#!/usr/bin/env bash
# Shared Release Script — CalVer tag and push for any project.
# Called by per-project release.sh wrappers.
#
# Usage: release-core.sh --config <config-file> <service> [version]
#
# Config file format (bash-sourceable):
#   BASEDIR="/mnt/NV2/Development/my-project"
#   declare -A SERVICE_DIRS=([database]="database" [discord]="discord-app")
#   declare -A SERVICE_IMAGES=([database]="manticorum67/my-database" [discord]="manticorum67/my-discord")
#
# shellcheck disable=SC2086

set -euo pipefail

# --- Parse args ---

CONFIG_FILE=""
while [[ $# -gt 0 ]]; do
  case "$1" in
    --config)
      CONFIG_FILE="$2"
      shift 2
      ;;
    *) break ;;
  esac
done

if [[ -z "$CONFIG_FILE" || ! -f "$CONFIG_FILE" ]]; then
  echo "Error: config file not found: ${CONFIG_FILE:-<not specified>}"
  echo "Usage: release-core.sh --config <config-file> <service> [version]"
  exit 1
fi

# shellcheck source=/dev/null
source "$CONFIG_FILE"

# Validate config
if [[ -z "${BASEDIR:-}" ]]; then
  echo "Error: BASEDIR not set in config file"
  exit 1
fi

# --- Service resolution ---

SERVICE="${1:-}"
VERSION="${2:-}"

if [[ -z "$SERVICE" ]]; then
  echo "Usage: release-core.sh --config <config> <service> [version]"
  echo ""
  echo "Available services: ${!SERVICE_DIRS[*]}"
  exit 1
fi

SERVICE_DIR="${SERVICE_DIRS[$SERVICE]:-}"
if [[ -z "$SERVICE_DIR" ]]; then
  echo "Error: unknown service '$SERVICE'"
  echo "Available services: ${!SERVICE_DIRS[*]}"
  exit 1
fi

IMAGE="${SERVICE_IMAGES[$SERVICE]:-}"
REPO_DIR="$BASEDIR/$SERVICE_DIR"

if [[ ! -d "$REPO_DIR/.git" ]]; then
  echo "Error: $REPO_DIR is not a git repository"
  exit 1
fi

cd "$REPO_DIR"

# --- Validation ---

CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
if [[ "$CURRENT_BRANCH" != "main" ]]; then
  echo "Error: not on main branch (currently on '$CURRENT_BRANCH')"
  echo "Switch to main before releasing."
  exit 1
fi

if ! git diff --quiet HEAD 2>/dev/null; then
  echo "Error: uncommitted changes in $REPO_DIR"
  echo "Commit or stash changes before releasing."
  exit 1
fi

echo "Pulling latest main..."
git pull --ff-only origin main 2>/dev/null || {
  echo "Error: could not fast-forward main. Resolve divergence first."
  exit 1
}

# --- Version ---

IS_DEV=0

if [[ "$VERSION" == "dev" ]]; then
  IS_DEV=1
elif [[ -z "$VERSION" ]]; then
  YEAR=$(date +%Y)
  MONTH=$(date +%-m)
  LATEST=$(git tag --list "${YEAR}.${MONTH}.*" --sort=-version:refname | head -1)
  if [[ -n "$LATEST" ]]; then
    BUILD=$(echo "$LATEST" | cut -d. -f3)
    BUILD=$((BUILD + 1))
  else
    BUILD=1
  fi
  VERSION="${YEAR}.${MONTH}.${BUILD}"
fi

if [[ "$IS_DEV" -eq 0 ]]; then
  if ! [[ "$VERSION" =~ ^20[0-9]{2}\.[0-9]{1,2}\.[0-9]+$ ]]; then
    echo "Error: invalid CalVer format '$VERSION'"
    echo "Expected: YYYY.M.BUILD (e.g., 2026.3.42) or 'dev'"
    exit 1
  fi

  if git rev-parse "$VERSION" &>/dev/null; then
    echo "Error: tag '$VERSION' already exists"
    exit 1
  fi
fi

# --- Summary ---

echo ""
echo "=== Release Summary ==="
echo "  Service:  $SERVICE"
echo "  Repo:     $REPO_DIR"
echo "  Branch:   main ($(git rev-parse --short HEAD))"
echo "  Version:  $VERSION"
if [[ "$IS_DEV" -eq 1 ]]; then
  echo "  Environment: dev (force-updating tag)"
fi
if [[ -n "$IMAGE" ]]; then
  echo "  Image:    $IMAGE:$VERSION"
fi
echo ""

# --- Confirm ---

if [[ "${SKIP_CONFIRM:-}" != "1" ]]; then
  read -r -p "Proceed? [y/N] " REPLY
  if [[ ! "$REPLY" =~ ^[Yy]$ ]]; then
    echo "Aborted."
    exit 0
  fi
fi

# --- Tag and push ---

if [[ "$IS_DEV" -eq 1 ]]; then
  echo "Force-updating dev tag..."
  git tag -f dev
  git push origin dev --force 2>&1
else
  echo "Creating tag $VERSION..."
  git tag "$VERSION"
  echo "Pushing tag..."
  git push origin "$VERSION" 2>&1
fi

echo ""
if [[ -n "$IMAGE" ]]; then
  echo "CI will build and push: $IMAGE:$VERSION"
fi
echo ""
echo "Done. Tagged $SERVICE as $VERSION."