#!/bin/bash
set -e

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Configuration paths
INFO_PLIST="Gaze/Info.plist"
ENTITLEMENTS="Gaze/Gaze.entitlements"
PROJECT_FILE="Gaze.xcodeproj/project.pbxproj"
PACKAGE_RESOLVED="Gaze.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved"
BACKUP_DIR=".distribution_configs"

# Distribution configurations
APPSTORE_CONFIG="${BACKUP_DIR}/appstore"
SELF_CONFIG="${BACKUP_DIR}/self"

# Sparkle package details
SPARKLE_REPO="https://github.com/sparkle-project/Sparkle"
SPARKLE_VERSION="2.8.1"

# Function to print colored messages
print_info() {
    echo -e "${BLUE}ℹ${NC} $1"
}

print_success() {
    echo -e "${GREEN}✓${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}⚠${NC} $1"
}

print_error() {
    echo -e "${RED}✗${NC} $1"
}

# Function to check if Sparkle is in Package.resolved
has_sparkle_package() {
    if [ -f "${PACKAGE_RESOLVED}" ]; then
        grep -q "Sparkle" "${PACKAGE_RESOLVED}"
        return $?
    fi
    return 1
}

# Function to remove Sparkle from Xcode project
remove_sparkle_package() {
    print_info "Removing Sparkle package dependency..."
    
    # Check if Sparkle exists in the project
    if ! has_sparkle_package && ! grep -q "Sparkle" "${PROJECT_FILE}"; then
        print_info "Sparkle already removed"
        return 0
    fi
    
    # Backup project file
    cp "${PROJECT_FILE}" "${PROJECT_FILE}.backup"
    
    # Remove Sparkle from Package.resolved
    if [ -f "${PACKAGE_RESOLVED}" ]; then
        # Create a temp file without Sparkle entry
        python3 -c "
import json
import sys

try:
    with open('${PACKAGE_RESOLVED}', 'r') as f:
        data = json.load(f)
    
    # Filter out Sparkle from pins
    if 'pins' in data:
        data['pins'] = [pin for pin in data['pins'] if 'sparkle' not in pin.get('identity', '').lower()]
    
    with open('${PACKAGE_RESOLVED}', 'w') as f:
        json.dump(data, f, indent=2)
    
    print('✓ Updated Package.resolved')
except Exception as e:
    print(f'Error: {e}', file=sys.stderr)
    sys.exit(1)
"
        if [ $? -ne 0 ]; then
            print_error "Failed to update Package.resolved"
            mv "${PROJECT_FILE}.backup" "${PROJECT_FILE}"
            return 1
        fi
    fi
    
    # Remove Sparkle references from project.pbxproj
    # This removes: package references, product dependencies, and framework build files
    
    # Remove XCRemoteSwiftPackageReference for Sparkle
    sed -i '' '/XCRemoteSwiftPackageReference "Sparkle"/,/};/d' "${PROJECT_FILE}"
    
    # Remove XCSwiftPackageProductDependency for Sparkle
    sed -i '' '/XCSwiftPackageProductDependency "Sparkle"/,/};/d' "${PROJECT_FILE}"
    
    # Remove Sparkle from packageProductDependencies array
    sed -i '' '/\/\* Sparkle \*\/,/d' "${PROJECT_FILE}"
    
    # Remove Sparkle from Frameworks build phase
    sed -i '' '/Sparkle in Frameworks/d' "${PROJECT_FILE}"
    
    # Clean up empty lines
    sed -i '' '/^[[:space:]]*$/d' "${PROJECT_FILE}"
    
    rm -f "${PROJECT_FILE}.backup"
    
    print_success "Removed Sparkle package dependency"
    print_info "Xcode will resolve packages on next build"
}

