#!/opt/local/bin/bash
# Mole - Clean command.
# Runs cleanup modules with optional sudo.
# Supports dry-run and whitelist.

set -euo pipefail

export LC_ALL=C
export LANG=C

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../lib/core/common.sh"

source "$SCRIPT_DIR/../lib/core/sudo.sh"
source "$SCRIPT_DIR/../lib/clean/brew.sh"
source "$SCRIPT_DIR/../lib/clean/caches.sh"
source "$SCRIPT_DIR/../lib/clean/apps.sh"
source "$SCRIPT_DIR/../lib/clean/dev.sh"
source "$SCRIPT_DIR/../lib/clean/app_caches.sh"
source "$SCRIPT_DIR/../lib/clean/hints.sh"
source "$SCRIPT_DIR/../lib/clean/system.sh"
source "$SCRIPT_DIR/../lib/clean/user.sh"

SYSTEM_CLEAN=false
DRY_RUN=false
PROTECT_FINDER_METADATA=false
EXTERNAL_VOLUME_TARGET=""
IS_M_SERIES=$([[ "$(uname -m)" == "arm64" ]] && echo "true" || echo "false")

EXPORT_LIST_FILE="$HOME/.config/mole/clean-list.txt"
CURRENT_SECTION=""
readonly PROTECTED_SW_DOMAINS=(
    # Web editors
    "capcut.com"
    "photopea.com"
    "pixlr.com"
    # Google Workspace (offline mode)
    "docs.google.com"
    "sheets.google.com"
    "slides.google.com"
    "drive.google.com"
    "mail.google.com"
    # Code platforms (offline/PWA)
    "github.com"
    "gitlab.com"
    "codepen.io"
    "codesandbox.io"
    "replit.com"
    "stackblitz.com"
    # Collaboration tools (offline/PWA)
    "notion.so"
    "figma.com"
    "linear.app"
    "excalidraw.com"
)

declare -a WHITELIST_PATTERNS=()
WHITELIST_WARNINGS=()
if [[ -f "$HOME/.config/mole/whitelist" ]]; then
    while IFS= read -r line; do
        # shellcheck disable=SC2295
        line="${line#"${line%%[![:space:]]*}"}"
        # shellcheck disable=SC2295
        line="${line%"${line##*[![:space:]]}"}"
        [[ -z "$line" || "$line" =~ ^# ]] && continue

        [[ "$line" == ~* ]] && line="${line/#~/$HOME}"
        line="${line//\$HOME/$HOME}"
        line="${line//\$\{HOME\}/$HOME}"
        if [[ "$line" =~ \.\. ]]; then
            WHITELIST_WARNINGS+=("Path traversal not allowed: $line")
            continue
        fi

        if [[ "$line" != "$FINDER_METADATA_SENTINEL" ]]; then
            if [[ ! "$line" =~ ^[a-zA-Z0-9/_.@\ *-]+$ ]]; then
                WHITELIST_WARNINGS+=("Invalid path format: $line")
                continue
            fi

            if [[ "$line" != /* ]]; then
                WHITELIST_WARNINGS+=("Must be absolute path: $line")
                continue
            fi
        fi

        if [[ "$line" =~ // ]]; then
            WHITELIST_WARNINGS+=("Consecutive slashes: $line")
            continue
        fi

        case "$line" in
            / | /System | /System/* | /bin | /bin/* | /sbin | /sbin/* | /usr/bin | /usr/bin/* | /usr/sbin | /usr/sbin/* | /etc | /etc/* | /var/db | /var/db/*)
                WHITELIST_WARNINGS+=("Protected system path: $line")
                continue
                ;;
        esac

        duplicate="false"
        if [[ ${#WHITELIST_PATTERNS[@]} -gt 0 ]]; then
            for existing in "${WHITELIST_PATTERNS[@]}"; do
                if [[ "$line" == "$existing" ]]; then
                    duplicate="true"
                    break
                fi
            done
        fi
        [[ "$duplicate" == "true" ]] && continue
        WHITELIST_PATTERNS+=("$line")
    done < "$HOME/.config/mole/whitelist"
else
    WHITELIST_PATTERNS=("${DEFAULT_WHITELIST_PATTERNS[@]}")
fi

# Expand whitelist patterns once to avoid repeated tilde expansion in hot loops.
expand_whitelist_patterns() {
    if [[ ${#WHITELIST_PATTERNS[@]} -gt 0 ]]; then
        local -a EXPANDED_PATTERNS
        EXPANDED_PATTERNS=()
        for pattern in "${WHITELIST_PATTERNS[@]}"; do
            local expanded="${pattern/#\~/$HOME}"
            EXPANDED_PATTERNS+=("$expanded")
        done
        WHITELIST_PATTERNS=("${EXPANDED_PATTERNS[@]}")
    fi
}
expand_whitelist_patterns

if [[ ${#WHITELIST_PATTERNS[@]} -gt 0 ]]; then
    for entry in "${WHITELIST_PATTERNS[@]}"; do
        if [[ "$entry" == "$FINDER_METADATA_SENTINEL" ]]; then
            PROTECT_FINDER_METADATA=true
            break
        fi
    done
fi

