#!/bin/bash

# increment_and_commit.sh
#
# Automates version bumping based on git tags.
# Git tag is the authoritative source of truth.
#
# Usage:
#   ./increment_and_commit.sh "Your commit message here"     # Bump patch (default)
#   ./increment_and_commit.sh --minor "Your commit message"  # Bump minor
#   ./increment_and_commit.sh --major "Your commit message"  # Bump major
#
# This script coordinates version updates across all files in the project

set -e

VERSION_FILE="www/js/version.json"
BUMP_TYPE="patch"
COMMIT_MSG=""

# Parse arguments
while [[ $# -gt 0 ]]; do
  case $1 in
    --minor)
      BUMP_TYPE="minor"
      shift
      ;;
    --major)
      BUMP_TYPE="major"
      shift
      ;;
    --patch)
      BUMP_TYPE="patch"
      shift
      ;;
    -*|--*)
      echo "Unknown option: $1"
      echo "Usage: $0 [--major|--minor|--patch] [commit message]"
      exit 1
      ;;
    *)
      COMMIT_MSG="$1"
      shift
      ;;
  esac
done

# Get the latest git tag (authoritative version)
LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
echo "Latest tag: $LATEST_TAG"

# Parse version components
VERSION=${LATEST_TAG#v}  # Remove 'v' prefix
MAJOR=$(echo "$VERSION" | cut -d. -f1)
MINOR=$(echo "$VERSION" | cut -d. -f2)
PATCH=$(echo "$VERSION" | cut -d. -f3)

# Increment version based on bump type
case $BUMP_TYPE in
  major)
    MAJOR=$((MAJOR + 1))
    MINOR=0
    PATCH=0
    ;;
  minor)
    MINOR=$((MINOR + 1))
    PATCH=0
    ;;
  patch)
    PATCH=$((PATCH + 1))
    ;;
esac

NEW_VERSION="${MAJOR}.${MINOR}.${PATCH}"
NEW_TAG="v${NEW_VERSION}"
echo "New version: $NEW_TAG ($BUMP_TYPE bump)"

# Prompt for commit message if not provided
if [ -z "$COMMIT_MSG" ]; then
  echo ""
  echo "Enter commit message (or press Enter for default: \"Release $NEW_TAG\"):"
  read -r COMMIT_MSG
  if [ -z "$COMMIT_MSG" ]; then
    COMMIT_MSG="Release $NEW_TAG"
  fi
fi

echo "Commit message: $COMMIT_MSG"

# Update version.json
cat > "$VERSION_FILE" << EOF
{
  "VERSION": "$NEW_TAG",
  "VERSION_NUMBER": "$NEW_VERSION",
  "BUILD_DATE": "$(date -u +"%Y-%m-%dT%H:%M:%S.%3NZ")"
}
EOF

echo "Updated $VERSION_FILE"

# Stage all changes (version file + any other modified/new files)
git add .

# Commit with the provided message
git commit -m "$COMMIT_MSG"

# Create new tag
git tag "$NEW_TAG"

echo ""
echo "✅ Committed and tagged: $NEW_TAG"
echo ""

# Auto-push to remote
git push origin master --tags
echo "✅ Pushed to remote"