"""
Scans API blueprint.

Handles endpoints for triggering scans, listing scan history, and retrieving
scan results.
"""

from flask import Blueprint, current_app, jsonify, request

bp = Blueprint('scans', __name__)


@bp.route('', methods=['GET'])
def list_scans():
    """
    List all scans with pagination.

    Query params:
        page: Page number (default: 1)
        per_page: Items per page (default: 20, max: 100)
        status: Filter by status (running, completed, failed)

    Returns:
        JSON response with scans list and pagination info
    """
    # TODO: Implement in Phase 2
    return jsonify({
        'scans': [],
        'total': 0,
        'page': 1,
        'per_page': 20,
        'message': 'Scans endpoint - to be implemented in Phase 2'
    })


@bp.route('/<int:scan_id>', methods=['GET'])
def get_scan(scan_id):
    """
    Get details for a specific scan.

    Args:
        scan_id: Scan ID

    Returns:
        JSON response with scan details
    """
    # TODO: Implement in Phase 2
    return jsonify({
        'scan_id': scan_id,
        'message': 'Scan detail endpoint - to be implemented in Phase 2'
    })


@bp.route('', methods=['POST'])
def trigger_scan():
    """
    Trigger a new scan.

    Request body:
        config_file: Path to YAML config file

    Returns:
        JSON response with scan_id and status
    """
    # TODO: Implement in Phase 2
    data = request.get_json() or {}
    config_file = data.get('config_file')

    return jsonify({
        'scan_id': None,
        'status': 'not_implemented',
        'message': 'Scan trigger endpoint - to be implemented in Phase 2',
        'config_file': config_file
    }), 501  # Not Implemented


@bp.route('/<int:scan_id>', methods=['DELETE'])
def delete_scan(scan_id):
    """
    Delete a scan and its associated files.

    Args:
        scan_id: Scan ID to delete

    Returns:
        JSON response with deletion status
    """
    # TODO: Implement in Phase 2
    return jsonify({
        'scan_id': scan_id,
        'status': 'not_implemented',
        'message': 'Scan deletion endpoint - to be implemented in Phase 2'
    }), 501


@bp.route('/<int:scan_id>/status', methods=['GET'])
def get_scan_status(scan_id):
    """
    Get current status of a running scan.

    Args:
        scan_id: Scan ID

    Returns:
        JSON response with scan status and progress
    """
    # TODO: Implement in Phase 2
    return jsonify({
        'scan_id': scan_id,
        'status': 'not_implemented',
        'progress': '0%',
        'message': 'Scan status endpoint - to be implemented in Phase 2'
    })


@bp.route('/<int:scan_id1>/compare/<int:scan_id2>', methods=['GET'])
def compare_scans(scan_id1, scan_id2):
    """
    Compare two scans and show differences.

    Args:
        scan_id1: First scan ID
        scan_id2: Second scan ID

    Returns:
        JSON response with comparison results
    """
    # TODO: Implement in Phase 4
    return jsonify({
        'scan_id1': scan_id1,
        'scan_id2': scan_id2,
        'diff': {},
        'message': 'Scan comparison endpoint - to be implemented in Phase 4'
    })


# Health check endpoint
@bp.route('/health', methods=['GET'])
def health_check():
    """
    Health check endpoint for monitoring.

    Returns:
        JSON response with API health status
    """
    return jsonify({
        'status': 'healthy',
        'api': 'scans',
        'version': '1.0.0-phase1'
    })