# Section tracking and summary counters.
total_items=0
TRACK_SECTION=0
SECTION_ACTIVITY=0
files_cleaned=0
total_size_cleaned=0
whitelist_skipped_count=0
PROJECT_ARTIFACT_HINT_DETECTED=false
PROJECT_ARTIFACT_HINT_COUNT=0
PROJECT_ARTIFACT_HINT_TRUNCATED=false
PROJECT_ARTIFACT_HINT_EXAMPLES=()
PROJECT_ARTIFACT_HINT_ESTIMATED_KB=0
PROJECT_ARTIFACT_HINT_ESTIMATE_SAMPLES=0
PROJECT_ARTIFACT_HINT_ESTIMATE_PARTIAL=false
declare -a DRY_RUN_SEEN_IDENTITIES=()

# shellcheck disable=SC2329
note_activity() {
    if [[ "${TRACK_SECTION:-0}" == "1" ]]; then
        SECTION_ACTIVITY=1
    fi
}

# shellcheck disable=SC2329
register_dry_run_cleanup_target() {
    local path="$1"
    local identity
    identity=$(mole_path_identity "$path")

    if [[ ${#DRY_RUN_SEEN_IDENTITIES[@]} -gt 0 ]] && mole_identity_in_list "$identity" "${DRY_RUN_SEEN_IDENTITIES[@]}"; then
        return 1
    fi

    DRY_RUN_SEEN_IDENTITIES+=("$identity")
    return 0
}

CLEANUP_DONE=false
# shellcheck disable=SC2329
cleanup() {
    local signal="${1:-EXIT}"
    local exit_code="${2:-$?}"

    if [[ "$CLEANUP_DONE" == "true" ]]; then
        return 0
    fi
    CLEANUP_DONE=true

    stop_inline_spinner 2> /dev/null || true

    cleanup_temp_files

    stop_sudo_session

    show_cursor
}

trap 'cleanup EXIT $?' EXIT
trap 'cleanup INT 130; exit 130' INT
trap 'cleanup TERM 143; exit 143' TERM

start_section() {
    TRACK_SECTION=1
    SECTION_ACTIVITY=0
    CURRENT_SECTION="$1"
    echo ""
    echo -e "${PURPLE_BOLD}${ICON_ARROW} $1${NC}"

    if [[ "$DRY_RUN" == "true" ]]; then
        ensure_user_file "$EXPORT_LIST_FILE"
        echo "" >> "$EXPORT_LIST_FILE"
        echo "=== $1 ===" >> "$EXPORT_LIST_FILE"
    fi
}

end_section() {
    stop_section_spinner

    if [[ "${TRACK_SECTION:-0}" == "1" && "${SECTION_ACTIVITY:-0}" == "0" ]]; then
        echo -e "  ${GREEN}${ICON_SUCCESS}${NC} Nothing to clean"
    fi
    TRACK_SECTION=0
}

# shellcheck disable=SC2329
normalize_paths_for_cleanup() {
    local -a input_paths=("$@")

    # Fast path for large batches: O(n log n) via sort|awk instead of O(n²) bash loops.
    # Lex sort guarantees every parent path precedes its children, so a single-pass
    # awk can filter child paths by tracking only the last kept path.
    if [[ ${#input_paths[@]} -gt 500 ]]; then
        printf '%s\n' "${input_paths[@]}" |
            awk '{sub(/\/$/, ""); if ($0 != "") print}' |
            LC_ALL=C sort -u |
            awk 'BEGIN { last = "" } {
                if (last != "" && substr($0, 1, length(last) + 1) == last "/") next
                last = $0; print
            }'
        return
    fi

    local -a unique_paths=()

    for path in "${input_paths[@]}"; do
        local normalized="${path%/}"
        [[ -z "$normalized" ]] && normalized="$path"
        local found=false
        if [[ ${#unique_paths[@]} -gt 0 ]]; then
            for existing in "${unique_paths[@]}"; do
                if [[ "$existing" == "$normalized" ]]; then
                    found=true
                    break
                fi
            done
        fi
        [[ "$found" == "true" ]] || unique_paths+=("$normalized")
    done

    local sorted_paths
    if [[ ${#unique_paths[@]} -gt 0 ]]; then
        sorted_paths=$(printf '%s\n' "${unique_paths[@]}" | awk '{print length "|" $0}' | LC_ALL=C sort -n | cut -d'|' -f2-)
    else
        sorted_paths=""
    fi

    local -a result_paths=()
    while IFS= read -r path; do
        [[ -z "$path" ]] && continue
        local is_child=false
        if [[ ${#result_paths[@]} -gt 0 ]]; then
            for kept in "${result_paths[@]}"; do
                if [[ "$path" == "$kept" || "$path" == "$kept"/* ]]; then
                    is_child=true
                    break
                fi
            done
        fi
        [[ "$is_child" == "true" ]] || result_paths+=("$path")
    done <<< "$sorted_paths"

    if [[ ${#result_paths[@]} -gt 0 ]]; then
        printf '%s\n' "${result_paths[@]}"
    fi
}