# Function to add Sparkle to Xcode project
add_sparkle_package() {
    print_info "Adding Sparkle package dependency..."
    
    # Check if Sparkle already exists
    if has_sparkle_package || grep -q "Sparkle" "${PROJECT_FILE}"; then
        print_info "Sparkle already present"
        return 0
    fi
    
    print_warning "Sparkle package must be added manually in Xcode:"
    echo ""
    echo "  1. Open Gaze.xcodeproj in Xcode"
    echo "  2. Select the project in the navigator"
    echo "  3. Go to 'Package Dependencies' tab"
    echo "  4. Click '+' button"
    echo "  5. Enter: ${SPARKLE_REPO}"
    echo "  6. Select version ${SPARKLE_VERSION}"
    echo "  7. Click 'Add Package'"
    echo "  8. Select 'Sparkle' product and add to Gaze target"
    echo ""
    print_info "Or run this from command line:"
    echo "  xed Gaze.xcodeproj"
    echo ""
    
    # Note: Programmatically adding Swift packages via pbxproj is extremely complex
    # and error-prone. Manual addition via Xcode UI is recommended.
    
    return 0
}

# Function to create backup directories
create_backup_dirs() {
    mkdir -p "${APPSTORE_CONFIG}"
    mkdir -p "${SELF_CONFIG}"
}

# Function to backup current configuration
backup_current_config() {
    local config_name=$1
    local config_dir=$2
    
    print_info "Backing up ${config_name} configuration..."
    
    # Backup Info.plist
    if [ -f "${INFO_PLIST}" ]; then
        cp "${INFO_PLIST}" "${config_dir}/Info.plist"
    fi
    
    # Backup entitlements
    if [ -f "${ENTITLEMENTS}" ]; then
        cp "${ENTITLEMENTS}" "${config_dir}/Gaze.entitlements"
    fi
    
    # Backup relevant parts of project.pbxproj (just the Release config)
    if [ -f "${PROJECT_FILE}" ]; then
        # Extract the Release configuration section
        awk '/27A21B5F2F0F69DD0018C4F3 \/\* Release \*\/ = {/,/name = Release;/ {print}' "${PROJECT_FILE}" > "${config_dir}/project_release.txt"
    fi
    
    print_success "Backed up ${config_name} configuration"
}

# Function to restore configuration
restore_config() {
    local config_name=$1
    local config_dir=$2
    
    print_info "Restoring ${config_name} configuration..."
    
    # Restore Info.plist
    if [ -f "${config_dir}/Info.plist" ]; then
        cp "${config_dir}/Info.plist" "${INFO_PLIST}"
        print_success "Restored Info.plist"
    else
        print_warning "No Info.plist backup found for ${config_name}"
    fi
    
    # Restore entitlements
    if [ -f "${config_dir}/Gaze.entitlements" ]; then
        cp "${config_dir}/Gaze.entitlements" "${ENTITLEMENTS}"
        print_success "Restored entitlements"
    else
        print_warning "No entitlements backup found for ${config_name}"
    fi
    
    # Restore project.pbxproj Release configuration
    if [ -f "${config_dir}/project_release.txt" ]; then
        # Check if we're restoring to appstore or self mode based on file content
        if grep -q "OTHER_SWIFT_FLAGS.*APPSTORE" "${config_dir}/project_release.txt"; then
            # Add APPSTORE flag
            if ! grep -q "OTHER_SWIFT_FLAGS.*APPSTORE" "${PROJECT_FILE}"; then
                # Find the Release config section and add the flag
                sed -i.backup '/27A21B5F2F0F69DD0018C4F3 \/\* Release \*\/ = {/,/name = Release;/{
                    /MARKETING_VERSION = /a\
				OTHER_SWIFT_FLAGS = "-D APPSTORE";
                }' "${PROJECT_FILE}"
                rm -f "${PROJECT_FILE}.backup"
                print_success "Added APPSTORE compiler flag"
            fi
        else
            # Remove APPSTORE flag
            if grep -q "OTHER_SWIFT_FLAGS.*APPSTORE" "${PROJECT_FILE}"; then
                sed -i.backup '/OTHER_SWIFT_FLAGS = "-D APPSTORE";/d' "${PROJECT_FILE}"
                rm -f "${PROJECT_FILE}.backup"
                print_success "Removed APPSTORE compiler flag"
            fi
        fi
    else
        print_warning "No project.pbxproj backup found for ${config_name}"
    fi
}

# Function to initialize configurations if they don't exist
initialize_configs() {
    create_backup_dirs
    
    # Check if we have existing backups
    if [ ! -f "${SELF_CONFIG}/Info.plist" ]; then
        print_info "No self-distribution config found. Creating from current state..."
        
