crosspoint-reader-mod/src/components/themes/BaseTheme.cpp

#include "BaseTheme.h"

#include <GfxRenderer.h>
#include <HalStorage.h>
#include <Logging.h>
#include <Utf8.h>

#include <cstdint>
#include <string>

#include "Battery.h"
#include "I18n.h"
#include "RecentBooksStore.h"
#include "components/UITheme.h"
#include "fontIds.h"

// Internal constants
namespace {
constexpr int batteryPercentSpacing = 4;
constexpr int homeMenuMargin = 20;
constexpr int homeMarginTop = 30;

// Helper: draw battery icon at given position
void drawBatteryIcon(const GfxRenderer& renderer, int x, int y, int battWidth, int rectHeight, uint16_t percentage) {
  // Top line
  renderer.drawLine(x + 1, y, x + battWidth - 3, y);
  // Bottom line
  renderer.drawLine(x + 1, y + rectHeight - 1, x + battWidth - 3, y + rectHeight - 1);
  // Left line
  renderer.drawLine(x, y + 1, x, y + rectHeight - 2);
  // Battery end
  renderer.drawLine(x + battWidth - 2, y + 1, x + battWidth - 2, y + rectHeight - 2);
  renderer.drawPixel(x + battWidth - 1, y + 3);
  renderer.drawPixel(x + battWidth - 1, y + rectHeight - 4);
  renderer.drawLine(x + battWidth - 0, y + 4, x + battWidth - 0, y + rectHeight - 5);

  // The +1 is to round up, so that we always fill at least one pixel
  int filledWidth = percentage * (battWidth - 5) / 100 + 1;
  if (filledWidth > battWidth - 5) {
    filledWidth = battWidth - 5;  // Ensure we don't overflow
  }

  renderer.fillRect(x + 2, y + 2, filledWidth, rectHeight - 4);
}
}  // namespace

void BaseTheme::drawBatteryLeft(const GfxRenderer& renderer, Rect rect, const bool showPercentage) const {
  // Left aligned: icon on left, percentage on right (reader mode)
  const uint16_t percentage = battery.readPercentage();
  const int y = rect.y + 6;

  if (showPercentage) {
    const auto percentageText = std::to_string(percentage) + "%";
    renderer.drawText(SMALL_FONT_ID, rect.x + batteryPercentSpacing + BaseMetrics::values.batteryWidth, rect.y,
                      percentageText.c_str());
  }

  drawBatteryIcon(renderer, rect.x, y, BaseMetrics::values.batteryWidth, rect.height, percentage);
}

void BaseTheme::drawBatteryRight(const GfxRenderer& renderer, Rect rect, const bool showPercentage) const {
  // Right aligned: percentage on left, icon on right (UI headers)
  // rect.x is already positioned for the icon (drawHeader calculated it)
  const uint16_t percentage = battery.readPercentage();
  const int y = rect.y + 6;

  if (showPercentage) {
    const auto percentageText = std::to_string(percentage) + "%";
    const int textWidth = renderer.getTextWidth(SMALL_FONT_ID, percentageText.c_str());
    // Clear the area where we're going to draw the text to prevent ghosting
    const auto textHeight = renderer.getTextHeight(SMALL_FONT_ID);
    renderer.fillRect(rect.x - textWidth - batteryPercentSpacing, rect.y, textWidth, textHeight, false);
    // Draw text to the left of the icon
    renderer.drawText(SMALL_FONT_ID, rect.x - textWidth - batteryPercentSpacing, rect.y, percentageText.c_str());
  }

  // Icon is already at correct position from rect.x
  drawBatteryIcon(renderer, rect.x, y, BaseMetrics::values.batteryWidth, rect.height, percentage);
}

void BaseTheme::drawProgressBar(const GfxRenderer& renderer, Rect rect, const size_t current,
                                const size_t total) const {
  if (total == 0) {
    return;
  }

  // Use 64-bit arithmetic to avoid overflow for large files
  const int percent = static_cast<int>((static_cast<uint64_t>(current) * 100) / total);

  // Draw outline
  renderer.drawRect(rect.x, rect.y, rect.width, rect.height);

