from __future__ import annotations

from datetime import datetime, timedelta, timezone
from uuid import UUID

from fastapi.testclient import TestClient
from sqlalchemy import create_engine, select
from sqlalchemy.orm import Session
from sqlalchemy.pool import StaticPool

from app.database import Base, get_session
from app.community_importer import stage_observations
from app.importer import ImportAlreadyRunning
from app.main import app
from app.models import Bait, BaitKind, CatchReport, DataSource, ExternalEntityAlias, ExternalObservation, Fish, ImportStatus, ModerationEvent, ModerationStatus, OfficialRecordImport, SourceType, Spot, Waterbody


engine = create_engine("sqlite://", connect_args={"check_same_thread": False}, poolclass=StaticPool)
Base.metadata.create_all(engine)


def override_session():
    with Session(engine) as session:
        yield session


app.dependency_overrides[get_session] = override_session
client = TestClient(app)


def setup_module() -> None:
    with Session(engine) as db:
        waterbody = Waterbody(slug="test-lake", name_ru="Тестовое озеро", unlock_level=1)
        fish = Fish(slug="pike", name_ru="Щука", trophy_weight_g=10_000)
        bait = Bait(name="Тестовая приманка", normalized_name="тестовая приманка", kind=BaitKind.lure)
        spot = Spot(waterbody=waterbody, x=10, y=20, description="Тестовая точка")
        db.add_all([waterbody, fish, bait, spot])
        now = datetime.now(timezone.utc)
        for index in range(3):
            db.add(CatchReport(fish=fish, spot=spot, waterbody=waterbody, bait=bait, weight_g=3000 + index * 1000, fishing_method="spinning", reported_at=now - timedelta(hours=index), caught_at=now - timedelta(hours=index), player_name=f"Player {index}", source_type=SourceType.manual_import, source_confidence=90, moderation_status=ModerationStatus.approved))
        db.commit()


def test_activity_filters_and_explains_score() -> None:
    response = client.get("/api/v1/activity?waterbody=test-lake&fish=pike&hours=24")
    assert response.status_code == 200
    payload = response.json()
    assert len(payload) == 1
    assert payload[0]["catches"] == 3
    assert payload[0]["unique_players"] == 3
    assert "3 свежих улова" in payload[0]["explanation"]
    assert payload[0]["sources"] == ["manual-import"]


def test_invalid_period_is_rejected() -> None:
    assert client.get("/api/v1/activity?hours=13").status_code == 422
    assert client.get("/api/v1/activity?sort=unknown").status_code == 422


def test_list_pagination_and_filter_validation() -> None:
    assert client.get("/api/v1/fishes?limit=0").status_code == 422
    assert client.get("/api/v1/fishes?limit=1&offset=0").status_code == 200
    headers = {"Authorization": "Bearer change-me-in-production"}
    assert client.get("/api/v1/admin/external-observations?status=unknown", headers=headers).status_code == 422
    assert client.get("/api/v1/admin/catch-reports?offset=-1", headers=headers).status_code == 422
    assert client.get("/api/v1/admin/catch-reports?limit=101", headers=headers).status_code == 422


def test_public_source_status_hides_internal_details() -> None:
    with Session(engine) as db:
        if db.get(DataSource, "rf4db") is None:
            db.add(DataSource(key="rf4db", name="RF4DB", base_url="https://rf4db.com", default_confidence=70, enabled=True))
            db.commit()
    response = client.get("/api/v1/source-status")
    assert response.status_code == 200
    assert response.json()
    assert all("error_summary" not in item and "source_url" not in item for item in response.json())


def test_liveness_does_not_probe_dependencies() -> None:
    response = client.get("/health?token=must-not-be-logged")
    assert response.json() == {"status": "ok"}
    assert len(response.headers["X-Request-ID"]) == 32
    assert response.headers["X-Frame-Options"] == "DENY"
    assert response.headers["Cross-Origin-Opener-Policy"] == "same-origin"


