import json
from io import BytesIO

import pytest
from PIL import Image

from pigway_frame_flow.errors import FlowError
from pigway_frame_flow.providers.photo_sources import PhotoSourceInput


def photo(path):
    path.parent.mkdir(parents=True, exist_ok=True)
    Image.new("RGB", (160, 200), "blue").save(path)
    return path.read_bytes()


@pytest.fixture
def photos(settings, service):
    settings.photo_root = settings.data_dir.parent / "photos"
    photo(settings.photo_root / "family" / "a.jpg")
    photo(settings.photo_root / "family" / "nested" / "b.png")
    photo(settings.photo_root / "family" / "@eaDir" / "thumb.jpg")
    (settings.photo_root / "family" / "note.txt").write_text("not a photo")
    service.photo_sources.save(
        "family", PhotoSourceInput(name="Family", kind="local", location="family")
    )
    return service.photo_sources


def test_local_catalog_filters_and_paginates(client, photos):
    out = client.get("/api/v1/photo-sources/family/images?limit=1").json()
    assert out["total"] == 2 and len(out["items"]) == 1
    assert (
        client.get("/api/v1/photo-sources/family/images?offset=1").json()["items"][0][
            "name"
        ]
        == "b.png"
    )
    assert client.get("/api/v1/photo-sources").json()[0]["id"] == "family"


@pytest.mark.parametrize("location", ["../", "/etc"])
def test_path_escape_forbidden(client, photos, location):
    r = client.put(
        "/api/v1/photo-sources/escape",
        json={"name": "escape", "kind": "local", "location": location},
    )
    assert r.status_code == 403


def test_symlinks_and_post_catalog_swap_are_blocked(photos, settings):
    outside = settings.data_dir.parent / "outside.jpg"
    photo(outside)
    (settings.photo_root / "family" / "link.jpg").symlink_to(outside)
    items = photos.catalog("family", refresh=True)
    assert len(items) == 2
    path = settings.photo_root / "family" / "a.jpg"
    path.unlink()
    path.symlink_to(outside)
    with pytest.raises(FlowError):
        photos.read("family", "family/a.jpg")


def test_random_preview_is_local_and_display_uses_same_asset(client, service, photos):
    before = service.registry.get("living-room").get_current_image()
    r = client.post(
        "/api/v1/devices/living-room/upload",
        json={"type": "photo_source", "source_id": "family"},
    )
    assert r.status_code == 202
    assert service.process_one()
    op = client.get("/api/v1/operations/" + r.json()["operation_id"]).json()
    assert op["status"] == "COMPLETED"
    assert service.registry.get("living-room").get_current_image() == before
    image = client.get(op["result"]["url"])
    assert image.status_code == 200
    assert Image.open(BytesIO(image.content)).size == (1600, 1200)
    r = client.post(
        "/api/v1/display",
        json={"content": {"type": "image", "asset_id": op["result"]["asset_id"]}},
    )
    assert r.status_code == 202 and service.process_one()


def test_scheduler_source_persistence_and_delete_protection(app, client, photos):
    payload = {
        "name": "Random family photo",
        "enabled": False,
        "schedule": {"type": "daily", "time": "08:00"},
        "source": {"type": "photo_source", "source_id": "family"},
    }
    job = client.post("/api/v1/jobs", json=payload)
    assert job.status_code == 201
    assert app.state.scheduler.jobs()[0]["source"]["source_id"] == "family"
    assert client.delete("/api/v1/photo-sources/family").status_code == 409
    assert client.delete("/api/v1/jobs/" + job.json()["id"]).status_code == 204
    assert client.delete("/api/v1/photo-sources/family").status_code == 204


def test_empty_disabled_unknown_item(photos, settings):
    with pytest.raises(FlowError):
        photos.read("family", "../outside.jpg")
    photos.save(
        "family",
        PhotoSourceInput(name="Family", kind="local", location="family", enabled=False),
    )
    with pytest.raises(FlowError):
        photos.read("family")
    folder = settings.photo_root / "empty"
    folder.mkdir()
    photos.save("empty", PhotoSourceInput(name="Empty", kind="local", location="empty"))
    with pytest.raises(FlowError):
        photos.read("empty")


