"""integrations/registry.py 厂商集成目录注册表单元测试。

覆盖 register / filter_integrations / list_integrations / count_integrations /
get_integration / get_integration_or_raise / list_adapter_types / clear。
全局状态（_integrations）通过 _snapshot_registry fixture 在测试后恢复。
"""

from __future__ import annotations

from typing import Any

import pytest

from yuxi.external_systems.exceptions import (
    DomainValidationError,
    EntityNotFoundError,
)
from yuxi.external_systems.integrations.registry import IntegrationRegistry
from yuxi.external_systems.integrations.schemas import IntegrationMetadata


# ─── 全局状态快照 fixture ─────────────────────────────────────────────────


@pytest.fixture
def _snapshot_registry():
    """保存并恢复 _integrations，避免污染其他测试。"""
    saved = dict(IntegrationRegistry._integrations)
    IntegrationRegistry._integrations.clear()
    try:
        yield
    finally:
        IntegrationRegistry._integrations.clear()
        IntegrationRegistry._integrations.update(saved)


# ─── 辅助构造 ─────────────────────────────────────────────────────────────


def _make_metadata(**overrides: Any) -> IntegrationMetadata:
    """构造测试用 IntegrationMetadata。"""
    base: dict[str, Any] = {
        "key": "test",
        "display_name": "Test Integration",
        "description": "A test integration",
        "adapter_type": "http",
        "source_types": ["test"],
    }
    base.update(overrides)
    return IntegrationMetadata(**base)


# ─── register ─────────────────────────────────────────────────────────────


@pytest.mark.unit
def test_register_adds_metadata_to_registry(_snapshot_registry):
    # Arrange
    meta = _make_metadata(key="salesforce")

    # Act
    IntegrationRegistry.register(meta)

    # Assert
    assert IntegrationRegistry.get_integration("salesforce") is meta


@pytest.mark.unit
def test_register_idempotent_with_same_instance(_snapshot_registry):
    # Arrange
    meta = _make_metadata(key="salesforce")
    IntegrationRegistry.register(meta)

    # Act - 同一实例重复注册不应抛异常
    IntegrationRegistry.register(meta)

    # Assert
    assert IntegrationRegistry.get_integration("salesforce") is meta


@pytest.mark.unit
def test_register_conflict_with_different_instance_raises(_snapshot_registry):
    # Arrange
    first = _make_metadata(key="salesforce", display_name="First")
    IntegrationRegistry.register(first)
    second = _make_metadata(key="salesforce", display_name="Second")

    # Act / Assert - 不同实例重复注册应抛 DomainValidationError
    with pytest.raises(DomainValidationError) as exc_info:
        IntegrationRegistry.register(second)
    assert "salesforce" in str(exc_info.value)
    assert "First" in str(exc_info.value)
    assert "Second" in str(exc_info.value)
    # 原注册项保留
    assert IntegrationRegistry.get_integration("salesforce") is first


# ─── filter_integrations ──────────────────────────────────────────────────


@pytest.mark.unit
def test_filterIntegrations_returns_all_sorted_by_key(_snapshot_registry):
    # Arrange - 故意乱序注册
    IntegrationRegistry.register(_make_metadata(key="zoho"))
    IntegrationRegistry.register(_make_metadata(key="apple"))
    IntegrationRegistry.register(_make_metadata(key="microsoft"))

    # Act
    result = IntegrationRegistry.filter_integrations()

    # Assert - 按 key 升序稳定排序
    assert [it.key for it in result] == ["apple", "microsoft", "zoho"]


@pytest.mark.unit
def test_filterIntegrations_by_adapter_type(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf", adapter_type="http"))
    IntegrationRegistry.register(_make_metadata(key="grpc_pkg", adapter_type="grpc"))
    IntegrationRegistry.register(_make_metadata(key="hub", adapter_type="http"))

    # Act
    result = IntegrationRegistry.filter_integrations(adapter_type="http")

    # Assert - 精确匹配 adapter_type
    assert [it.key for it in result] == ["hub", "sf"]


@pytest.mark.unit
def test_filterIntegrations_by_tags_or_relation(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf", tags=["crm", "sales"]))
    IntegrationRegistry.register(_make_metadata(key="slack", tags=["messaging"]))
    IntegrationRegistry.register(_make_metadata(key="hub", tags=["crm", "marketing"]))