# shellcheck disable=SC2329
get_cleanup_path_size_kb() {
    local path="$1"

    if [[ -f "$path" && ! -L "$path" ]]; then
        if command -v stat > /dev/null 2>&1; then
            local bytes
            bytes=$(stat -f%z "$path" 2> /dev/null || echo "0")
            if [[ "$bytes" =~ ^[0-9]+$ && "$bytes" -gt 0 ]]; then
                echo $(((bytes + 1023) / 1024))
                return 0
            fi
        fi
    fi

    if [[ -L "$path" ]]; then
        if command -v stat > /dev/null 2>&1; then
            local bytes
            bytes=$(stat -f%z "$path" 2> /dev/null || echo "0")
            if [[ "$bytes" =~ ^[0-9]+$ && "$bytes" -gt 0 ]]; then
                echo $(((bytes + 1023) / 1024))
            else
                echo 0
            fi
            return 0
        fi
    fi

    get_path_size_kb "$path"
}

# Classification helper for cleanup risk levels
# shellcheck disable=SC2329
classify_cleanup_risk() {
    local description="$1"
    local path="${2:-}"

    # HIGH RISK: System files, preference files, require sudo
    if [[ "$description" =~ [Ss]ystem || "$description" =~ [Ss]udo || "$path" =~ ^/System || "$path" =~ ^/Library ]]; then
        echo "HIGH|System files or requires admin access"
        return
    fi

    # HIGH RISK: Preference files that might affect app functionality
    if [[ "$description" =~ [Pp]reference || "$path" =~ /Preferences/ ]]; then
        echo "HIGH|Preference files may affect app settings"
        return
    fi

    # MEDIUM RISK: Installers, large files, app bundles
    if [[ "$description" =~ [Ii]nstaller || "$description" =~ [Aa]pp.*[Bb]undle || "$description" =~ [Ll]arge ]]; then
        echo "MEDIUM|Installer packages or app data"
        return
    fi

    # MEDIUM RISK: Old backups, downloads
    if [[ "$description" =~ [Bb]ackup || "$description" =~ [Dd]ownload || "$description" =~ [Oo]rphan ]]; then
        echo "MEDIUM|Backup or downloaded files"
        return
    fi

    # LOW RISK: Caches, logs, temporary files (automatically regenerated)
    if [[ "$description" =~ [Cc]ache || "$description" =~ [Ll]og || "$description" =~ [Tt]emp || "$description" =~ [Tt]humbnail ]]; then
        echo "LOW|Cache/log files, automatically regenerated"
        return
    fi

    # DEFAULT: MEDIUM
    echo "MEDIUM|User data files"
}

# shellcheck disable=SC2329
safe_clean() {
    if [[ $# -eq 0 ]]; then
        return 0
    fi

    local description
    local -a targets

    if [[ $# -eq 1 ]]; then
        description="$1"
        targets=("$1")
    else
        description="${*: -1}"
        targets=("${@:1:$#-1}")
    fi

    local -a valid_targets=()
    for target in "${targets[@]}"; do
        # Optimization: If target is a glob literal and parent dir missing, skip it.
        if [[ "$target" == *"*"* && ! -e "$target" ]]; then
            local base_path="${target%%\**}"
            local parent_dir
            if [[ "$base_path" == */ ]]; then
                parent_dir="${base_path%/}"
            else
                parent_dir=$(dirname "$base_path")
            fi

            if [[ ! -d "$parent_dir" ]]; then
                # debug_log "Skipping nonexistent parent: $parent_dir for $target"
                continue
            fi
        fi
        valid_targets+=("$target")
    done

    if [[ ${#valid_targets[@]} -gt 0 ]]; then
        targets=("${valid_targets[@]}")
    else
        targets=()
    fi
    if [[ ${#targets[@]} -eq 0 ]]; then
        return 0
    fi

    local removed_any=0
    local total_size_kb=0
    local total_count=0
    local skipped_count=0
    local removal_failed_count=0
    local permission_start=${MOLE_PERMISSION_DENIED_COUNT:-0}

    local show_scan_feedback=false
    if [[ ${#targets[@]} -gt 20 && -t 1 ]]; then
        show_scan_feedback=true
        stop_section_spinner
        MOLE_SPINNER_PREFIX="  " start_inline_spinner "Scanning ${#targets[@]} items..."
    fi

    local -a existing_paths=()
    for path in "${targets[@]}"; do
        local skip=false

        if should_protect_path "$path"; then
            skip=true
            skipped_count=$((skipped_count + 1))
            log_operation "clean" "SKIPPED" "$path" "protected"
        fi

        [[ "$skip" == "true" ]] && continue

        if is_path_whitelisted "$path"; then
            skip=true
            skipped_count=$((skipped_count + 1))
            log_operation "clean" "SKIPPED" "$path" "whitelist"
        fi
        [[ "$skip" == "true" ]] && continue
        if [[ -e "$path" ]]; then
            if [[ "$DRY_RUN" == "true" ]]; then
                register_dry_run_cleanup_target "$path" || continue
            fi
            existing_paths+=("$path")
        fi
    done

    if [[ "$show_scan_feedback" == "true" ]]; then
        stop_section_spinner
    fi

    debug_log "Cleaning: $description, ${#existing_paths[@]} items"

    # Enhanced debug output with risk level and details
    if [[ "${MO_DEBUG:-}" == "1" && ${#existing_paths[@]} -gt 0 ]]; then
        # Determine risk level for this cleanup operation
        local risk_info
        risk_info=$(classify_cleanup_risk "$description" "${existing_paths[0]}")
        local risk_level="${risk_info%%|*}"
        local risk_reason="${risk_info#*|}"

        debug_operation_start "$description"
        debug_risk_level "$risk_level" "$risk_reason"
        debug_operation_detail "Item count" "${#existing_paths[@]}"

