#!/data/data/com.termux/files/usr/bin/env bash
# reset environment variables that could interfere with normal usage
unset -v GREP_OPTIONS
# put all utility functions here

# make a temporary file
git_extra_mktemp() {
    mktemp -t "$(basename "$0")".XXXXXXX
}

git_extra_default_branch() {
    local extras_default_branch init_default_branch
    extras_default_branch=$(git config --get git-extras.default-branch)
    init_default_branch=$(git config --get init.defaultBranch)
    if [ -n "$extras_default_branch" ]; then
        echo "$extras_default_branch"
    elif [ -n "$init_default_branch" ]; then
        echo "$init_default_branch"
    else
        echo "main"
    fi
}
#
# check whether current directory is inside a git repository
#

is_git_repo() {
  git rev-parse --show-toplevel > /dev/null 2>&1
  result=$?
  if test $result != 0; then
    >&2 echo 'Not a git repo!'
    exit $result
  fi
}

is_git_repo
#
# check whether current directory contains any git commit
#

has_git_commit() {
  git rev-parse --short HEAD > /dev/null 2>&1
  result=$?
  if test $result != 0; then
    >&2 echo 'Not git commit found!'
    exit $result
  fi
}

has_git_commit

REF=""
SINCE=""

while [[ $# -gt 0 ]]; do
    case "$1" in
        -r|--ref)
            if [[ -z "$2" ]]; then
                echo "error: option $1 requires an argument" >&2
                exit 1
            fi
            REF="$2"
            shift
            shift
            ;;
        *)
            # non-flag args accumulation, e.g. "last " + "week" -> "last week"
            SINCE="${SINCE:+$SINCE }$1"
            shift
            ;;
    esac
done

if [[ -n "$REF" && -n "$SINCE" ]]; then
    echo "error: '--ref <ref>' and '<date>' are mutually exclusive" >&2
    exit 1
fi

SINCE="${SINCE:-last week}"

if [[ -n "$REF" ]]; then
    git log --pretty='%h %an - %s' "$REF..HEAD"
else
    git log --pretty='%h %an - %s' --after="@{$SINCE}"
fi
