#!/bin/bash
#
# Script Name: configure_project_settings.sh
# Description: Configure all Unreal Engine project settings (Nanite, Lumen, World Partition, Plugins)
# Usage: ./configure_project_settings.sh
# Author: Dubai Metaverse Team
# Date: 2025-11-21
# Version: 1.0

set -euo pipefail

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

# Configuration
PROJECT_DIR="${PROJECT_DIR:-$(pwd)}"
PROJECT_FILE="$PROJECT_DIR/DubaiMetaverse.uproject"
ENGINE_INI="$PROJECT_DIR/Config/DefaultEngine.ini"
GAME_INI="$PROJECT_DIR/Config/DefaultGame.ini"
LOG_FILE="$PROJECT_DIR/logs/configure_project_settings.log"

# Create log directory
mkdir -p "$(dirname "$LOG_FILE")"

log() {
    local level="${1:-INFO}"
    shift
    local message="$*"
    local timestamp=$(date +'%Y-%m-%d %H:%M:%S')
    echo "[$timestamp] [$level] $message" | tee -a "$LOG_FILE"
    echo -e "${message}"
}

echo "=========================================="
echo "Dubai Metaverse Project Settings Configuration"
echo "=========================================="
echo ""

cd "$PROJECT_DIR"

# Check project file exists
if [ ! -f "$PROJECT_FILE" ]; then
    echo -e "${RED}✗${NC} Project file not found: $PROJECT_FILE"
    echo "   Run: ./scripts/setup/create_ue5_project.sh first"
    exit 1
fi
echo -e "${GREEN}✓${NC} Project file found: $PROJECT_FILE"

# Backup existing config files
if [ -f "$ENGINE_INI" ]; then
    cp "$ENGINE_INI" "$ENGINE_INI.backup.$(date +%Y%m%d_%H%M%S)"
    echo -e "${BLUE}ℹ${NC} Backed up DefaultEngine.ini"
fi

if [ -f "$GAME_INI" ]; then
    cp "$GAME_INI" "$GAME_INI.backup.$(date +%Y%m%d_%H%M%S)"
    echo -e "${BLUE}ℹ${NC} Backed up DefaultGame.ini"
fi

# Create Config directory if it doesn't exist
mkdir -p "$PROJECT_DIR/Config"

echo ""
echo "=========================================="
echo "Configuring DefaultEngine.ini"
echo "=========================================="
echo ""

# Create comprehensive DefaultEngine.ini
cat > "$ENGINE_INI" << 'EOF'
; Dubai Metaverse - DefaultEngine.ini
; Configured automatically by configure_project_settings.sh
; Last Updated: 2025-11-21

[/Script/Engine.RendererSettings]
; ============================================
; NANITE SETTINGS
; ============================================
r.Nanite.ProjectEnabled=True

; ============================================
; LUMEN SETTINGS
; ============================================
r.DefaultFeature.LumenSupport=1
r.Lumen.ProjectEnabled=True
r.Lumen.DiffuseIndirect.Allow=1
r.Lumen.Reflections.Allow=1
r.Lumen.ScreenProbeGather.ScreenSpaceBentNormal=1
r.Lumen.ScreenProbeGather.TraceMeshSDFs=1
r.Lumen.ScreenProbeGather.ScreenTraces=1

; ============================================
; VIRTUAL SHADOW MAPS
; ============================================
r.Shadow.Virtual.Enable=1
r.Shadow.Virtual.OnePassProjection=1

; ============================================
; ANTI-ALIASING
; ============================================
r.DefaultFeature.AntiAliasing=2
r.TemporalAA.Quality=4
r.TemporalAA.Upsampling=1

; ============================================
; POST-PROCESS EFFECTS
; ============================================
r.DefaultFeature.AutoExposure=False
r.DefaultFeature.Bloom=True
r.DefaultFeature.MotionBlur=True
r.MotionBlurQuality=4
r.BloomQuality=4

; ============================================
; RENDERING PERFORMANCE
; ============================================
r.VirtualTextures=True
r.VirtualTextures.EnableAutoImport=True
r.VirtualTextures.Enable=1

[/Script/Engine.WorldSettings]
; ============================================
; WORLD PARTITION
; ============================================
bEnableWorldPartition=True

[/Script/Engine.Engine]
; ============================================
; PROJECT SETTINGS
; ============================================
+ActiveGameNameRedirects=(OldGameName="TP_Blank",NewGameName="/Script/DubaiMetaverse")
+ActiveGameNameRedirects=(OldGameName="/Script/TP_Blank",NewGameName="/Script/DubaiMetaverse")
+ActiveClassRedirects=(OldClassName="TP_BlankGameModeBase",NewClassName="DubaiMetaverseGameModeBase")

[/Script/EngineSettings.GameMapsSettings]
; ============================================
; DEFAULT MAPS
; ============================================
GameDefaultMap=/Game/Maps/MainLevel
EditorStartupMap=/Game/Maps/MainLevel

[/Script/WindowsTargetPlatform.WindowsTargetSettings]
; ============================================
; WINDOWS PLATFORM SETTINGS
; ============================================
DefaultGraphicsRHI=Default
+TargetedRHIs=PCD3D_SM6
+TargetedRHIs=PCD3D_SM5