        # The current state should be self-distribution (before my changes)
        # Let's create the self-distribution version with Sparkle keys
        cat > "${SELF_CONFIG}/Info.plist" <<'EOF'
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleExecutable</key>
	<string>$(EXECUTABLE_NAME)</string>
	<key>CFBundlePackageType</key>
	<string>APPL</string>
	<key>LSUIElement</key>
	<true/>
	<key>LSApplicationCategoryType</key>
	<string>public.app-category.productivity</string>
	<key>CFBundleName</key>
	<string>Gaze</string>
	<key>CFBundleDisplayName</key>
	<string>Gaze</string>
	<key>CFBundleIdentifier</key>
	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
	<key>CFBundleVersion</key>
	<string>$(CURRENT_PROJECT_VERSION)</string>
	<key>CFBundleShortVersionString</key>
	<string>$(MARKETING_VERSION)</string>
	<key>NSHumanReadableCopyright</key>
	<string>Copyright © 2026 Mike Freno. All rights reserved.</string>
	<key>SUPublicEDKey</key>
	<string>Z2RmohI1y2bgeGQQUDqO9F0HNF2AzFotOt8CwGB6VJM=</string>
	<key>SUFeedURL</key>
	<string>https://freno.me/api/Gaze/appcast.xml</string>
	<key>SUEnableAutomaticChecks</key>
	<true/>
	<key>SUScheduledCheckInterval</key>
	<integer>86400</integer>
	<key>SUEnableInstallerLauncherService</key>
	<true/>
</dict>
</plist>
EOF
        
        cat > "${SELF_CONFIG}/Gaze.entitlements" <<'EOF'
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>com.apple.security.app-sandbox</key>
	<true/>
	<key>com.apple.security.network.client</key>
	<true/>
	<key>com.apple.security.temporary-exception.mach-lookup.global-name</key>
	<array>
		<string>$(PRODUCT_BUNDLE_IDENTIFIER)-spks</string>
		<string>$(PRODUCT_BUNDLE_IDENTIFIER)-spki</string>
	</array>
</dict>
</plist>
EOF
        
        # Extract current Release config WITHOUT APPSTORE flag
        awk '/27A21B5F2F0F69DD0018C4F3 \/\* Release \*\/ = {/,/name = Release;/ {
            if ($0 !~ /OTHER_SWIFT_FLAGS/) {
                print
            } else {
                # Skip the APPSTORE flag line
                if ($0 !~ /APPSTORE/) {
                    print
                }
            }
        }' "${PROJECT_FILE}" > "${SELF_CONFIG}/project_release.txt"
        
        print_success "Created self-distribution config"
    fi
    
    if [ ! -f "${APPSTORE_CONFIG}/Info.plist" ]; then
        print_info "Creating App Store config..."
        
        # Backup current state as App Store config (after my changes)
        backup_current_config "App Store" "${APPSTORE_CONFIG}"
    fi
}

# Function to show current distribution mode
show_current_mode() {
    print_info "Current configuration:"
    echo ""
    
    # Check for Sparkle keys in Info.plist
    if grep -q "SUPublicEDKey" "${INFO_PLIST}" 2>/dev/null; then
        echo "  Info.plist: ${GREEN}Self-Distribution${NC} (has Sparkle keys)"
    else
        echo "  Info.plist: ${BLUE}App Store${NC} (no Sparkle keys)"
    fi
    
    # Check for Sparkle entitlements
    if grep -q "mach-lookup.global-name" "${ENTITLEMENTS}" 2>/dev/null; then
        echo "  Entitlements: ${GREEN}Self-Distribution${NC} (has Sparkle exceptions)"
    else
        echo "  Entitlements: ${BLUE}App Store${NC} (no Sparkle exceptions)"
    fi
    
