#!/bin/bash
cd /var/www/html || exit 1

# First, let's clear the F-Droid index
rm -f repo/index*
rm -f repo/entry.jar

# Make sure we have the tools we need
command -v aapt >/dev/null 2>&1 || { echo "Error: aapt is required but not installed. Please install Android SDK build tools."; exit 1; }
command -v jq >/dev/null 2>&1 || { echo "Error: jq is required but not installed. Please install jq for JSON parsing."; exit 1; }

# Configuration
GITEA_URL="https://git.felo.gg"
REPO_OWNER="FeloStore"
REPO_NAME="Data"
RELEASE_TAG="latest"

# Function to extract version from APK
get_version() {
    apk_file=$1
    version=$(aapt dump badging "$apk_file" 2>/dev/null | grep versionName | awk -F"'" '{print $4}')
    echo "$version"
}

# Function to download and update only if changed
update_app() {
    app_name=$1
    app_url=$2
    
    echo "Processing $app_name..."
    
    # Create temp directory
    mkdir -p ./temp
    
    # Download to temp file
    wget -q -O "./temp/${app_name}.apk.new" "$app_url"
    
    # Check if download was successful
    if [ ! -f "./temp/${app_name}.apk.new" ] || [ ! -s "./temp/${app_name}.apk.new" ]; then
        echo "  ✗ $app_name: Download failed, skipping..."
        rm -f "./temp/${app_name}.apk.new"
        return
    fi
    
    # Extract version info from the new APK
    new_version=$(get_version "./temp/${app_name}.apk.new")
    echo "  Downloaded version: $new_version"
    
    # Check if app exists and if it's different
    if [ -f "./repo/${app_name}.apk" ]; then
        # Extract version info from the existing APK
        current_version=$(get_version "./repo/${app_name}.apk")
        echo "  Current version: $current_version"
        
        # Compare files (binary comparison to be absolutely sure)
        if ! cmp -s "./temp/${app_name}.apk.new" "./repo/${app_name}.apk"; then
            echo "  ✓ $app_name: New version detected ($current_version → $new_version), updating..."
            mv "./temp/${app_name}.apk.new" "./repo/${app_name}.apk"
            touch -d "$(date +%Y-%m-%d)" "./repo/${app_name}.apk"
        else
            echo "  ✓ $app_name: No changes detected (version $current_version), keeping existing version"
            rm "./temp/${app_name}.apk.new"
        fi
    else
        echo "  ✓ $app_name: File does not exist yet, adding version $new_version..."
        mv "./temp/${app_name}.apk.new" "./repo/${app_name}.apk"
        touch -d "$(date +%Y-%m-%d)" "./repo/${app_name}.apk"
    fi
}

# Function to get app name from filename
get_app_name() {
    filename=$1
    # Remove .apk extension and convert to proper case
    app_name=$(basename "$filename" .apk)
    # Convert first letter to uppercase
    app_name=$(echo "$app_name" | sed 's/^\(.\)/\U\1/')
    echo "$app_name"
}

echo "Fetching release information from Gitea..."

# Get release information from Gitea API
RELEASE_API_URL="${GITEA_URL}/api/v1/repos/${REPO_OWNER}/${REPO_NAME}/releases/tags/${RELEASE_TAG}"
release_info=$(wget -q -O - "$RELEASE_API_URL")

if [ -z "$release_info" ]; then
    echo "Error: Could not fetch release information from Gitea API"
    exit 1
fi

# Extract APK download URLs from the release
apk_urls=$(echo "$release_info" | jq -r '.assets[] | select(.name | endswith(".apk")) | .browser_download_url')

if [ -z "$apk_urls" ]; then
    echo "Error: No APK files found in the latest release"
    exit 1
fi

echo "Found APK files in release:"
echo "$apk_urls" | while read -r url; do
    filename=$(basename "$url")
    echo "  - $filename"
done

# Process each APK
echo "$apk_urls" | while read -r url; do
    if [ -n "$url" ]; then
        filename=$(basename "$url")
        app_name=$(get_app_name "$filename")
        update_app "$app_name" "$url"
    fi
done

# Clean up temp directory
rm -rf ./temp

echo "Updating F-Droid repository..."
/root/.local/bin/fdroid update -c --allow-disabled-algorithms

echo "Done! Repository updated with all available apps."