"""yuxi.channels.adapters.mappers 单元测试。

覆盖 ORM ↔ dataclass 映射函数，包括 ``orm_to_channel_account`` /
``channel_account_for_write`` / ``orm_to_channel_session`` /
``orm_to_pairing`` / ``orm_to_audit_log`` / ``orm_to_outbox_entry`` /
``orm_to_user_identity``，使用 ``patch`` 替换
加解密函数，不依赖真实密钥配置。
"""

from __future__ import annotations

from datetime import date, datetime
from unittest.mock import MagicMock, patch

import pytest
from yuxi.channels.adapters import mappers
from yuxi.channels.contract.dtos.audit import AuditEntry, AuditOperationType
from yuxi.channels.contract.dtos.channel import (
    AccountStatus,
    ChannelAccount,
    ChannelSession,
    ChannelType,
    UserIdentity,
)
from yuxi.channels.contract.dtos.outbox import (
    MessageDurabilityPolicy,
    OutboxEntry,
    OutboxStatus,
)
from yuxi.channels.contract.dtos.pairing import PairingRecord, PairingStatus
from yuxi.channels.contract.dtos.route import RouteBindingRule
from yuxi.channels.contract.errors import DependencyError

pytestmark = pytest.mark.unit


def _make_account_orm() -> MagicMock:
    """构造 ChannelAccount ORM 桩。"""
    orm = MagicMock()
    orm.channel_type = "feishu"
    orm.account_id = "acc-1"
    orm.display_name = "Account 1"
    orm.config = {"token": "enc"}
    orm.enabled = True
    orm.status = "active"
    orm.created_at = datetime(2026, 1, 1)
    orm.updated_at = datetime(2026, 1, 1)
    orm.transport_cursor = "cursor-1"
    orm.last_rotated_at = None
    orm.onboarding_status = "online"
    orm.service_user_uid = None
    orm.credential_ref = None
    orm.credential_version = 0
    orm.last_error = None
    orm.plugin_status = "stopped"
    orm.version = 1
    return orm


def _make_session_orm() -> MagicMock:
    """构造 ChannelSession ORM 桩。"""
    orm = MagicMock()
    orm.session_id = "sess-1"
    orm.channel_type = "feishu"
    orm.account_id = 100
    orm.peer_id = "peer-1"
    orm.chat_type = "p2p"
    orm.conversation_id = 200
    orm.unified_identity_id = "uid-1"
    orm.owner_peer_id = None
    orm.is_temporary = False
    orm.created_at = datetime(2026, 1, 1)
    orm.updated_at = datetime(2026, 1, 1)
    orm.deleted_at = None
    orm.closed_at = None
    orm.last_message_at = None
    return orm


def _make_pairing_orm() -> MagicMock:
    """构造 ChannelPairing ORM 桩。"""
    orm = MagicMock()
    orm.pairing_id = "pair-1"
    orm.account_id = 100
    orm.peer_id = "peer-1"
    orm.status = "pending"
    orm.peer_name = "Peer One"
    orm.approver_id = None
    orm.approved_at = None
    orm.rejected_at = None
    orm.revoked_at = None
    orm.expired_at = None
    orm.reason = None
    orm.created_at = datetime(2026, 1, 1)
    orm.updated_at = datetime(2026, 1, 1)
    orm.expires_at = None
    orm.requested_at = None
    orm.version = 1
    return orm


def _make_audit_orm() -> MagicMock:
    """构造 ChannelAuditLog ORM 桩。"""
    orm = MagicMock()
    orm.operator = "admin-1"
    orm.operation = "account_created"
    orm.target_channel = "feishu"
    orm.result = "success"
    orm.timestamp = datetime(2026, 1, 1)
    orm.params_summary = {"key": "value"}
    orm.trace_id = "trace-1"
    orm.source_ip = "127.0.0.1"
    orm.request_id = "req-1"
    orm.message_id = None
    orm.content_summary = None
    orm.target_account = "acc-1"
    return orm