[/Script/LinuxTargetPlatform.LinuxTargetSettings]
; ============================================
; LINUX PLATFORM SETTINGS
; ============================================
DefaultGraphicsRHI=Default

EOF

echo -e "${GREEN}✓${NC} DefaultEngine.ini configured with:"
echo "  - Nanite enabled"
echo "  - Lumen enabled (GI + Reflections)"
echo "  - Virtual Shadow Maps enabled"
echo "  - World Partition enabled"
echo "  - Post-process effects configured"

echo ""
echo "=========================================="
echo "Configuring DefaultGame.ini"
echo "=========================================="
echo ""

# Create DefaultGame.ini
cat > "$GAME_INI" << 'EOF'
; Dubai Metaverse - DefaultGame.ini
; Configured automatically by configure_project_settings.sh
; Last Updated: 2025-11-21

[/Script/EngineSettings.GameMapsSettings]
; ============================================
; DEFAULT MAPS
; ============================================
GameDefaultMap=/Game/Maps/Main/MainLevel
EditorStartupMap=/Game/Maps/Main/MainLevel
GlobalDefaultGameMode=/Script/Engine.GameModeBase

[/Script/Engine.GameEngine]
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemUtils.IpNetDriver",DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver")

[/Script/OnlineSubsystem.IpNetDriver]
NetDriverClassName="OnlineSubsystemUtils.IpNetDriver"

EOF

echo -e "${GREEN}✓${NC} DefaultGame.ini configured"

echo ""
echo "=========================================="
echo "Verifying Plugins in Project File"
echo "=========================================="
echo ""

# Check and configure plugins in project file
REQUIRED_PLUGINS=(
    "ProceduralContentGeneration"
    "VirtualProduction"
    "MovieRenderQueue"
    "ModelingTools"
    "GeometryScript"
)

PLUGINS_MISSING=0

for plugin in "${REQUIRED_PLUGINS[@]}"; do
    if grep -q "\"Name\": \"$plugin\"" "$PROJECT_FILE"; then
        if grep -A1 "\"Name\": \"$plugin\"" "$PROJECT_FILE" | grep -q "\"Enabled\": true"; then
            echo -e "${GREEN}✓${NC} Plugin enabled: $plugin"
        else
            echo -e "${YELLOW}⚠${NC} Plugin found but not enabled: $plugin"
            PLUGINS_MISSING=1
        fi
    else
        echo -e "${RED}✗${NC} Plugin missing: $plugin"
        PLUGINS_MISSING=1
    fi
done

if [ $PLUGINS_MISSING -eq 1 ]; then
    echo ""
    echo -e "${YELLOW}⚠${NC} Some plugins need to be enabled manually:"
    echo "   1. Launch Unreal Editor"
    echo "   2. Go to Edit > Plugins"
    echo "   3. Enable the missing plugins listed above"
    echo "   4. Restart editor"
else
    echo ""
    echo -e "${GREEN}✓${NC} All required plugins are enabled"
fi

echo ""
echo "=========================================="
echo "Configuration Summary"
echo "=========================================="
echo ""

# Verify settings
echo "Verifying configuration..."

NANITE_OK=0
LUMEN_OK=0
WORLDPARTITION_OK=0

if grep -q "r.Nanite.ProjectEnabled=True" "$ENGINE_INI"; then
    echo -e "${GREEN}✓${NC} Nanite: Enabled"
    NANITE_OK=1
else
    echo -e "${RED}✗${NC} Nanite: Not configured"
fi

if grep -q "r.Lumen.ProjectEnabled=True" "$ENGINE_INI"; then
    echo -e "${GREEN}✓${NC} Lumen: Enabled"
    LUMEN_OK=1
else
    echo -e "${RED}✗${NC} Lumen: Not configured"
fi

if grep -q "bEnableWorldPartition=True" "$ENGINE_INI"; then
    echo -e "${GREEN}✓${NC} World Partition: Enabled"
    WORLDPARTITION_OK=1
else
    echo -e "${RED}✗${NC} World Partition: Not configured"
fi

echo ""
echo "=========================================="
echo "Next Steps"
echo "=========================================="
echo ""

if [ $NANITE_OK -eq 1 ] && [ $LUMEN_OK -eq 1 ] && [ $WORLDPARTITION_OK -eq 1 ]; then
    echo -e "${GREEN}✅ All project settings configured successfully!${NC}"
    echo ""
    echo "Next steps:"
    echo "1. Launch Unreal Editor:"
    echo "   ~/UnrealEngine/Engine/Binaries/Linux/UnrealEditor \\"
    echo "     ~/projects/metaverseDubai/DubaiMetaverse.uproject"
    echo ""
    echo "2. Verify settings in editor:"
    echo "   - Edit > Project Settings > Engine > Rendering"
    echo "     - Verify Nanite is enabled"
    echo "     - Verify Lumen (Global Illumination and Reflections) is enabled"
    echo "   - World Settings > Enable World Partition"
    echo ""
    echo "3. Verify plugins:"
    echo "   - Edit > Plugins"
    echo "     - Verify all required plugins are enabled"
    echo ""
    log "INFO" "Configuration complete - All settings verified"
    exit 0
else
    echo -e "${RED}⚠${NC} Some settings may not be configured correctly"
    echo "   Please review the configuration files manually"
    log "WARNING" "Configuration incomplete - Some settings missing"
    exit 1
fi