  // Draw filled portion
  const int fillWidth = (rect.width - 4) * percent / 100;
  if (fillWidth > 0) {
    renderer.fillRect(rect.x + 2, rect.y + 2, fillWidth, rect.height - 4);
  }

  // Draw percentage text centered below bar
  const std::string percentText = std::to_string(percent) + "%";
  renderer.drawCenteredText(UI_10_FONT_ID, rect.y + rect.height + 15, percentText.c_str());
}

void BaseTheme::drawButtonHints(GfxRenderer& renderer, const char* btn1, const char* btn2, const char* btn3,
                                const char* btn4) const {
  const GfxRenderer::Orientation orig_orientation = renderer.getOrientation();
  renderer.setOrientation(GfxRenderer::Orientation::Portrait);

  const int pageHeight = renderer.getScreenHeight();
  constexpr int buttonWidth = 106;
  constexpr int buttonHeight = BaseMetrics::values.buttonHintsHeight;
  constexpr int buttonY = BaseMetrics::values.buttonHintsHeight;  // Distance from bottom
  constexpr int textYOffset = 7;                                  // Distance from top of button to text baseline
  constexpr int buttonPositions[] = {25, 130, 245, 350};
  const char* labels[] = {btn1, btn2, btn3, btn4};

  for (int i = 0; i < 4; i++) {
    // Only draw if the label is non-empty
    if (labels[i] != nullptr && labels[i][0] != '\0') {
      const int x = buttonPositions[i];
      renderer.fillRect(x, pageHeight - buttonY, buttonWidth, buttonHeight, false);
      renderer.drawRect(x, pageHeight - buttonY, buttonWidth, buttonHeight);
      const int textWidth = renderer.getTextWidth(UI_10_FONT_ID, labels[i]);
      const int textX = x + (buttonWidth - 1 - textWidth) / 2;
      renderer.drawText(UI_10_FONT_ID, textX, pageHeight - buttonY + textYOffset, labels[i]);
    }
  }

  renderer.setOrientation(orig_orientation);
}

void BaseTheme::drawSideButtonHints(const GfxRenderer& renderer, const char* topBtn, const char* bottomBtn) const {
  const int screenWidth = renderer.getScreenWidth();
  constexpr int buttonWidth = BaseMetrics::values.sideButtonHintsWidth;  // Width on screen (height when rotated)
  constexpr int buttonHeight = 80;                                       // Height on screen (width when rotated)
  constexpr int buttonX = 4;                                             // Distance from right edge
  // Position for the button group - buttons share a border so they're adjacent
  constexpr int topButtonY = 345;  // Top button position

  const char* labels[] = {topBtn, bottomBtn};

  // Draw the shared border for both buttons as one unit
  const int x = screenWidth - buttonX - buttonWidth;

  // Draw top button outline (3 sides, bottom open)
  if (topBtn != nullptr && topBtn[0] != '\0') {
    renderer.drawLine(x, topButtonY, x + buttonWidth - 1, topButtonY);                                       // Top
    renderer.drawLine(x, topButtonY, x, topButtonY + buttonHeight - 1);                                      // Left
    renderer.drawLine(x + buttonWidth - 1, topButtonY, x + buttonWidth - 1, topButtonY + buttonHeight - 1);  // Right
  }

  // Draw shared middle border
  if ((topBtn != nullptr && topBtn[0] != '\0') || (bottomBtn != nullptr && bottomBtn[0] != '\0')) {
    renderer.drawLine(x, topButtonY + buttonHeight, x + buttonWidth - 1, topButtonY + buttonHeight);  // Shared border
  }

  // Draw bottom button outline (3 sides, top is shared)
  if (bottomBtn != nullptr && bottomBtn[0] != '\0') {
    renderer.drawLine(x, topButtonY + buttonHeight, x, topButtonY + 2 * buttonHeight - 1);  // Left
    renderer.drawLine(x + buttonWidth - 1, topButtonY + buttonHeight, x + buttonWidth - 1,
                      topButtonY + 2 * buttonHeight - 1);  // Right
    renderer.drawLine(x, topButtonY + 2 * buttonHeight - 1, x + buttonWidth - 1,
                      topButtonY + 2 * buttonHeight - 1);  // Bottom
  }

