameInput.addEventListener("change", function () {
    if (bucketNameInput.value === "kbase-priv") {
        bucketTip.innerHTML = "私有 bucket 中，文件的可访问链接有效期为 <b>7天</b>";
        bucketTip.style.color = "#ec0924";
    } else {
        bucketTip.innerHTML = "";
        bucketTip.style.color = "";
    }
});
// 页面加载时自动触发一次
bucketNameInput.dispatchEvent(new Event("change"));