#!bin/bash

# 读取头文件
parse_yaml(){
    local prefix=$2
    local s='[[:space:]]*' w='[a-zA-Z0-9_]*' fs=$(echo @|tr @ '\034')
    # 1,10s 表示只看前10行。
    sed -ne "1,10s|^\($s\)\($w\)$s:$s\"\(.*\)\"$s\$|\1$fs\2$fs\3|p" \
            -e "1,10s|^\($s\)\($w\)$s:$s\(.*\)$s\$|\1$fs\2$fs\3|p"  $1 |
    awk -F$fs '{
        indent = length($1)/2;
        vname[indent] = $2;
        for (i in vname) {if (i > indent) {delete vname[i]}}
        if (length($3) > 0) {
            vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
            printf("%s%s%s=\"%s\"\n", "'$prefix'",vn, $2, $3);
        }
    }'
}

showFileInfo(){
    oldIFS=$IFS
    IFS="#"
    #parse_yaml $1  "config_"
    eval $(parse_yaml $1  "config_")

    tags=${config_tags//[$'\t\r\n']/}
    cates=${config_categories//[$'\t\r\n']/}

    checkTags $1 $tags
    checkCategories $1 $cates
    IFS=$oldIFS
}

checkTags(){
    tags=$(tag --list --no-name $1)
    if [ -z $tags ]
    then
        realtags='[无标签]'
    else
        # 两个斜杠表示替换所有
        realtags="[${tags//,/, }]"
    fi

    if [ "$2" = "$realtags" ];
    then
        if [ $showInfo = true ]
        then
            echo $1 '   ' tags ✓ ' '
        fi
    else
        echo  "$1  tags: \"$2\" --> \"$realtags\""
        if [ $fixit = true ]
        then
            # 整行替换以 “tags：” 开头的那一行
            sed -i '' "s/^[[:blank:]]*tags:.*/tags: $realtags/" $1
        fi
    fi
}

checkCategories(){

    # 截取子路径
    subpath=${1/$dirPath/}
    # 截取文件名
    filename=${1##*/}
    subpath=${subpath/$filename/}

    cates=${2//[\[\] ]/}
    cates=/${cates//,/\/}/

    if [ $subpath = $cates ]
    then
        if [ $showInfo = true ]
        then
            echo $1 '   ' categories ✓
        fi
    else
        #删除前面的 “/”
        catesname=${subpath#*\/}
        #删除前面的 “后面的 /”
        catesname=${catesname%/*}
        catesname="[${catesname/\//, }]"

        echo  "$1 categories: \"$2\" --> \"${catesname}\""

        if [ $fixit = true ]
        then
            # 整行替换以 “categories：” 开头的那一行
            sed -i '' "s/^[[:blank:]]*categories:.*/categories: ${catesname}/" $1
        fi
    fi
}

export -f showFileInfo
export -f parse_yaml
export -f checkTags
export -f checkCategories

#export dirPath='.'
export dirPath='../source/_posts'

export timelimit=3
export fixit=false
export showInfo=false

#  读取用户设定
readArgs(){

    echo '默认目录：' $dirPath
    read -p '更改目录请输入（不更改直接回车）：' arg
    if [ -n "$arg" ]
    then
        dirPath=$arg
    fi


    read -p "时间限定(天数 ${timelimit}天，不更改直接回车)：" arg
    if [ -n "$arg" ]
    then
        timelimit="-${arg}d" # 时间限制
    else
        timelimit="-${timelimit}d"
    fi


    read -p '自动修改请输入“fix”，否则只作检查：' arg
    if [ "$arg" = "fix" ]
    then
        fixit=true
    fi

    read -p '是否显示所有信息？（输入 y 确认）：' arg
    if [ "$arg" = "y" ]
    then
        showInfo=true
    fi
}

readArgs

find $dirPath -type f -name "*.md" | xargs -n 1 -P 10 -I {}  bash -c 'showFileInfo "$@"' _ {} \;