#!/bin/bash
#
# Dune Weaver CLI
#
# Usage: dw <command>
#
# Commands:
#   install     Run initial setup
#   start       Start Dune Weaver
#   stop        Stop Dune Weaver
#   restart     Restart Dune Weaver
#   update      Pull latest changes and restart
#   logs        View live logs (Ctrl+C to exit)
#   status      Show service status
#   shell       Open a shell with the venv activated
#   checkout    Switch to a branch and rebuild
#   touch       Manage touch screen app
#   wifi        Manage WiFi and hotspot
#   help        Show this help message
#

set -e

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

# Find dune-weaver directory
find_install_dir() {
    # Check common locations
    if [[ -f "$HOME/dune-weaver/main.py" ]]; then
        echo "$HOME/dune-weaver"
    elif [[ -f "/home/pi/dune-weaver/main.py" ]]; then
        echo "/home/pi/dune-weaver"
    elif [[ -f "./main.py" ]]; then
        pwd
    else
        echo ""
    fi
}

INSTALL_DIR=$(find_install_dir)

# Check if installed
check_installed() {
    if [[ -z "$INSTALL_DIR" ]]; then
        echo -e "${RED}Error: Dune Weaver not found${NC}"
        echo ""
        echo "Please install first:"
        echo "  git clone https://github.com/tuanchris/dune-weaver --single-branch"
        echo "  cd dune-weaver"
        echo "  dw install"
        exit 1
    fi
}

# Commands
cmd_install() {
    if [[ -z "$INSTALL_DIR" ]]; then
        # Not installed, check if we're in the right directory
        if [[ -f "./main.py" ]] && [[ -f "./requirements.txt" ]]; then
            INSTALL_DIR=$(pwd)
        else
            echo -e "${RED}Error: Run this from the dune-weaver directory${NC}"
            echo ""
            echo "  git clone https://github.com/tuanchris/dune-weaver --single-branch"
            echo "  cd dune-weaver"
            echo "  dw install"
            exit 1
        fi
    fi

    cd "$INSTALL_DIR"
    bash setup-pi.sh "$@"
}

cmd_start() {
    check_installed
    echo -e "${BLUE}Starting Dune Weaver...${NC}"
    sudo systemctl start dune-weaver
    echo -e "${GREEN}Started!${NC} Access at http://$(hostname -I | awk '{print $1}')"
}

cmd_stop() {
    check_installed
    echo -e "${BLUE}Stopping Dune Weaver...${NC}"
    sudo systemctl stop dune-weaver
    echo -e "${GREEN}Stopped${NC}"
}

cmd_restart() {
    check_installed
    echo -e "${BLUE}Restarting Dune Weaver...${NC}"
    sudo systemctl restart dune-weaver
    echo -e "${GREEN}Restarted${NC}"
}

cmd_update() {
    check_installed
    echo -e "${BLUE}Updating Dune Weaver...${NC}"
    cd "$INSTALL_DIR"

    # Check if we should skip the pull phase (called after re-exec)
    if [[ "$1" != "--continue" ]]; then
        echo "Pulling latest code..."
        git config --global --add safe.directory "$INSTALL_DIR" 2>/dev/null || true
        local branch
        branch=$(git rev-parse --abbrev-ref HEAD)
        git fetch origin "$branch"
        git reset --hard "origin/$branch"

        # Update dw CLI
        echo "Updating dw command..."
        sudo cp "$INSTALL_DIR/dw" /usr/local/bin/dw
        sudo chmod +x /usr/local/bin/dw

        # Re-exec with the new script to ensure new code runs
        echo "Restarting with updated CLI..."
        exec /usr/local/bin/dw update --continue
    fi

    # Detect Docker-to-native migration: no venv means first native run
    if [[ ! -d "$INSTALL_DIR/.venv" ]]; then
        echo ""
        echo -e "${YELLOW}Migrating to native deployment (first time setup)...${NC}"
        echo "This may take a few minutes."
        echo ""

        # Install native system dependencies (nginx, python3-venv, gcc, etc.)
        echo "Installing system dependencies..."
        sudo apt update
        sudo DEBIAN_FRONTEND=noninteractive apt install -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" \
            python3-venv python3-pip python3-dev \
            gcc g++ make swig unzip wget \
            libjpeg-dev zlib1g-dev \
            libgpiod-dev gpiod \
            nginx

        # Create Python venv
        echo "Creating Python virtual environment..."
        python3 -m venv .venv

        # Stop and remove Docker containers/service if running
        if command -v docker &> /dev/null; then
            echo "Stopping Docker containers..."
            sudo docker compose down 2>/dev/null || true
        fi
    fi

    echo "Updating Python dependencies..."
    source .venv/bin/activate
    pip install -r requirements.txt