        # Log sample of files (first 10) with details
        if [[ ${#existing_paths[@]} -le 10 ]]; then
            debug_operation_detail "Files to be removed" "All files listed below"
        else
            debug_operation_detail "Files to be removed" "Showing first 10 of ${#existing_paths[@]} files"
        fi
    fi

    if [[ $skipped_count -gt 0 ]]; then
        whitelist_skipped_count=$((whitelist_skipped_count + skipped_count))
    fi

    if [[ ${#existing_paths[@]} -eq 0 ]]; then
        return 0
    fi

    if [[ ${#existing_paths[@]} -gt 1 ]]; then
        local -a normalized_paths=()
        while IFS= read -r path; do
            [[ -n "$path" ]] && normalized_paths+=("$path")
        done < <(normalize_paths_for_cleanup "${existing_paths[@]}")

        if [[ ${#normalized_paths[@]} -gt 0 ]]; then
            existing_paths=("${normalized_paths[@]}")
        else
            existing_paths=()
        fi
    fi

    local show_spinner=false
    if [[ ${#existing_paths[@]} -gt 10 ]]; then
        show_spinner=true
        local total_paths=${#existing_paths[@]}
        if [[ -t 1 ]]; then MOLE_SPINNER_PREFIX="  " start_inline_spinner "Scanning items..."; fi
    fi

    local cleaning_spinner_started=false

    # For larger batches, precompute sizes in parallel for better UX/stat accuracy.
    if [[ ${#existing_paths[@]} -gt 3 ]]; then
        local temp_dir
        temp_dir=$(create_temp_dir)

        local dir_count=0
        local sample_size=$((${#existing_paths[@]} > 20 ? 20 : ${#existing_paths[@]}))
        local max_sample=$((${#existing_paths[@]} * 20 / 100))
        [[ $max_sample -gt $sample_size ]] && sample_size=$max_sample

        for ((i = 0; i < sample_size && i < ${#existing_paths[@]}; i++)); do
            [[ -d "${existing_paths[i]}" ]] && ((dir_count++))
        done

        # Heuristic: mostly files -> sequential stat is faster than subshells.
        if [[ $dir_count -lt 5 && ${#existing_paths[@]} -gt 20 ]]; then
            if [[ -t 1 && "$show_spinner" == "false" ]]; then
                MOLE_SPINNER_PREFIX="  " start_inline_spinner "Scanning items..."
                show_spinner=true
            fi

            local idx=0
            local last_progress_update
            last_progress_update=$(get_epoch_seconds)
            for path in "${existing_paths[@]}"; do
                local size
                size=$(get_cleanup_path_size_kb "$path")
                [[ ! "$size" =~ ^[0-9]+$ ]] && size=0

                if [[ "$size" -gt 0 ]]; then
                    echo "$size 1" > "$temp_dir/result_${idx}"
                else
                    echo "0 0" > "$temp_dir/result_${idx}"
                fi

                idx=$((idx + 1))
                if [[ $((idx % 20)) -eq 0 && "$show_spinner" == "true" && -t 1 ]]; then
                    update_progress_if_needed "$idx" "${#existing_paths[@]}" last_progress_update 1 || true
                    last_progress_update=$(get_epoch_seconds)
                fi
            done
        else
            local -a pids=()
            local idx=0
            local completed=0
            local last_progress_update
            last_progress_update=$(get_epoch_seconds)
            local total_paths=${#existing_paths[@]}

            if [[ ${#existing_paths[@]} -gt 0 ]]; then
                for path in "${existing_paths[@]}"; do
                    (
                        local size
                        size=$(get_cleanup_path_size_kb "$path")
                        [[ ! "$size" =~ ^[0-9]+$ ]] && size=0
                        local tmp_file="$temp_dir/result_${idx}.$$"
                        if [[ "$size" -gt 0 ]]; then
                            echo "$size 1" > "$tmp_file"
                        else
                            echo "0 0" > "$tmp_file"
                        fi
                        mv "$tmp_file" "$temp_dir/result_${idx}" 2> /dev/null || true
                    ) &
                    pids+=($!)
                    idx=$((idx + 1))

                    if ((${#pids[@]} >= MOLE_MAX_PARALLEL_JOBS)); then
                        wait "${pids[0]}" 2> /dev/null || true
                        pids=("${pids[@]:1}")
                        completed=$((completed + 1))

                        if [[ "$show_spinner" == "true" && -t 1 ]]; then
                            update_progress_if_needed "$completed" "$total_paths" last_progress_update 2 || true
                        fi
                    fi
                done
            fi

            if [[ ${#pids[@]} -gt 0 ]]; then
                for pid in "${pids[@]}"; do
                    wait "$pid" 2> /dev/null || true
                    completed=$((completed + 1))

                    if [[ "$show_spinner" == "true" && -t 1 ]]; then
                        update_progress_if_needed "$completed" "$total_paths" last_progress_update 2 || true
                    fi
                done
            fi
        fi