def test_admin_diagnostics_exposes_build_identity_only_to_admin() -> None:
    assert client.get("/api/v1/admin/diagnostics").status_code == 401
    response = client.get("/api/v1/admin/diagnostics", headers={"Authorization": "Bearer change-me-in-production"})
    assert response.status_code == 200
    payload = response.json()
    assert payload["build"] == {"version": "0.1.0", "revision": "dev", "environment": "development"}
    assert set(payload) == {"generated_at", "build", "counts"}
    assert response.headers["Content-Disposition"] == "attachment; filename=rf4spotter-diagnostics.json"
    serialized = response.text.lower()
    for forbidden in ("player_name", "source_url", "error_summary", "raw_payload", "admin_token", "s3_"):
        assert forbidden not in serialized


def test_spot_detail_and_catches() -> None:
    spot_id = client.get("/api/v1/activity").json()[0]["spot_id"]
    detail = client.get(f"/api/v1/spots/{spot_id}")
    catches = client.get(f"/api/v1/spots/{spot_id}/catches")
    assert detail.status_code == 200
    assert detail.json()["catches_24h"] == 3
    assert catches.status_code == 200
    assert len(catches.json()) == 3
    assert catches.json()[0]["source_system"] == "manual-import"
    resolved = client.get("/api/v1/spots/resolve?waterbody=test-lake&x=10&y=20")
    assert resolved.status_code == 200
    assert resolved.json()["id"] == spot_id


def test_records_list_is_empty_before_import() -> None:
    response = client.get("/api/v1/records")
    assert response.status_code == 200
    assert response.json() == []


def test_record_category_filter_is_applied_before_pagination() -> None:
    with Session(engine) as db:
        fish = db.scalar(select(Fish).where(Fish.slug == "pike"))
        waterbody = db.scalar(select(Waterbody).where(Waterbody.slug == "test-lake"))
        now = datetime.now(timezone.utc) - timedelta(days=30)
        db.add_all([
            CatchReport(fish=fish, waterbody=waterbody, weight_g=9000, caught_at=now, reported_at=now, source_type=SourceType.official_record, source_confidence=100, moderation_status=ModerationStatus.approved, raw_payload={"category": "other"}),
            CatchReport(fish=fish, waterbody=waterbody, weight_g=8000, caught_at=now - timedelta(days=1), reported_at=now, source_type=SourceType.official_record, source_confidence=100, moderation_status=ModerationStatus.approved, raw_payload={"category": "wanted"}),
        ])
        db.commit()
    response = client.get("/api/v1/records?category=wanted&limit=1")
    assert response.status_code == 200
    assert len(response.json()) == 1
    assert response.json()[0]["category"] == "wanted"


def test_user_report_requires_moderation_before_activity() -> None:
    created = client.post("/api/v1/catch-reports", json={"fish_slug": "pike", "waterbody_slug": "test-lake", "x": 77, "y": 88, "weight_g": 5500, "bait_name": "Новая приманка", "player_name": "Reporter"})
    assert created.status_code == 201
    assert created.headers["Cache-Control"] == "no-store"
    assert created.json()["moderation_status"] == "pending"
    report_id = created.json()["id"]
    headers = {"Authorization": "Bearer change-me-in-production"}
    pending = client.get("/api/v1/admin/catch-reports", headers=headers)
    assert pending.status_code == 200
    assert pending.headers["Cache-Control"] == "no-store"
    assert any(item["id"] == report_id for item in pending.json())
    approved = client.patch(f"/api/v1/admin/catch-reports/{report_id}", headers=headers, json={"status": "approved", "reason": "fixture verified"})
    assert approved.status_code == 200
    activity = client.get("/api/v1/activity?waterbody=test-lake&fish=pike&hours=24").json()
    assert any(item["x"] == 77 and item["catches"] == 1 for item in activity)


def test_admin_requires_token() -> None:
    assert client.get("/api/v1/admin/catch-reports").status_code == 401
    assert client.get("/api/v1/admin/imports").status_code == 401
    assert client.post("/api/v1/admin/imports/official-records").status_code == 401
    assert client.get("/api/v1/admin/external-observations").status_code == 401


