#include "ProjectPanelSupport.h"

namespace XCEngine::UI::Editor::App {

using namespace ProjectPanelSupport;

void ProjectPanel::Append(UIDrawList& drawList) const {
    if (!m_visible || m_layout.bounds.width <= 0.0f || m_layout.bounds.height <= 0.0f) {
        return;
    }

    const auto& assetEntries = m_browserModel.GetAssetEntries();

    drawList.AddFilledRect(m_layout.bounds, kSurfaceColor);
    drawList.AddFilledRect(m_layout.leftPaneRect, kPaneColor);
    drawList.AddFilledRect(m_layout.rightPaneRect, kPaneColor);
    drawList.AddFilledRect(
        m_layout.dividerRect,
        ResolveUIEditorDockHostPalette().splitterColor);

    drawList.AddFilledRect(m_layout.browserHeaderRect, kHeaderColor);
    drawList.AddFilledRect(
        UIRect(
            m_layout.browserHeaderRect.x,
            m_layout.browserHeaderRect.y + m_layout.browserHeaderRect.height - kHeaderBottomBorderThickness,
            m_layout.browserHeaderRect.width,
            kHeaderBottomBorderThickness),
        ResolveUIEditorDockHostPalette().splitterColor);

    const Widgets::UIEditorTreeViewPalette treePalette = BuildEditorTreeViewPalette();
    const Widgets::UIEditorTreeViewMetrics treeMetrics = BuildEditorTreeViewMetrics();
    AppendUIEditorTreeViewBackground(
        drawList,
        m_treeFrame.layout,
        m_browserModel.GetTreeItems(),
        m_folderSelection,
        m_treeInteractionState.treeViewState,
        treePalette,
        treeMetrics);
    AppendUIEditorTreeViewForeground(
        drawList,
        m_treeFrame.layout,
        m_browserModel.GetTreeItems(),
        treePalette,
        treeMetrics);

    drawList.PushClipRect(m_layout.browserHeaderRect);
    for (std::size_t index = 0u; index < m_layout.breadcrumbItems.size(); ++index) {
        const BreadcrumbItemLayout& item = m_layout.breadcrumbItems[index];
        const UIColor textColor =
            item.separator
                ? kTextMuted
                : (index == m_hoveredBreadcrumbIndex && item.clickable
                    ? kTextStrong
                    : (item.current ? kTextPrimary : kTextMuted));
        const float textWidth = MeasureTextWidth(m_textMeasurer, item.label, kHeaderFontSize);
        const float textX = item.separator
            ? item.rect.x
            : item.rect.x + (item.rect.width - textWidth) * 0.5f;
        drawList.AddText(
            UIPoint(textX, ResolveTextTop(item.rect.y, item.rect.height, kHeaderFontSize)),
            item.label,
            textColor,
            kHeaderFontSize);
    }
    drawList.PopClipRect();

    for (const AssetTileLayout& tile : m_layout.assetTiles) {
        if (tile.itemIndex >= assetEntries.size()) {
            continue;
        }

        const AssetEntry& assetEntry = assetEntries[tile.itemIndex];
        const bool selected = m_assetSelection.IsSelected(assetEntry.itemId);
        const bool hovered = m_hoveredAssetItemId == assetEntry.itemId;

        if (selected || hovered) {
            drawList.AddFilledRect(
                tile.tileRect,
                selected ? kTileSelectedColor : kTileHoverColor);
        }

        AppendTilePreview(drawList, tile.previewRect, assetEntry.directory);

        drawList.PushClipRect(tile.labelRect);
        const float textWidth =
            MeasureTextWidth(m_textMeasurer, assetEntry.displayName, kTileLabelFontSize);
        drawList.AddText(
            UIPoint(
                tile.labelRect.x + (tile.labelRect.width - textWidth) * 0.5f,
                ResolveTextTop(tile.labelRect.y, tile.labelRect.height, kTileLabelFontSize)),
            assetEntry.displayName,
            kTextPrimary,
            kTileLabelFontSize);
        drawList.PopClipRect();
    }

    if (assetEntries.empty()) {
        const UIRect messageRect(
            m_layout.gridRect.x,
            m_layout.gridRect.y,
            m_layout.gridRect.width,
            18.0f);
        drawList.AddText(
            UIPoint(messageRect.x, ResolveTextTop(messageRect.y, messageRect.height, kHeaderFontSize)),
            "Current folder is empty.",
            kTextMuted,
            kHeaderFontSize);
    }
}

} // namespace XCEngine::UI::Editor::App