#!/bin/bash
# Mole - Main Entry Point
# A comprehensive macOS maintenance tool
#
# 🧹 Clean - Remove junk files and optimize system
# 🗑️  Uninstall - Remove applications completely
#
# Usage:
#   ./mole                         # Interactive main menu
#   ./mole clean                   # Direct clean mode
#   ./mole uninstall               # Direct uninstall mode
#   ./mole --help                  # Show help

set -euo pipefail

# Get script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Source common functions
source "$SCRIPT_DIR/lib/common.sh"

# Version info
VERSION="1.3.0"
MOLE_TAGLINE="can dig deep to clean your Mac."

# Check for updates (non-blocking, cached)
check_for_updates() {
    local cache_dir="$HOME/.cache/mole"
    local version_cache="$cache_dir/version_check"
    local check_interval=86400  # Check once per day (24 hours)

    mkdir -p "$cache_dir" 2>/dev/null

    # Check if we should run version check (based on cache age)
    if [[ -f "$version_cache" ]]; then
        local cache_age=$(($(date +%s) - $(stat -f%m "$version_cache" 2>/dev/null || echo 0)))
        if [[ $cache_age -lt $check_interval ]]; then
            # Cache is still fresh, show cached message if exists
            if [[ -s "$version_cache" ]]; then
                cat "$version_cache"
            fi
            return 0
        fi
    fi

    # Run version check in background (non-blocking)
    (
        local latest_version=""
        local timeout=3  # 3 second timeout for version check

        # Try to fetch latest version from GitHub with timeout
        if command -v curl >/dev/null 2>&1; then
            latest_version=$(curl -fsSL --connect-timeout 2 --max-time $timeout \
                "https://api.github.com/repos/tw93/mole/releases/latest" 2>/dev/null | \
                grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed 's/^[Vv]//')
        elif command -v wget >/dev/null 2>&1; then
            latest_version=$(wget -qO- --timeout=$timeout --tries=1 \
                "https://api.github.com/repos/tw93/mole/releases/latest" 2>/dev/null | \
                grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed 's/^[Vv]//')
        fi

        # Compare versions if fetch succeeded
        if [[ -n "$latest_version" && "$latest_version" != "$VERSION" ]]; then
            # Version mismatch - cache the update message
            local msg="${YELLOW}📢 New version available: ${GREEN}${latest_version}${YELLOW} (current: ${VERSION})${NC}\n   Run ${GREEN}mole update${YELLOW} to upgrade${NC}"
            echo -e "$msg" > "$version_cache"
            echo -e "$msg"
        else
            # Up to date or check failed - clear cache
            echo "" > "$version_cache"
        fi

        # Touch cache file to update timestamp
        touch "$version_cache" 2>/dev/null
    ) &

    # Don't wait for background check
    disown 2>/dev/null || true
}

show_brand_banner() {
    cat << EOF
${GREEN} __  __       _      ${NC}
${GREEN}|  \/  | ___ | | ___ ${NC}
${GREEN}| |\/| |/ _ \| |/ _ \\${NC}
${GREEN}| |  | | (_) | |  __/${NC}  ${BLUE}https://github.com/tw93/mole${NC}
${GREEN}|_|  |_|\___/|_|\___|${NC}  ${GREEN}${MOLE_TAGLINE}${NC}

EOF
}

animate_mole_intro() {
    # Skip animation if stdout isn't a TTY (non-interactive)
    if [[ ! -t 1 ]]; then
        return
    fi

    clear_screen
    printf '\n'
    hide_cursor

    local -a mole_lines=()
    while IFS= read -r line; do
        mole_lines+=("$line")
    done <<'EOF'
        /\_/\
   ____/ o o \
 /~____  =o= /
(______)__m_m)
        /   \
     __/ /\ \__
    /__/  \__\_
EOF

    local idx
    local body_cutoff=4
    local body_color="${PURPLE}"
    local ground_color="${GREEN}"
    for idx in "${!mole_lines[@]}"; do
        if (( idx < body_cutoff )); then
            printf "%s\n" "${body_color}${mole_lines[$idx]}${NC}"
        else
            printf "%s\n" "${ground_color}${mole_lines[$idx]}${NC}"
        fi
        sleep 0.1
    done

    printf '\n'
    printf "%s\n" "${BLUE}Ready to dig deep...${NC}"
    sleep 0.5

    printf '\033[2J\033[H'
    show_cursor
}

show_version() {
    printf 'Mole version %s\n' "$VERSION"
}

show_help() {
    show_brand_banner
    echo
    printf "%s%s%s\n" "$BLUE" "USAGE" "$NC"
    printf "  %s%s%s [command]\n\n" "$GREEN" "mole" "$NC"

    printf "%s%s%s\n" "$BLUE" "COMMANDS" "$NC"
    printf "  %s%-20s%s %s\n" "$GREEN" "mole" "$NC" "Interactive main menu"
    printf "  %s%-20s%s %s\n" "$GREEN" "mole clean" "$NC" "Deeper system cleanup"
    printf "  %s%-20s%s %s\n" "$GREEN" "mole clean --dry-run" "$NC" "Preview cleanup (no deletions)"
    printf "  %s%-20s%s %s\n" "$GREEN" "mole uninstall" "$NC" "Remove applications completely"
    printf "  %s%-20s%s %s\n" "$GREEN" "mole update" "$NC" "Update Mole to the latest version"
    printf "  %s%-20s%s %s\n" "$GREEN" "mole --version" "$NC" "Show installed version"
    printf "  %s%-20s%s %s\n" "$GREEN" "mole --help" "$NC" "Show this help message"

    printf "\n%s%s%s\n" "$BLUE" "MORE" "$NC"
    printf "  https://github.com/tw93/mole\n\n"
}

