#!/bin/bash
# Mole - Main Entry Point
# A comprehensive macOS maintenance tool
#
# Clean - Remove junk files and optimize system
# Uninstall - Remove applications completely
# Analyze - Interactive disk space explorer
#
# Usage:
#   ./mole                         # Interactive main menu
#   ./mole clean                   # Direct clean mode
#   ./mole uninstall               # Direct uninstall mode
#   ./mole analyze                 # Disk space explorer
#   ./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="1.7.1"
MOLE_TAGLINE="can dig deep to clean your Mac."

# Check for updates (non-blocking, cached)
check_for_updates() {
    local cache="$HOME/.cache/mole/version_check"
    local msg_cache="$HOME/.cache/mole/update_message"
    mkdir -p "$(dirname "$cache")" 2>/dev/null

    # Skip if checked within 24 hours
    if [[ -f "$cache" ]]; then
        local age=$(($(date +%s) - $(stat -f%m "$cache" 2>/dev/null || echo 0)))
        [[ $age -lt 86400 ]] && return
    fi

    # Background version check (save to file, don't output)
    (
        local latest=$(curl -fsSL --connect-timeout 2 --max-time 3 -H "Cache-Control: no-cache" \
            "https://raw.githubusercontent.com/tw93/mole/main/mole" 2>/dev/null | \
            grep '^VERSION=' | head -1 | sed 's/VERSION="\(.*\)"/\1/')

        if [[ -n "$latest" && "$VERSION" != "$latest" && "$(printf '%s\n' "$VERSION" "$latest" | sort -V | head -1)" == "$VERSION" ]]; then
            echo -e "${YELLOW}New version ${GREEN}${latest}${YELLOW} available (current: ${VERSION})\n   Run ${GREEN}mole update${YELLOW} to upgrade${NC}" > "$msg_cache"
        else
            echo -n > "$msg_cache"
        fi
        touch "$cache" 2>/dev/null
    ) &
    disown 2>/dev/null || true
}

# Show update notification if available
show_update_notification() {
    local msg_cache="$HOME/.cache/mole/update_message"
    if [[ -f "$msg_cache" && -s "$msg_cache" ]]; then
        cat "$msg_cache"
        echo
    fi
}

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'
    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" "$BLUE" "COMMANDS" "$NC"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo" "$NC" "Interactive main menu"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo clean" "$NC" "Deeper system cleanup"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo clean --dry-run" "$NC" "Preview cleanup (no deletions)"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo clean --whitelist" "$NC" "Manage protected caches"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo uninstall" "$NC" "Remove applications completely"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo analyze" "$NC" "Interactive disk space explorer"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo update" "$NC" "Update Mole to the latest version"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo remove" "$NC" "Remove Mole from the system"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo --version" "$NC" "Show installed version"
    printf "  %s%-28s%s %s\n" "$GREEN" "mo --help" "$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() {
    # Check if installed via Homebrew
    if command -v brew >/dev/null 2>&1 && brew list mole >/dev/null 2>&1; then
        update_via_homebrew "$VERSION"
        exit 0
    fi

    # Download and run installer with progress
    if [[ -t 1 ]]; then
        start_inline_spinner "Downloading latest version..."
    else
        echo "Downloading latest version..."
    fi

    local installer_url="https://raw.githubusercontent.com/tw93/mole/main/install.sh"
    local tmp_installer
    tmp_installer="$(mktemp_file)" || { log_error "Update failed"; exit 1; }

    # Download installer with progress
    if command -v curl >/dev/null 2>&1; then
        if ! curl -fsSL --connect-timeout 10 --max-time 60 "$installer_url" -o "$tmp_installer" 2>&1; then
            if [[ -t 1 ]]; then stop_inline_spinner; fi
            rm -f "$tmp_installer"
            log_error "Update failed. Check network connection."
            exit 1
        fi
    elif command -v wget >/dev/null 2>&1; then
        if ! wget --timeout=10 --tries=3 -qO "$tmp_installer" "$installer_url" 2>&1; then
            if [[ -t 1 ]]; then stop_inline_spinner; fi
            rm -f "$tmp_installer"
            log_error "Update failed. Check network connection."
            exit 1
        fi
    else
        if [[ -t 1 ]]; then stop_inline_spinner; fi
        rm -f "$tmp_installer"
        log_error "curl or wget required"
        exit 1
    fi

    if [[ -t 1 ]]; then stop_inline_spinner; 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)"

    if [[ -t 1 ]]; then
        start_inline_spinner "Installing update..."
    else
        echo "Installing update..."
    fi