        # Read results back in original order.
        # Start spinner for cleaning phase
        if [[ "$DRY_RUN" != "true" && ${#existing_paths[@]} -gt 0 && -t 1 ]]; then
            MOLE_SPINNER_PREFIX="  " start_inline_spinner "Cleaning..."
            cleaning_spinner_started=true
        fi
        idx=0
        if [[ ${#existing_paths[@]} -gt 0 ]]; then
            for path in "${existing_paths[@]}"; do
                local result_file="$temp_dir/result_${idx}"
                if [[ -f "$result_file" ]]; then
                    read -r size count < "$result_file" 2> /dev/null || true
                    local removed=0
                    if [[ "$DRY_RUN" != "true" ]]; then
                        if safe_remove "$path" true; then
                            removed=1
                        fi
                    else
                        removed=1
                    fi

                    if [[ $removed -eq 1 ]]; then
                        if [[ "$size" -gt 0 ]]; then
                            total_size_kb=$((total_size_kb + size))
                        fi
                        total_count=$((total_count + 1))
                        removed_any=1
                    else
                        if [[ -e "$path" && "$DRY_RUN" != "true" ]]; then
                            removal_failed_count=$((removal_failed_count + 1))
                        fi
                    fi
                fi
                idx=$((idx + 1))
            done
        fi

    else
        # Start spinner for cleaning phase (small batch)
        if [[ "$DRY_RUN" != "true" && ${#existing_paths[@]} -gt 0 && -t 1 ]]; then
            MOLE_SPINNER_PREFIX="  " start_inline_spinner "Cleaning..."
            cleaning_spinner_started=true
        fi
        local idx=0
        if [[ ${#existing_paths[@]} -gt 0 ]]; then
            for path in "${existing_paths[@]}"; do
                local size_kb
                size_kb=$(get_cleanup_path_size_kb "$path")
                [[ ! "$size_kb" =~ ^[0-9]+$ ]] && size_kb=0

                local removed=0
                if [[ "$DRY_RUN" != "true" ]]; then
                    if safe_remove "$path" true; then
                        removed=1
                    fi
                else
                    removed=1
                fi

                if [[ $removed -eq 1 ]]; then
                    if [[ "$size_kb" -gt 0 ]]; then
                        total_size_kb=$((total_size_kb + size_kb))
                    fi
                    total_count=$((total_count + 1))
                    removed_any=1
                else
                    if [[ -e "$path" && "$DRY_RUN" != "true" ]]; then
                        removal_failed_count=$((removal_failed_count + 1))
                    fi
                fi
                idx=$((idx + 1))
            done
        fi
    fi

    if [[ "$show_spinner" == "true" || "$cleaning_spinner_started" == "true" ]]; then
        stop_inline_spinner
    fi

    local permission_end=${MOLE_PERMISSION_DENIED_COUNT:-0}
    # Track permission failures in debug output (avoid noisy user warnings).
    if [[ $permission_end -gt $permission_start && $removed_any -eq 0 ]]; then
        debug_log "Permission denied while cleaning: $description"
    fi
    if [[ $removal_failed_count -gt 0 && "$DRY_RUN" != "true" ]]; then
        debug_log "Skipped $removal_failed_count items, permission denied or in use, for: $description"
    fi

    if [[ $removed_any -eq 1 ]]; then
        # Stop spinner before output
        stop_section_spinner

        local size_human
        size_human=$(bytes_to_human "$((total_size_kb * 1024))")

        local label="$description"
        if [[ ${#targets[@]} -gt 1 ]]; then
            label+=" ${#targets[@]} items"
        fi

        if [[ "$DRY_RUN" == "true" ]]; then
            echo -e "  ${YELLOW}${ICON_DRY_RUN}${NC} $label${NC}, ${YELLOW}$size_human dry${NC}"

            local paths_temp
            paths_temp=$(create_temp_file)

            idx=0
            if [[ ${#existing_paths[@]} -gt 0 ]]; then
                for path in "${existing_paths[@]}"; do
                    local size=0

                    if [[ -n "${temp_dir:-}" && -f "$temp_dir/result_${idx}" ]]; then
                        read -r size count < "$temp_dir/result_${idx}" 2> /dev/null || true
                    else
                        size=$(get_cleanup_path_size_kb "$path" 2> /dev/null || echo "0")
                    fi

                    [[ "$size" == "0" || -z "$size" ]] && {
                        idx=$((idx + 1))
                        continue
                    }

                    echo "$(dirname "$path")|$size|$path" >> "$paths_temp"
                    idx=$((idx + 1))
                done
            fi

            # Group dry-run paths by parent for a compact export list.
            if [[ -f "$paths_temp" && -s "$paths_temp" ]]; then
                sort -t'|' -k1,1 "$paths_temp" | awk -F'|' '
                {
                    parent = $1
                    size = $2
                    path = $3

                    parent_size[parent] += size
                    if (parent_count[parent] == 0) {
                        parent_first[parent] = path
                    }
                    parent_count[parent]++
                }
                END {
                    for (parent in parent_size) {
                        if (parent_count[parent] > 1) {
                            printf "%s|%d|%d\n", parent, parent_size[parent], parent_count[parent]
                        } else {
                            printf "%s|%d|1\n", parent_first[parent], parent_size[parent]
                        }
                    }
                }
                ' | while IFS='|' read -r display_path total_size child_count; do
                    local size_human
                    size_human=$(bytes_to_human "$((total_size * 1024))")
                    if [[ $child_count -gt 1 ]]; then
                        echo "$display_path  # $size_human, $child_count items" >> "$EXPORT_LIST_FILE"
                    else
                        echo "$display_path  # $size_human" >> "$EXPORT_LIST_FILE"
                    fi
                done
            fi
        else
            local line_color
            line_color=$(cleanup_result_color_kb "$total_size_kb")
            echo -e "  ${line_color}${ICON_SUCCESS}${NC} $label${NC}, ${line_color}$size_human${NC}"
        fi
        files_cleaned=$((files_cleaned + total_count))
        total_size_cleaned=$((total_size_cleaned + total_size_kb))
        total_items=$((total_items + 1))
        note_activity
    fi