def _make_outbox_orm() -> MagicMock:
    """构造 ChannelOutboxEntry ORM 桩。"""
    orm = MagicMock()
    orm.outbox_id = 1
    orm.message_id = 500
    orm.account_id = 100
    orm.status = "pending"
    orm.durability_policy = "required"
    orm.retry_count = 0
    orm.max_retry = 3
    orm.next_retry_at = None
    orm.last_error = None
    orm.created_at = datetime(2026, 1, 1)
    orm.updated_at = datetime(2026, 1, 1)
    orm.expires_at = None
    orm.channel_msg_id = None
    orm.version = 1
    orm.channel_session_id = 200
    orm.latency_ms = None
    orm.funnel_node = None
    return orm


def _make_identity_orm() -> MagicMock:
    """构造 ChannelUserIdentity ORM 桩。"""
    orm = MagicMock()
    orm.identity_id = "uid-1"
    orm.user_id = 300
    orm.identity_type = "email"
    orm.identity_value = "user@example.com"
    orm.channel_type = "feishu"
    orm.channel_sender_id = "sender-1"
    orm.source = "explicit_mapping"
    orm.created_at = datetime(2026, 1, 1)
    orm.updated_at = datetime(2026, 1, 1)
    return orm


def _make_route_binding_orm() -> MagicMock:
    """构造 ChannelRouteBinding ORM 桩。"""
    orm = MagicMock()
    orm.binding_id = "bind-1"
    orm.channel_type = "feishu"
    orm.account_id = "acc-1"
    orm.match_source = "session_key"
    orm.match_value = "peer-1"
    orm.agent_binding = "agent-slug"
    orm.enabled = True
    orm.description = "test binding"
    orm.version = 1
    orm.created_by = "admin-1"
    orm.updated_by = "admin-1"
    orm.created_at = datetime(2026, 1, 1)
    orm.updated_at = datetime(2026, 1, 1)
    return orm


@pytest.mark.unit
class TestOrmToChannelAccount:
    def test_returns_channel_account_with_decrypted_config(self):
        # Arrange
        orm = _make_account_orm()

        # Act
        with patch(
            "yuxi.channels.adapters.mappers.decrypt_sensitive_fields",
            return_value={"token": "plain"},
        ):
            result = mappers.orm_to_channel_account(orm)

        # Assert
        assert isinstance(result, ChannelAccount)
        assert result.account_id == "acc-1"
        assert result.config == {"token": "plain"}
        assert result.channel_type == ChannelType("feishu")
        assert result.status == AccountStatus.ACTIVE

    def test_raises_dependency_error_when_decryption_fails(self):
        # Arrange
        orm = _make_account_orm()

        # Act / Assert
        with patch(
            "yuxi.channels.adapters.mappers.decrypt_sensitive_fields",
            side_effect=ValueError("bad key"),
        ):
            with pytest.raises(DependencyError):
                mappers.orm_to_channel_account(orm)


@pytest.mark.unit
class TestChannelAccountForWrite:
    def test_encrypts_config_field(self):
        # Arrange
        data = {"account_id": "acc-1", "config": {"token": "plain"}}

        # Act
        with patch(
            "yuxi.channels.adapters.mappers.encrypt_sensitive_fields",
            return_value={"token": "enc"},
        ) as enc_mock:
            result = mappers.channel_account_for_write(data)

        # Assert
        assert result["config"] == {"token": "enc"}
        enc_mock.assert_called_once_with({"token": "plain"})

    def test_returns_new_dict_without_mutating_input(self):
        # Arrange
        data = {"account_id": "acc-1", "config": {"token": "plain"}}

        # Act
        with patch(
            "yuxi.channels.adapters.mappers.encrypt_sensitive_fields",
            return_value={"token": "enc"},
        ):
            result = mappers.channel_account_for_write(data)

        # Assert
        assert data["config"] == {"token": "plain"}
        assert result is not data


@pytest.mark.unit
class TestOrmToChannelSession:
    def test_returns_channel_session_with_str_ids(self):
        # Arrange
        orm = _make_session_orm()

        # Act
        result = mappers.orm_to_channel_session(orm)

        # Assert
        assert isinstance(result, ChannelSession)
        assert result.session_id == "sess-1"
        assert result.account_id == "100"
        assert result.conversation_id == "200"
        assert result.channel_type == ChannelType("feishu")

    def test_handles_none_conversation_id(self):
        # Arrange
        orm = _make_session_orm()
        orm.conversation_id = None

