"""Unit tests for controllers.web.remote_files endpoints."""

from __future__ import annotations

from types import SimpleNamespace
from unittest.mock import MagicMock, patch

import pytest
from flask import Flask

from controllers.common.errors import FileTooLargeError, RemoteFileUploadError
from controllers.web.remote_files import RemoteFileInfoApi, RemoteFileUploadApi


def _app_model() -> SimpleNamespace:
    return SimpleNamespace(id="app-1")


def _end_user() -> SimpleNamespace:
    return SimpleNamespace(id="eu-1")


# ---------------------------------------------------------------------------
# RemoteFileInfoApi
# ---------------------------------------------------------------------------
class TestRemoteFileInfoApi:
    @patch("controllers.web.remote_files.ssrf_proxy")
    def test_head_success(self, mock_proxy: MagicMock, app: Flask) -> None:
        mock_resp = MagicMock()
        mock_resp.status_code = 200
        mock_resp.headers = {"Content-Type": "application/pdf", "Content-Length": "1024"}
        mock_proxy.head.return_value = mock_resp

        with app.test_request_context("/remote-files/https%3A%2F%2Fexample.com%2Ffile.pdf"):
            result = RemoteFileInfoApi().get(_app_model(), _end_user(), "https%3A%2F%2Fexample.com%2Ffile.pdf")

        assert result["file_type"] == "application/pdf"
        assert result["file_length"] == 1024

    @patch("controllers.web.remote_files.ssrf_proxy")
    def test_fallback_to_get(self, mock_proxy: MagicMock, app: Flask) -> None:
        head_resp = MagicMock()
        head_resp.status_code = 405  # Method not allowed
        get_resp = MagicMock()
        get_resp.status_code = 200
        get_resp.headers = {"Content-Type": "text/plain", "Content-Length": "42"}
        get_resp.raise_for_status = MagicMock()
        mock_proxy.head.return_value = head_resp
        mock_proxy.get.return_value = get_resp

        with app.test_request_context("/remote-files/https%3A%2F%2Fexample.com%2Ffile.txt"):
            result = RemoteFileInfoApi().get(_app_model(), _end_user(), "https%3A%2F%2Fexample.com%2Ffile.txt")

        assert result["file_type"] == "text/plain"
        mock_proxy.get.assert_called_once()


# ---------------------------------------------------------------------------
# RemoteFileUploadApi
# ---------------------------------------------------------------------------
class TestRemoteFileUploadApi:
    @patch("controllers.web.remote_files.file_helpers.get_signed_file_url", return_value="https://signed-url")
    @patch("controllers.web.remote_files.FileService")
    @patch("controllers.web.remote_files.helpers.guess_file_info_from_response")
    @patch("controllers.web.remote_files.ssrf_proxy")
    @patch("controllers.web.remote_files.web_ns")
    @patch("controllers.web.remote_files.db")
    def test_upload_success(
        self,
        mock_db: MagicMock,
        mock_ns: MagicMock,
        mock_proxy: MagicMock,
        mock_guess: MagicMock,
        mock_file_svc_cls: MagicMock,
        mock_signed: MagicMock,
        app: Flask,
    ) -> None:
        mock_db.engine = "engine"
        mock_ns.payload = {"url": "https://example.com/file.pdf"}
        head_resp = MagicMock()
        head_resp.status_code = 200
        head_resp.content = b"pdf-content"
        head_resp.request.method = "HEAD"
        mock_proxy.head.return_value = head_resp
        get_resp = MagicMock()
        get_resp.content = b"pdf-content"
        mock_proxy.get.return_value = get_resp

        mock_guess.return_value = SimpleNamespace(
            filename="file.pdf", extension="pdf", mimetype="application/pdf", size=100
        )
        mock_file_svc_cls.is_file_size_within_limit.return_value = True

        from datetime import datetime

        upload_file = SimpleNamespace(
            id="f-1",
            name="file.pdf",
            size=100,
            extension="pdf",
            mime_type="application/pdf",
            created_by="eu-1",
            created_at=datetime(2024, 1, 1),
        )
        mock_file_svc_cls.return_value.upload_file.return_value = upload_file

        with app.test_request_context("/remote-files/upload", method="POST"):
            result, status = RemoteFileUploadApi().post(_app_model(), _end_user())

        assert status == 201
        assert result["id"] == "f-1"

    @patch("controllers.web.remote_files.FileService.is_file_size_within_limit", return_value=False)
    @patch("controllers.web.remote_files.helpers.guess_file_info_from_response")
    @patch("controllers.web.remote_files.ssrf_proxy")
    @patch("controllers.web.remote_files.web_ns")
    def test_file_too_large(
        self,
        mock_ns: MagicMock,
        mock_proxy: MagicMock,
        mock_guess: MagicMock,
        mock_size_check: MagicMock,
        app: Flask,
    ) -> None:
        mock_ns.payload = {"url": "https://example.com/big.zip"}
        head_resp = MagicMock()
        head_resp.status_code = 200
        mock_proxy.head.return_value = head_resp
        mock_guess.return_value = SimpleNamespace(
            filename="big.zip", extension="zip", mimetype="application/zip", size=999999999
        )

        with app.test_request_context("/remote-files/upload", method="POST"):
            with pytest.raises(FileTooLargeError):
                RemoteFileUploadApi().post(_app_model(), _end_user())

    @patch("controllers.web.remote_files.ssrf_proxy")
    @patch("controllers.web.remote_files.web_ns")
    def test_fetch_failure_raises(self, mock_ns: MagicMock, mock_proxy: MagicMock, app: Flask) -> None:
        import httpx

        mock_ns.payload = {"url": "https://example.com/bad"}
        mock_proxy.head.side_effect = httpx.RequestError("connection failed")

        with app.test_request_context("/remote-files/upload", method="POST"):
            with pytest.raises(RemoteFileUploadError):
                RemoteFileUploadApi().post(_app_model(), _end_user())