    return 0
}

start_cleanup() {
    # Set current command for operation logging
    export MOLE_CURRENT_COMMAND="clean"
    log_operation_session_start "clean"
    DRY_RUN_SEEN_IDENTITIES=()

    if [[ -t 1 ]]; then
        printf '\033[2J\033[H'
    fi
    printf '\n'
    if [[ -n "$EXTERNAL_VOLUME_TARGET" ]]; then
        echo -e "${PURPLE_BOLD}Clean External Volume${NC}"
        echo -e "${GRAY}${EXTERNAL_VOLUME_TARGET}${NC}"
        echo ""

        if [[ "$DRY_RUN" == "true" ]]; then
            echo -e "${YELLOW}Dry Run Mode${NC}, Preview only, no deletions"
            echo ""
        fi
        SYSTEM_CLEAN=false
        return 0
    fi

    echo -e "${PURPLE_BOLD}Clean Your Mac${NC}"
    echo ""

    if [[ "$DRY_RUN" != "true" && -t 0 ]]; then
        echo -e "${GRAY}${ICON_WARNING} Use --dry-run to preview, --whitelist to manage protected paths${NC}"
    fi

    if [[ "$DRY_RUN" == "true" ]]; then
        echo -e "${YELLOW}Dry Run Mode${NC}, Preview only, no deletions"
        echo ""

        ensure_user_file "$EXPORT_LIST_FILE"
        cat > "$EXPORT_LIST_FILE" << EOF
# Mole Cleanup Preview - $(date '+%Y-%m-%d %H:%M:%S')
#
# How to protect files:
# 1. Copy any path below to ~/.config/mole/whitelist
# 2. Run: mo clean --whitelist
#
# Example:
#   /Users/*/Library/Caches/com.example.app
#

EOF

        # Preview system section when sudo is already cached (no password prompt).
        if has_sudo_session; then
            SYSTEM_CLEAN=true
            echo -e "${GREEN}${ICON_SUCCESS}${NC} Admin access available, system preview included"
            echo ""
        else
            SYSTEM_CLEAN=false
            echo -e "${GRAY}${ICON_WARNING} System caches need sudo, run ${NC}sudo -v && mo clean --dry-run${GRAY} for full preview${NC}"
            echo ""
        fi
        return
    fi

    if [[ -t 0 ]]; then
        if has_sudo_session; then
            SYSTEM_CLEAN=true
            echo -e "${GREEN}${ICON_SUCCESS}${NC} Admin access already available"
            echo ""
        else
            echo -ne "${PURPLE}${ICON_ARROW}${NC} System caches need sudo. ${GREEN}Enter${NC} continue, ${GRAY}Space${NC} skip: "

            local choice
            choice=$(read_key)

            # ESC/Q aborts, Space skips, Enter enables system cleanup.
            if [[ "$choice" == "QUIT" ]]; then
                echo -e " ${GRAY}Canceled${NC}"
                exit 0
            fi

            if [[ "$choice" == "SPACE" ]]; then
                echo -e " ${GRAY}Skipped${NC}"
                echo ""
                SYSTEM_CLEAN=false
            elif [[ "$choice" == "ENTER" ]]; then
                printf "\r\033[K" # Clear the prompt line
                if ensure_sudo_session "System cleanup requires admin access"; then
                    SYSTEM_CLEAN=true
                    echo -e "${GREEN}${ICON_SUCCESS}${NC} Admin access granted"
                    echo ""
                else
                    SYSTEM_CLEAN=false
                    echo ""
                    echo -e "${YELLOW}Authentication failed${NC}, continuing with user-level cleanup"
                fi
            else
                SYSTEM_CLEAN=false
                echo -e " ${GRAY}Skipped${NC}"
                echo ""
            fi
        fi
    else
        echo ""
        echo "Running in non-interactive mode"
        if has_sudo_session; then
            SYSTEM_CLEAN=true
            echo "  ${ICON_LIST} System-level cleanup enabled, sudo session active"
        else
            SYSTEM_CLEAN=false
            echo "  ${ICON_LIST} System-level cleanup skipped, requires sudo"
        fi
        echo "  ${ICON_LIST} User-level cleanup will proceed automatically"
        echo ""
    fi
}

perform_cleanup() {
    if [[ -n "$EXTERNAL_VOLUME_TARGET" ]]; then
        total_items=0
        files_cleaned=0
        total_size_cleaned=0
    fi

