#!/bin/bash
################################################################################
# Claude Code Installation Script with Z.AI API Support
################################################################################
# This script optionally installs Claude Code and configures it with Z.AI API
# from https://docs.z.ai/devpack/tool/claude
#
# Features:
# - Automated Claude Code installation via npm
# - Z.AI API configuration (GLM models)
# - Anthropic/Z.AI provider switching
# - API key update functionality
# - Z.AI coding-helper addon installation
# - Manual configuration instructions
#
# Usage: ./install-claude-code.sh [options]
#   --auto         Automatic installation with API key prompt
#   --manual       Show manual installation steps only
#   --skip-install Skip Claude Code installation, just configure API
################################################################################

set -e

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
MAGENTA='\033[0;35m'
BOLD='\033[1m'
NC='\033[0m' # No Color

# Claude config directory
CLAUDE_DIR="${HOME}/.claude"
SETTINGS_FILE="$CLAUDE_DIR/settings.json"

# Flags
AUTO_MODE=true
SKIP_INSTALL=false

################################################################################
# Helper Functions
################################################################################

log_info() {
    echo -e "${BLUE}[INFO]${NC} $1"
}

log_success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

log_warn() {
    echo -e "${YELLOW}[WARN]${NC} $1"
}

log_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

log_step() {
    echo -e "${CYAN}${BOLD}==>${NC} ${BOLD}$1${NC}"
}

print_banner() {
    echo -e "${MAGENTA}${BOLD}"
    cat << "EOF"
╔═══════════════════════════════════════════════════════════════╗
║                                                               ║
║   ███████╗██╗      █████╗  ██████╗                          ║
║   ██╔════╝██║     ██╔══██╗██╔════╝                          ║
║   ███████╗██║     ███████║██║  ███╗                         ║
║   ╚════██║██║     ██╔══██║██║   ██║                         ║
║   ███████║███████╗██║  ██║╚██████╔╝                         ║
║   ╚══════╝╚══════╝╚═╝  ╚═╝ ╚═════╝                          ║
║                                                               ║
║              + Z.AI API Integration (GLM Models)              ║
║                   + Provider Switching                        ║
║                   + Coding-Helper Addons                      ║
║                                                               ║
║                   Enhanced Installation Script                ║
║                                                               ║
╚═══════════════════════════════════════════════════════════════╝
EOF
    echo -e "${NC}"
    echo ""
    echo -e "${MAGENTA}${BOLD}🎁 Grab 10% OFF Token for z.ai coding plan:${NC} ${YELLOW}https://z.ai/subscribe?ic=R0K78RJKNW${NC}"
    echo ""
    echo -e "${CYAN}Official Documentation:${NC} https://docs.z.ai/devpack/tool/claude"
    echo ""
}

check_nodejs() {
    log_step "Checking for Node.js 18+..."

    if ! command -v node &> /dev/null; then
        log_error "Node.js not found!"
        echo ""
        echo -e "${YELLOW}Node.js 18 or newer is required to install Claude Code.${NC}"
        echo ""
        echo "Please install Node.js first:"
        echo "  - Ubuntu/Debian: sudo apt install nodejs npm"
        echo "  - Arch: sudo pacman -S nodejs npm"
        echo "  - macOS: brew install node"
        echo "  - Or visit: https://nodejs.org/"
        echo ""
        exit 1
    fi

    local node_version=$(node -v | cut -d'v' -f2 | cut -d'.' -f1)
    if [ "$node_version" -lt 18 ]; then
        log_error "Node.js version $node_version is too old!"
        echo "Node.js 18 or newer is required."
        exit 1
    fi

    log_success "Node.js $(node -v) found"
}

check_claude_code_installed() {
    if command -v claude &> /dev/null; then
        return 0
    else
        return 1
    fi
}

install_claude_code() {
    if [ "$SKIP_INSTALL" = true ]; then
        log_info "Skipping Claude Code installation (--skip-install flag)"
        return
    fi

    log_step "Installing Claude Code..."