        # Act
        result = mappers.orm_to_channel_session(orm)

        # Assert
        assert result.conversation_id is None


@pytest.mark.unit
class TestOrmToPairing:
    def test_returns_pairing_record_without_account_orm(self):
        # Arrange
        orm = _make_pairing_orm()

        # Act
        result = mappers.orm_to_pairing(orm)

        # Assert
        assert isinstance(result, PairingRecord)
        assert result.pairing_id == "pair-1"
        assert result.channel_account_id == "100"
        assert result.channel_type is None
        assert result.status == PairingStatus.PENDING

    def test_returns_pairing_record_with_account_orm(self):
        # Arrange
        orm = _make_pairing_orm()
        account_orm = _make_account_orm()

        # Act
        result = mappers.orm_to_pairing(orm, account_orm)

        # Assert
        assert result.channel_account_id == "acc-1"
        assert result.channel_type == ChannelType("feishu")


@pytest.mark.unit
class TestOrmToAuditLog:
    def test_returns_audit_entry(self):
        # Arrange
        orm = _make_audit_orm()

        # Act
        result = mappers.orm_to_audit_log(orm)

        # Assert
        assert isinstance(result, AuditEntry)
        assert result.operator == "admin-1"
        assert result.operation == AuditOperationType.ACCOUNT_CREATED
        assert result.target == "feishu"
        assert result.target_channel == "feishu"


@pytest.mark.unit
class TestOrmToOutboxEntry:
    def test_returns_outbox_entry_with_str_ids(self):
        # Arrange
        orm = _make_outbox_orm()

        # Act
        result = mappers.orm_to_outbox_entry(orm)

        # Assert
        assert isinstance(result, OutboxEntry)
        assert result.outbox_id == 1
        assert result.message_id == "500"
        assert result.channel_account_id == "100"
        assert result.channel_session_id == "200"
        assert result.status == OutboxStatus.PENDING
        assert result.durability_policy == MessageDurabilityPolicy.REQUIRED

    def test_handles_none_channel_session_id(self):
        # Arrange
        orm = _make_outbox_orm()
        orm.channel_session_id = None

        # Act
        result = mappers.orm_to_outbox_entry(orm)

        # Assert
        assert result.channel_session_id is None


@pytest.mark.unit
class TestOrmToUserIdentity:
    def test_returns_user_identity_with_str_user_id(self):
        # Arrange
        orm = _make_identity_orm()

        # Act
        result = mappers.orm_to_user_identity(orm)

        # Assert
        assert isinstance(result, UserIdentity)
        assert result.identity_id == "uid-1"
        assert result.user_id == "300"
        assert result.channel_type == ChannelType("feishu")

    def test_handles_none_user_id(self):
        # Arrange
        orm = _make_identity_orm()
        orm.user_id = None

        # Act
        result = mappers.orm_to_user_identity(orm)

        # Assert
        assert result.user_id is None

    def test_handles_none_channel_type(self):
        # Arrange
        orm = _make_identity_orm()
        orm.channel_type = None

        # Act
        result = mappers.orm_to_user_identity(orm)

        # Assert
        assert result.channel_type is None


@pytest.mark.unit
class TestChannelSessionForWrite:
    """``channel_session_for_write`` 无敏感字段，直接透传 ``dict(data)``。"""

    def test_returns_new_dict_with_same_content(self):
        # Arrange
        data = {"session_id": "sess-1", "peer_id": "peer-1", "is_temporary": False}

        # Act
        result = mappers.channel_session_for_write(data)

        # Assert
        assert result == data
        assert result is not data

    def test_does_not_mutate_input(self):
        # Arrange
        data = {"session_id": "sess-1", "tags": ["a"]}

        # Act
        result = mappers.channel_session_for_write(data)
        result["tags"].append("b")

        # Assert
        # 浅拷贝：嵌套可变对象仍共享引用，但顶层 key 修改不影响原 dict
        assert "session_id" in data
        assert data["tags"] == ["a", "b"]  # 浅拷贝共享嵌套 list