    # Test mode skips expensive scans and returns minimal output.
    local test_mode_enabled=false
    if [[ -z "$EXTERNAL_VOLUME_TARGET" && "${MOLE_TEST_MODE:-0}" == "1" ]]; then
        test_mode_enabled=true
        if [[ "$DRY_RUN" == "true" ]]; then
            echo -e "${YELLOW}Dry Run Mode${NC}, Preview only, no deletions"
            echo ""
        fi
        echo -e "${GREEN}${ICON_LIST}${NC} User app cache"
        if [[ ${#WHITELIST_PATTERNS[@]} -gt 0 ]]; then
            local -a expanded_defaults
            expanded_defaults=()
            for default in "${DEFAULT_WHITELIST_PATTERNS[@]}"; do
                expanded_defaults+=("${default/#\~/$HOME}")
            done
            local has_custom=false
            for pattern in "${WHITELIST_PATTERNS[@]}"; do
                local is_default=false
                local normalized_pattern="${pattern%/}"
                for default in "${expanded_defaults[@]}"; do
                    local normalized_default="${default%/}"
                    [[ "$normalized_pattern" == "$normalized_default" ]] && is_default=true && break
                done
                [[ "$is_default" == "false" ]] && has_custom=true && break
            done
            [[ "$has_custom" == "true" ]] && echo -e "${GREEN}${ICON_SUCCESS}${NC} Protected items found"
        fi
        if [[ "$DRY_RUN" == "true" ]]; then
            echo ""
            echo "Potential space: 0.00GB"
        fi
        total_items=1
        files_cleaned=0
        total_size_cleaned=0
    fi

    if [[ "$test_mode_enabled" == "false" && -z "$EXTERNAL_VOLUME_TARGET" ]]; then
        echo -e "${BLUE}${ICON_ADMIN}${NC} $(detect_architecture) | Free space: $(get_free_space)"
    fi

    if [[ "$test_mode_enabled" == "true" ]]; then
        local summary_heading="Test mode complete"
        local -a summary_details
        summary_details=()
        summary_details+=("Test mode - no actual cleanup performed")
        print_summary_block "$summary_heading" "${summary_details[@]}"
        printf '\n'
        return 0
    fi

    # Pre-check TCC permissions to avoid mid-run prompts.
    if [[ -z "$EXTERNAL_VOLUME_TARGET" ]]; then
        check_tcc_permissions
    fi

    if [[ ${#WHITELIST_PATTERNS[@]} -gt 0 ]]; then
        local predefined_count=0
        local custom_count=0

        for pattern in "${WHITELIST_PATTERNS[@]}"; do
            local is_predefined=false
            for default in "${DEFAULT_WHITELIST_PATTERNS[@]}"; do
                local expanded_default="${default/#\~/$HOME}"
                if [[ "$pattern" == "$expanded_default" ]]; then
                    is_predefined=true
                    break
                fi
            done

            if [[ "$is_predefined" == "true" ]]; then
                predefined_count=$((predefined_count + 1))
            else
                custom_count=$((custom_count + 1))
            fi
        done

        if [[ $custom_count -gt 0 || $predefined_count -gt 0 ]]; then
            local summary=""
            [[ $predefined_count -gt 0 ]] && summary+="$predefined_count core"
            [[ $custom_count -gt 0 && $predefined_count -gt 0 ]] && summary+=" + "
            [[ $custom_count -gt 0 ]] && summary+="$custom_count custom"
            summary+=" patterns active"

            echo -e "${BLUE}${ICON_SUCCESS}${NC} Whitelist: $summary"

            if [[ "$DRY_RUN" == "true" ]]; then
                for pattern in "${WHITELIST_PATTERNS[@]}"; do
                    [[ "$pattern" == "$FINDER_METADATA_SENTINEL" ]] && continue
                    echo -e "  ${GRAY}${ICON_SUBLIST}${NC} ${GRAY}${pattern}${NC}"
                done
            fi
        fi
    fi

    if [[ -t 1 && "$DRY_RUN" != "true" ]]; then
        local fda_status=0
        has_full_disk_access
        fda_status=$?
        if [[ $fda_status -eq 1 ]]; then
            echo ""
            echo -e "${GRAY}${ICON_REVIEW}${NC} ${GRAY}Grant Full Disk Access to your terminal in System Settings for best results${NC}"
        fi
    fi

    total_items=0
    files_cleaned=0
    total_size_cleaned=0

    local had_errexit=0
    [[ $- == *e* ]] && had_errexit=1

    # Allow per-section failures without aborting the full run.
    set +e

    if [[ -n "$EXTERNAL_VOLUME_TARGET" ]]; then
        start_section "External volume"
        clean_external_volume_target "$EXTERNAL_VOLUME_TARGET"
        end_section
    else
        # ===== 1. System =====
        if [[ "$SYSTEM_CLEAN" == "true" ]]; then
            start_section "System"
            clean_deep_system
            clean_local_snapshots
            end_section
        fi

        if [[ ${#WHITELIST_WARNINGS[@]} -gt 0 ]]; then
            echo ""
            for warning in "${WHITELIST_WARNINGS[@]}"; do
                echo -e "  ${GRAY}${ICON_WARNING}${NC} Whitelist: $warning"
            done
        fi

        # ===== 2. User essentials =====
        start_section "User essentials"
        clean_user_essentials
        clean_finder_metadata
        end_section

        # ===== 3. App caches (merged sandboxed and standard app caches) =====
        start_section "App caches"
        clean_app_caches
        end_section

        # ===== 4. Browsers =====
        start_section "Browsers"
        clean_browsers
        end_section

        # ===== 5. Cloud & Office =====
        start_section "Cloud & Office"
        clean_cloud_storage
        clean_office_applications
        end_section

