#!/bin/bash

# 日志级别定义
LOG_LEVEL_DEBUG=10
LOG_LEVEL_INFO=20
LOG_LEVEL_WARNING=30
LOG_LEVEL_ERROR=40

# 当前日志级别
CURRENT_LOG_LEVEL=$LOG_LEVEL_INFO

# 颜色定义
COLOR_RESET="\033[0m"
COLOR_DEBUG="\033[0;36m"
COLOR_INFO="\033[0;32m"
COLOR_WARNING="\033[0;33m"
COLOR_ERROR="\033[0;31m"

# 日志函数
log() {
    local level=$1
    shift
    local message="$*"
    local timestamp=$(date +"%Y-%m-%d %H:%M:%S")
    local color=$COLOR_RESET

    if [ "$level" -ge "$CURRENT_LOG_LEVEL" ]; then
        case $level in
            $LOG_LEVEL_DEBUG)
                color=$COLOR_DEBUG
                ;;
            $LOG_LEVEL_INFO)
                color=$COLOR_INFO
                ;;
            $LOG_LEVEL_WARNING)
                color=$COLOR_WARNING
                ;;
            $LOG_LEVEL_ERROR)
                color=$COLOR_ERROR
                ;;
        esac
        echo -e "${color}[$timestamp] [${level}] $message${COLOR_RESET}"
    fi
}

# 帮助函数
show_help() {
    echo "Usage: $0 [options]"
    echo "Options:"
    echo "  -h, --help    Show this help message and exit"
    echo "  -v, --verbose Set log level to debug"
}

# 解析命令行参数
while [[ "$#" -gt 0 ]]; do
    case $1 in
        -h|--help)
            show_help
            exit 0
            ;;
        -v|--verbose)
            CURRENT_LOG_LEVEL=$LOG_LEVEL_DEBUG
            shift
            ;;
        *)
            echo "Unknown parameter passed: $1"
            show_help
            exit 1
            ;;
    esac
    shift
done

# 示例日志记录
log $LOG_LEVEL_INFO "Script started"
log $LOG_LEVEL_DEBUG "This is a debug message"
log $LOG_LEVEL_WARNING "This is a warning message"
log $LOG_LEVEL_ERROR "This is an error message"