@pytest.mark.unit
class TestPairingForWrite:
    """``pairing_for_write`` 无敏感字段，直接透传 ``dict(data)``。"""

    def test_returns_new_dict_with_same_content(self):
        # Arrange
        data = {"pairing_id": "pair-1", "peer_id": "peer-1", "status": "pending"}

        # Act
        result = mappers.pairing_for_write(data)

        # Assert
        assert result == data
        assert result is not data

    def test_does_not_mutate_input(self):
        # Arrange
        data = {"pairing_id": "pair-1"}

        # Act
        result = mappers.pairing_for_write(data)
        result["new_key"] = "value"

        # Assert
        assert "new_key" not in data


@pytest.mark.unit
class TestAuditLogForWrite:
    """``audit_log_for_write`` 处理 ``target_channel`` / ``target`` 字段回退。"""

    def test_passes_through_when_target_channel_provided(self):
        # Arrange
        data = {
            "operator": "admin-1",
            "target_channel": "feishu",
            "target": "feishu",
        }

        # Act
        result = mappers.audit_log_for_write(data)

        # Assert
        # target_channel 已存在，不消费 target 字段
        assert result["target_channel"] == "feishu"
        assert result["target"] == "feishu"
        assert result is not data

    def test_falls_back_to_target_when_target_channel_missing(self):
        # Arrange
        data = {
            "operator": "admin-1",
            "target": "feishu",
        }

        # Act
        result = mappers.audit_log_for_write(data)

        # Assert
        # target_channel 缺失：将 target 重命名为 target_channel
        assert result["target_channel"] == "feishu"
        assert "target" not in result

    def test_falls_back_to_target_when_target_channel_empty(self):
        # Arrange
        data = {
            "target_channel": "",
            "target": "feishu",
        }

        # Act
        result = mappers.audit_log_for_write(data)

        # Assert
        # 空字符串视为 falsy，触发回退
        assert result["target_channel"] == "feishu"
        assert "target" not in result

    def test_passes_through_when_both_missing(self):
        # Arrange
        data = {"operator": "admin-1", "result": "success"}

        # Act
        result = mappers.audit_log_for_write(data)

        # Assert
        assert "target_channel" not in result
        assert "target" not in result
        assert result == data

    def test_does_not_mutate_input_when_falling_back(self):
        # Arrange
        data = {"target": "feishu"}

        # Act
        result = mappers.audit_log_for_write(data)

        # Assert
        # 原 dict 不被修改
        assert data == {"target": "feishu"}
        assert result["target_channel"] == "feishu"


@pytest.mark.unit
class TestOutboxEntryForWrite:
    """``outbox_entry_for_write`` 无敏感字段，直接透传 ``dict(data)``。"""

    def test_returns_new_dict_with_same_content(self):
        # Arrange
        data = {
            "outbox_id": 1,
            "message_id": "500",
            "status": "pending",
            "latency_ms": 100,
            "funnel_node": "ingest",
        }

        # Act
        result = mappers.outbox_entry_for_write(data)

        # Assert
        assert result == data
        assert result is not data

    def test_does_not_mutate_input(self):
        # Arrange
        data = {"outbox_id": 1}

        # Act
        result = mappers.outbox_entry_for_write(data)
        result["new_key"] = "value"

        # Assert
        assert "new_key" not in data


@pytest.mark.unit
class TestUserIdentityForWrite:
    """``user_identity_for_write`` 无敏感字段，直接透传 ``dict(data)``。"""

    def test_returns_new_dict_with_same_content(self):
        # Arrange
        data = {
            "identity_id": "uid-1",
            "user_id": "300",
            "identity_type": "email",
        }

        # Act
        result = mappers.user_identity_for_write(data)

        # Assert
        assert result == data
        assert result is not data

    def test_does_not_mutate_input(self):
        # Arrange
        data = {"identity_id": "uid-1"}

        # Act
        result = mappers.user_identity_for_write(data)
        result["new_key"] = "value"

        # Assert
        assert "new_key" not in data


@pytest.mark.unit
class TestOrmToRouteBinding:
    """``orm_to_route_binding`` ORM → RouteBindingRule 映射。"""

    def test_maps_all_fields_correctly(self):
        # Arrange
        orm = _make_route_binding_orm()