    # Act - 命中任一标签即返回（OR 关系）
    result = IntegrationRegistry.filter_integrations(tags=["sales", "messaging"])

    # Assert
    assert [it.key for it in result] == ["sf", "slack"]


@pytest.mark.unit
def test_filterIntegrations_by_keyword_case_insensitive(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf", display_name="Salesforce"))
    IntegrationRegistry.register(_make_metadata(key="hub", display_name="HubSpot"))

    # Act - 大小写不敏感匹配 display_name
    result = IntegrationRegistry.filter_integrations(keyword="SALES")

    # Assert
    assert [it.key for it in result] == ["sf"]


@pytest.mark.unit
def test_filterIntegrations_by_keyword_matches_description(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf", display_name="SF", description="CRM platform"))
    IntegrationRegistry.register(_make_metadata(key="slack", display_name="Slack", description="Chat tool"))

    # Act - 关键词匹配 description
    result = IntegrationRegistry.filter_integrations(keyword="crm")

    # Assert
    assert [it.key for it in result] == ["sf"]


@pytest.mark.unit
def test_filterIntegrations_combined_filters(_snapshot_registry):
    # Arrange - sf/hub 同时满足三条件，slack 仅满足 adapter_type+keyword 不满足 tags
    IntegrationRegistry.register(
        _make_metadata(key="sf", adapter_type="http", tags=["crm"], display_name="Salesforce CRM")
    )
    IntegrationRegistry.register(
        _make_metadata(key="hub", adapter_type="http", tags=["crm"], display_name="HubSpot CRM")
    )
    IntegrationRegistry.register(
        _make_metadata(key="slack", adapter_type="http", tags=["messaging"], display_name="Slack CRM")
    )

    # Act - adapter_type + tags + keyword 组合（AND 关系）
    result = IntegrationRegistry.filter_integrations(adapter_type="http", tags=["crm"], keyword="crm")

    # Assert - 同时满足所有条件：sf/hub 命中，slack 因 tags 不匹配被排除
    assert [it.key for it in result] == ["hub", "sf"]


@pytest.mark.unit
def test_filterIntegrations_empty_when_no_match(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf"))

    # Act
    result = IntegrationRegistry.filter_integrations(keyword="nonexistent")

    # Assert
    assert result == []


@pytest.mark.unit
def test_filterIntegrations_tolerates_none_fields(_snapshot_registry):
    # Arrange - 模拟注册包异常导致字段为空，确保过滤不抛 500
    meta = _make_metadata(key="sf", display_name="Salesforce")
    IntegrationRegistry.register(meta)
    meta.description = None
    meta.tags = None

    # Act / Assert - keyword/tags 过滤均不应崩溃
    result_by_keyword = IntegrationRegistry.filter_integrations(keyword="sales")
    result_by_tags = IntegrationRegistry.filter_integrations(tags=["crm"])

    assert [it.key for it in result_by_keyword] == ["sf"]
    assert result_by_tags == []


# ─── list_integrations ────────────────────────────────────────────────────


@pytest.mark.unit
def test_listIntegrations_paginates_results(_snapshot_registry):
    # Arrange
    for k in ("a", "b", "c", "d", "e"):
        IntegrationRegistry.register(_make_metadata(key=k))

    # Act - 第 2 页，每页 2 条
    result = IntegrationRegistry.list_integrations(limit=2, offset=2)

    # Assert
    assert [it.key for it in result] == ["c", "d"]


@pytest.mark.unit
def test_listIntegrations_offset_negative_clamped_to_zero(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf"))

    # Act - offset 为负数应归零
    result = IntegrationRegistry.list_integrations(limit=10, offset=-5)

    # Assert
    assert [it.key for it in result] == ["sf"]


@pytest.mark.unit
def test_listIntegrations_limit_negative_clamped_to_zero(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf"))

    # Act - limit 为负数应归零，返回空列表
    result = IntegrationRegistry.list_integrations(limit=-1, offset=0)

    # Assert
    assert result == []


@pytest.mark.unit
def test_listIntegrations_offset_beyond_length_returns_empty(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf"))

