#!/bin/bash



MODES=()
MODE=$(git config --get version-check-hook.mode)
raw_config_str=$(git config --get-regex version-check-hook\.)
DEFAULT_IFS=$IFS
IFS=$'\n'
config_str=(${raw_config_str//version-check-hook./})

for line in ${config_str[*]} ; do
    name=${line%%[- ]*}
    if [ $name != "mode" ] ; then
        # for loopで重複確認（配列を関数に渡すのは大変）
        is_contain=false
        for mode in ${MODES[*]} ; do
            if [ $mode = $name ] ; then is_contain=true ; break ; fi
        done
        if ! $is_contain ; then
            MODES+=($name)
        fi
    fi
done

# branch nameを取得
BRANCH_NAME=""
BRANCH_NAMES=($(git branch --contains HEAD 2>/dev/null)) || exit 0; #ブランチ名が取れなかった
for bname in ${BRANCH_NAMES[*]} ; do
    if [[ $bname =~ ^\*[\ ] ]] ; then
        BRANCH_NAME=${bname:2}
        break
    fi
done

VERSION_TAG=$(git config --get gitflow.prefix.versiontag)
PREFIX_RELEASE=$(git config --get gitflow.prefix.release)
PREFIX_HOTFIX=$(git config --get gitflow.prefix.hotfix)

# get the version
case $BRANCH_NAME in
    ${PREFIX_RELEASE}* )
        VERSION=$(expr "${BRANCH_NAME:${#PREFIX_RELEASE}}" : "[^0-9]*\([0-9.]*[ab]\{0,1\}\)$" ) ;;
    ${PREFIX_HOTFIX}* )
        VERSION=$(expr "${BRANCH_NAME:${#PREFIX_HOTFIX}}" : "[^0-9]*\([0-9.]*[ab]\{0,1\}\)$" ) ;;
    *)
        exit 0  # versionチェックすべきコミットではない
esac

if [ -z $VERSION ] ; then exit 0 ; fi

for mode in ${MODES[*]} ; do
    if [ $MODE = $mode -o $MODE = "all" ] ; then
        pattern=""
        path=""
        for line in ${config_str[*]} ; do
            name=${line%%-*}
            rest=${line#*-}
            if [ $name = $mode ] ; then
                key=${rest%% *}
                value=${rest#* }
                if [ $key = "path" ] ; then path=$value
                elif [ $key = "pattern" ] ; then pattern=$value
                fi
            fi
        done
        # pathを調べて正規表現でチェック
        if [ -z $(git ls-files $path) ] ; then continue ; fi
        raw_match_line=($(git grep -n --full-name "$pattern" $path))
        match_line=${raw_match_line#*:*:}
        if [ ${#match_line[*]} -gt 1 ] ; then
            echo "[version-check-hook] Found multiple mutch lines."
            echo "Abort."
            exit 1
        elif [ ${#match_line[*]} -eq 0 ] ; then
            echo "[version-check-hook] Couldn't find a mutch line."
            echo "Abort."
            exit 1
        else
            match_version=$(expr "${match_line}" : "$pattern")
            if [ -z $match_version ] ; then
                echo "[version-check-hook] Failed to extract version string in [$path]: $pattern"
                exit 1
            fi
            if [ $VERSION != $match_version ] ; then
                echo "[version-check-hook] Incompatible version found."
                echo "Your branch: ${VERSION}"
                echo "Matched version: ${match_version}"
                echo "----"
                echo $raw_match_line
                exit 1
            fi
        fi
    fi
done

exit 0