#!/usr/bin/env bash
#
# Release script: bump version, generate changelog, commit, and tag.
#
# Usage:
#   ./scripts/release.sh <major|minor|patch>
#   ./scripts/release.sh 2.0.0          # explicit version
#
set -euo pipefail

VERSION_FILE="version"

current_version=$(cat "$VERSION_FILE")
echo "Current version: $current_version"

IFS='.' read -r major minor patch <<< "$current_version"

case "${1:-}" in
    major) new_version="$((major + 1)).0.0" ;;
    minor) new_version="${major}.$((minor + 1)).0" ;;
    patch) new_version="${major}.${minor}.$((patch + 1))" ;;
    "")
        echo "Usage: $0 <major|minor|patch|VERSION>"
        exit 1
        ;;
    *)
        # Validate explicit semver
        if [[ ! "$1" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "Error: '$1' is not a valid semver (X.Y.Z)"
            exit 1
        fi
        new_version="$1"
        ;;
esac

echo "Bumping to: $new_version"

# Update version file
echo "$new_version" > "$VERSION_FILE"

# Generate changelog
git-cliff --tag "v${new_version}" --output CHANGELOG.md

# Commit and tag
git add "$VERSION_FILE" CHANGELOG.md
git commit -m "chore(release): v${new_version}"
git tag "v${new_version}"

echo ""
echo "Released v${new_version}"
echo "Don't forget to push: git push && git push --tags"