"""Comprehensive tests for spark.memory module.

Covers:
- SparkEvent / SparkMemory dataclasses
- _get_conn (schema creation, WAL, busy timeout, idempotent indexes)
- score_importance (all event types, boosts, edge cases)
- record_event (auto-importance, explicit importance, invalid JSON, swarm bridge)
- get_events (all filters, ordering, limit)
- count_events (total, by type)
- store_memory (with/without expiry)
- get_memories (all filters)
- count_memories (total, by type)
"""

import json

import pytest

from spark.memory import (
    IMPORTANCE_HIGH,
    IMPORTANCE_LOW,
    IMPORTANCE_MEDIUM,
    SparkEvent,
    SparkMemory,
    _get_conn,
    count_events,
    count_memories,
    get_events,
    get_memories,
    record_event,
    score_importance,
    store_memory,
)

# ── Constants ─────────────────────────────────────────────────────────────


class TestConstants:
    def test_importance_ordering(self):
        assert IMPORTANCE_LOW < IMPORTANCE_MEDIUM < IMPORTANCE_HIGH


# ── Dataclasses ───────────────────────────────────────────────────────────


class TestSparkEventDataclass:
    def test_all_fields(self):
        ev = SparkEvent(
            id="1",
            event_type="task_posted",
            agent_id="a1",
            task_id="t1",
            description="Test",
            data="{}",
            importance=0.5,
            created_at="2026-01-01",
        )
        assert ev.event_type == "task_posted"
        assert ev.agent_id == "a1"

    def test_nullable_fields(self):
        ev = SparkEvent(
            id="2",
            event_type="task_posted",
            agent_id=None,
            task_id=None,
            description="",
            data="{}",
            importance=0.5,
            created_at="2026-01-01",
        )
        assert ev.agent_id is None
        assert ev.task_id is None


class TestSparkMemoryDataclass:
    def test_all_fields(self):
        mem = SparkMemory(
            id="1",
            memory_type="pattern",
            subject="system",
            content="Test insight",
            confidence=0.8,
            source_events=5,
            created_at="2026-01-01",
            expires_at="2026-12-31",
        )
        assert mem.memory_type == "pattern"
        assert mem.expires_at == "2026-12-31"

    def test_nullable_expires(self):
        mem = SparkMemory(
            id="2",
            memory_type="anomaly",
            subject="agent-1",
            content="Odd behavior",
            confidence=0.6,
            source_events=3,
            created_at="2026-01-01",
            expires_at=None,
        )
        assert mem.expires_at is None


# ── _get_conn ─────────────────────────────────────────────────────────────


class TestGetConn:
    def test_creates_tables(self):
        with _get_conn() as conn:
            tables = conn.execute("SELECT name FROM sqlite_master WHERE type='table'").fetchall()
            names = {r["name"] for r in tables}
            assert "spark_events" in names
            assert "spark_memories" in names

    def test_wal_mode(self):
        with _get_conn() as conn:
            mode = conn.execute("PRAGMA journal_mode").fetchone()[0]
            assert mode == "wal"

    def test_busy_timeout(self):
        with _get_conn() as conn:
            timeout = conn.execute("PRAGMA busy_timeout").fetchone()[0]
            assert timeout == 5000

    def test_idempotent(self):
        # Calling _get_conn twice should not raise
        with _get_conn():
            pass
        with _get_conn():
            pass