    if check_claude_code_installed; then
        local current_version=$(claude --version 2>/dev/null | head -1 || echo "unknown")
        log_info "Claude Code already installed: $current_version"
        echo ""
        read -p "Update to latest version? [y/N] " -n 1 -r < /dev/tty
        echo ""
        if [[ $REPLY =~ ^[Yy]$ ]]; then
            log_info "Updating Claude Code..."
            npm update -g @anthropic-ai/claude-code
            log_success "Claude Code updated"
        fi
    else
        log_info "Installing Claude Code via npm..."
        npm install -g @anthropic-ai/claude-code
        log_success "Claude Code installed"
    fi

    echo ""
    claude --version
}

detect_current_provider() {
    if [ -f "$SETTINGS_FILE" ]; then
        if grep -q "dashscope-intl.aliyuncs.com" "$SETTINGS_FILE" 2>/dev/null; then
            echo "zai"
        elif grep -q "anthropic.com" "$SETTINGS_FILE" 2>/dev/null || \
             grep -q "ANTHROPIC_API_KEY" "$SETTINGS_FILE" 2>/dev/null; then
            echo "anthropic"
        else
            echo "unknown"
        fi
    else
        echo "none"
    fi
}

get_current_api_key() {
    if [ -f "$SETTINGS_FILE" ]; then
        # Try to extract API key using various methods
        if command -v python3 &> /dev/null; then
            python3 -c "
import json
import sys
try:
    with open('$SETTINGS_FILE', 'r') as f:
        settings = json.load(f)
    key = settings.get('env', {}).get('ANTHROPIC_API_KEY', '')
    if key:
        print(key)
except:
    pass
" 2>/dev/null
        fi
    fi
}

switch_provider() {
    local current_provider=$(detect_current_provider)
    local current_api_key=$(get_current_api_key)

    log_step "Current Configuration"
    echo ""

    case $current_provider in
        "anthropic")
            echo -e "${GREEN}Current Provider:${NC} Anthropic (Official)"
            if [ -n "$current_api_key" ]; then
                echo -e "${CYAN}API Key:${NC} ${current_api_key:0:10}...${current_api_key: -4}"
            fi
            ;;
        "zai")
            echo -e "${GREEN}Current Provider:${NC} Z.AI (GLM Models)"
            if [ -n "$current_api_key" ]; then
                echo -e "${CYAN}API Key:${NC} ${current_api_key:0:10}...${current_api_key: -4}"
            fi
            ;;
        "none")
            echo -e "${YELLOW}No configuration found.${NC}"
            ;;
        *)
            echo -e "${YELLOW}Unknown configuration.${NC}"
            ;;
    esac
    echo ""

    echo -e "${CYAN}${BOLD}Select your preferred API provider:${NC}"
    echo "  1) Z.AI (GLM Models: glm-4.5-air, glm-4.7) - 🎁 10% OFF: https://z.ai/subscribe?ic=R0K78RJKNW"
    echo "  2) Anthropic (Official Claude Models)"
    echo "  3) Update API key only (keep current provider)"
    echo "  4) Skip configuration"
    echo ""
    read -p "Choose option [1-4]: " -n 1 -r provider_choice < /dev/tty
    echo ""
    echo ""

    case $provider_choice in
        1)
            configure_zai_api
            ;;
        2)
            configure_anthropic_api
            ;;
        3)
            update_api_key_only
            ;;
        4)
            log_info "Skipping API configuration"
            return 1
            ;;
        *)
            log_error "Invalid choice"
            return 1
            ;;
    esac

