"""Tests for --root-path URL prefix support."""

import argparse
from collections.abc import Generator
from pathlib import Path

import pytest
from httpx import ASGITransport, AsyncClient

import main


@pytest.fixture
def args_directory_with_root(
    sample_files: dict[str, Path], tmp_path: Path
) -> argparse.Namespace:
    """Argparse namespace with root_path set."""
    return argparse.Namespace(
        source=str(tmp_path),
        host="127.0.0.1",
        port=0,
        salt="test-salt",
        navigate=False,
        root_path="/images",
    )


@pytest.fixture
def initialized_dir_with_root(args_directory_with_root: argparse.Namespace) -> None:
    """Initialize the server with sample directory files and root_path."""
    main.initialize_server(args_directory_with_root)


@pytest.fixture
async def client_dir_with_root(
    initialized_dir_with_root: None,
) -> Generator[AsyncClient]:
    """Async HTTP client against the app initialized with root_path."""
    transport = ASGITransport(app=main.app)
    async with AsyncClient(transport=transport, base_url="http://test") as ac:
        yield ac


class TestRootPathGlobal:
    """Tests that root_path is set correctly on initialization."""

    def test_root_path_set_from_args(self, args_directory_with_root):
        """root_path global is set from args."""
        main.initialize_server(args_directory_with_root)
        assert main.root_path == "/images"

    def test_root_path_normalized(self, sample_files, tmp_path):
        """root_path is normalized (leading/trailing slashes handled)."""
        args = argparse.Namespace(
            source=str(tmp_path),
            host="127.0.0.1",
            port=0,
            salt="test-salt",
            navigate=False,
            root_path="images/",
        )
        main.initialize_server(args)
        assert main.root_path == "/images"

    def test_root_path_empty_when_not_provided(self, args_directory):
        """root_path is empty string when not provided."""
        main.initialize_server(args_directory)
        assert main.root_path == ""

    def test_app_root_path_set(self, args_directory_with_root):
        """FastAPI app.root_path is set for proper URL generation."""
        main.initialize_server(args_directory_with_root)
        assert main.app.root_path == "/images"


class TestRootPathURLBuilders:
    """Tests that URL builder functions include root_path."""

    def test_build_url_includes_root_path(self, initialized_dir_with_root):
        """_build_url includes root_path prefix."""
        url = main._build_url("abc123")
        assert url == "/images/abc123"

    def test_build_url_with_params_includes_root_path(self, initialized_dir_with_root):
        """_build_url with order/delay includes root_path prefix."""
        url = main._build_url("abc123", order="next", delay=5)
        assert url == "/images/abc123?order=next&delay=5"

    def test_build_navigate_url_includes_root_path(self, initialized_dir_with_root):
        """_build_navigate_url includes root_path prefix."""
        url = main._build_navigate_url("folder/file.txt")
        assert url == "/images/navigate/folder/file.txt"

    def test_build_navigate_url_with_params_includes_root_path(
        self, initialized_dir_with_root
    ):
        """_build_navigate_url with order/delay includes root_path prefix."""
        url = main._build_navigate_url("folder/file.txt", order="random", delay=3)
        assert url == "/images/navigate/folder/file.txt?order=random&delay=3"

    def test_build_url_no_root_when_empty(self, initialized_dir):
        """_build_url has no prefix when root_path is empty."""
        url = main._build_url("abc123")
        assert url == "/abc123"


class TestRootPathEndpoints:
    """Tests that endpoint responses include root_path in URLs."""

    async def test_root_redirect_includes_root_path(
        self, client_dir_with_root: AsyncClient
    ):
        """Root redirect location includes root_path."""
        response = await client_dir_with_root.get("/", follow_redirects=False)
        assert response.status_code == 307
        location = response.headers["location"]
        assert location.startswith("/images/")

    async def test_root_redirect_with_params_includes_root_path(
        self, client_dir_with_root: AsyncClient
    ):
        """Root redirect with order/delay includes root_path."""
        response = await client_dir_with_root.get(
            "/", params={"order": "next", "delay": 5}, follow_redirects=False
        )
        assert response.status_code == 307
        location = response.headers["location"]
        assert location.startswith("/images/")
        assert "order=next" in location
        assert "delay=5" in location

    async def test_hash_page_image_url_includes_root_path(
        self, client_dir_with_root: AsyncClient
    ):
        """Hash page img_url includes root_path."""
        file_hash = list(main.file_mapping.keys())[0]
        response = await client_dir_with_root.get(f"/{file_hash}")
        assert response.status_code == 200
        assert "/images/api/" in response.text

    async def test_hash_page_nav_urls_include_root_path(
        self, client_dir_with_root: AsyncClient
    ):
        """Hash page prev/next URLs include root_path."""
        file_hash = list(main.file_mapping.keys())[0]
        response = await client_dir_with_root.get(f"/{file_hash}")
        assert response.status_code == 200
        # Check that chevron links use root_path
        import re

        # Find href values on chevron elements
        chevrons = re.findall(
            r'class="chevron (left|right)"[^>]*href="([^"]*)"', response.text
        )
        for direction, href in chevrons:
            assert href.startswith(
                "/images/"
            ), f"Chevron {direction} href {href} missing root_path"

    async def test_hash_page_play_button_includes_root_path(
        self, client_dir_with_root: AsyncClient
    ):
        """Hash page play button URL includes root_path."""
        file_hash = list(main.file_mapping.keys())[0]
        response = await client_dir_with_root.get(f"/{file_hash}")
        assert response.status_code == 200
        # Play button should have root_path in its href
        assert "/images/" in response.text

    async def test_hash_page_refresh_includes_root_path(
        self, client_dir_with_root: AsyncClient
    ):
        """Hash page in refresh mode includes root_path in meta refresh."""
        file_hash = list(main.file_mapping.keys())[0]
        response = await client_dir_with_root.get(
            f"/{file_hash}", params={"order": "next", "delay": 5}
        )
        assert response.status_code == 200
        assert 'http-equiv="refresh"' in response.text
        # The refresh URL should include root_path
        assert "/images/" in response.text