#!/bin/bash
# Extract release notes from CHANGELOG for a specific version
# Usage: ./extract-release-notes.sh <app> <version> <environment> <tag_name> <output_file>

set -e

APP=$1
VERSION=$2
ENV=$3
TAG_NAME=$4
OUTPUT_FILE=$5

if [ -z "$APP" ] || [ -z "$VERSION" ] || [ -z "$ENV" ] || [ -z "$TAG_NAME" ] || [ -z "$OUTPUT_FILE" ]; then
  echo "❌ Error: Missing required parameters" >&2
  echo "Usage: ./extract-release-notes.sh <app> <version> <environment> <tag_name> <output_file>" >&2
  exit 1
fi

# Determine CHANGELOG path and app name
if [ "$APP" = "worker-mobile-app" ]; then
  CHANGELOG_PATH="apps/mobile/apps/staff/CHANGELOG.md"
  APP_NAME="Staff Product (Worker)"
else
  CHANGELOG_PATH="apps/mobile/apps/client/CHANGELOG.md"
  APP_NAME="Client Product"
fi

# Try to extract release notes for this version
if [ -f "$CHANGELOG_PATH" ]; then
  echo "📝 Found CHANGELOG at $CHANGELOG_PATH" >&2
  
  # Extract section for this version
  # Look for ## [vVERSION] or ## [VERSION] and collect content until next ## [ header
  # Try with 'v' prefix first (common format), then without
  CHANGELOG_CONTENT=$(awk "/^## \[v${VERSION}\]/{flag=1; next} /^## \[/{flag=0} flag" "$CHANGELOG_PATH")
  
  # If still empty, try without 'v' prefix
  if [ -z "$CHANGELOG_CONTENT" ]; then
    CHANGELOG_CONTENT=$(awk "/^## \[${VERSION}\]/{flag=1; next} /^## \[/{flag=0} flag" "$CHANGELOG_PATH")
  fi
  
  if [ -z "$CHANGELOG_CONTENT" ]; then
    echo "⚠️ Warning: No CHANGELOG entry found for version $VERSION" >&2
    NOTES="**Environment:** $ENV
**Tag:** $TAG_NAME

## What is new in this release

⚠️ No CHANGELOG entry found for this version. Please update the CHANGELOG manually."
  else
    echo "✅ Extracted release notes for version $VERSION" >&2
    NOTES="**Environment:** $ENV
**Tag:** $TAG_NAME

## What is new in this release

$CHANGELOG_CONTENT"
  fi
else
  echo "⚠️ Warning: CHANGELOG not found at $CHANGELOG_PATH" >&2
  NOTES="**Environment:** $ENV
**Tag:** $TAG_NAME

## What is new in this release

⚠️ CHANGELOG file not found at $CHANGELOG_PATH"
fi

# Save to output file
echo "$NOTES" > "$OUTPUT_FILE"
echo "✅ Release notes saved to $OUTPUT_FILE" >&2