from __future__ import annotations

import argparse
import base64
import json
import os
import sys
import tempfile
from http import HTTPStatus
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
from pathlib import Path
from urllib.parse import urlparse

REPO_ROOT = Path(__file__).resolve().parents[2]
WSCRAPER_SRC = REPO_ROOT / "bin" / "wscraper" / "src"
if str(WSCRAPER_SRC) not in sys.path:
    sys.path.insert(0, str(WSCRAPER_SRC))

from wscraper.sites.happyfappy import run_download_torrent_files, run_get_bookmarks

HOST = os.environ.get("WSCRAPER_SERVICE_HOST", "0.0.0.0")
PORT = int(os.environ.get("WSCRAPER_SERVICE_PORT", "8787"))
TOKEN = os.environ.get("WSCRAPER_SERVICE_TOKEN", "")


def json_response(handler: BaseHTTPRequestHandler, status: int, payload: dict) -> None:
    body = json.dumps(payload, ensure_ascii=False).encode("utf-8")
    handler.send_response(status)
    handler.send_header("Content-Type", "application/json; charset=utf-8")
    handler.send_header("Content-Length", str(len(body)))
    handler.end_headers()
    handler.wfile.write(body)


def parse_json_body(handler: BaseHTTPRequestHandler) -> dict:
    length = int(handler.headers.get("Content-Length", "0"))
    raw = handler.rfile.read(length) if length > 0 else b"{}"
    return json.loads(raw.decode("utf-8"))


def require_auth(handler: BaseHTTPRequestHandler) -> bool:
    if not TOKEN:
        return True
    auth_header = handler.headers.get("Authorization", "")
    if auth_header == f"Bearer {TOKEN}":
        return True
    json_response(handler, HTTPStatus.UNAUTHORIZED, {"error": "Unauthorized"})
    return False


def normalize_tracker(payload: dict) -> str:
    tracker = str(payload.get("tracker", "")).strip().lower()
    if tracker not in {"happyfappy", "hf"}:
        raise ValueError("Unsupported tracker")
    return "happyfappy"


class Handler(BaseHTTPRequestHandler):
    server_version = "wscraper-service/1.0"

    def do_GET(self) -> None:  # noqa: N802
        parsed = urlparse(self.path)
        if parsed.path == "/health":
            if not require_auth(self):
                return
            json_response(self, HTTPStatus.OK, {"ok": True, "service": "wscraper-service"})
            return
        if parsed.path == "/trackers":
            if not require_auth(self):
                return
            json_response(
                self,
                HTTPStatus.OK,
                {"items": [{"key": "happyfappy", "label": "HappyFappy"}]},
            )
            return
        json_response(self, HTTPStatus.NOT_FOUND, {"error": "Not found"})

    def do_POST(self) -> None:  # noqa: N802
        if not require_auth(self):
            return

        parsed = urlparse(self.path)
        try:
            payload = parse_json_body(self)
            if parsed.path == "/bookmarks":
                tracker = normalize_tracker(payload)
                cookie = str(payload.get("cookie", "")).strip()
                if not cookie:
                    raise ValueError("Cookie is required")
                with tempfile.TemporaryDirectory(prefix="wscraper-bookmarks-") as tmpdir:
                    output_path = Path(tmpdir) / "bookmarks.json"
                    run_get_bookmarks(
                        argparse.Namespace(
                            base_url="https://www.happyfappy.net",
                            cookie=cookie,
                            cookie_file=None,
                            output=str(output_path),
                            delay_min=1.8,
                            delay_max=3.2,
                            retries=3,
                            backoff_base=5.0,
                            max_pages=200,
                        )
                    )
                    items = json.loads(output_path.read_text(encoding="utf-8"))
                json_response(self, HTTPStatus.OK, {"tracker": tracker, "items": items})
                return

            if parsed.path == "/download":
                tracker = normalize_tracker(payload)
                cookie = str(payload.get("cookie", "")).strip()
                detail_url = str(payload.get("url", "")).strip()
                remove_bookmark = bool(payload.get("removeBookmark", True))
                if not cookie:
                    raise ValueError("Cookie is required")
                if not detail_url:
                    raise ValueError("Detail url is required")
                with tempfile.TemporaryDirectory(prefix="wscraper-download-") as tmpdir:
                    output_dir = Path(tmpdir) / "torrent"
                    run_download_torrent_files(
                        argparse.Namespace(
                            url=detail_url,
                            base_url="https://www.happyfappy.net",
                            cookie=cookie,
                            cookie_file=None,
                            output_dir=str(output_dir),
                            rm_bookmark=remove_bookmark,
                            retries=3,
                            backoff_base=5.0,
                        )
                    )
                    files = sorted(output_dir.glob("*.torrent"))
                    if not files:
                        raise RuntimeError("No torrent file produced")
                    torrent_path = files[0]
                    content = base64.b64encode(torrent_path.read_bytes()).decode("ascii")
                json_response(
                    self,
                    HTTPStatus.OK,
                    {
                        "tracker": tracker,
                        "filename": torrent_path.name,
                        "contentBase64": content,
                    },
                )
                return

            json_response(self, HTTPStatus.NOT_FOUND, {"error": "Not found"})
        except Exception as error:  # noqa: BLE001
            json_response(
                self,
                HTTPStatus.BAD_REQUEST,
                {"error": str(error)},
            )

    def log_message(self, fmt: str, *args) -> None:
        print(f"[wscraper-service] {self.address_string()} - {fmt % args}")


def main() -> None:
    server = ThreadingHTTPServer((HOST, PORT), Handler)
    print(f"wscraper-service listening on http://{HOST}:{PORT}")
    server.serve_forever()


if __name__ == "__main__":
    main()