    # Check for APPSTORE flag
    if grep -q "OTHER_SWIFT_FLAGS.*APPSTORE" "${PROJECT_FILE}" 2>/dev/null; then
        echo "  Build Settings: ${BLUE}App Store${NC} (has APPSTORE flag)"
    else
        echo "  Build Settings: ${GREEN}Self-Distribution${NC} (no APPSTORE flag)"
    fi
    
    # Check for Sparkle package dependency
    if has_sparkle_package || grep -q "Sparkle" "${PROJECT_FILE}" 2>/dev/null; then
        echo "  Package Dependency: ${GREEN}Self-Distribution${NC} (has Sparkle)"
    else
        echo "  Package Dependency: ${BLUE}App Store${NC} (no Sparkle)"
    fi
    
    echo ""
}

# Function to switch to App Store configuration
switch_to_appstore() {
    print_info "Switching to App Store distribution configuration..."
    echo ""
    
    # Backup current state if it's self-distribution
    if grep -q "SUPublicEDKey" "${INFO_PLIST}" 2>/dev/null; then
        backup_current_config "self-distribution" "${SELF_CONFIG}"
    fi
    
    # Remove Sparkle package dependency
    remove_sparkle_package
    echo ""
    
    # Restore App Store config
    restore_config "App Store" "${APPSTORE_CONFIG}"
    
    echo ""
    print_success "Switched to App Store distribution mode"
    print_info "Sparkle framework has been removed from dependencies"
    print_info "You can now archive and submit to App Store"
}

# Function to switch to self-distribution configuration
switch_to_self() {
    print_info "Switching to self-distribution configuration..."
    echo ""
    
    # Backup current state if it's App Store
    if ! grep -q "SUPublicEDKey" "${INFO_PLIST}" 2>/dev/null; then
        backup_current_config "App Store" "${APPSTORE_CONFIG}"
    fi
    
    # Restore self-distribution config
    restore_config "self-distribution" "${SELF_CONFIG}"
    
    echo ""
    
    # Add Sparkle package dependency
    add_sparkle_package
    
    echo ""
    print_success "Switched to self-distribution mode"
    print_info "Sparkle auto-updates enabled"
    
    if ! has_sparkle_package; then
        echo ""
        print_warning "Remember to add Sparkle package in Xcode (see instructions above)"
    fi
}

# Function to show usage
show_usage() {
    cat << EOF
${BLUE}Gaze Distribution Configuration Switcher${NC}

${GREEN}Usage:${NC}
  ./switch_to [command]

${GREEN}Commands:${NC}
  appstore    Switch to App Store distribution configuration
              - Removes Sparkle package dependency from project
              - Removes Sparkle keys from Info.plist
              - Removes Sparkle entitlements
              - Adds APPSTORE compiler flag
              
  self        Switch to self-distribution configuration
              - Prompts to add Sparkle package dependency
              - Adds Sparkle keys to Info.plist
              - Adds Sparkle entitlements for XPC services
              - Removes APPSTORE compiler flag
              
  status      Show current distribution configuration
  
  help        Show this help message

${GREEN}Examples:${NC}
  ./switch_to appstore    # Prepare for App Store submission
  ./switch_to self        # Prepare for direct distribution with auto-updates
  ./switch_to status      # Check current configuration

${YELLOW}Note:${NC} Configuration backups are stored in ${BACKUP_DIR}/
EOF
}

# Main script logic
main() {
    # Check if we're in the right directory
    if [ ! -f "${PROJECT_FILE}" ]; then
        print_error "Not in Gaze project directory. Please run from project root."
        exit 1
    fi
    
    # Initialize configurations if needed
    initialize_configs
    
    # Parse command
    case "${1:-}" in
        appstore)
            switch_to_appstore
            ;;
        self)
            switch_to_self
            ;;
        status)
            show_current_mode
            ;;
        help|--help|-h)
            show_usage
            ;;
        *)
            print_error "Unknown command: ${1:-}"
            echo ""
            show_usage
            exit 1
            ;;
    esac
}

# Run main function
main "$@"