    # Run installer with visible output (but capture for error handling)
    local install_output
    if install_output=$("$tmp_installer" --prefix "$install_dir" --config "$HOME/.config/mole" --update 2>&1); then
        if [[ -t 1 ]]; then stop_inline_spinner; fi
        echo "$install_output" | grep -Ev "^$" || true
        # Only show success message if not already shown by installer
        if ! echo "$install_output" | grep -q "Already on latest version"; then
            local new_version
            new_version=$("$mole_path" --version 2>/dev/null | awk 'NF {print $NF}' || echo "")
            echo -e "${GREEN}✓${NC} Updated to latest version (${new_version:-unknown})"
        fi
    else
        # Retry without --update flag
        if install_output=$("$tmp_installer" --prefix "$install_dir" --config "$HOME/.config/mole" 2>&1); then
            if [[ -t 1 ]]; then stop_inline_spinner; fi
            echo "$install_output" | grep -Ev "^$" || true
            if ! echo "$install_output" | grep -q "Already on latest version"; then
                local new_version
                new_version=$("$mole_path" --version 2>/dev/null | awk 'NF {print $NF}' || echo "")
                echo -e "${GREEN}✓${NC} Updated to latest version (${new_version:-unknown})"
            fi
        else
            if [[ -t 1 ]]; then stop_inline_spinner; fi
            rm -f "$tmp_installer"
            log_error "Update failed"
            echo "$install_output" | tail -10 >&2  # Show last 10 lines of error
            exit 1
        fi
    fi

    rm -f "$tmp_installer"
    rm -f "$HOME/.cache/mole/version_check" "$HOME/.cache/mole/update_message"
}

# Remove Mole from system
remove_mole() {
    clear
    echo ""
    echo -e "${YELLOW}Remove Mole${NC}"
    echo ""

    # Detect all installations with loading
    if [[ -t 1 ]]; then
        start_inline_spinner "Detecting Mole installations..."
    else
        echo "Detecting installations..."
    fi

    local is_homebrew=false
    local -a manual_installs=()
    local -a alias_installs=()

    # Check Homebrew
    if command -v brew >/dev/null 2>&1 && brew list mole >/dev/null 2>&1; then
        is_homebrew=true
    fi

    # Check common manual install locations
    local -a common_paths=(
        "/usr/local/bin/mole"
        "$HOME/.local/bin/mole"
        "/opt/local/bin/mole"
    )

    for path in "${common_paths[@]}"; do
        if [[ -f "$path" ]]; then
            # Check if it's not a Homebrew symlink
            if [[ ! -L "$path" ]] || ! readlink "$path" | grep -q "Cellar/mole"; then
                manual_installs+=("$path")
            fi
        fi
    done

    local -a alias_candidates=(
        "/usr/local/bin/mo"
        "$HOME/.local/bin/mo"
        "/opt/local/bin/mo"
    )

    for alias in "${alias_candidates[@]}"; do
        if [[ -f "$alias" ]]; then
            alias_installs+=("$alias")
        fi
    done

    if [[ -t 1 ]]; then
        stop_inline_spinner
    fi

    # Check if anything to remove
    if [[ "$is_homebrew" == "false" && ${#manual_installs[@]} -eq 0 && ${#alias_installs[@]} -eq 0 ]]; then
        echo ""
        echo -e "${YELLOW}No Mole installation detected${NC}"
        exit 0
    fi

    # Show what will be removed
    echo "Will remove:"
    echo ""

    if [[ "$is_homebrew" == "true" ]]; then
        echo "  - Mole via Homebrew"
    fi

    for install in "${manual_installs[@]}" "${alias_installs[@]}"; do
        echo "  - $install"
    done

    echo "  - ~/.config/mole"
    echo "  - ~/.cache/mole"

    echo ""
    echo -n "Press Enter to confirm, ESC or q to cancel: "

    # Read single key
    IFS= read -r -s -n1 key || key=""
    echo ""
    case "$key" in
        $'\e'|q|Q)
            echo "Cancelled"
            exit 0
            ;;
        ""|$'\n'|$'\r')
            # Continue with removal
            ;;
        *)
            echo "Cancelled"
            exit 0
            ;;
    esac

    echo ""

