{% extends "base.html" %}
{% block title %}Upload Document{% endblock %}

{% block content %}
<div class="flex flex-col items-center justify-center p-4 sm:p-8">
  <h1 class="text-2xl sm:text-3xl font-bold mb-6 sm:mb-8">Upload Files</h1>

  <!-- File Upload Section -->
  <div class="w-full max-w-2xl mb-6 sm:mb-8">
    <h2 class="text-xl font-semibold mb-4">Upload from Device</h2>
    <form action="/api/ui-upload" method="POST" enctype="multipart/form-data">
      <div
        id="dropZone"
        class="border-4 border-dashed border-gray-300 rounded-lg p-6 sm:p-8 bg-white text-center w-full"
        role="button"
        tabindex="0"
        aria-label="File upload area. Drag and drop files here, or press Enter to browse files."
        ondragover="handleDragOver(event)"
        ondragleave="handleDragLeave(event)"
      >
        <p class="text-gray-500 mb-4 hidden sm:block">
          Drag &amp; drop files or folders here, or click to select files.
        </p>
        <p class="text-gray-500 mb-4 sm:hidden">
          Tap to select files or use the camera button below.
        </p>
        <input
          id="fileInput"
          type="file"
          class="hidden"
          onchange="handleFileSelect(event)"
          name="files"
          multiple
          aria-label="Select files to upload"
          accept="application/pdf,application/msword,application/vnd.openxmlformats-officedocument.wordprocessingml.document,application/vnd.ms-excel,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-powerpoint,application/vnd.openxmlformats-officedocument.presentationml.presentation,image/*"
        />
        <!-- Browse Files button (all devices) -->
        <button
          type="button"
          onclick="document.getElementById('fileInput').click()"
          class="bg-blue-500 hover:bg-blue-700 text-white font-bold py-3 px-6 rounded-lg transition duration-200 mb-4"
          style="min-height:44px;"
        >
          <i class="fas fa-folder-open mr-2" aria-hidden="true"></i> Browse Files
        </button>
        <div class="text-sm text-gray-500 mt-2">
          <p>Allowed types: PDF, Office documents (Word, Excel, PowerPoint, etc.), Images</p>
          <p>Maximum size: 500MB per file &bull; Directories are uploaded recursively</p>
        </div>
      </div>

      <!-- Camera capture button - mobile only -->
      <div class="mt-3 sm:hidden">
        <label
          class="w-full flex items-center justify-center gap-2 bg-green-500 hover:bg-green-700 text-white font-bold py-3 px-6 rounded-lg transition duration-200 cursor-pointer"
          style="min-height:44px;"
        >
          <i class="fas fa-camera" aria-hidden="true"></i> Take Photo / Scan Document
          <input
            id="cameraInput"
            type="file"
            class="hidden"
            onchange="handleFileSelect(event)"
            accept="image/*"
            capture="environment"
            aria-label="Take photo or scan document"
          />
        </label>
      </div>
    </form>
  </div>

  <!-- URL Upload Section -->
  <div class="w-full max-w-2xl mb-6 sm:mb-8">
    <h2 class="text-xl font-semibold mb-4">Upload from URL</h2>
    <div class="bg-white border border-gray-300 rounded-lg p-4 sm:p-6">
      <form id="urlUploadForm" class="space-y-4">
        <div>
          <label for="urlInput" class="block text-sm font-medium text-gray-700 mb-2">
            File URL
          </label>
          <input
            type="url"
            id="urlInput"
            name="url"
            placeholder="https://example.com/document.pdf"
            class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-blue-500"
            style="min-height:44px;"
            required
          />
          <p class="text-sm text-gray-500 mt-1">
            Enter a direct link to a file (PDF, Office documents, or images)
          </p>
        </div>
        <div>
          <label for="urlFilename" class="block text-sm font-medium text-gray-700 mb-2">
            Filename (optional)
          </label>
          <input
            type="text"
            id="urlFilename"
            name="filename"
            placeholder="my-document.pdf"
            class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-blue-500"
            style="min-height:44px;"
          />
          <p class="text-sm text-gray-500 mt-1">
            Leave empty to use filename from URL
          </p>
        </div>
        <button
          type="submit"
          class="w-full bg-blue-500 hover:bg-blue-700 text-white font-bold py-3 px-4 rounded-lg transition duration-200"
          style="min-height:44px;"
        >
          Download and Process
        </button>
      </form>
      <div id="urlStatusMessage" class="mt-4" aria-live="polite"></div>
    </div>
  </div>