  // Draw text for each button
  for (int i = 0; i < 2; i++) {
    if (labels[i] != nullptr && labels[i][0] != '\0') {
      const int y = topButtonY + i * buttonHeight;

      // Draw rotated text centered in the button
      const int textWidth = renderer.getTextWidth(SMALL_FONT_ID, labels[i]);
      const int textHeight = renderer.getTextHeight(SMALL_FONT_ID);

      // Center the rotated text in the button
      const int textX = x + (buttonWidth - textHeight) / 2;
      const int textY = y + (buttonHeight + textWidth) / 2;

      renderer.drawTextRotated90CW(SMALL_FONT_ID, textX, textY, labels[i]);
    }
  }
}

void BaseTheme::drawList(const GfxRenderer& renderer, Rect rect, int itemCount, int selectedIndex,
                         const std::function<std::string(int index)>& rowTitle,
                         const std::function<std::string(int index)>& rowSubtitle,
                         const std::function<std::string(int index)>& rowIcon,
                         const std::function<std::string(int index)>& rowValue) const {
  int rowHeight =
      (rowSubtitle != nullptr) ? BaseMetrics::values.listWithSubtitleRowHeight : BaseMetrics::values.listRowHeight;
  int pageItems = rect.height / rowHeight;

  const int totalPages = (itemCount + pageItems - 1) / pageItems;
  if (totalPages > 1) {
    constexpr int indicatorWidth = 20;
    constexpr int arrowSize = 6;
    constexpr int margin = 15;  // Offset from right edge

    const int centerX = rect.x + rect.width - indicatorWidth / 2 - margin;
    const int indicatorTop = rect.y;  // Offset to avoid overlapping side button hints
    const int indicatorBottom = rect.y + rect.height - arrowSize;

    // Draw up arrow at top (^) - narrow point at top, wide base at bottom
    for (int i = 0; i < arrowSize; ++i) {
      const int lineWidth = 1 + i * 2;
      const int startX = centerX - i;
      renderer.drawLine(startX, indicatorTop + i, startX + lineWidth - 1, indicatorTop + i);
    }

    // Draw down arrow at bottom (v) - wide base at top, narrow point at bottom
    for (int i = 0; i < arrowSize; ++i) {
      const int lineWidth = 1 + (arrowSize - 1 - i) * 2;
      const int startX = centerX - (arrowSize - 1 - i);
      renderer.drawLine(startX, indicatorBottom - arrowSize + 1 + i, startX + lineWidth - 1,
                        indicatorBottom - arrowSize + 1 + i);
    }
  }

  // Draw selection
  int contentWidth = rect.width - 5;
  if (selectedIndex >= 0) {
    renderer.fillRect(0, rect.y + selectedIndex % pageItems * rowHeight - 2, rect.width, rowHeight);
  }
  // Draw all items
  const auto pageStartIndex = selectedIndex / pageItems * pageItems;
  for (int i = pageStartIndex; i < itemCount && i < pageStartIndex + pageItems; i++) {
    const int itemY = rect.y + (i % pageItems) * rowHeight;
    int textWidth = contentWidth - BaseMetrics::values.contentSidePadding * 2 - (rowValue != nullptr ? 60 : 0);

    // Draw name
    auto itemName = rowTitle(i);
    auto font = (rowSubtitle != nullptr) ? UI_12_FONT_ID : UI_10_FONT_ID;
    auto item = renderer.truncatedText(font, itemName.c_str(), textWidth);
    renderer.drawText(font, rect.x + BaseMetrics::values.contentSidePadding, itemY, item.c_str(), i != selectedIndex);

    if (rowSubtitle != nullptr) {
      // Draw subtitle
      std::string subtitleText = rowSubtitle(i);
      auto subtitle = renderer.truncatedText(UI_10_FONT_ID, subtitleText.c_str(), textWidth);
      renderer.drawText(UI_10_FONT_ID, rect.x + BaseMetrics::values.contentSidePadding, itemY + 30, subtitle.c_str(),
                        i != selectedIndex);
    }