        # ===== 6. Developer tools (merged CLI and GUI tooling) =====
        start_section "Developer tools"
        clean_developer_tools
        end_section

        # ===== 7. Applications =====
        start_section "Applications"
        clean_user_gui_applications
        end_section

        # ===== 8. Virtualization =====
        start_section "Virtualization"
        clean_virtualization_tools
        end_section

        # ===== 9. Application Support =====
        start_section "Application Support"
        clean_application_support_logs
        end_section

        # ===== 10. Orphaned data =====
        start_section "Orphaned data"
        clean_orphaned_app_data
        clean_orphaned_system_services
        show_user_launch_agent_hint_notice
        end_section

        # ===== 11. Apple Silicon =====
        clean_apple_silicon_caches

        # ===== 12. Device backups =====
        start_section "Device backups"
        check_ios_device_backups
        end_section

        # ===== 13. Time Machine =====
        start_section "Time Machine"
        clean_time_machine_failed_backups
        end_section

        # ===== 14. Large files =====
        start_section "Large files"
        check_large_file_candidates
        end_section

        # ===== 15. System Data clues =====
        start_section "System Data clues"
        show_system_data_hint_notice
        end_section

        # ===== 16. Project artifacts =====
        start_section "Project artifacts"
        show_project_artifact_hint_notice
        end_section
    fi

    # ===== Final summary =====
    echo ""

    local summary_heading=""
    local summary_status="success"
    if [[ "$DRY_RUN" == "true" ]]; then
        summary_heading="Dry run complete - no changes made"
    else
        summary_heading="Cleanup complete"
    fi

    local -a summary_details=()

    if [[ $total_size_cleaned -gt 0 ]]; then
        local freed_size_human
        freed_size_human=$(bytes_to_human_kb "$total_size_cleaned")

        if [[ "$DRY_RUN" == "true" ]]; then
            local stats="Potential space: ${GREEN}${freed_size_human}${NC}"
            [[ $files_cleaned -gt 0 ]] && stats+=" | Items: $files_cleaned"
            [[ $total_items -gt 0 ]] && stats+=" | Categories: $total_items"
            summary_details+=("$stats")

            {
                echo ""
                echo "# ============================================"
                echo "# Summary"
                echo "# ============================================"
                echo "# Potential cleanup: ${freed_size_human}"
                echo "# Items: $files_cleaned"
                echo "# Categories: $total_items"
            } >> "$EXPORT_LIST_FILE"

            summary_details+=("Detailed file list: ${GRAY}$EXPORT_LIST_FILE${NC}")
            summary_details+=("Use ${GRAY}mo clean --whitelist${NC} to add protection rules")
        else
            local summary_line="Space freed: ${GREEN}${freed_size_human}${NC}"

            if [[ $files_cleaned -gt 0 && $total_items -gt 0 ]]; then
                summary_line+=" | Items cleaned: $files_cleaned | Categories: $total_items"
            elif [[ $files_cleaned -gt 0 ]]; then
                summary_line+=" | Items cleaned: $files_cleaned"
            elif [[ $total_items -gt 0 ]]; then
                summary_line+=" | Categories: $total_items"
            fi

            summary_details+=("$summary_line")

            # Movie comparison only if >= 1GB
            if ((total_size_cleaned >= MOLE_ONE_GIB_KB)); then
                local freed_gb=$((total_size_cleaned / MOLE_ONE_GIB_KB))
                local movies=$((freed_gb * 10 / 45))

                if [[ $movies -gt 0 ]]; then
                    if [[ $movies -eq 1 ]]; then
                        summary_details+=("Equivalent to ~$movies 4K movie of storage.")
                    else
                        summary_details+=("Equivalent to ~$movies 4K movies of storage.")
                    fi
                fi
            fi

            local final_free_space
            final_free_space=$(get_free_space)
            summary_details+=("Free space now: $final_free_space")
        fi
    else
        summary_status="info"
        if [[ "$DRY_RUN" == "true" ]]; then
            summary_details+=("No significant reclaimable space detected, system already clean.")
        else
            summary_details+=("System was already clean; no additional space freed.")
        fi
        summary_details+=("Free space now: $(get_free_space)")
    fi

    if [[ $had_errexit -eq 1 ]]; then
        set -e
    fi

    # Log session end with summary
    log_operation_session_end "clean" "$files_cleaned" "$total_size_cleaned"

    print_summary_block "$summary_heading" "${summary_details[@]}"
    printf '\n'
}

main() {
    while [[ $# -gt 0 ]]; do
        case "$1" in
            "--help" | "-h")
                show_clean_help
                exit 0
                ;;
            "--debug")
                export MO_DEBUG=1
                ;;
            "--dry-run" | "-n")
                DRY_RUN=true
                export MOLE_DRY_RUN=1
                ;;
            "--external")
                shift
                if [[ $# -eq 0 ]]; then
                    echo "Missing path for --external" >&2
                    exit 1
                fi
                EXTERNAL_VOLUME_TARGET=$(validate_external_volume_target "$1") || exit 1
                ;;
            "--whitelist")
                source "$SCRIPT_DIR/../lib/manage/whitelist.sh"
                manage_whitelist "clean"
                exit 0
                ;;
        esac
        shift
    done

    start_cleanup
    hide_cursor
    perform_cleanup
    show_cursor
    exit 0
}

main "$@"