    # Act - offset 超过总数
    result = IntegrationRegistry.list_integrations(limit=10, offset=100)

    # Assert
    assert result == []


@pytest.mark.unit
def test_listIntegrations_defaults_limit50_offset0(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf"))

    # Act - 不传分页参数
    result = IntegrationRegistry.list_integrations()

    # Assert
    assert [it.key for it in result] == ["sf"]


# ─── count_integrations ───────────────────────────────────────────────────


@pytest.mark.unit
def test_countIntegrations_returns_total(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf"))
    IntegrationRegistry.register(_make_metadata(key="hub"))

    # Act
    total = IntegrationRegistry.count_integrations()

    # Assert
    assert total == 2


@pytest.mark.unit
def test_countIntegrations_respects_filters(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf", adapter_type="http"))
    IntegrationRegistry.register(_make_metadata(key="grpc_pkg", adapter_type="grpc"))

    # Act
    total = IntegrationRegistry.count_integrations(adapter_type="http")

    # Assert
    assert total == 1


@pytest.mark.unit
def test_countIntegrations_zero_when_no_match(_snapshot_registry):
    # Arrange / Act / Assert
    assert IntegrationRegistry.count_integrations(keyword="nonexistent") == 0


# ─── get_integration ─────────────────────────────────────────────────────


@pytest.mark.unit
def test_getIntegration_returns_metadata(_snapshot_registry):
    # Arrange
    meta = _make_metadata(key="salesforce")
    IntegrationRegistry.register(meta)

    # Act
    result = IntegrationRegistry.get_integration("salesforce")

    # Assert
    assert result is meta


@pytest.mark.unit
def test_getIntegration_unknown_returns_none(_snapshot_registry):
    # Arrange / Act / Assert
    assert IntegrationRegistry.get_integration("nonexistent") is None


# ─── get_integration_or_raise ──────────────────────────────────────────────


@pytest.mark.unit
def test_getIntegrationOrRaise_returns_metadata(_snapshot_registry):
    # Arrange
    meta = _make_metadata(key="salesforce")
    IntegrationRegistry.register(meta)

    # Act
    result = IntegrationRegistry.get_integration_or_raise("salesforce")

    # Assert
    assert result is meta


@pytest.mark.unit
def test_getIntegrationOrRaise_unknown_raises_entityNotFoundError(_snapshot_registry):
    # Arrange / Act / Assert
    with pytest.raises(EntityNotFoundError) as exc_info:
        IntegrationRegistry.get_integration_or_raise("nonexistent")
    assert "nonexistent" in str(exc_info.value)


# ─── list_adapter_types ───────────────────────────────────────────────────


@pytest.mark.unit
def test_listAdapterTypes_returns_dedup_types(_snapshot_registry):
    # Arrange - 多个集成共用 adapter_type
    IntegrationRegistry.register(_make_metadata(key="sf", adapter_type="http"))
    IntegrationRegistry.register(_make_metadata(key="hub", adapter_type="http"))
    IntegrationRegistry.register(_make_metadata(key="grpc_pkg", adapter_type="grpc"))

    # Act
    types = IntegrationRegistry.list_adapter_types()

    # Assert - 去重后按字母升序排序返回
    assert types == ["grpc", "http"]


@pytest.mark.unit
def test_listAdapterTypes_empty_when_nothing_registered(_snapshot_registry):
    # Arrange / Act / Assert
    assert IntegrationRegistry.list_adapter_types() == []


# ─── clear ────────────────────────────────────────────────────────────────


@pytest.mark.unit
def test_clear_empties_integrations(_snapshot_registry):
    # Arrange
    IntegrationRegistry.register(_make_metadata(key="sf"))

    # Act
    IntegrationRegistry.clear()

    # Assert
    assert IntegrationRegistry.list_adapter_types() == []
    assert IntegrationRegistry.get_integration("sf") is None
    assert IntegrationRegistry.count_integrations() == 0


@pytest.mark.unit
def test_clear_safe_when_already_empty(_snapshot_registry):
    # Arrange / Act / Assert - 空注册表清空不抛异常
    IntegrationRegistry.clear()
    assert IntegrationRegistry.count_integrations() == 0