#!/usr/bin/env bash
set -euo pipefail

# Read hook input from stdin (JSON with tool_input.file_path)
INPUT=$(cat)
FILE_PATH=$(echo "$INPUT" | python3 -c "import sys,json; print(json.load(sys.stdin).get('tool_input',{}).get('file_path',''))" 2>/dev/null || echo "")

# Only run for Java files under backend/
case "$FILE_PATH" in
    */backend/src/*.java|backend/src/*.java) ;;
    *) exit 0 ;;
esac

cd "$CLAUDE_PROJECT_DIR/backend"

# Run compile (includes validate phase -> Checkstyle if configured)
# Context-efficient: suppress output on success, show full output on failure
if OUTPUT=$(./mvnw compile -q 2>&1); then
    echo '{"hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"✓ Backend compile passed."}}'
else
    ESCAPED=$(echo "$OUTPUT" | python3 -c "import sys,json; print(json.dumps(sys.stdin.read()))")
    echo "{\"hookSpecificOutput\":{\"hookEventName\":\"PostToolUse\",\"additionalContext\":$ESCAPED}}"
fi