"""Blog editor panel rendering."""
from __future__ import annotations


def render_editor_panel(save_error: str | None = None, is_page: bool = False) -> str:
    """Build the WYSIWYG editor panel HTML for new post/page creation."""
    import os
    from quart import url_for as qurl, current_app
    from shared.browser.app.csrf import generate_csrf_token
    from shared.sx.helpers import sx_call

    csrf = generate_csrf_token()
    asset_url_fn = current_app.jinja_env.globals.get("asset_url", lambda p: "")
    editor_css = asset_url_fn("scripts/editor.css")
    editor_js = asset_url_fn("scripts/editor.js")
    sx_editor_js = asset_url_fn("scripts/sx-editor.js")

    upload_image_url = qurl("blog.editor_api.upload_image")
    upload_media_url = qurl("blog.editor_api.upload_media")
    upload_file_url = qurl("blog.editor_api.upload_file")
    oembed_url = qurl("blog.editor_api.oembed_proxy")
    snippets_url = qurl("blog.editor_api.list_snippets")
    unsplash_key = os.environ.get("UNSPLASH_ACCESS_KEY", "")

    title_placeholder = "Page title..." if is_page else "Post title..."
    create_label = "Create Page" if is_page else "Create Post"

    parts: list[str] = []

    if save_error:
        parts.append(sx_call("blog-editor-error", error=str(save_error)))

    parts.append(sx_call("blog-editor-form",
        csrf=csrf, title_placeholder=title_placeholder,
        create_label=create_label,
    ))

    parts.append(sx_call("blog-editor-styles", css_href=editor_css))
    parts.append(sx_call("sx-editor-styles"))

