import json
import os
import shutil
import threading
import time
from pathlib import Path

import pytest
from werkzeug.serving import make_server

FIXTURES_DIR = Path(__file__).parent / "fixtures"

TINY_PNG = bytes.fromhex(
    "89504e470d0a1a0a0000000d4948445200000001000000010806"
    "0000001f15c4890000000a4944415478016360000000020001e2"
    "21bc330000000049454e44ae426082"
)

MOCK_ALBUMS = [
    {
        "id": "album-1",
        "albumName": "Central Asia 2023",
        "assetCount": 3,
        "albumThumbnailAssetId": "asset-1",
    }
]

MOCK_ALBUM_DETAIL = {
    "id": "album-1",
    "albumName": "Central Asia 2023",
    "assets": [
        {"id": "asset-1", "originalFileName": "IMG_001.jpg",
         "localDateTime": "2023-09-05T09:03:00"},
        {"id": "asset-2", "originalFileName": "IMG_002.jpg",
         "localDateTime": "2023-09-05T14:30:00"},
        {"id": "asset-3", "originalFileName": "IMG_003.jpg",
         "localDateTime": "2023-09-06T10:00:00"},
    ],
}


@pytest.fixture(scope="session")
def httpserver_listen_address():
    return ("127.0.0.1", 8099)


@pytest.fixture(scope="session")
def mock_immich(make_httpserver):
    server = make_httpserver
    server.expect_request("/api/albums").respond_with_json(MOCK_ALBUMS)
    server.expect_request("/api/albums/album-1").respond_with_json(MOCK_ALBUM_DETAIL)
    for asset_id in ["asset-1", "asset-2", "asset-3"]:
        server.expect_request(
            f"/api/assets/{asset_id}/thumbnail"
        ).respond_with_data(TINY_PNG, content_type="image/png")
        server.expect_request(
            f"/api/assets/{asset_id}/original"
        ).respond_with_data(TINY_PNG, content_type="image/jpeg")
    return server


@pytest.fixture(scope="session")
def state_dir(tmp_path_factory):
    return tmp_path_factory.mktemp("state")


@pytest.fixture(scope="session")
def pages_dir(tmp_path_factory):
    return tmp_path_factory.mktemp("pages")


@pytest.fixture(scope="session")
def flask_app(state_dir, pages_dir, mock_immich):
    os.environ["IMMICH_URL"] = f"http://127.0.0.1:8099"
    os.environ["IMMICH_API_KEY"] = "test-key"
    from app import create_app
    return create_app(state_dir=str(state_dir), pages_dir=str(pages_dir))


@pytest.fixture(scope="session")
def base_url(flask_app):
    server = make_server("127.0.0.1", 8083, flask_app)
    t = threading.Thread(target=server.serve_forever)
    t.daemon = True
    t.start()
    time.sleep(0.2)
    yield "http://127.0.0.1:8083"
    server.shutdown()


@pytest.fixture()
def seed_state(state_dir):
    """Copy a fixture JSON into the state dir; return the album_id."""
    def _seed(fixture_name: str) -> str:
        src = FIXTURES_DIR / f"{fixture_name}.json"
        with open(src) as f:
            data = json.load(f)
        dst = Path(state_dir) / f"{data['album_id']}.json"
        shutil.copy(src, dst)
        return data["album_id"]
    return _seed