    if (rowValue != nullptr) {
      // Draw value
      std::string valueText = rowValue(i);
      const auto valueTextWidth = renderer.getTextWidth(UI_10_FONT_ID, valueText.c_str());
      renderer.drawText(UI_10_FONT_ID, rect.x + contentWidth - BaseMetrics::values.contentSidePadding - valueTextWidth,
                        itemY, valueText.c_str(), i != selectedIndex);
    }
  }
}

void BaseTheme::drawHeader(const GfxRenderer& renderer, Rect rect, const char* title) const {
  const bool showBatteryPercentage =
      SETTINGS.hideBatteryPercentage != CrossPointSettings::HIDE_BATTERY_PERCENTAGE::HIDE_ALWAYS;
  // Position icon at right edge, drawBatteryRight will place text to the left
  const int batteryX = rect.x + rect.width - 12 - BaseMetrics::values.batteryWidth;
  drawBatteryRight(renderer,
                   Rect{batteryX, rect.y + 5, BaseMetrics::values.batteryWidth, BaseMetrics::values.batteryHeight},
                   showBatteryPercentage);

  if (title) {
    int padding = rect.width - batteryX + BaseMetrics::values.batteryWidth;
    auto truncatedTitle = renderer.truncatedText(UI_12_FONT_ID, title,
                                                 rect.width - padding * 2 - BaseMetrics::values.contentSidePadding * 2,
                                                 EpdFontFamily::BOLD);
    renderer.drawCenteredText(UI_12_FONT_ID, rect.y + 5, truncatedTitle.c_str(), true, EpdFontFamily::BOLD);
  }
}

void BaseTheme::drawTabBar(const GfxRenderer& renderer, const Rect rect, const std::vector<TabInfo>& tabs,
                           bool selected) const {
  constexpr int underlineHeight = 2;  // Height of selection underline
  constexpr int underlineGap = 4;     // Gap between text and underline

  const int lineHeight = renderer.getLineHeight(UI_12_FONT_ID);

  int currentX = rect.x + BaseMetrics::values.contentSidePadding;

  for (const auto& tab : tabs) {
    const int textWidth =
        renderer.getTextWidth(UI_12_FONT_ID, tab.label, tab.selected ? EpdFontFamily::BOLD : EpdFontFamily::REGULAR);

    // Draw underline for selected tab
    if (tab.selected) {
      if (selected) {
        renderer.fillRect(currentX - 3, rect.y, textWidth + 6, lineHeight + underlineGap);
      } else {
        renderer.fillRect(currentX, rect.y + lineHeight + underlineGap, textWidth, underlineHeight);
      }
    }

    // Draw tab label
    renderer.drawText(UI_12_FONT_ID, currentX, rect.y, tab.label, !(tab.selected && selected),
                      tab.selected ? EpdFontFamily::BOLD : EpdFontFamily::REGULAR);

    currentX += textWidth + BaseMetrics::values.tabSpacing;
  }
}

// Draw the "Recent Book" cover card on the home screen
// TODO: Refactor method to make it cleaner, split into smaller methods
void BaseTheme::drawRecentBookCover(GfxRenderer& renderer, Rect rect, const std::vector<RecentBook>& recentBooks,
                                    const int selectorIndex, bool& coverRendered, bool& coverBufferStored,
                                    bool& bufferRestored, std::function<bool()> storeCoverBuffer) const {
  // --- Top "book" card for the current title (selectorIndex == 0) ---
  const int bookWidth = rect.width / 2;
  const int bookHeight = rect.height;
  const int bookX = (rect.width - bookWidth) / 2;
  const int bookY = rect.y;
  const bool hasContinueReading = !recentBooks.empty();
  const bool bookSelected = hasContinueReading && selectorIndex == 0;

  // Bookmark dimensions (used in multiple places)
  const int bookmarkWidth = bookWidth / 8;
  const int bookmarkHeight = bookHeight / 5;
  const int bookmarkX = bookX + bookWidth - bookmarkWidth - 10;
  const int bookmarkY = bookY + 5;