def test_webdav_metadata_cached_credentials_not_persisted(
    service, settings, monkeypatch
):
    settings.image_url_hosts = ["dav.example"]
    credential = "FRAME_FLOW_SOURCE_TEST"
    monkeypatch.setenv(
        credential, json.dumps({"username": "test-user", "password": "test-password"})
    )
    provider = service.photo_sources
    provider.save(
        "dav",
        PhotoSourceInput(
            name="Cloud",
            kind="webdav",
            location="https://dav.example/photos",
            credential_env=credential,
        ),
    )
    calls = []
    xml = b"""<d:multistatus xmlns:d="DAV:"><d:response><d:href>/photos/a.jpg</d:href></d:response><d:response><d:href>/photos/a.jpg</d:href></d:response><d:response><d:href>https://evil.example/a.jpg</d:href></d:response><d:response><d:href>/photos/%2e%2e/private.jpg</d:href></d:response><d:response><d:href>/photos/sub</d:href><d:propstat><d:prop><d:resourcetype><d:collection/></d:resourcetype></d:prop></d:propstat></d:response></d:multistatus>"""

    def fetch(url, **kwargs):
        calls.append((url, kwargs))
        return xml if kwargs.get("method") == "PROPFIND" else b"photo"

    monkeypatch.setattr(service.assets, "fetch_url", fetch)
    items = provider.catalog("dav")
    assert len(items) == 1
    assert provider.catalog("dav") == items and len(calls) == 1
    assert calls[0][1]["headers"]["Depth"] == "1"
    assert provider.read("dav")[0] == b"photo"
    assert provider.get("dav").recursive is False
    stored = service.db.one(
        "SELECT payload FROM app_config WHERE key='photo_source:dav'"
    )["payload"]
    assert "test-password" not in stored and "test-user" not in stored
    assert "test-password" not in json.dumps(
        settings.sanitize({"value": "test-password"})
    )


@pytest.mark.parametrize("xml", [b"<!DOCTYPE x><x/>", b"<broken"])
def test_webdav_bad_xml(service, settings, monkeypatch, xml):
    settings.image_url_hosts = ["dav.example"]
    provider = service.photo_sources
    provider.save(
        "dav",
        PhotoSourceInput(
            name="Cloud", kind="webdav", location="https://dav.example/photos/"
        ),
    )
    monkeypatch.setattr(service.assets, "fetch_url", lambda *a, **kw: xml)
    with pytest.raises(FlowError):
        provider.catalog("dav")


def test_photo_source_permissions_and_openapi(client, photos):
    schema = client.get("/openapi.json").json()
    assert "PhotoSourceContent" in schema["components"]["schemas"]
    assert schema["paths"]["/api/v1/photo-sources"]["get"]["responses"]["200"][
        "content"
    ]["application/json"]["schema"]["items"]["$ref"].endswith("PhotoSourceView")
    client.headers["Authorization"] = "Bearer incorrect"
    assert client.get("/api/v1/photo-sources").status_code == 401


def test_scheduled_random_photo_runs_once_with_restore(app, service, photos):
    from datetime import datetime

    from pigway_frame_flow.models import JobInput

    scheduler = app.state.scheduler
    original = service.registry.get("living-room").get_current_image()
    job = scheduler.save_job(
        JobInput(
            name="Random",
            schedule={"type": "daily", "time": "08:00"},
            source={"type": "photo_source", "source_id": "family"},
            display_duration=60,
            restore_previous=True,
        )
    )
    at = datetime.fromisoformat(job["next_run"])
    scheduler.tick(at)
    scheduler.tick(at)
    rows = service.db.all("SELECT * FROM operations WHERE client_id='scheduler'")
    assert len(rows) == 1
    assert service.process_one()
    op = service.operation(rows[0]["id"])
    assert op["status"] in ("SYNCING", "COMPLETED")
    assert service.state("living-room")["previous_image_id"] == original


def test_unreadable_source_is_forbidden_not_empty(
    client, photos, settings, monkeypatch
):
    import os

    original = os.scandir

    def restricted(path):
        if str(path) == str(settings.photo_root / "family"):
            raise PermissionError("permission denied")
        return original(path)

    monkeypatch.setattr(os, "scandir", restricted)
    response = client.get("/api/v1/photo-sources/family/images")
    assert response.status_code == 403
    assert response.json()["error"]["code"] == "FORBIDDEN"