  <div id="statusMessage" class="mt-4 text-gray-700" aria-live="polite"></div>
  <div id="uploadProgress" class="mt-4 w-full max-w-2xl" role="status" aria-live="polite"></div>
</div>
{% endblock %}

{% block scripts %}
<script>
  // Expose server-side upload throttling configuration to upload.js
  window.uploadConfig = {
    concurrency: {{ upload_concurrency }},
    queueDelayMs: {{ upload_queue_delay_ms }}
  };
</script>
<script src="/static/js/upload.js"></script>
<script>
  // Drag-and-drop / file input logic
  const dropZone = document.getElementById("dropZone");
  const fileInput = document.getElementById("fileInput");
  const statusMessage = document.getElementById("statusMessage");
  const uploadProgress = document.getElementById("uploadProgress");

  dropZone.addEventListener("click", () => fileInput.click());

  function handleDragOver(e) {
    e.preventDefault();
    e.dataTransfer.dropEffect = "copy";
    dropZone.classList.add("bg-gray-100");
  }

  function handleDragLeave(e) {
    e.preventDefault();
    dropZone.classList.remove("bg-gray-100");
  }

  dropZone.addEventListener("drop", async (e) => {
    e.preventDefault();
    dropZone.classList.remove("bg-gray-100");

    const files = await getFilesFromDataTransfer(e.dataTransfer);
    if (files.length) {
      // Create progress container
      const progressContainer = document.createElement("div");
      progressContainer.className = "space-y-2";
      uploadProgress.appendChild(progressContainer);

      // Use the shared processFiles function (queue-based)
      processFiles(files, progressContainer, statusMessage);
    }
  });

  function handleFileSelect(e) {
    if (e.target.files.length) {
      // Create progress container
      const progressContainer = document.createElement("div");
      progressContainer.className = "space-y-2";
      uploadProgress.appendChild(progressContainer);

      // Use the shared processFiles function
      processFiles(Array.from(e.target.files), progressContainer, statusMessage);
    }
  }

  // URL Upload handling
  const urlUploadForm = document.getElementById("urlUploadForm");
  const urlStatusMessage = document.getElementById("urlStatusMessage");

  urlUploadForm.addEventListener("submit", async (e) => {
    e.preventDefault();

    const urlInput = document.getElementById("urlInput");
    const urlFilename = document.getElementById("urlFilename");
    const url = urlInput.value.trim();
    const filename = urlFilename.value.trim();

    if (!url) {
      showUrlStatus("Please enter a URL", "error");
      return;
    }

    // Validate URL format
    try {
      new URL(url);
    } catch (error) {
      showUrlStatus("Invalid URL format", "error");
      return;
    }

    // Show loading state
    showUrlStatus("Downloading file from URL...", "info");

    const submitButton = urlUploadForm.querySelector('button[type="submit"]');
    const originalButtonText = submitButton.textContent;
    submitButton.textContent = "Processing...";
    submitButton.disabled = true;

    try {
      const requestBody = { url };
      if (filename) {
        requestBody.filename = filename;
      }

      const response = await fetch("/api/process-url", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify(requestBody),
      });

      const data = await response.json();

      if (response.ok) {
        showUrlStatus(
          `Success! File "${data.filename}" (${formatBytes(data.size)}) downloaded and queued for processing.`,
          "success"
        );
        // Clear form
        urlInput.value = "";
        urlFilename.value = "";

        // Optionally redirect to files page after short delay
        setTimeout(() => {
          window.location.href = "/files";
        }, 2000);
      } else {
        showUrlStatus(`Error: ${data.detail || "Failed to process URL"}`, "error");
      }
    } catch (error) {
      showUrlStatus(`Network error: ${error.message}`, "error");
    } finally {
      submitButton.textContent = originalButtonText;
      submitButton.disabled = false;
    }
  });

  function showUrlStatus(message, type) {
    urlStatusMessage.innerHTML = "";
    const alertDiv = document.createElement("div");
    alertDiv.className = `px-4 py-3 rounded ${
      type === "success"
        ? "bg-green-100 border border-green-400 text-green-700"
        : type === "error"
        ? "bg-red-100 border border-red-400 text-red-700"
        : "bg-blue-100 border border-blue-400 text-blue-700"
    }`;
    alertDiv.textContent = message;
    urlStatusMessage.appendChild(alertDiv);
  }

  function formatBytes(bytes) {
    // Reuse the existing formatFileSize function from upload.js
    return formatFileSize(bytes);
  }
</script>
{% endblock %}