def test_external_observation_requires_mapping_and_complete_data_before_publication() -> None:
    with Session(engine) as db:
        stage_observations(db, [{
            "source_system": "rf4db", "source_external_id": "review-complete",
            "source_url": "https://rf4db.com/catches/review-complete", "fish": "Pike external",
            "fish_external_id": "fish-1", "waterbody": "Lake external",
            "waterbody_external_id": "lake-1", "x": 31, "y": 41, "weight_g": 6200,
            "bait": "Тестовая приманка", "player_name": "External Player",
        }])
        observation_id = db.scalar(select(ExternalObservation.id).where(
            ExternalObservation.source_external_id == "review-complete"
        ))
    headers = {"Authorization": "Bearer change-me-in-production"}
    premature = client.post(f"/api/v1/admin/external-observations/{observation_id}/publish", headers=headers)
    assert premature.status_code == 409
    mapped = client.patch(
        f"/api/v1/admin/external-observations/{observation_id}/mapping", headers=headers,
        json={"fish_slug": "pike", "waterbody_slug": "test-lake", "note": "verified fixture"},
    )
    assert mapped.status_code == 200
    assert mapped.json()["status"] == "ready"
    published = client.post(f"/api/v1/admin/external-observations/{observation_id}/publish", headers=headers)
    assert published.status_code == 200
    assert published.json()["status"] == "published"
    repeated = client.post(f"/api/v1/admin/external-observations/{observation_id}/publish", headers=headers)
    assert repeated.json()["catch_report_id"] == published.json()["catch_report_id"]
    with Session(engine) as db:
        observation = db.get(ExternalObservation, observation_id)
        report = db.get(CatchReport, observation.catch_report_id)
        aliases = list(db.scalars(select(ExternalEntityAlias).where(ExternalEntityAlias.source_system == "rf4db")))
        assert report.moderation_status == ModerationStatus.approved
        assert report.raw_payload["provenance"]["source_external_id"] == "review-complete"
        assert {alias.entity_type for alias in aliases} == {"fish", "waterbody"}


def test_incomplete_external_observation_is_publicly_labelled_but_not_counted() -> None:
    with Session(engine) as db:
        stage_observations(db, [{
            "source_system": "rf4db", "source_external_id": "review-incomplete",
            "source_url": "https://rf4db.com/catches/review-incomplete", "fish": "Pike external",
            "waterbody": "Lake external", "x": 32, "y": 42,
        }])
        observation_id = db.scalar(select(ExternalObservation.id).where(
            ExternalObservation.source_external_id == "review-incomplete"
        ))
    public = client.get("/api/v1/community-observations")
    assert public.status_code == 200
    signal = next(item for item in public.json() if item["id"] == str(observation_id))
    assert signal["source_system"] == "rf4db"
    assert signal["quality"] == "incomplete"
    assert signal["missing_fields"] == ["вес"]
    assert all(item["x"] != 32 or item["y"] != 42 for item in client.get("/api/v1/activity").json())
    headers = {"Authorization": "Bearer change-me-in-production"}
    mapped = client.patch(
        f"/api/v1/admin/external-observations/{observation_id}/mapping", headers=headers,
        json={"fish_slug": "pike", "waterbody_slug": "test-lake"},
    )
    assert mapped.json()["status"] == "mapped"
    assert client.post(f"/api/v1/admin/external-observations/{observation_id}/publish", headers=headers).status_code == 409
    rejected = client.patch(
        f"/api/v1/admin/external-observations/{observation_id}/reject", headers=headers,
        json={"reason": "weight is absent"},
    )
    assert rejected.json()["status"] == "rejected"
    assert all(item["id"] != str(observation_id) for item in client.get("/api/v1/community-observations").json())


