#!/usr/bin/env bash
set -euo pipefail

this_file=$(readlink -f "${BASH_SOURCE[0]}")
this_dir=${this_file%/*}
. "${this_dir}"/lib.bash

increment_version() {
    local bump_type="$1" old_version="$2"
    case "${bump_type}" in
        patch) echo "${old_version}" \
                 | perl -F'\.' -le 'print(join ".", $F[0], $F[1], $F[2]+1)' ;;
        minor) echo "${old_version}" \
                 | perl -F'\.' -le 'print(join ".", $F[0], $F[1]+1, 0)' ;;
        major) echo "${old_version}" \
                 | perl -F'\.' -le 'print(join ".", $F[0]+1, 0, 0)' ;;
    esac
}

update_version() {
    local old_version="$1" new_version="$2"
    cargo run -q -- set Cargo.toml package.version "${new_version}" \
      | sponge Cargo.toml
    new_version=$new_version \
      perl -i -0pe 's/^name = "toml-cli"\nversion = \K".*?"/"${ENV{new_version}}"/m' \
      Cargo.lock
    old_version=$old_version new_version=$new_version \
      perl -i -0pe 's/^toml-\S+ \K${ENV{old_version}}/${ENV{new_version}}/gm' \
      README.md
    new_version=$new_version \
      perl -i -0pe 's/^## Unreleased\n\K/\n\n## ${ENV{new_version}}\n/m' \
      CHANGELOG.md
}

start_release() {
    (( $# == 1 )) || die "usage: tools/release start {patch|minor|major}"
    local bump_type="$1"
    case "${bump_type}" in
        patch|minor|major) ;;
        *) die "usage: tools/release start {patch|minor|major}"
    esac

    local old_version new_version tag_name
    old_version=$(get_version)
    new_version=$(increment_version "${bump_type}" "${old_version}")
    tag_name=v${new_version}

    update_version "${old_version}" "${new_version}"

    git commit -am "Release version ${new_version}."
    git tag "${tag_name}"

    prepare_colors
    cat <<EOF >&2

Version updated: ${bold}${new_version}${reset}

Next steps:

  \$ ${bold}git log --stat -p upstream..${reset}  # check your work

  \$ ${bold}tools/build-release linux-x86${reset}

  \$ ${bold}git push --atomic upstream main ${tag_name}${reset}

  \$ ${bold}cargo publish${reset}

  * visit ${bold}https://github.com/gnprice/toml-cli/releases${reset} and:
    * create release from tag
    * add changelog
    * upload artifacts ${bold}target/archive/toml-${new_version}-*${reset}
EOF
}

case "${1-}" in
    start) shift && start_release "$@" ;;
    *) die "usage: tools/release start ...ARGS" ;;
esac