    init_js = (
        "console.log('[EDITOR-DEBUG] init script running');\n"
        "(function() {\n"
        "  console.log('[EDITOR-DEBUG] IIFE entered, mountEditor=', typeof window.mountEditor);\n"
        "  function init() {\n"
        "    var csrfToken = document.querySelector('input[name=\"csrf_token\"]').value;\n"
        f"    var uploadUrl = '{upload_image_url}';\n"
        "    var uploadUrls = {\n"
        "      image: uploadUrl,\n"
        f"      media: '{upload_media_url}',\n"
        f"      file:  '{upload_file_url}',\n"
        "    };\n"
        "\n"
        "    var fileInput     = document.getElementById('feature-image-file');\n"
        "    var addBtn        = document.getElementById('feature-image-add-btn');\n"
        "    var deleteBtn     = document.getElementById('feature-image-delete-btn');\n"
        "    var preview       = document.getElementById('feature-image-preview');\n"
        "    var emptyState    = document.getElementById('feature-image-empty');\n"
        "    var filledState   = document.getElementById('feature-image-filled');\n"
        "    var hiddenUrl     = document.getElementById('feature-image-input');\n"
        "    var hiddenCaption = document.getElementById('feature-image-caption-input');\n"
        "    var captionInput  = document.getElementById('feature-image-caption');\n"
        "    var uploading     = document.getElementById('feature-image-uploading');\n"
        "\n"
        "    function showFilled(url) {\n"
        "      preview.src = url;\n"
        "      hiddenUrl.value = url;\n"
        "      emptyState.classList.add('hidden');\n"
        "      filledState.classList.remove('hidden');\n"
        "      uploading.classList.add('hidden');\n"
        "    }\n"
        "\n"
        "    function showEmpty() {\n"
        "      preview.src = '';\n"
        "      hiddenUrl.value = '';\n"
        "      hiddenCaption.value = '';\n"
        "      captionInput.value = '';\n"
        "      emptyState.classList.remove('hidden');\n"
        "      filledState.classList.add('hidden');\n"
        "      uploading.classList.add('hidden');\n"
        "    }\n"
        "\n"
        "    function uploadFile(file) {\n"
        "      emptyState.classList.add('hidden');\n"
        "      uploading.classList.remove('hidden');\n"
        "      var fd = new FormData();\n"
        "      fd.append('file', file);\n"
        "      fetch(uploadUrl, {\n"
        "        method: 'POST',\n"
        "        body: fd,\n"
        "        headers: { 'X-CSRFToken': csrfToken },\n"
        "      })\n"
        "      .then(function(r) {\n"
        "        if (!r.ok) throw new Error('Upload failed (' + r.status + ')');\n"
        "        return r.json();\n"
        "      })\n"
        "      .then(function(data) {\n"
        "        var url = data.images && data.images[0] && data.images[0].url;\n"
        "        if (url) showFilled(url);\n"
        "        else { showEmpty(); alert('Upload succeeded but no image URL returned.'); }\n"
        "      })\n"
        "      .catch(function(e) {\n"
        "        showEmpty();\n"
        "        alert(e.message);\n"
        "      });\n"
        "    }\n"
        "\n"
        "    addBtn.addEventListener('click', function() { fileInput.click(); });\n"
        "    preview.addEventListener('click', function() { fileInput.click(); });\n"
        "    deleteBtn.addEventListener('click', function(e) {\n"
        "      e.stopPropagation();\n"
        "      showEmpty();\n"
        "    });\n"
        "    fileInput.addEventListener('change', function() {\n"
        "      if (fileInput.files && fileInput.files[0]) {\n"
        "        uploadFile(fileInput.files[0]);\n"
        "        fileInput.value = '';\n"
        "      }\n"
        "    });\n"
        "    captionInput.addEventListener('input', function() {\n"
        "      hiddenCaption.value = captionInput.value;\n"
        "    });\n"
        "\n"
        "    var excerpt = document.querySelector('textarea[name=\"custom_excerpt\"]');\n"
        "    function autoResize() {\n"
        "      excerpt.style.height = 'auto';\n"
        "      excerpt.style.height = excerpt.scrollHeight + 'px';\n"
        "    }\n"
        "    excerpt.addEventListener('input', autoResize);\n"
        "    autoResize();\n"
        "\n"
        "    window.mountEditor('lexical-editor', {\n"
        "      initialJson: null,\n"
        "      csrfToken: csrfToken,\n"
        "      uploadUrls: uploadUrls,\n"
        f"      oembedUrl: '{oembed_url}',\n"
        f"      unsplashApiKey: '{unsplash_key}',\n"
        f"      snippetsUrl: '{snippets_url}',\n"
        "    });\n"
        "\n"
        "    if (typeof SxEditor !== 'undefined') {\n"
        "      SxEditor.mount('sx-editor', {\n"
        "        initialSx: (document.getElementById('sx-content-input') || {}).value || null,\n"
        "        csrfToken: csrfToken,\n"
        "        uploadUrls: uploadUrls,\n"
        f"        oembedUrl: '{oembed_url}',\n"
        "        onChange: function(sx) {\n"
        "          document.getElementById('sx-content-input').value = sx;\n"
        "        }\n"
        "      });\n"
        "    }\n"
        "\n"
        "    document.addEventListener('keydown', function(e) {\n"
        "      if ((e.ctrlKey || e.metaKey) && e.key === 's') {\n"
        "        e.preventDefault();\n"
        "        document.getElementById('post-new-form').requestSubmit();\n"
        "      }\n"
        "    });\n"
        "  }\n"
        "\n"
        "  if (typeof window.mountEditor === 'function') {\n"
        "    init();\n"
        "  } else {\n"
        "    var _t = setInterval(function() {\n"
        "      if (typeof window.mountEditor === 'function') { clearInterval(_t); init(); }\n"
        "    }, 50);\n"
        "  }\n"
        "})();\n"
    )
    parts.append(sx_call("blog-editor-scripts",
                         js_src=editor_js,
                         sx_editor_js_src=sx_editor_js,
                         init_js=init_js))

    from shared.sx.parser import SxExpr
    return sx_call("blog-editor-panel",
        parts=SxExpr("(<> " + " ".join(parts) + ")")) if parts else ""