import json
from datetime import UTC, datetime, timedelta

import pytest
from test_display import submit

from pigway_frame_flow.errors import ErrorCode, FlowError


def lose_response(service, monkeypatch, change_display=True):
    driver = service.registry.get("living-room")
    upload = driver.upload

    def uncertain(path, name):
        upload(path, name)
        if not change_display:
            driver.client.display(1)
        raise FlowError(
            ErrorCode.WRITE_RESULT_UNKNOWN, "Cloud write outcome is unknown", 502
        )

    monkeypatch.setattr(driver, "upload", uncertain)
    operation = submit(service)
    service.process_one()
    assert service.operation(operation)["status"] == "UNKNOWN"
    return operation, driver


def test_lost_upload_response_resolves_by_exact_bytes_without_reupload(
    service, monkeypatch
):
    operation, driver = lose_response(service, monkeypatch)
    service.sync()
    assert service.operation(operation)["status"] == "COMPLETED"
    assert service.operation(operation)["result"]["image_id"] == 2
    assert driver.client.uploads == 1
    assert not service.blocked("living-room")


def test_same_name_wrong_bytes_does_not_unlock(service, monkeypatch):
    operation, driver = lose_response(service, monkeypatch)
    monkeypatch.setattr(driver, "download", lambda _: b"unrelated")
    service.sync()
    assert service.operation(operation)["status"] == "UNKNOWN"
    assert service.blocked("living-room")
    assert driver.client.uploads == 1


def test_ambiguous_gallery_does_not_download_or_unlock(service, monkeypatch):
    operation, driver = lose_response(service, monkeypatch)
    driver.client.state["images"].append(dict(driver.client.state["images"][-1], id=3))
    monkeypatch.setattr(driver, "download", lambda _: pytest.fail("Ambiguous download"))
    service.sync()
    assert service.operation(operation)["status"] == "UNKNOWN"


def test_confirmed_upload_not_displayed_closes_failed_display_after_stable_checks(
    service, monkeypatch
):
    operation, driver = lose_response(service, monkeypatch, change_display=False)
    service.sync()
    result = service.operation(operation)["result"]
    assert result["upload_confirmed"]
    start = datetime.fromisoformat(result["upload_intent"]["started_at"])
    import pigway_frame_flow.display.upload_reconciliation as module

    class Later(datetime):
        @classmethod
        def now(cls, tz=None):
            return start + timedelta(seconds=service.settings.sync_timeout + 600)

    monkeypatch.setattr(module, "datetime", Later)
    service.unknown_checked.clear()
    service.sync()
    assert service.operation(operation)["status"] == "UNKNOWN"
    result = service.operation(operation)["result"]
    result["unchanged_observed_at"] = (
        datetime.now(UTC) - timedelta(seconds=61)
    ).isoformat()
    service.db.execute(
        "UPDATE operations SET result=? WHERE id=?", (json.dumps(result), operation)
    )
    service.unknown_checked.clear()
    service.sync()
    assert service.operation(operation)["status"] == "FAILED"
    assert service.operation(operation)["error"]["code"] == "DISPLAY_NOT_CONFIRMED"
    assert not service.blocked("living-room")
    assert driver.client.uploads == 1


def test_legacy_unknown_without_intent_remains_locked(service):
    operation = submit(service)
    service._start_write(operation)
    service.update(operation, "UNKNOWN")
    service.sync()
    assert service.blocked("living-room")


def test_recovered_upload_preserves_temporary_restore(service, monkeypatch):
    driver = service.registry.get("living-room")
    upload = driver.upload

    def uncertain(path, name):
        upload(path, name)
        raise FlowError(ErrorCode.WRITE_RESULT_UNKNOWN, "Response lost", 502)

    monkeypatch.setattr(driver, "upload", uncertain)
    operation = submit(service, duration=60, restore=True)
    service.process_one()
    service.sync()
    assert service.operation(operation)["status"] == "COMPLETED"
    assert service.top("living-room")["id"] == operation
    assert service.state("living-room")["managed_image_id"] == 2