#!/usr/bin/env python3
"""
Python standard library HTTP server replacing legacy CGI execution.
Serves static frontend files and provides JSON API endpoint for scraper paths.
"""

import http.server
import json
import os
import sys
from urllib.parse import parse_qs, urlparse, unquote

# Add cgi-bin directory to sys.path so scraper can be imported cleanly
sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'cgi-bin'))
from scraper import run


class PhikipathiaHandler(http.server.SimpleHTTPRequestHandler):
    def do_GET(self):
        parsed_url = urlparse(self.path)

        # Handle API endpoints: /cgi-bin/init.py or /api/find-path
        if parsed_url.path in ['/cgi-bin/init.py', '/api/find-path']:
            query_params = parse_qs(parsed_url.query)

            taal = 'en'
            start = 'Special:Random'
            einde = 'Philosophy'

            if 'data' in query_params:
                try:
                    data_raw = unquote(query_params['data'][0])
                    data_json = json.loads(data_raw)
                    taal = data_json.get('taal', taal)
                    start = data_json.get('start', start)
                    einde = data_json.get('einde', einde)
                except Exception as err:
                    self.send_json({'error': f"Fout bij verwerken van request parameters: {str(err)}"}, status=400)
                    return
            else:
                taal = query_params.get('taal', [taal])[0]
                start = query_params.get('start', [start])[0]
                einde = query_params.get('einde', [einde])[0]

            try:
                antwoord = run(taal, start, einde)
                self.send_json(antwoord)
            except Exception as e:
                self.send_json({'error': f"Interne serverfout: {str(e)}"}, status=500)
            return

        # Default: serve static files (index.html, style.css, index.js, images)
        super().do_GET()

    def send_json(self, data, status=200):
        body = json.dumps(data).encode('utf-8')
        self.send_response(status)
        self.send_header('Content-Type', 'application/json; charset=utf-8')
        self.send_header('Content-Length', str(len(body)))
        self.send_header('Access-Control-Allow-Origin', '*')
        self.send_header('X-Content-Type-Options', 'nosniff')
        self.send_header('X-Frame-Options', 'SAMEORIGIN')
        self.end_headers()
        self.wfile.write(body)

    def log_message(self, format, *args):
        # Clean logging format
        sys.stderr.write(f"[{self.log_date_time_string()}] {format % args}\n")


def main():
    port = int(os.environ.get('PORT', 8000))
    server_address = ('', port)
    httpd = http.server.HTTPServer(server_address, PhikipathiaHandler)
    print(f"Phikipathia server active on http://localhost:{port}")
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        print("\nServer shutting down.")
        httpd.server_close()


if __name__ == '__main__':
    main()