def test_admin_can_start_and_list_official_import(monkeypatch) -> None:
    def fake_import(db: Session, **_: str) -> OfficialRecordImport:
        run = OfficialRecordImport(
            started_at=datetime.now(timezone.utc),
            finished_at=datetime.now(timezone.utc),
            status=ImportStatus.success,
            source_url="fixture://admin",
            rows_seen=2,
            rows_created=2,
            rows_updated=0,
        )
        db.add(run)
        db.commit()
        db.refresh(run)
        return run

    monkeypatch.setattr("app.main.import_records", fake_import)
    headers = {"Authorization": "Bearer change-me-in-production"}
    started = client.post("/api/v1/admin/imports/official-records", headers=headers)
    assert started.status_code == 201
    assert started.json()["source_url"] == "fixture://admin"
    listed = client.get("/api/v1/admin/imports?limit=1&offset=0", headers=headers)
    assert listed.status_code == 200
    assert listed.json()[0]["id"] == started.json()["id"]
    def busy_import(*args, **kwargs):
        raise ImportAlreadyRunning("official import is already running")

    monkeypatch.setattr("app.main.import_records", busy_import)
    conflict = client.post("/api/v1/admin/imports/official-records", headers=headers)
    assert conflict.status_code == 409


def test_pending_report_accepts_one_validated_screenshot(monkeypatch) -> None:
    created = client.post("/api/v1/catch-reports", json={"fish_slug": "pike", "waterbody_slug": "test-lake", "x": 91, "y": 92, "weight_g": 4200}).json()
    monkeypatch.setattr("app.main.upload_screenshot", lambda raw, **metadata: "reports/test.jpg" if raw == b"image-bytes" and metadata == {"filename": "catch.jpg", "content_type": "image/jpeg"} else "unexpected")
    upload_url = f"/api/v1/catch-reports/{created['id']}/screenshot"
    assert client.post(upload_url, files={"screenshot": ("catch.jpg", b"image-bytes", "image/jpeg")}).status_code == 401
    assert client.post(upload_url, headers={"X-Upload-Token": "wrong"}, files={"screenshot": ("catch.jpg", b"image-bytes", "image/jpeg")}).status_code == 401
    response = client.post(upload_url, headers={"X-Upload-Token": created["screenshot_upload_token"]}, files={"screenshot": ("catch.jpg", b"image-bytes", "image/jpeg")})
    assert response.status_code == 204
    reused = client.post(upload_url, headers={"X-Upload-Token": created["screenshot_upload_token"]}, files={"screenshot": ("catch.jpg", b"image-bytes", "image/jpeg")})
    assert reused.status_code == 401


def test_admin_delete_anonymizes_report_removes_screenshot_and_keeps_audit(monkeypatch) -> None:
    created = client.post("/api/v1/catch-reports", json={"fish_slug": "pike", "waterbody_slug": "test-lake", "x": 93, "y": 94, "weight_g": 4300, "player_name": "Private Player", "source_url": "https://example.test/private", "comment": "private comment"}).json()
    with Session(engine) as db:
        report = db.get(CatchReport, UUID(created["id"]))
        report.screenshot_key = "reports/private.jpg"
        db.commit()
    deleted_keys: list[str] = []
    monkeypatch.setattr("app.main.delete_screenshot", deleted_keys.append)
    headers = {"Authorization": "Bearer change-me-in-production"}
    response = client.delete(f"/api/v1/admin/catch-reports/{created['id']}", headers=headers)
    assert response.status_code == 204
    assert deleted_keys == ["reports/private.jpg"]
    with Session(engine) as db:
        report = db.get(CatchReport, UUID(created["id"]))
        assert report.deleted_at is not None
        assert report.moderation_status == ModerationStatus.rejected
        assert report.player_name is None and report.source_url is None
        assert report.screenshot_key is None and report.raw_payload is None
        event = db.query(ModerationEvent).filter_by(catch_report_id=report.id).order_by(ModerationEvent.created_at.desc()).first()
        assert event is not None
        assert event.reason == "user report deleted and anonymized"
    assert client.delete(f"/api/v1/admin/catch-reports/{created['id']}", headers=headers).status_code == 404