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import uuid
from types import ModuleType

import pytest
import sqlalchemy as sa
from flask import Flask
from flask.testing import FlaskClient

from webmentions_ssg import DATABASE as db
from webmentions_ssg.models import ReceivedWebmention


def test_endpoint_only_accepts_post(
    client: FlaskClient,
) -> None:
    response = client.get("/endpoint")

    assert response.status_code == 405


def test_endpoint_returns_form_errors(
    client: FlaskClient,
) -> None:
    response = client.post(
        "/endpoint",
        data={
            "source": "https://source.example/post",
            "target": "https://example.com/post",
        },
    )

    assert response.status_code == 400

    errors = response.get_json()

    assert errors is not None
    assert "target" in errors


def test_endpoint_creates_webmention(
    app: Flask,
    client: FlaskClient,
    views_module: ModuleType,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    queued: list[uuid.UUID] = []

    monkeypatch.setattr(
        views_module,
        "verify_webmention",
        queued.append,
    )

    source = "https://source.example/post"
    target = "https://dennisfink.me/blog/example/"

    response = client.post(
        "/endpoint",
        data={
            "source": source,
            "target": target,
        },
    )

    assert response.status_code == 201

    with app.app_context():
        webmention = db.session.scalar(sa.select(ReceivedWebmention))

        assert webmention is not None
        assert webmention.source == source
        assert webmention.target == target
        assert webmention.status == "received"
        assert webmention.failure_reason is None

        identifier = webmention.uuid

    assert response.headers["Location"].endswith(str(identifier))

    assert queued == [identifier]


def test_endpoint_is_idempotent(
    app: Flask,
    client: FlaskClient,
    views_module: ModuleType,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    queued: list[uuid.UUID] = []

    monkeypatch.setattr(
        views_module,
        "verify_webmention",
        queued.append,
    )

    data = {
        "source": ("https://source.example/post"),
        "target": ("https://dennisfink.me/blog/example/"),
    }

    first_response = client.post(
        "/endpoint",
        data=data,
    )
    second_response = client.post(
        "/endpoint",
        data=data,
    )

    assert first_response.status_code == 201
    assert second_response.status_code == 201

    assert first_response.headers["Location"] == second_response.headers["Location"]

    with app.app_context():
        webmentions = db.session.scalars(sa.select(ReceivedWebmention)).all()

        assert len(webmentions) == 1

        webmention = webmentions[0]

        assert webmention.source == data["source"]
        assert webmention.target == data["target"]
        assert webmention.status == "received"
        assert webmention.failure_reason is None

        identifier = webmention.uuid

    assert queued == [
        identifier,
        identifier,
    ]


def test_resending_resets_failure_state(
    app: Flask,
    client: FlaskClient,
    views_module: ModuleType,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    monkeypatch.setattr(
        views_module,
        "verify_webmention",
        lambda identifier: None,
    )

    source = "https://source.example/post"
    target = "https://dennisfink.me/blog/example/"

    with app.app_context():
        existing = ReceivedWebmention(
            uuid=uuid.uuid7(),
            source=source,
            target=target,
            status="failed",
            failure_reason="Previous failure",
        )

        db.session.add(existing)
        db.session.commit()

        identifier = existing.uuid

    response = client.post(
        "/endpoint",
        data={
            "source": source,
            "target": target,
        },
    )

    assert response.status_code == 201

    with app.app_context():
        webmention = db.session.get(
            ReceivedWebmention,
            identifier,
        )

        assert webmention is not None
        assert webmention.status == "received"
        assert webmention.failure_reason is None