    return 0
}

configure_zai_api() {
    log_step "Z.AI API Configuration"
    echo ""
    echo -e "${CYAN}To use Claude Code with Z.AI's GLM models, you need an API key.${NC}"
    echo ""
    echo -e "${YELLOW}Get your API key from:${NC} https://docs.z.ai/devpack/tool/claude"
    echo ""
    echo -e "${MAGENTA}${BOLD}🎁 Grab 10% OFF Token for z.ai coding plan:${NC} ${YELLOW}https://z.ai/subscribe?ic=R0K78RJKNW${NC}"
    echo ""
    echo -e "${MAGENTA}Your API key format is: ${BOLD}your-api-key-here${NC}"
    echo ""

    read -p "Enter your Z.AI API key (or press Enter to skip): " -r API_KEY < /dev/tty
    echo ""

    if [ -z "$API_KEY" ]; then
        log_warn "No API key provided."
        return 1
    fi

    apply_zai_config "$API_KEY"
    log_success "Z.AI API configured"
    log_info "API key set to: ${API_KEY:0:10}...${API_KEY: -4}"
}

configure_anthropic_api() {
    log_step "Anthropic API Configuration"
    echo ""
    echo -e "${CYAN}To use Claude Code with Anthropic's official models, you need an API key.${NC}"
    echo ""
    echo -e "${YELLOW}Get your API key from:${NC} https://console.anthropic.com/"
    echo ""
    echo -e "${MAGENTA}Your API key format is: ${BOLD}sk-ant-api03-...${NC}"
    echo ""

    read -p "Enter your Anthropic API key (or press Enter to skip): " -r API_KEY < /dev/tty
    echo ""

    if [ -z "$API_KEY" ]; then
        log_warn "No API key provided."
        return 1
    fi

    apply_anthropic_config "$API_KEY"
    log_success "Anthropic API configured"
    log_info "API key set to: ${API_KEY:0:10}...${API_KEY: -4}"
}

update_api_key_only() {
    local current_provider=$(detect_current_provider)

    log_step "Update API Key"
    echo ""

    case $current_provider in
        "anthropic")
            echo -e "${CYAN}Current provider: Anthropic${NC}"
            echo -e "${YELLOW}Enter new Anthropic API key:${NC}"
            ;;
        "zai")
            echo -e "${CYAN}Current provider: Z.AI${NC}"
            echo -e "${YELLOW}Enter new Z.AI API key:${NC}"
            ;;
        *)
            echo -e "${YELLOW}Could not detect current provider.${NC}"
            echo "Which provider's API key do you want to update?"
            echo "  1) Z.AI"
            echo "  2) Anthropic"
            read -p "Choose [1-2]: " -n 1 -r key_choice < /dev/tty
            echo ""
            case $key_choice in
                1) current_provider="zai" ;;
                2) current_provider="anthropic" ;;
                *) return 1 ;;
            esac
            ;;
    esac

    read -p "Enter new API key: " -r API_KEY < /dev/tty
    echo ""

    if [ -z "$API_KEY" ]; then
        log_warn "No API key provided."
        return 1
    fi

    if [ "$current_provider" = "zai" ]; then
        apply_zai_config "$API_KEY"
    else
        apply_anthropic_config "$API_KEY"
    fi

    log_success "API key updated"
}

apply_zai_config() {
    local api_key="$1"

    mkdir -p "$CLAUDE_DIR"

    # Backup existing settings
    if [ -f "$SETTINGS_FILE" ]; then
        cp "$SETTINGS_FILE" "$SETTINGS_FILE.backup-$(date +%Y%m%d_%H%M%S)"
        log_info "Backed up existing settings.json"
    fi

    # Create or update settings.json with Z.AI configuration
    if [ -f "$SETTINGS_FILE" ]; then
        # Merge with existing settings
        if command -v python3 &> /dev/null; then
            python3 << PYTHON_SCRIPT
import json
import sys

try:
    with open('$SETTINGS_FILE', 'r') as f:
        settings = json.load(f)
except:
    settings = {}

