#!/usr/bin/env bash

set -euo pipefail

usage() {
    cat <<'EOU'
Usage: ./release.sh [--dry-run] [--allow-dirty] <semver>

Examples:
  ./release.sh 0.2.0
  ./release.sh --dry-run 0.2.0

This script promotes the dev tag to:
  - tsysdevstack-toolboxstack-toolbox-base:release-current
  - tsysdevstack-toolboxstack-toolbox-base:v<semver>
EOU
}

DRY_RUN=false
ALLOW_DIRTY=false
VERSION=""

while (( $# > 0 )); do
    case "$1" in
        --dry-run)
            DRY_RUN=true
            shift
            ;;
        --allow-dirty)
            ALLOW_DIRTY=true
            shift
            ;;
        -h|--help)
            usage
            exit 0
            ;;
        -*)
            echo "Unknown option: $1" >&2
            usage
            exit 1
            ;;
        *)
            VERSION="$1"
            shift
            ;;
    esac
done

if [[ -z "${VERSION}" ]]; then
    echo "Error: semantic version is required." >&2
    usage
    exit 1
fi

if [[ "${VERSION}" =~ ^v?([0-9]+)\.([0-9]+)\.([0-9]+)$ ]]; then
    SEMVER="v${BASH_REMATCH[1]}.${BASH_REMATCH[2]}.${BASH_REMATCH[3]}"
else
    echo "Error: version must be semantic (e.g., 0.2.0 or v0.2.0)." >&2
    exit 1
fi

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}" && git rev-parse --show-toplevel 2>/dev/null || true)"

if [[ -n "${REPO_ROOT}" && "${ALLOW_DIRTY}" != "true" ]]; then
    if ! git -C "${REPO_ROOT}" diff --quiet --ignore-submodules --exit-code; then
        echo "Error: git working tree has uncommitted changes. Please commit or stash before releasing." >&2
        exit 1
    fi
elif [[ -z "${REPO_ROOT}" ]]; then
    echo "Warning: unable to resolve git repository root; skipping clean tree check." >&2
fi

echo "Preparing release for ${SEMVER}"
echo "  dry-run: ${DRY_RUN}"
echo "  allow-dirty: ${ALLOW_DIRTY}"

# First, ensure we have the dev tag built
if [[ "${DRY_RUN}" == "true" ]]; then
    echo "[dry-run] Would build dev tag"
else
    echo "Building dev tag..."
    "${SCRIPT_DIR}/build.sh"
fi

# Tag the dev image as release-current and with the version
IMAGE_NAME="tsysdevstack-toolboxstack-toolbox-base"

if [[ "${DRY_RUN}" == "true" ]]; then
    echo "[dry-run] Would tag ${IMAGE_NAME}:dev as:"
    echo "  - ${IMAGE_NAME}:release-current"
    echo "  - ${IMAGE_NAME}:${SEMVER}"
else
    echo "Tagging ${IMAGE_NAME}:dev as release-current and ${SEMVER}..."
    docker tag "${IMAGE_NAME}:dev" "${IMAGE_NAME}:release-current"
    docker tag "${IMAGE_NAME}:dev" "${IMAGE_NAME}:${SEMVER}"
    echo "Release ${SEMVER} tagged as:"
    echo "  - tsysdevstack-toolboxstack-toolbox-base:release-current"
    echo "  - tsysdevstack-toolboxstack-toolbox-base:${SEMVER}"
fi