#!/usr/bin/env bash
# Bash script to prepare a release using git-cliff.
# Inspired by https://github.com/orhun/git-cliff/blob/main/release.sh

# Check if a version tag is provided.
if [ "$#" -eq 1 ]; then
    VERSION_TAG=$1
else
    # After git-cliff version 1.4.0 it should be possible to run `git cliff --bumped-version`.
    suggested_version=$(git cliff --unreleased --bump --context | jq -r .[0].version)
    echo -n "No version tag provided. git-cliff suggests $suggested_version. Proceed? [Y/n] "
    read user_input

    # Check if input is empty or a variation of "yes".
    if [[ -z "$user_input" || "$user_input" =~ ^[Yy](es)?$ ]]; then
        echo "Proceeding with version $suggested_version."
        VERSION_TAG=$suggested_version
    else
        echo "Release preparation cancelled."
        exit 1
    fi
fi

# Update CHANGELOG.
git cliff --tag "$VERSION_TAG" -o CHANGELOG.md

# Add all changes and commit.
git add -A
git commit -m "🔖 chore(release): prepare for $VERSION_TAG"

# Template for the tag description.
export GIT_CLIFF_TEMPLATE="\
    {% for group, commits in commits | group_by(attribute=\"group\") %}\
    {{ group | striptags | trim | upper_first }}\
    {% for commit in commits %}\
        - {% if commit.breaking %}(**‼️BREAKING‼️**) {% endif %}{{ commit.message | upper_first }} ({{ commit.id | truncate(length=7, end=\"\") }})\
    {% endfor %}\
    {% endfor %}"

# Generate the tag description.
changelog=$(git cliff --tag "$VERSION_TAG" --unreleased --strip all)

# Create a signed and annotated tag.
git tag -s -a "$VERSION_TAG" -m "Release $VERSION_TAG" -m "$changelog"

echo "Most recent commit:"
git log -1
echo
echo "Information for tag $VERSION_TAG:"
git show $VERSION_TAG
echo

echo "Release $VERSION_TAG is ready. Don't forget to push the changes and the tag:"
echo "git push && git push --tags"