    # Update nginx config
    echo "Updating nginx config..."
    sudo cp "$INSTALL_DIR/nginx/dune-weaver.conf" /etc/nginx/sites-available/dune-weaver.conf
    sudo sed -i "s|INSTALL_DIR_PLACEHOLDER|$INSTALL_DIR|g" /etc/nginx/sites-available/dune-weaver.conf
    sudo ln -sf /etc/nginx/sites-available/dune-weaver.conf /etc/nginx/sites-enabled/dune-weaver.conf
    sudo rm -f /etc/nginx/sites-enabled/default
    sudo nginx -t && sudo systemctl restart nginx

    # Update systemd service
    echo "Updating systemd service..."
    sudo cp "$INSTALL_DIR/dune-weaver.service" /etc/systemd/system/dune-weaver.service
    sudo sed -i "s|USER_PLACEHOLDER|$USER|g" /etc/systemd/system/dune-weaver.service
    sudo sed -i "s|INSTALL_DIR_PLACEHOLDER|$INSTALL_DIR|g" /etc/systemd/system/dune-weaver.service
    sudo systemctl daemon-reload
    sudo systemctl enable dune-weaver

    echo "Restarting service..."
    sudo systemctl restart dune-weaver

    # Install/update WiFi host scripts if not present
    if [[ -f "$INSTALL_DIR/wifi/setup-wifi.sh" ]]; then
        if [[ ! -f /usr/local/bin/autohotspot ]]; then
            echo ""
            echo -e "${BLUE}Installing autohotspot WiFi scripts...${NC}"
            sudo bash "$INSTALL_DIR/wifi/setup-wifi.sh"
        else
            # Always update the script and service files to latest
            echo "Updating WiFi host scripts..."
            sudo cp "$INSTALL_DIR/wifi/autohotspot" /usr/local/bin/autohotspot
            sudo chmod +x /usr/local/bin/autohotspot

            # Update service/timer files
            sudo cp "$INSTALL_DIR/wifi/autohotspot.service" /etc/systemd/system/autohotspot.service
            sudo cp "$INSTALL_DIR/wifi/autohotspot-check.service" /etc/systemd/system/autohotspot-check.service 2>/dev/null || true
            sudo cp "$INSTALL_DIR/wifi/autohotspot-check.timer" /etc/systemd/system/autohotspot-check.timer 2>/dev/null || true
            sudo systemctl daemon-reload
            sudo systemctl enable autohotspot-check.timer 2>/dev/null || true
        fi
    fi

    # Update touch app if installed (check both directory and service exist)
    local touch_dir="$INSTALL_DIR/dune-weaver-touch"
    if [[ -d "$touch_dir" ]] && systemctl list-unit-files dune-weaver-touch.service 2>/dev/null | grep -q dune-weaver-touch; then
        echo ""
        echo -e "${BLUE}Updating touch app...${NC}"
        cd "$touch_dir"

        # Update Python dependencies (code already pulled with main repo)
        if [[ -f "requirements.txt" ]] && [[ -d ".venv" ]]; then
            echo "Updating touch app dependencies..."
            source .venv/bin/activate
            pip install -q -r requirements.txt
            deactivate
        fi

        # Restart to apply changes
        sudo systemctl restart dune-weaver-touch
        echo -e "${GREEN}Touch app updated!${NC}"
    fi

    echo -e "${GREEN}Update complete!${NC}"
    echo ""
    echo -e "${YELLOW}Please reload the web page in your browser to see the changes.${NC}"
}

cmd_logs() {
    check_installed

    # Parse optional line count (e.g., dw logs 100)
    local lines="${1:-}"

    if [[ -n "$lines" ]]; then
        sudo journalctl -u dune-weaver -n "$lines"
    else
        sudo journalctl -u dune-weaver -f
    fi
}

cmd_status() {
    check_installed
    sudo systemctl status dune-weaver
}

cmd_shell() {
    check_installed
    cd "$INSTALL_DIR"
    echo -e "${BLUE}Activating venv...${NC}"
    exec bash --init-file <(echo "source '$INSTALL_DIR/.venv/bin/activate'; cd '$INSTALL_DIR'; echo 'Dune Weaver venv activated. Type \"exit\" to leave.'")
}