# ── score_importance ──────────────────────────────────────────────────────


class TestScoreImportance:
    @pytest.mark.parametrize(
        "event_type,expected_min,expected_max",
        [
            ("task_posted", 0.3, 0.5),
            ("bid_submitted", 0.1, 0.3),
            ("task_assigned", 0.4, 0.6),
            ("task_completed", 0.5, 0.7),
            ("task_failed", 0.9, 1.0),
            ("agent_joined", 0.4, 0.6),
            ("prediction_result", 0.6, 0.8),
        ],
    )
    def test_base_scores(self, event_type, expected_min, expected_max):
        score = score_importance(event_type, {})
        assert expected_min <= score <= expected_max

    def test_unknown_event_default(self):
        assert score_importance("never_heard_of_this", {}) == 0.5

    def test_failure_boost(self):
        score = score_importance("task_failed", {})
        assert score == 1.0

    def test_high_bid_boost(self):
        low = score_importance("bid_submitted", {"bid_sats": 10})
        high = score_importance("bid_submitted", {"bid_sats": 100})
        assert high > low
        assert high <= 1.0

    def test_high_bid_on_failure(self):
        score = score_importance("task_failed", {"bid_sats": 100})
        assert score == 1.0  # capped at 1.0

    def test_score_always_rounded(self):
        score = score_importance("bid_submitted", {"bid_sats": 100})
        assert score == round(score, 2)


# ── record_event ──────────────────────────────────────────────────────────


class TestRecordEvent:
    def test_basic_record(self):
        eid = record_event("task_posted", "New task", task_id="t1")
        assert isinstance(eid, str)
        assert len(eid) > 0

    def test_auto_importance(self):
        record_event("task_failed", "Failed", task_id="t-auto")
        events = get_events(task_id="t-auto")
        assert events[0].importance >= 0.9

    def test_explicit_importance(self):
        record_event("task_posted", "Custom", task_id="t-expl", importance=0.1)
        events = get_events(task_id="t-expl")
        assert events[0].importance == 0.1

    def test_with_agent_and_data(self):
        data = json.dumps({"bid_sats": 42})
        record_event("bid_submitted", "Bid", agent_id="a1", task_id="t-data", data=data)
        events = get_events(task_id="t-data")
        assert events[0].agent_id == "a1"
        parsed = json.loads(events[0].data)
        assert parsed["bid_sats"] == 42

    def test_invalid_json_data_uses_default_importance(self):
        record_event("task_posted", "Bad data", task_id="t-bad", data="not-json")
        events = get_events(task_id="t-bad")
        assert events[0].importance == 0.4  # base for task_posted

    def test_returns_unique_ids(self):
        id1 = record_event("task_posted", "A")
        id2 = record_event("task_posted", "B")
        assert id1 != id2


# ── get_events ────────────────────────────────────────────────────────────


class TestGetEvents:
    def test_empty_db(self):
        assert get_events() == []

    def test_filter_by_type(self):
        record_event("task_posted", "A")
        record_event("task_completed", "B")
        events = get_events(event_type="task_posted")
        assert len(events) == 1
        assert events[0].event_type == "task_posted"

    def test_filter_by_agent(self):
        record_event("task_posted", "A", agent_id="a1")
        record_event("task_posted", "B", agent_id="a2")
        events = get_events(agent_id="a1")
        assert len(events) == 1
        assert events[0].agent_id == "a1"

    def test_filter_by_task(self):
        record_event("task_posted", "A", task_id="t1")
        record_event("task_posted", "B", task_id="t2")
        events = get_events(task_id="t1")
        assert len(events) == 1

    def test_filter_by_min_importance(self):
        record_event("task_posted", "Low", importance=0.1)
        record_event("task_failed", "High", importance=0.9)
        events = get_events(min_importance=0.5)
        assert len(events) == 1
        assert events[0].importance >= 0.5

    def test_limit(self):
        for i in range(10):
            record_event("task_posted", f"ev{i}")
        events = get_events(limit=3)
        assert len(events) == 3

    def test_order_by_created_desc(self):
        record_event("task_posted", "first", task_id="ord1")
        record_event("task_posted", "second", task_id="ord2")
        events = get_events()
        # Most recent first
        assert events[0].task_id == "ord2"

    def test_combined_filters(self):
        record_event("task_failed", "A", agent_id="a1", task_id="t1", importance=0.9)
        record_event("task_posted", "B", agent_id="a1", task_id="t2", importance=0.4)
        record_event("task_failed", "C", agent_id="a2", task_id="t3", importance=0.9)
        events = get_events(event_type="task_failed", agent_id="a1", min_importance=0.5)
        assert len(events) == 1
        assert events[0].task_id == "t1"