# Add or update env section
if 'env' not in settings:
    settings['env'] = {}

# Configure Z.AI GLM models
settings['env']['ANTHROPIC_API_KEY'] = '$api_key'
settings['env']['ANTHROPIC_DEFAULT_HAIKU_MODEL'] = 'glm-4.5-air'
settings['env']['ANTHROPIC_DEFAULT_SONNET_MODEL'] = 'glm-4.7'
settings['env']['ANTHROPIC_DEFAULT_OPUS_MODEL'] = 'glm-4.7'
settings['env']['ANTHROPIC_BASE_URL'] = 'https://dashscope-intl.aliyuncs.com/compatible-mode/v1'

with open('$SETTINGS_FILE', 'w') as f:
    json.dump(settings, f, indent=2)
PYTHON_SCRIPT
        else
            # Fallback if python3 not available
            cat > "$SETTINGS_FILE" << EOF
{
  "env": {
    "ANTHROPIC_API_KEY": "$api_key",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "glm-4.5-air",
    "ANTHROPIC_DEFAULT_SONNET_MODEL": "glm-4.7",
    "ANTHROPIC_DEFAULT_OPUS_MODEL": "glm-4.7",
    "ANTHROPIC_BASE_URL": "https://dashscope-intl.aliyuncs.com/compatible-mode/v1"
  }
}
EOF
        fi
    else
        # Create new settings.json
        cat > "$SETTINGS_FILE" << EOF
{
  "env": {
    "ANTHROPIC_API_KEY": "$api_key",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "glm-4.5-air",
    "ANTHROPIC_DEFAULT_SONNET_MODEL": "glm-4.7",
    "ANTHROPIC_DEFAULT_OPUS_MODEL": "glm-4.7",
    "ANTHROPIC_BASE_URL": "https://dashscope-intl.aliyuncs.com/compatible-mode/v1"
  }
}
EOF
    fi
}

apply_anthropic_config() {
    local api_key="$1"

    mkdir -p "$CLAUDE_DIR"

    # Backup existing settings
    if [ -f "$SETTINGS_FILE" ]; then
        cp "$SETTINGS_FILE" "$SETTINGS_FILE.backup-$(date +%Y%m%d_%H%M%S)"
        log_info "Backed up existing settings.json"
    fi

    # Create or update settings.json with Anthropic configuration
    if [ -f "$SETTINGS_FILE" ]; then
        # Merge with existing settings
        if command -v python3 &> /dev/null; then
            python3 << PYTHON_SCRIPT
import json
import sys

try:
    with open('$SETTINGS_FILE', 'r') as f:
        settings = json.load(f)
except:
    settings = {}

# Add or update env section
if 'env' not in settings:
    settings['env'] = {}

# Configure Anthropic (remove Z.AI specific settings if present)
settings['env']['ANTHROPIC_API_KEY'] = '$api_key'
# Remove Z.AI base URL if present
settings['env'].pop('ANTHROPIC_BASE_URL', None)
# Reset to default Anthropic models if they were set to GLM
if settings['env'].get('ANTHROPIC_DEFAULT_HAIKU_MODEL', '').startswith('glm-'):
    settings['env']['ANTHROPIC_DEFAULT_HAIKU_MODEL'] = 'claude-3-5-haiku'
if settings['env'].get('ANTHROPIC_DEFAULT_SONNET_MODEL', '').startswith('glm-'):
    settings['env']['ANTHROPIC_DEFAULT_SONNET_MODEL'] = 'claude-3-5-sonnet'
if settings['env'].get('ANTHROPIC_DEFAULT_OPUS_MODEL', '').startswith('glm-'):
    settings['env']['ANTHROPIC_DEFAULT_OPUS_MODEL'] = 'claude-3-5-sonnet'