# Simple update function
update_mole() {
    log_info "Updating Mole..."

    local installer_url="https://raw.githubusercontent.com/tw93/mole/main/install.sh"
    local tmp_installer
    tmp_installer="$(mktemp)" || { log_error "Failed to create temp file"; exit 1; }

    # Download installer with timeout
    if command -v curl >/dev/null 2>&1; then
        if ! curl -fsSL --connect-timeout 10 --max-time 60 "$installer_url" -o "$tmp_installer"; then
            rm -f "$tmp_installer"
            log_error "Failed to download installer (network timeout or error)"
            exit 1
        fi
    elif command -v wget >/dev/null 2>&1; then
        if ! wget --timeout=10 --tries=3 -qO "$tmp_installer" "$installer_url"; then
            rm -f "$tmp_installer"
            log_error "Failed to download installer (network timeout or error)"
            exit 1
        fi
    else
        rm -f "$tmp_installer"
        log_error "Please install curl or wget to update Mole"
        exit 1
    fi

    chmod +x "$tmp_installer"

    # Determine install directory
    local mole_path
    mole_path="$(command -v mole 2>/dev/null || echo "$0")"
    local install_dir
    install_dir="$(cd "$(dirname "$mole_path")" && pwd)"

    # Run installer
    if "$tmp_installer" --prefix "$install_dir" --config "$HOME/.config/mole" --update 2>/dev/null; then
        log_success "Mole updated successfully"
    else
        log_warning "Update failed, trying reinstall..."
        if "$tmp_installer" --prefix "$install_dir" --config "$HOME/.config/mole"; then
            log_success "Mole reinstalled successfully"
        else
            rm -f "$tmp_installer"
            log_error "Update failed"
            exit 1
        fi
    fi

    rm -f "$tmp_installer"
}

# Display main menu options
show_main_menu() {
    local selected="${1:-1}"
    local full_draw="${2:-true}"

    if [[ "$full_draw" == "true" ]]; then
        clear_screen
        echo ""
        show_brand_banner
        echo ""
        printf '\033[s'
    else
        printf '\033[u\033[0J'
    fi

    show_menu_option 1 "Clean System - Remove junk files and optimize" "$([[ $selected -eq 1 ]] && echo true || echo false)"
    show_menu_option 2 "Uninstall Apps - Remove applications completely" "$([[ $selected -eq 2 ]] && echo true || echo false)"
    show_menu_option 3 "Help & Information - Usage guide and tips" "$([[ $selected -eq 3 ]] && echo true || echo false)"
    show_menu_option 4 "Exit - Close Mole" "$([[ $selected -eq 4 ]] && echo true || echo false)"

    if [[ -t 0 ]]; then
        echo ""
        echo -e "${BLUE}↑/↓ to navigate, ENTER to select, Q to quit${NC}"
    fi
}

# Interactive main menu loop
interactive_main_menu() {
    maybe_show_intro() {
        if [[ ! -t 1 ]]; then
            return
        fi

        local tty_name
        tty_name=$(tty 2>/dev/null || echo "")

        if [[ -n "$tty_name" ]]; then
            local sanitized
            sanitized=$(echo "$tty_name" | tr -c '[:alnum:]_' '_')
            local flag_file="/tmp/mole_intro_${sanitized}"
            if [[ -f "$flag_file" ]]; then
                return
            fi
            animate_mole_intro
            touch "$flag_file" 2>/dev/null || true
        else
            if [[ -z "${MOLE_INTRO_SHOWN:-}" ]]; then
                animate_mole_intro
                export MOLE_INTRO_SHOWN=1
            fi
        fi
    }

    maybe_show_intro
    local current_option=1
    local first_draw=true
    cleanup_and_exit() {
        show_cursor
        echo ""
        echo "Thank you for using Mole!"
        exit 0
    }

    trap cleanup_and_exit INT
    hide_cursor

    while true; do
        show_main_menu $current_option "$first_draw"
        if [[ "$first_draw" == "true" ]]; then
            first_draw=false
        fi

        local key=$(read_key)
        [[ $? -ne 0 ]] && continue

        case "$key" in
            "UP") ((current_option > 1)) && ((current_option--)) ;;
            "DOWN") ((current_option < 4)) && ((current_option++)) ;;
            "ENTER"|"$current_option")
                show_cursor
                case $current_option in
                    1)
                        exec "$SCRIPT_DIR/bin/clean.sh"
                        ;;
                    2) exec "$SCRIPT_DIR/bin/uninstall.sh" ;;
                    3) clear; show_help; exit 0 ;;
                    4) cleanup_and_exit ;;
                esac
                ;;
            "QUIT") cleanup_and_exit ;;
            [1-4])
                show_cursor
                case $key in
                    1)
                        exec "$SCRIPT_DIR/bin/clean.sh"
                        ;;
                    2) exec "$SCRIPT_DIR/bin/uninstall.sh" ;;
                    3) clear; show_help; exit 0 ;;
                    4) cleanup_and_exit ;;
                esac
                ;;
        esac
    done
}

main() {
    # Check for updates (non-blocking, won't delay startup)
    check_for_updates

    case "${1:-""}" in
        "clean")
            exec "$SCRIPT_DIR/bin/clean.sh" "${@:2}"
            ;;
        "uninstall")
            exec "$SCRIPT_DIR/bin/uninstall.sh"
            ;;
        "update")
            update_mole
            exit 0
            ;;
        "help"|"--help"|"-h")
            show_help
            exit 0
            ;;
        "version"|"--version"|"-V")
            show_version
            exit 0
            ;;
        "")
            interactive_main_menu
            ;;
        *)
            echo "Unknown command: $1"
            echo "Use 'mole --help' for usage information."
            exit 1
            ;;
    esac
}

main "$@"