#!/bin/bash
set -e
# ----------------------------------------------------------------------------------------------
# ------------- Clear Unraid system logs and Docker container logs safely ----------------------
# ----------------------------------------------------------------------------------------------

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

# Load central config
load_master_conf

# Parse CLI args (supports --dry-run)
parse_args "$@"

# Colors for output
RED="\033[0;31m"
GREEN="\033[0;32m"
YELLOW="\033[1;33m"
RESET="\033[0m"

# Log files to clear (can also be overridden in Master.conf)
LOG_FILES=("${LOG_FILES[@]:-/var/log/syslog /var/log/messages /var/log/dmesg}")

# Require root
if [ "$EUID" -ne 0 ]; then
    printf "${RED}❌ Please run as root.${RESET}\n"
    exit 1
fi

echo -e "${YELLOW}Starting log cleanup...${RESET}\n"

# Functions
clear_file() {
    local file="$1"
    if [ ! -f "$file" ]; then
        printf "${RED}Not found:${RESET} %s\n" "$file"
        return
    fi

    if [ "$DRY_RUN" = true ]; then
        printf "${YELLOW}Would clear:${RESET} %s\n" "$file"
    else
        : > "$file"
        printf "${GREEN}Cleared:${RESET} %s\n" "$file"
    fi
}

clear_docker_logs() {
    if [ ! -d /var/lib/docker/containers ]; then
        printf "${RED}Docker containers directory not found. Skipping Docker log cleanup.${RESET}\n"
        return
    fi

    local files
    files=$(find /var/lib/docker/containers/ -name "*-json.log" 2>/dev/null)
    for file in $files; do
        if [ "$DRY_RUN" = true ]; then
            printf "${YELLOW}Would clear Docker log:${RESET} %s\n" "$file"
        else
            : > "$file"
            printf "${GREEN}Cleared Docker log:${RESET} %s\n" "$file"
        fi
    done
}

# MAIN
for log in "${LOG_FILES[@]}"; do
    clear_file "$log"
done

clear_docker_logs

if [ "$DRY_RUN" = true ]; then
    printf "\n${YELLOW}🧪 Dry run complete. No files were cleared.${RESET}\n"
else
    printf "\n${GREEN}🎉 Done clearing logs.${RESET}\n"
fi