with open('$SETTINGS_FILE', 'w') as f:
    json.dump(settings, f, indent=2)
PYTHON_SCRIPT
        else
            # Fallback minimal config
            cat > "$SETTINGS_FILE" << EOF
{
  "env": {
    "ANTHROPIC_API_KEY": "$api_key"
  }
}
EOF
        fi
    else
        # Create new settings.json
        cat > "$SETTINGS_FILE" << EOF
{
  "env": {
    "ANTHROPIC_API_KEY": "$api_key"
  }
}
EOF
    fi
}

check_coding_helper_installed() {
    if command -v chelper &> /dev/null || npm list -g @z_ai/coding-helper &> /dev/null 2>&1; then
        return 0
    else
        return 1
    fi
}

offer_coding_helper_addons() {
    log_step "Z.AI Coding-Helper Addons"
    echo ""
    echo -e "${CYAN}Z.AI's coding-helper (chelper) provides additional features:${NC}"
    echo ""
    echo -e "  ${GREEN}✓${NC} Interactive wizard for easy setup"
    echo -e "  ${GREEN}✓${NC} Multi-tool management (Claude Code, OpenCode, etc.)"
    echo -e "  ${GREEN}✓${NC} MCP service configuration"
    echo -e "  ${GREEN}✓${NC} API key management for both Global and China plans"
    echo -e "  ${GREEN}✓${NC} Bilingual interface (English/Chinese)"
    echo ""
    echo -e "${YELLOW}Available addons/features:${NC}"
    echo "  • MCP servers integration (Blender, filesystem, etc.)"
    echo "  • Plugin marketplace access"
    echo "  • Automatic tool detection and installation"
    echo "  • Configuration backup and sync"
    echo ""
    read -p "Install Z.AI coding-helper? [y/N] " -n 1 -r install_helper < /dev/tty
    echo ""

    if [[ ! $install_helper =~ ^[Yy]$ ]]; then
        log_info "Skipping coding-helper installation"
        return
    fi

    install_coding_helper
}

install_coding_helper() {
    log_info "Installing @z_ai/coding-helper..."
    echo ""

    if check_coding_helper_installed; then
        log_info "coding-helper already installed"
        echo ""
        read -p "Launch coding-helper wizard now? [y/N] " -n 1 -r launch_helper < /dev/tty
        echo ""
        if [[ $launch_helper =~ ^[Yy]$ ]]; then
            launch_coding_helper
        fi
        return
    fi

    # Install the helper
    if npm install -g @z_ai/coding-helper 2>/dev/null; then
        log_success "coding-helper installed successfully"
        echo ""
        echo -e "${CYAN}You can now run:${NC} ${YELLOW}chelper${NC} ${CYAN}or${NC} ${YELLOW}npx @z_ai/coding-helper${NC}"
        echo ""
        read -p "Launch coding-helper wizard now? [y/N] " -n 1 -r launch_helper < /dev/tty
        echo ""
        if [[ $launch_helper =~ ^[Yy]$ ]]; then
            launch_coding_helper
        fi
    else
        log_warn "Installation completed. You can run manually with:"
        echo -e "  ${YELLOW}npx @z_ai/coding-helper${NC}"
    fi
}

launch_coding_helper() {
    log_info "Launching Z.AI coding-helper wizard..."
    echo ""
    echo -e "${CYAN}The wizard will guide you through:${NC}"
    echo "  1. Selecting UI language"
    echo "  2. Choosing coding plan (Global/China)"
    echo "  3. Entering API key"
    echo "  4. Selecting tools to manage"
    echo "  5. Installing and configuring tools"
    echo "  6. Managing MCP services"
    echo ""

    if command -v chelper &> /dev/null; then
        chelper
    else
        npx @z_ai/coding-helper
    fi
}