  // Draw book card regardless, fill with message based on `hasContinueReading`
  {
    // Draw cover image as background if available (inside the box)
    // Only load from SD on first render, then use stored buffer

    if (hasContinueReading && !recentBooks[0].coverBmpPath.empty() && !coverRendered) {
      const std::string coverBmpPath =
          UITheme::getCoverThumbPath(recentBooks[0].coverBmpPath, BaseMetrics::values.homeCoverHeight);

      // First time: load cover from SD and render
      FsFile file;
      if (Storage.openFileForRead("HOME", coverBmpPath, file)) {
        Bitmap bitmap(file);
        if (bitmap.parseHeaders() == BmpReaderError::Ok) {
          LOG_DBG("THEME", "Rendering bmp");
          // Calculate position to center image within the book card
          int coverX, coverY;

          if (bitmap.getWidth() > bookWidth || bitmap.getHeight() > bookHeight) {
            const float imgRatio = static_cast<float>(bitmap.getWidth()) / static_cast<float>(bitmap.getHeight());
            const float boxRatio = static_cast<float>(bookWidth) / static_cast<float>(bookHeight);

            if (imgRatio > boxRatio) {
              coverX = bookX;
              coverY = bookY + (bookHeight - static_cast<int>(bookWidth / imgRatio)) / 2;
            } else {
              coverX = bookX + (bookWidth - static_cast<int>(bookHeight * imgRatio)) / 2;
              coverY = bookY;
            }
          } else {
            coverX = bookX + (bookWidth - bitmap.getWidth()) / 2;
            coverY = bookY + (bookHeight - bitmap.getHeight()) / 2;
          }

          // Draw the cover image centered within the book card
          renderer.drawBitmap(bitmap, coverX, coverY, bookWidth, bookHeight);

          // Draw border around the card
          renderer.drawRect(bookX, bookY, bookWidth, bookHeight);

          // No bookmark ribbon when cover is shown - it would just cover the art

          // Store the buffer with cover image for fast navigation
          coverBufferStored = storeCoverBuffer();
          coverRendered = true;

          // First render: if selected, draw selection indicators now
          if (bookSelected) {
            LOG_DBG("THEME", "Drawing selection");
            renderer.drawRect(bookX + 1, bookY + 1, bookWidth - 2, bookHeight - 2);
            renderer.drawRect(bookX + 2, bookY + 2, bookWidth - 4, bookHeight - 4);
          }
        }
        file.close();
      }
    }

    if (!bufferRestored && !coverRendered) {
      // No cover image: draw border or fill, plus bookmark as visual flair
      if (bookSelected) {
        renderer.fillRect(bookX, bookY, bookWidth, bookHeight);
      } else {
        renderer.drawRect(bookX, bookY, bookWidth, bookHeight);
      }

      // Draw bookmark ribbon when no cover image (visual decoration)
      if (hasContinueReading) {
        const int notchDepth = bookmarkHeight / 3;
        const int centerX = bookmarkX + bookmarkWidth / 2;

        const int xPoints[5] = {
            bookmarkX,                  // top-left
            bookmarkX + bookmarkWidth,  // top-right
            bookmarkX + bookmarkWidth,  // bottom-right
            centerX,                    // center notch point
            bookmarkX                   // bottom-left
        };
        const int yPoints[5] = {
            bookmarkY,                                // top-left
            bookmarkY,                                // top-right
            bookmarkY + bookmarkHeight,               // bottom-right
            bookmarkY + bookmarkHeight - notchDepth,  // center notch point
            bookmarkY + bookmarkHeight                // bottom-left
        };

        // Draw bookmark ribbon (inverted if selected)
        renderer.fillPolygon(xPoints, yPoints, 5, !bookSelected);
      }
    }

    // If buffer was restored, draw selection indicators if needed
    if (bufferRestored && bookSelected && coverRendered) {
      // Draw selection border (no bookmark inversion needed since cover has no bookmark)
      renderer.drawRect(bookX + 1, bookY + 1, bookWidth - 2, bookHeight - 2);
      renderer.drawRect(bookX + 2, bookY + 2, bookWidth - 4, bookHeight - 4);
    } else if (!coverRendered && !bufferRestored) {
      // Selection border already handled above in the no-cover case
    }
  }

  if (hasContinueReading) {
    const std::string& lastBookTitle = recentBooks[0].title;
    const std::string& lastBookAuthor = recentBooks[0].author;

