from __future__ import annotations

from datetime import UTC, datetime
from types import SimpleNamespace

import pytest

from govoplan_campaign.backend.persistence.campaigns import (
    CampaignPersistenceError,
)
from govoplan_campaign.backend.persistence.versions import (
    _normalize_review_issue_decisions,
)


def test_attachment_ask_requires_reason_and_freezes_evidence() -> None:
    job = _job(
        issues=[
            {
                "code": "missing_optional_attachment",
                "behavior": "ask",
                "source": "attachments",
                "details": {
                    "effective_policy": {
                        "effective_behavior": "ask",
                    }
                },
            }
        ]
    )

    with pytest.raises(
        CampaignPersistenceError,
        match="require an explicit reason",
    ):
        _normalize_review_issue_decisions(
            [job],
            [],
            user_id="reviewer-1",
            build_token="build-1",
        )

    decisions = _normalize_review_issue_decisions(
        [job],
        [
            {
                "job_id": job.id,
                "decision": "accept",
                "reason": "Recipient confirmed that no attachment is expected.",
            }
        ],
        user_id="reviewer-1",
        build_token="build-1",
        decided_at=datetime(2026, 7, 30, 12, 0, tzinfo=UTC),
    )

    assert decisions == [
        {
            "job_id": "job-1",
            "review_key": "entry-1",
            "decision": "accept",
            "reason": "Recipient confirmed that no attachment is expected.",
            "actor_user_id": "reviewer-1",
            "decided_at": "2026-07-30T12:00:00+00:00",
            "build_token": "build-1",
            "message_sha256": "a" * 64,
            "issue_fingerprint": decisions[0]["issue_fingerprint"],
            "issue_codes": ["missing_optional_attachment"],
        }
    ]
    assert len(decisions[0]["issue_fingerprint"]) == 64


def test_attachment_block_cannot_be_overridden_by_review_decision() -> None:
    job = _job(
        issues=[
            {
                "code": "missing_required_attachment",
                "behavior": "block",
                "source": "attachments",
            }
        ]
    )

    decisions = _normalize_review_issue_decisions(
        [job],
        [],
        user_id="reviewer-1",
        build_token="build-1",
    )

    assert decisions == []


def _job(*, issues: list[dict[str, object]]) -> SimpleNamespace:
    return SimpleNamespace(
        id="job-1",
        entry_id="entry-1",
        entry_index=1,
        validation_status="needs_review",
        issues_snapshot=issues,
        eml_sha256="a" * 64,
    )