show_manual_instructions() {
    echo ""
    echo -e "${CYAN}${BOLD}═══════════════════════════════════════════════════════════════${NC}"
    echo -e "${CYAN}${BOLD}              Manual Installation Instructions${NC}"
    echo -e "${CYAN}${BOLD}═══════════════════════════════════════════════════════════════${NC}"
    echo ""
    echo -e "${GREEN}Step 1: Install Claude Code${NC}"
    echo "─────────────────────────────────────────────────────────────────"
    echo ""
    echo "  # Prerequisites: Node.js 18 or newer"
    echo "  npm install -g @anthropic-ai/claude-code"
    echo ""
    echo "  # Verify installation"
    echo "  claude --version"
    echo ""
    echo -e "${GREEN}Step 2: Choose Your API Provider${NC}"
    echo "─────────────────────────────────────────────────────────────────"
    echo ""
    echo -e "${CYAN}Option A: Z.AI (GLM Models)${NC}"
    echo -e "  ${MAGENTA}${BOLD}🎁 Grab 10% OFF Token for z.ai coding plan:${NC}"
    echo -e "  ${YELLOW}https://z.ai/subscribe?ic=R0K78RJKNW${NC}"
    echo ""
    echo "  Get your API key: https://docs.z.ai/devpack/tool/claude"
    echo ""
    echo "  Configure ~/.claude/settings.json:"
    echo -e "${YELLOW}  {${NC}"
    echo -e "${YELLOW}    \"env\": {${NC}"
    echo -e "${YELLOW}      \"ANTHROPIC_API_KEY\": \"your-zai-api-key\",${NC}"
    echo -e "${YELLOW}      \"ANTHROPIC_DEFAULT_HAIKU_MODEL\": \"glm-4.5-air\",${NC}"
    echo -e "${YELLOW}      \"ANTHROPIC_DEFAULT_SONNET_MODEL\": \"glm-4.7\",${NC}"
    echo -e "${YELLOW}      \"ANTHROPIC_DEFAULT_OPUS_MODEL\": \"glm-4.7\",${NC}"
    echo -e "${YELLOW}      \"ANTHROPIC_BASE_URL\": \"https://dashscope-intl.aliyuncs.com/compatible-mode/v1\"${NC}"
    echo -e "${YELLOW}    }${NC}"
    echo -e "${YELLOW}  }${NC}"
    echo ""
    echo -e "${CYAN}Option B: Anthropic (Official)${NC}"
    echo "  Get your API key: https://console.anthropic.com/"
    echo ""
    echo "  Configure ~/.claude/settings.json:"
    echo -e "${YELLOW}  {${NC}"
    echo -e "${YELLOW}    \"env\": {${NC}"
    echo -e "${YELLOW}      \"ANTHROPIC_API_KEY\": \"sk-ant-api03-...\"${NC}"
    echo -e "${YELLOW}    }${NC}"
    echo -e "${YELLOW}  }${NC}"
    echo ""
    echo -e "${GREEN}Step 3: Start Claude Code${NC}"
    echo "─────────────────────────────────────────────────────────────────"
    echo ""
    echo "  cd your-project-directory"
    echo "  claude"
    echo ""
    echo "  # Check model status with: /status"
    echo ""
    echo -e "${GREEN}Step 4 (Optional): Z.AI Coding-Helper${NC}"
    echo "─────────────────────────────────────────────────────────────────"
    echo ""
    echo "  # Install the helper tool"
    echo "  npm install -g @z_ai/coding-helper"
    echo ""
    echo "  # Or run directly"
    echo "  npx @z_ai/coding-helper"
    echo ""
    echo -e "${GREEN}Available Models${NC}"
    echo "─────────────────────────────────────────────────────────────────"
    echo ""
    echo -e "${CYAN}Z.AI GLM Models:${NC}"
    echo "  • glm-4.5-air  - Fast, efficient (Haiku class)"
    echo "  • glm-4.7      - Powerful (Sonnet/Opus class)"
    echo ""
    echo -e "${CYAN}Anthropic Models (default):${NC}"
    echo "  • claude-3-5-haiku   - Fast & efficient"
    echo "  • claude-3-5-sonnet  - Balanced power"
    echo "  • claude-3-5-sonnet  - Most capable"
    echo ""
    echo -e "${CYAN}${BOLD}═══════════════════════════════════════════════════════════════${NC}"
    echo ""
}