    // Invert text colors based on selection state:
    // - With cover: selected = white text on black box, unselected = black text on white box
    // - Without cover: selected = white text on black card, unselected = black text on white card

    // Split into words (avoid stringstream to keep this light on the MCU)
    std::vector<std::string> words;
    words.reserve(8);
    size_t pos = 0;
    while (pos < lastBookTitle.size()) {
      while (pos < lastBookTitle.size() && lastBookTitle[pos] == ' ') {
        ++pos;
      }
      if (pos >= lastBookTitle.size()) {
        break;
      }
      const size_t start = pos;
      while (pos < lastBookTitle.size() && lastBookTitle[pos] != ' ') {
        ++pos;
      }
      words.emplace_back(lastBookTitle.substr(start, pos - start));
    }

    std::vector<std::string> lines;
    std::string currentLine;
    // Extra padding inside the card so text doesn't hug the border
    const int maxLineWidth = bookWidth - 40;
    const int spaceWidth = renderer.getSpaceWidth(UI_12_FONT_ID);

    for (auto& i : words) {
      // If we just hit the line limit (3), stop processing words
      if (lines.size() >= 3) {
        // Limit to 3 lines
        // Still have words left, so add ellipsis to last line
        lines.back().append("...");

        while (!lines.back().empty() && renderer.getTextWidth(UI_12_FONT_ID, lines.back().c_str()) > maxLineWidth) {
          // Remove "..." first, then remove one UTF-8 char, then add "..." back
          lines.back().resize(lines.back().size() - 3);  // Remove "..."
          utf8RemoveLastChar(lines.back());
          lines.back().append("...");
        }
        break;
      }

      int wordWidth = renderer.getTextWidth(UI_12_FONT_ID, i.c_str());
      while (wordWidth > maxLineWidth && !i.empty()) {
        // Word itself is too long, trim it (UTF-8 safe)
        utf8RemoveLastChar(i);
        // Check if we have room for ellipsis
        std::string withEllipsis = i + "...";
        wordWidth = renderer.getTextWidth(UI_12_FONT_ID, withEllipsis.c_str());
        if (wordWidth <= maxLineWidth) {
          i = withEllipsis;
          break;
        }
      }

      int newLineWidth = renderer.getTextWidth(UI_12_FONT_ID, currentLine.c_str());
      if (newLineWidth > 0) {
        newLineWidth += spaceWidth;
      }
      newLineWidth += wordWidth;

      if (newLineWidth > maxLineWidth && !currentLine.empty()) {
        // New line too long, push old line
        lines.push_back(currentLine);
        currentLine = i;
      } else {
        currentLine.append(" ").append(i);
      }
    }

    // If lower than the line limit, push remaining words
    if (!currentLine.empty() && lines.size() < 3) {
      lines.push_back(currentLine);
    }

    // Book title text
    int totalTextHeight = renderer.getLineHeight(UI_12_FONT_ID) * static_cast<int>(lines.size());
    if (!lastBookAuthor.empty()) {
      totalTextHeight += renderer.getLineHeight(UI_10_FONT_ID) * 3 / 2;
    }

    // Vertically center the title block within the card
    int titleYStart = bookY + (bookHeight - totalTextHeight) / 2;

    // If cover image was rendered, draw box behind title and author
    if (coverRendered) {
      constexpr int boxPadding = 8;
      // Calculate the max text width for the box
      int maxTextWidth = 0;
      for (const auto& line : lines) {
        const int lineWidth = renderer.getTextWidth(UI_12_FONT_ID, line.c_str());
        if (lineWidth > maxTextWidth) {
          maxTextWidth = lineWidth;
        }
      }
      if (!lastBookAuthor.empty()) {
        std::string trimmedAuthor = lastBookAuthor;
        while (renderer.getTextWidth(UI_10_FONT_ID, trimmedAuthor.c_str()) > maxLineWidth && !trimmedAuthor.empty()) {
          utf8RemoveLastChar(trimmedAuthor);
        }
        if (renderer.getTextWidth(UI_10_FONT_ID, trimmedAuthor.c_str()) <
            renderer.getTextWidth(UI_10_FONT_ID, lastBookAuthor.c_str())) {
          trimmedAuthor.append("...");
        }
        const int authorWidth = renderer.getTextWidth(UI_10_FONT_ID, trimmedAuthor.c_str());
        if (authorWidth > maxTextWidth) {
          maxTextWidth = authorWidth;
        }
      }

