"""Tests for :mod:`artifactstore.manifest` (ARTIFACT-STORE-WP-0001-T010)."""

from __future__ import annotations

from typing import Any

import cbor2
import pytest
from hypothesis import HealthCheck, given, settings
from hypothesis import strategies as st

from artifactstore.identity import PRIMARY_ALGORITHM, digest_bytes
from artifactstore.manifest import (
    MANIFEST_VERSION,
    FileEntry,
    Manifest,
    Package,
    Provenance,
    RetentionHold,
    RetentionSummary,
    StorageReceipt,
    cbor_from_jcs,
    decode,
    encode,
    jcs_projection,
    manifest_digest,
)


def _sample_manifest(
    *,
    file_count: int = 1,
    holds: int = 0,
    metadata: dict[str, Any] | None = None,
) -> Manifest:
    files = [
        FileEntry(
            id=f"file-{i:04d}",
            relative_path=f"reports/r-{i}.json",
            media_type="application/json",
            size_bytes=42 + i,
            digest_algorithm=PRIMARY_ALGORITHM,
            digest_primary_hex="ab" * 32,
            digest_sha256_hex="cd" * 32,
        )
        for i in range(file_count)
    ]
    receipts = [
        StorageReceipt(
            file_id=f.id,
            backend_id="local",
            content_address=f"{f.digest_algorithm}:{f.digest_primary_hex}",
            retrieval_tier="hot",
            status="recorded",
        )
        for f in files
    ]
    holds_list = [
        RetentionHold(
            hold_id=f"hold-{i:04d}",
            reason="audit-prep",
            actor="ops@example.org",
            applied_at="2026-05-15T12:00:00Z",
        )
        for i in range(holds)
    ]
    return Manifest(
        manifest_version=MANIFEST_VERSION,
        package=Package(
            id="pkg-0001",
            name="guide-board cmis run",
            producer="guide-board",
            subject="kontextual-engine",
            retention_class="raw-evidence",
            status="finalized",
            created_at="2026-05-15T10:00:00Z",
            finalized_at="2026-05-15T11:00:00Z",
            expires_at="2027-05-15T11:00:00Z",
            metadata=metadata if metadata is not None else {},
            metadata_schema_id=None,
        ),
        files=files,
        storage_receipts=receipts,
        retention_summary=RetentionSummary(
            retention_class="raw-evidence",
            expires_at="2027-05-15T11:00:00Z",
            active_holds=holds_list,
            last_retention_event_sequence=None,
        ),
        provenance=Provenance(
            source_commits={"guide-board": "abc1234"},
            tool_versions={"guide-board": "0.1.0"},
            environment={"runner": "ci"},
            ingest_actor="codex",
            ingest_timestamps={"received_at": "2026-05-15T10:00:00Z"},
        ),
    )


def test_cbor_round_trip_simple() -> None:
    m = _sample_manifest(file_count=3, holds=1)
    assert decode(encode(m)) == m


def test_canonical_cbor_is_byte_stable_across_calls() -> None:
    m = _sample_manifest(
        file_count=5,
        holds=0,
        metadata={"zz": "z", "aa": "a", "mm": "m"},
    )
    assert encode(m) == encode(m)


def test_jcs_round_trip_via_cbor() -> None:
    m = _sample_manifest(file_count=2, holds=2, metadata={"key": "value", "n": 7})
    cbor_a = encode(m)
    jcs_bytes = jcs_projection(m)
    cbor_b = cbor_from_jcs(jcs_bytes)
    m_decoded = decode(cbor_b)
    cbor_c = encode(m_decoded)
    assert cbor_a == cbor_c


def test_manifest_digest_is_blake3_of_canonical_cbor() -> None:
    m = _sample_manifest()
    ca = manifest_digest(m)
    expected = digest_bytes(encode(m)).primary.content_address
    assert ca == expected
    assert str(ca).startswith("blake3:")


def test_decode_rejects_non_map_cbor() -> None:
    bad = cbor2.dumps([1, 2, 3], canonical=True)
    with pytest.raises(ValueError):
        decode(bad)


def test_jcs_projection_is_canonical_json() -> None:
    m = _sample_manifest(file_count=1, holds=0, metadata={"b": 2, "a": 1})
    jcs_bytes = jcs_projection(m)
    # JCS sorts object keys lexicographically; verify metadata keys appear
    # in alphabetical order in the serialised output.
    text = jcs_bytes.decode("utf-8")
    assert text.find('"a":1') < text.find('"b":2')


@settings(suppress_health_check=[HealthCheck.too_slow], max_examples=25)
@given(
    file_count=st.integers(min_value=0, max_value=5),
    hold_count=st.integers(min_value=0, max_value=3),
)
def test_property_cbor_round_trip(file_count: int, hold_count: int) -> None:
    m = _sample_manifest(file_count=file_count, holds=hold_count)
    assert decode(encode(m)) == m


@settings(suppress_health_check=[HealthCheck.too_slow], max_examples=25)
@given(
    file_count=st.integers(min_value=0, max_value=3),
    hold_count=st.integers(min_value=0, max_value=2),
)
def test_property_jcs_to_cbor_round_trip(file_count: int, hold_count: int) -> None:
    m = _sample_manifest(file_count=file_count, holds=hold_count)
    cbor_a = encode(m)
    cbor_b = cbor_from_jcs(jcs_projection(m))
    cbor_c = encode(decode(cbor_b))
    assert cbor_a == cbor_c