# ── count_events ──────────────────────────────────────────────────────────


class TestCountEvents:
    def test_empty(self):
        assert count_events() == 0

    def test_total(self):
        record_event("task_posted", "A")
        record_event("task_failed", "B")
        assert count_events() == 2

    def test_by_type(self):
        record_event("task_posted", "A")
        record_event("task_posted", "B")
        record_event("task_failed", "C")
        assert count_events("task_posted") == 2
        assert count_events("task_failed") == 1
        assert count_events("task_completed") == 0


# ── store_memory ──────────────────────────────────────────────────────────


class TestStoreMemory:
    def test_basic_store(self):
        mid = store_memory("pattern", "system", "Test insight")
        assert isinstance(mid, str)
        assert len(mid) > 0

    def test_returns_unique_ids(self):
        id1 = store_memory("pattern", "a", "X")
        id2 = store_memory("pattern", "b", "Y")
        assert id1 != id2

    def test_with_all_params(self):
        store_memory(
            "anomaly",
            "agent-1",
            "Odd pattern",
            confidence=0.9,
            source_events=10,
            expires_at="2026-12-31",
        )
        mems = get_memories(subject="agent-1")
        assert len(mems) == 1
        assert mems[0].confidence == 0.9
        assert mems[0].source_events == 10
        assert mems[0].expires_at == "2026-12-31"

    def test_default_values(self):
        store_memory("insight", "sys", "Default test")
        mems = get_memories(subject="sys")
        assert mems[0].confidence == 0.5
        assert mems[0].source_events == 0
        assert mems[0].expires_at is None


# ── get_memories ──────────────────────────────────────────────────────────


class TestGetMemories:
    def test_empty(self):
        assert get_memories() == []

    def test_filter_by_type(self):
        store_memory("pattern", "a", "X")
        store_memory("anomaly", "a", "Y")
        mems = get_memories(memory_type="pattern")
        assert len(mems) == 1
        assert mems[0].memory_type == "pattern"

    def test_filter_by_subject(self):
        store_memory("pattern", "a", "X")
        store_memory("pattern", "b", "Y")
        mems = get_memories(subject="a")
        assert len(mems) == 1

    def test_filter_by_min_confidence(self):
        store_memory("pattern", "a", "Low", confidence=0.2)
        store_memory("pattern", "b", "High", confidence=0.9)
        mems = get_memories(min_confidence=0.5)
        assert len(mems) == 1
        assert mems[0].content == "High"

    def test_limit(self):
        for i in range(10):
            store_memory("pattern", "a", f"M{i}")
        mems = get_memories(limit=3)
        assert len(mems) == 3

    def test_combined_filters(self):
        store_memory("pattern", "a", "Target", confidence=0.9)
        store_memory("anomaly", "a", "Wrong type", confidence=0.9)
        store_memory("pattern", "b", "Wrong subject", confidence=0.9)
        store_memory("pattern", "a", "Low conf", confidence=0.1)
        mems = get_memories(memory_type="pattern", subject="a", min_confidence=0.5)
        assert len(mems) == 1
        assert mems[0].content == "Target"


# ── count_memories ────────────────────────────────────────────────────────


class TestCountMemories:
    def test_empty(self):
        assert count_memories() == 0

    def test_total(self):
        store_memory("pattern", "a", "X")
        store_memory("anomaly", "b", "Y")
        assert count_memories() == 2

    def test_by_type(self):
        store_memory("pattern", "a", "X")
        store_memory("pattern", "b", "Y")
        store_memory("anomaly", "c", "Z")
        assert count_memories("pattern") == 2
        assert count_memories("anomaly") == 1
        assert count_memories("insight") == 0