      const int boxWidth = maxTextWidth + boxPadding * 2;
      const int boxHeight = totalTextHeight + boxPadding * 2;
      const int boxX = (rect.width - boxWidth) / 2;
      const int boxY = titleYStart - boxPadding;

      // Draw box (inverted when selected: black box instead of white)
      renderer.fillRect(boxX, boxY, boxWidth, boxHeight, bookSelected);
      // Draw border around the box (inverted when selected: white border instead of black)
      renderer.drawRect(boxX, boxY, boxWidth, boxHeight, !bookSelected);
    }

    for (const auto& line : lines) {
      renderer.drawCenteredText(UI_12_FONT_ID, titleYStart, line.c_str(), !bookSelected);
      titleYStart += renderer.getLineHeight(UI_12_FONT_ID);
    }

    if (!lastBookAuthor.empty()) {
      titleYStart += renderer.getLineHeight(UI_10_FONT_ID) / 2;
      std::string trimmedAuthor = lastBookAuthor;
      // Trim author if too long (UTF-8 safe)
      bool wasTrimmed = false;
      while (renderer.getTextWidth(UI_10_FONT_ID, trimmedAuthor.c_str()) > maxLineWidth && !trimmedAuthor.empty()) {
        utf8RemoveLastChar(trimmedAuthor);
        wasTrimmed = true;
      }
      if (wasTrimmed && !trimmedAuthor.empty()) {
        // Make room for ellipsis
        while (renderer.getTextWidth(UI_10_FONT_ID, (trimmedAuthor + "...").c_str()) > maxLineWidth &&
               !trimmedAuthor.empty()) {
          utf8RemoveLastChar(trimmedAuthor);
        }
        trimmedAuthor.append("...");
      }
      renderer.drawCenteredText(UI_10_FONT_ID, titleYStart, trimmedAuthor.c_str(), !bookSelected);
    }

    // "Continue Reading" label at the bottom
    const int continueY = bookY + bookHeight - renderer.getLineHeight(UI_10_FONT_ID) * 3 / 2;
    if (coverRendered) {
      // Draw box behind "Continue Reading" text (inverted when selected: black box instead of white)
      const char* continueText = tr(STR_CONTINUE_READING);
      const int continueTextWidth = renderer.getTextWidth(UI_10_FONT_ID, continueText);
      constexpr int continuePadding = 6;
      const int continueBoxWidth = continueTextWidth + continuePadding * 2;
      const int continueBoxHeight = renderer.getLineHeight(UI_10_FONT_ID) + continuePadding;
      const int continueBoxX = (rect.width - continueBoxWidth) / 2;
      const int continueBoxY = continueY - continuePadding / 2;
      renderer.fillRect(continueBoxX, continueBoxY, continueBoxWidth, continueBoxHeight, bookSelected);
      renderer.drawRect(continueBoxX, continueBoxY, continueBoxWidth, continueBoxHeight, !bookSelected);
      renderer.drawCenteredText(UI_10_FONT_ID, continueY, continueText, !bookSelected);
    } else {
      renderer.drawCenteredText(UI_10_FONT_ID, continueY, tr(STR_CONTINUE_READING), !bookSelected);
    }
  } else {
    // No book to continue reading
    const int y =
        bookY + (bookHeight - renderer.getLineHeight(UI_12_FONT_ID) - renderer.getLineHeight(UI_10_FONT_ID)) / 2;
    renderer.drawCenteredText(UI_12_FONT_ID, y, "No open book");
    renderer.drawCenteredText(UI_10_FONT_ID, y + renderer.getLineHeight(UI_12_FONT_ID), "Start reading below");
  }
}