# Touch app commands (systemd service)
cmd_touch() {
    local subcmd="${1:-help}"

    case "$subcmd" in
        logs)
            local lines="${2:-}"
            if [[ -n "$lines" ]]; then
                sudo journalctl -u dune-weaver-touch -n "$lines"
            else
                sudo journalctl -u dune-weaver-touch -f
            fi
            ;;
        restart)
            echo -e "${BLUE}Restarting touch app...${NC}"
            sudo systemctl restart dune-weaver-touch
            echo -e "${GREEN}Touch app restarted${NC}"
            ;;
        stop)
            echo -e "${BLUE}Stopping touch app...${NC}"
            sudo systemctl stop dune-weaver-touch
            echo -e "${GREEN}Touch app stopped${NC}"
            ;;
        start)
            echo -e "${BLUE}Starting touch app...${NC}"
            sudo systemctl start dune-weaver-touch
            echo -e "${GREEN}Touch app started${NC}"
            ;;
        status)
            sudo systemctl status dune-weaver-touch
            ;;
        install)
            check_installed
            local touch_dir="$INSTALL_DIR/dune-weaver-touch"

            if [[ ! -f "$touch_dir/install.sh" ]]; then
                echo -e "${RED}Touch app installer not found at $touch_dir/install.sh${NC}"
                echo "Make sure you have the dune-weaver-touch directory in your dune-weaver folder."
                exit 1
            fi

            echo -e "${BLUE}Running touch app installer...${NC}"
            cd "$touch_dir"
            sudo bash install.sh
            ;;
        help|*)
            echo -e "${GREEN}Touch App Commands${NC}"
            echo ""
            echo "Usage: dw touch <command>"
            echo ""
            echo "Commands:"
            echo "  install     Install touch app (clone, setup, enable service)"
            echo "  logs [N]    View logs (N lines or follow if omitted)"
            echo "  restart     Restart touch app"
            echo "  stop        Stop touch app"
            echo "  start       Start touch app"
            echo "  status      Show touch app status"
            echo "  help        Show this help message"
            ;;
    esac
}

cmd_checkout() {
    check_installed
    local branch="$1"

    if [[ -z "$branch" ]]; then
        echo -e "${RED}Usage: dw checkout <branch>${NC}"
        echo ""
        echo "Examples:"
        echo "  dw checkout main"
        echo "  dw checkout feature/security-settings-split"
        echo ""
        echo "Current branch: $(git -C "$INSTALL_DIR" rev-parse --abbrev-ref HEAD)"
        exit 1
    fi

    cd "$INSTALL_DIR"

    # Repo may be cloned with --single-branch; fetch the target branch explicitly
    echo -e "${BLUE}Fetching branch ${branch}...${NC}"
    if ! git fetch origin "$branch" 2>/dev/null; then
        echo -e "${RED}Branch '${branch}' not found on remote${NC}"
        exit 1
    fi

    # Checkout: create local tracking branch if it doesn't exist
    if git show-ref --verify --quiet "refs/heads/$branch"; then
        git checkout "$branch"
        git reset --hard "origin/$branch"
    else
        git checkout -b "$branch" "origin/$branch"
    fi

    echo -e "Switched to branch: ${GREEN}${branch}${NC}"

    # Update Python dependencies
    echo "Updating Python dependencies..."
    source .venv/bin/activate
    pip install -r requirements.txt

    # Update dw CLI from the new branch
    sudo cp "$INSTALL_DIR/dw" /usr/local/bin/dw
    sudo chmod +x /usr/local/bin/dw

    # Restart service
    sudo systemctl restart dune-weaver

    # Install WiFi scripts if available on this branch but not yet installed
    if [[ -f "$INSTALL_DIR/wifi/setup-wifi.sh" ]] && [[ ! -f /usr/local/bin/autohotspot ]]; then
        echo ""
        echo -e "${BLUE}Installing autohotspot WiFi scripts...${NC}"
        sudo bash "$INSTALL_DIR/wifi/setup-wifi.sh"
    fi

    echo -e "${GREEN}Checkout complete!${NC}"
}

# WiFi / Hotspot commands
cmd_wifi() {
    local subcmd="${1:-help}"

    case "$subcmd" in
        status)
            check_installed
            echo -e "${BLUE}WiFi Status${NC}"
            echo ""

            # Show current mode
            local mode="unknown"
            if [[ -f /tmp/dw-wifi-mode ]]; then
                mode=$(cat /tmp/dw-wifi-mode)
            fi
            echo -e "Mode: ${GREEN}${mode}${NC}"

            # Show connected network
            local ssid
            ssid=$(nmcli -t -f GENERAL.CONNECTION dev show wlan0 2>/dev/null | head -1 | cut -d: -f2)
            if [[ -n "$ssid" && "$ssid" != "--" ]]; then
                echo -e "Network: ${GREEN}${ssid}${NC}"
            fi

