#!/bin/bash

echo "========================================"
echo "Text Rendering Diagnostic Script"
echo "========================================"
echo ""

# Check if FreeType is installed
echo "1. Checking FreeType installation..."
if pkg-config --exists freetype2; then
    echo "   ✓ FreeType found:"
    pkg-config --modversion freetype2
    echo "   Library: $(pkg-config --variable=libdir freetype2)/libfreetype.a"
    echo "   Include: $(pkg-config --cflags freetype2)"
else
    echo "   ✗ FreeType not found via pkg-config"
fi
echo ""

# Check for font files
echo "2. Checking available fonts..."
FONTS=(
    "/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf"
    "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf"
    "/usr/share/fonts/TTF/DejaVuSans.ttf"
    "/usr/local/share/fonts/DejaVuSans.ttf"
)

FOUND_FONT=false
for font in "${FONTS[@]}"; do
    if [ -f "$font" ]; then
        echo "   ✓ Found: $font"
        FOUND_FONT=true
    fi
done

if [ "$FOUND_FONT" = false ]; then
    echo "   ✗ No fonts found in standard locations"
    echo "   Installing DejaVu fonts might help:"
    echo "   sudo apt-get install fonts-dejavu-core"
fi
echo ""

# Check if shaders are compiled
echo "3. Checking text shaders..."
if [ -f "src/shaders_spirv/text.vert.spv" ]; then
    echo "   ✓ text.vert.spv exists"
else
    echo "   ✗ text.vert.spv missing"
fi

if [ -f "src/shaders_spirv/text.frag.spv" ]; then
    echo "   ✓ text.frag.spv exists"
else
    echo "   ✗ text.frag.spv missing"
fi

if [ -f "src/shaders_spirv/text_vert.inc" ]; then
    echo "   ✓ text_vert.inc exists"
else
    echo "   ✗ text_vert.inc missing"
fi

if [ -f "src/shaders_spirv/text_frag.inc" ]; then
    echo "   ✓ text_frag.inc exists"
else
    echo "   ✗ text_frag.inc missing"
fi
echo ""

# Check build configuration
echo "4. Checking build configuration..."
if [ -f "build/CMakeCache.txt" ]; then
    if grep -q "ENABLE_FREETYPE" build/CMakeCache.txt 2>/dev/null; then
        echo "   ✓ ENABLE_FREETYPE is defined"
    else
        echo "   ✗ ENABLE_FREETYPE not found in build"
    fi

    if grep -q "FREETYPE_LIBRARY" build/CMakeCache.txt 2>/dev/null; then
        FREETYPE_LIB=$(grep "FREETYPE_LIBRARY" build/CMakeCache.txt | cut -d= -f2)
        echo "   ✓ FreeType library linked: $FREETYPE_LIB"
    fi
else
    echo "   ⚠ Build directory not found - run ./build.sh first"
fi
echo ""

# Check if executable exists and has FreeType symbols
echo "5. Checking executable..."
if [ -f "build/bin/ScreenLockDetector" ]; then
    echo "   ✓ Executable exists"

    # Check for FreeType symbols
    if nm build/bin/ScreenLockDetector 2>/dev/null | grep -q "FT_Init_FreeType"; then
        echo "   ✓ FreeType symbols found in executable"
    else
        echo "   ⚠ FreeType symbols not found (might be dynamically linked)"
    fi

    # Check for Vulkan symbols
    if nm build/bin/ScreenLockDetector 2>/dev/null | grep -q "vkCreateGraphicsPipeline"; then
        echo "   ✓ Vulkan symbols found"
    fi
else
    echo "   ✗ Executable not found - build first with ./build.sh"
fi
echo ""

# Run the application with text rendering debug output
echo "6. Testing text rendering (5 seconds)..."
echo "   Starting application..."
if [ -f "build/bin/ScreenLockDetector" ]; then
    timeout 5 ./run.sh 2>&1 | grep -E "Text|text|Font|font|FreeType|pipeline|charMap|Drawing text" | head -20
    echo ""
    echo "   If you see 'Drawing text with X vertices' above, text rendering is working!"
else
    echo "   ✗ Cannot test - executable not found"
fi
echo ""

# Summary
echo "========================================"
echo "Summary"
echo "========================================"
echo ""
echo "Text rendering requires:"
echo "  1. FreeType library installed ✓"
echo "  2. At least one font file available"
echo "  3. Text shaders compiled (text.vert/frag.spv)"
echo "  4. ENABLE_FREETYPE defined in build"
echo "  5. Application successfully initializes text pipeline"
echo ""
echo "If text is not visible but pipeline is created:"
echo "  - Check shader coordinate system"
echo "  - Verify alpha blending is enabled"
echo "  - Ensure text color contrasts with background"
echo "  - Check if text is positioned within viewport"
echo ""
echo "For more details, see: TEXT_RENDERING.md"
echo "========================================"