print_success_summary() {
    echo ""
    echo -e "${GREEN}${BOLD}╔═══════════════════════════════════════════════════════════════╗${NC}"
    echo -e "${GREEN}${BOLD}║                  Installation Complete!                          ║${NC}"
    echo -e "${GREEN}${BOLD}╚═══════════════════════════════════════════════════════════════╝${NC}"
    echo ""
    echo -e "${BOLD}Claude Code is ready with your chosen configuration!${NC}"
    echo ""
    echo -e "${CYAN}Quick Start:${NC}"
    echo -e "  1. ${YELLOW}cd your-project-directory${NC}"
    echo -e "  2. ${YELLOW}claude${NC}"
    echo -e "  3. ${YELLOW}/status${NC} - Check current model status"
    echo ""
    echo -e "${CYAN}Configuration File:${NC}"
    echo -e "  ${YELLOW}~/.claude/settings.json${NC}"
    echo ""
    echo -e "${CYAN}Switch Providers:${NC}"
    echo -e "  Run this script again: ${YELLOW}./install-claude-code.sh${NC}"
    echo ""
    echo -e "${CYAN}Z.AI Coding-Helper:${NC}"
    echo -e "  ${YELLOW}npx @z_ai/coding-helper${NC} - Interactive wizard"
    echo ""
    echo -e "${CYAN}Documentation:${NC}"
    echo -e "  ${YELLOW}https://docs.z.ai/devpack/tool/claude${NC}"
    echo ""
}

################################################################################
# Main Installation
################################################################################

main() {
    print_banner

    # Parse arguments
    while [[ $# -gt 0 ]]; do
        case $1 in
            --auto)
                AUTO_MODE=true
                shift
                ;;
            --manual)
                AUTO_MODE=false
                shift
                ;;
            --skip-install)
                SKIP_INSTALL=true
                shift
                ;;
            -h|--help)
                echo "Usage: $0 [options]"
                echo "  --auto         Automatic installation with provider selection (default)"
                echo "  --manual       Show manual installation steps only"
                echo "  --skip-install Skip Claude Code installation, just configure API"
                exit 0
                ;;
            *)
                log_error "Unknown option: $1"
                exit 1
                ;;
        esac
    done

    # Manual mode - just show instructions
    if [ "$AUTO_MODE" = false ]; then
        show_manual_instructions
        exit 0
    fi

    # Automatic mode
    check_nodejs

    # Check if Claude Code is already installed
    if check_claude_code_installed; then
        echo ""
        log_step "Claude Code Detection"
        log_info "Claude Code is already installed!"
        echo ""
        claude --version
        echo ""

        # Offer to switch provider or update API key
        if [ "$SKIP_INSTALL" = false ]; then
            if ! switch_provider; then
                log_info "No configuration changes made"
            fi
        fi
    else
        # Not installed - proceed with installation
        install_claude_code

        # After installation, configure API
        echo ""
        log_step "API Configuration"
        echo ""
        echo -e "${CYAN}${BOLD}Select your preferred API provider:${NC}"
        echo "  1) Z.AI (GLM Models: glm-4.5-air, glm-4.7) - 🎁 10% OFF"
        echo "  2) Anthropic (Official Claude Models)"
        echo "  3) Skip for now"
        echo ""
        read -p "Choose option [1-3]: " -n 1 -r initial_choice < /dev/tty
        echo ""
        echo ""

        case $initial_choice in
            1)
                configure_zai_api
                ;;
            2)
                configure_anthropic_api
                ;;
            3)
                log_info "Skipping API configuration"
                ;;
            *)
                log_error "Invalid choice"
                ;;
        esac
    fi

    # Offer Z.AI coding-helper addons
    offer_coding_helper_addons

    print_success_summary
}

# Run main function
main "$@"