            # Show IP
            local ip
            ip=$(nmcli -t -f IP4.ADDRESS dev show wlan0 2>/dev/null | head -1 | cut -d: -f2 | cut -d/ -f1)
            if [[ -n "$ip" ]]; then
                echo -e "IP: ${GREEN}${ip}${NC}"
            fi
            ;;
        scan)
            echo -e "${BLUE}Scanning for WiFi networks...${NC}"
            nmcli dev wifi rescan 2>/dev/null || true
            sleep 2
            nmcli dev wifi list
            ;;
        connect)
            echo -e "${BLUE}Available WiFi networks:${NC}"
            nmcli dev wifi rescan 2>/dev/null || true
            sleep 2
            nmcli dev wifi list
            echo ""
            read -p "Enter SSID to connect to: " ssid
            if [[ -z "$ssid" ]]; then
                echo -e "${RED}No SSID provided${NC}"
                exit 1
            fi
            read -sp "Enter password (leave empty for open networks): " password
            echo ""

            # Delete any stale connection profile for this SSID
            sudo nmcli con delete "$ssid" 2>/dev/null || true

            if [[ -n "$password" ]]; then
                # Create connection with explicit security settings
                # (nmcli dev wifi connect can fail on Trixie without key-mgmt)
                sudo nmcli con add type wifi ifname wlan0 con-name "$ssid" \
                    ssid "$ssid" \
                    wifi-sec.key-mgmt wpa-psk \
                    wifi-sec.psk "$password"
            else
                sudo nmcli con add type wifi ifname wlan0 con-name "$ssid" \
                    ssid "$ssid"
            fi

            echo -e "${BLUE}Connecting to '$ssid'...${NC}"
            if sudo nmcli con up "$ssid"; then
                echo -e "${GREEN}Connected!${NC}"
            else
                echo -e "${RED}Failed to connect. Check password and try again.${NC}"
                sudo nmcli con delete "$ssid" 2>/dev/null || true
                exit 1
            fi
            ;;
        hotspot)
            echo -e "${BLUE}Switching to hotspot mode...${NC}"
            sudo nmcli dev disconnect wlan0 2>/dev/null || true
            sudo nmcli con up DuneWeaver-Hotspot 2>/dev/null
            echo "hotspot" | sudo tee /tmp/dw-wifi-mode > /dev/null
            echo -e "${GREEN}Hotspot active!${NC} Connect to the 'Dune Weaver' WiFi network."
            ;;
        setup)
            check_installed
            cd "$INSTALL_DIR"
            sudo bash wifi/setup-wifi.sh
            ;;
        help|*)
            echo -e "${GREEN}WiFi Commands${NC}"
            echo ""
            echo "Usage: dw wifi <command>"
            echo ""
            echo "Commands:"
            echo "  status      Show current WiFi mode and connection"
            echo "  scan        Scan for available networks"
            echo "  connect     Interactive: scan + select + connect"
            echo "  hotspot     Force hotspot mode"
            echo "  setup       Run initial autohotspot setup"
            echo "  help        Show this help message"
            ;;
    esac
}

cmd_help() {
    echo -e "${GREEN}Dune Weaver CLI${NC}"
    echo ""
    echo "Usage: dw <command>"
    echo ""
    echo "Commands:"
    echo "  install     Run initial setup"
    echo "  start       Start Dune Weaver"
    echo "  stop        Stop Dune Weaver"
    echo "  restart     Restart Dune Weaver"
    echo "  update      Pull latest changes and restart"
    echo "  checkout    Switch to a branch and rebuild"
    echo "  logs [N]    View logs (N=number of lines, or follow if omitted)"
    echo "  status      Show service status"
    echo "  shell       Open a shell with the venv activated"
    echo "  touch       Manage touch screen app (run 'dw touch help')"
    echo "  wifi        Manage WiFi and hotspot (run 'dw wifi help')"
    echo "  help        Show this help message"
    echo ""
    if [[ -n "$INSTALL_DIR" ]]; then
        echo -e "Install directory: ${BLUE}$INSTALL_DIR${NC}"
    fi
}

# Main
case "${1:-help}" in
    install)
        shift
        cmd_install "$@"
        ;;
    start)
        cmd_start
        ;;
    stop)
        cmd_stop
        ;;
    restart)
        cmd_restart
        ;;
    update)
        cmd_update "$2"
        ;;
    checkout)
        cmd_checkout "$2"
        ;;
    logs)
        cmd_logs "$2"
        ;;
    status)
        cmd_status
        ;;
    shell)
        cmd_shell
        ;;
    touch)
        shift
        cmd_touch "$@"
        ;;
    wifi)
        shift
        cmd_wifi "$@"
        ;;
    help|--help|-h)
        cmd_help
        ;;
    *)
        echo -e "${RED}Unknown command: $1${NC}"
        echo ""
        cmd_help
        exit 1
        ;;
esac