void BaseTheme::drawButtonMenu(GfxRenderer& renderer, Rect rect, int buttonCount, int selectedIndex,
                               const std::function<std::string(int index)>& buttonLabel,
                               const std::function<std::string(int index)>& rowIcon) const {
  for (int i = 0; i < buttonCount; ++i) {
    const int tileY = BaseMetrics::values.verticalSpacing + rect.y +
                      static_cast<int>(i) * (BaseMetrics::values.menuRowHeight + BaseMetrics::values.menuSpacing);

    const bool selected = selectedIndex == i;

    if (selected) {
      renderer.fillRect(rect.x + BaseMetrics::values.contentSidePadding, tileY,
                        rect.width - BaseMetrics::values.contentSidePadding * 2, BaseMetrics::values.menuRowHeight);
    } else {
      renderer.drawRect(rect.x + BaseMetrics::values.contentSidePadding, tileY,
                        rect.width - BaseMetrics::values.contentSidePadding * 2, BaseMetrics::values.menuRowHeight);
    }

    std::string labelStr = buttonLabel(i);
    const char* label = labelStr.c_str();
    const int textWidth = renderer.getTextWidth(UI_10_FONT_ID, label);
    const int textX = rect.x + (rect.width - textWidth) / 2;
    const int lineHeight = renderer.getLineHeight(UI_10_FONT_ID);
    const int textY =
        tileY + (BaseMetrics::values.menuRowHeight - lineHeight) / 2;  // vertically centered assuming y is top of text
    // Invert text when the tile is selected, to contrast with the filled background
    renderer.drawText(UI_10_FONT_ID, textX, textY, label, selectedIndex != i);
  }
}

Rect BaseTheme::drawPopup(const GfxRenderer& renderer, const char* message) const {
  constexpr int margin = 15;
  constexpr int y = 60;
  const int textWidth = renderer.getTextWidth(UI_12_FONT_ID, message, EpdFontFamily::BOLD);
  const int textHeight = renderer.getLineHeight(UI_12_FONT_ID);
  const int w = textWidth + margin * 2;
  const int h = textHeight + margin * 2;
  const int x = (renderer.getScreenWidth() - w) / 2;

  renderer.fillRect(x - 2, y - 2, w + 4, h + 4, true);  // frame thickness 2
  renderer.fillRect(x, y, w, h, false);

  const int textX = x + (w - textWidth) / 2;
  const int textY = y + margin - 2;
  renderer.drawText(UI_12_FONT_ID, textX, textY, message, true, EpdFontFamily::BOLD);
  renderer.displayBuffer();
  return Rect{x, y, w, h};
}

void BaseTheme::fillPopupProgress(const GfxRenderer& renderer, const Rect& layout, const int progress) const {
  constexpr int barHeight = 4;
  const int barWidth = layout.width - 30;  // twice the margin in drawPopup to match text width
  const int barX = layout.x + (layout.width - barWidth) / 2;
  const int barY = layout.y + layout.height - 10;

  int fillWidth = barWidth * progress / 100;

  renderer.fillRect(barX, barY, fillWidth, barHeight, true);

  renderer.displayBuffer(HalDisplay::FAST_REFRESH);
}

void BaseTheme::drawReadingProgressBar(const GfxRenderer& renderer, const size_t bookProgress) const {
  int vieweableMarginTop, vieweableMarginRight, vieweableMarginBottom, vieweableMarginLeft;
  renderer.getOrientedViewableTRBL(&vieweableMarginTop, &vieweableMarginRight, &vieweableMarginBottom,
                                   &vieweableMarginLeft);

  const int progressBarMaxWidth = renderer.getScreenWidth() - vieweableMarginLeft - vieweableMarginRight;
  const int progressBarY =
      renderer.getScreenHeight() - vieweableMarginBottom - BaseMetrics::values.bookProgressBarHeight;
  const int barWidth = progressBarMaxWidth * bookProgress / 100;
  renderer.fillRect(vieweableMarginLeft, progressBarY, barWidth, BaseMetrics::values.bookProgressBarHeight, true);
}