    # Remove Homebrew installation
    if [[ "$is_homebrew" == "true" ]]; then
        if brew uninstall mole 2>&1 | grep -q "Uninstalling"; then
            log_success "Uninstalled via Homebrew"
        else
            log_error "Failed to uninstall via Homebrew"
            echo "Try manually: brew uninstall mole"
        fi
    fi

    # Remove manual installations
    if [[ ${#manual_installs[@]} -gt 0 ]]; then
        for install in "${manual_installs[@]}"; do
            if [[ -f "$install" ]]; then
                if rm -f "$install" 2>/dev/null; then
                    log_success "Removed: $install"
                else
                    log_error "Failed to remove $install (try with sudo)"
                fi
            fi
        done
    fi

    if [[ ${#alias_installs[@]} -gt 0 ]]; then
        for alias in "${alias_installs[@]}"; do
            if [[ -f "$alias" ]]; then
                if rm -f "$alias" 2>/dev/null; then
                    log_success "Removed alias: $alias"
                else
                    log_warning "Could not remove alias $alias (may need sudo)"
                fi
            fi
        done
    fi

    # Clean up cache first (logs to config)
    if [[ -d "$HOME/.cache/mole" ]]; then
        rm -rf "$HOME/.cache/mole" 2>/dev/null && log_success "Removed cache"
    fi

    # Clean up configuration last (contains logs)
    if [[ -d "$HOME/.config/mole" ]]; then
        log_success "Removed configuration"
        rm -rf "$HOME/.config/mole" 2>/dev/null
    fi

    echo ""
    echo -e "${GREEN}Mole has been removed successfully${NC}"
    echo ""
    echo "Thank you for using Mole!"

    exit 0
}

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

    # Full redraw each time (prevents ghost menu items)
    clear_screen
    echo ""
    show_brand_banner
    show_update_notification
    echo ""

    show_menu_option 1 "Clean Mac - Remove junk files and optimize" "$([[ $selected -eq 1 ]] && echo true || echo false)"
    show_menu_option 2 "Uninstall Apps - Remove applications completely" "$([[ $selected -eq 2 ]] && echo true || echo false)"
    show_menu_option 3 "Analyze Disk - Interactive space explorer" "$([[ $selected -eq 3 ]] && echo true || echo false)"
    show_menu_option 4 "Help & Information - Usage guide and tips" "$([[ $selected -eq 4 ]] && echo true || echo false)"
    show_menu_option 5 "Exit - Close Mole" "$([[ $selected -eq 5 ]] && echo true || echo false)"

    if [[ -t 0 ]]; then
        echo ""
        echo -e "  ${GRAY}↑/↓${NC} Navigate  ${GRAY}|${NC}  ${GRAY}Enter${NC} Select  ${GRAY}|${NC}  ${GRAY}Q/ESC${NC} Quit"
    fi
}

# Interactive main menu loop
interactive_main_menu() {
    # Show intro animation only once per terminal tab
    if [[ -t 1 ]]; then
        local tty_name=$(tty 2>/dev/null || echo "")
        if [[ -n "$tty_name" ]]; then
            local flag_file="/tmp/mole_intro_$(echo "$tty_name" | tr -c '[:alnum:]_' '_')"
            if [[ ! -f "$flag_file" ]]; then
                animate_mole_intro
                touch "$flag_file" 2>/dev/null || true
            fi
        fi
    fi
    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

        # Drain any pending input to prevent touchpad scroll issues
        drain_pending_input

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

        case "$key" in
            "UP") ((current_option > 1)) && ((current_option--)) ;;
            "DOWN") ((current_option < 5)) && ((current_option++)) ;;
            "ENTER"|"$current_option")
                show_cursor
                case $current_option in
                    1)
                        exec "$SCRIPT_DIR/bin/clean.sh"
                        ;;
                    2) exec "$SCRIPT_DIR/bin/uninstall.sh" ;;
                    3) exec "$SCRIPT_DIR/bin/analyze.sh" ;;
                    4) clear; show_help; exit 0 ;;
                    5) cleanup_and_exit ;;
                esac
                ;;
            "QUIT") cleanup_and_exit ;;
            [1-5])
                show_cursor
                case $key in
                    1)
                        exec "$SCRIPT_DIR/bin/clean.sh"
                        ;;
                    2) exec "$SCRIPT_DIR/bin/uninstall.sh" ;;
                    3) exec "$SCRIPT_DIR/bin/analyze.sh" ;;
                    4) clear; show_help; exit 0 ;;
                    5) cleanup_and_exit ;;
                esac
                ;;
        esac
    done
}

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

main "$@"