        # Act
        result = mappers.orm_to_route_binding(orm)

        # Assert
        assert isinstance(result, RouteBindingRule)
        assert result.binding_id == "bind-1"
        assert result.channel_type == ChannelType("feishu")
        assert result.account_id == "acc-1"
        assert result.match_source == "session_key"
        assert result.match_value == "peer-1"
        assert result.agent_binding == "agent-slug"
        assert result.enabled is True
        assert result.description == "test binding"
        assert result.version == 1
        assert result.created_by == "admin-1"
        assert result.updated_by == "admin-1"

    def test_derives_priority_from_match_source_session_key(self):
        # Arrange — session_key 在 _TIER_PRIORITY_MAP 中对应 800
        orm = _make_route_binding_orm()
        orm.match_source = "session_key"

        # Act
        result = mappers.orm_to_route_binding(orm)

        # Assert
        assert result.priority == 800

    def test_derives_priority_from_match_source_peer_id(self):
        # Arrange — peer_id 对应 600，验证不同 tier 派生不同 priority
        orm = _make_route_binding_orm()
        orm.match_source = "peer_id"

        # Act
        result = mappers.orm_to_route_binding(orm)

        # Assert
        assert result.priority == 600

    def test_returns_none_priority_for_unknown_match_source(self):
        # Arrange — 未知 match_source 不在 _TIER_PRIORITY_MAP 中
        orm = _make_route_binding_orm()
        orm.match_source = "unknown_tier"

        # Act
        result = mappers.orm_to_route_binding(orm)

        # Assert
        assert result.priority is None

    def test_coerces_none_enabled_to_false(self):
        # Arrange — enabled 为 None 时 bool(None) = False
        # 注：ORM 列定义为 nullable=False default=True，此处验证 mapper 实际行为
        orm = _make_route_binding_orm()
        orm.enabled = None

        # Act
        result = mappers.orm_to_route_binding(orm)

        # Assert
        assert result.enabled is False

    def test_passes_none_description_through(self):
        # Arrange — description 为 None 时直接透传，dataclass 字段类型为 str | None
        orm = _make_route_binding_orm()
        orm.description = None

        # Act
        result = mappers.orm_to_route_binding(orm)

        # Assert
        assert result.description is None


@pytest.mark.unit
class TestEnumHelper:
    """``_enum`` 安全构造枚举，非法值翻译为 DependencyError。"""

    def test_returns_enum_instance_for_valid_value(self):
        # Arrange — AccountStatus.ACTIVE 对应 "active"

        # Act
        result = mappers._enum("active", AccountStatus, "channel_account")

        # Assert
        assert result == AccountStatus.ACTIVE

    def test_raises_dependency_error_for_invalid_value(self):
        # Arrange — "invalid_status" 不是 AccountStatus 合法成员

        # Act / Assert
        with pytest.raises(DependencyError) as exc_info:
            mappers._enum("invalid_status", AccountStatus, "channel_account")

        err = exc_info.value
        # 资源标识（field）写入 dep 属性
        assert err.dep == "channel_account"
        # 枚举类名与原始非法值出现在 cause 的错误信息中
        cause_msg = err.cause.message
        assert "AccountStatus" in cause_msg
        assert "invalid_status" in cause_msg


@pytest.mark.unit
class TestSerializeForJson:
    """``_serialize_for_json`` 递归将 datetime/date 转为 ISO 字符串。"""

    def test_serializes_datetime_to_isoformat(self):
        # Arrange
        value = datetime(2026, 1, 2, 3, 4, 5)

        # Act
        result = mappers._serialize_for_json(value)

        # Assert
        assert result == "2026-01-02T03:04:05"

    def test_serializes_date_to_isoformat(self):
        # Arrange
        value = date(2026, 1, 2)

        # Act
        result = mappers._serialize_for_json(value)

        # Assert
        assert result == "2026-01-02"

    def test_serializes_dict_recursively(self):
        # Arrange — dict 内嵌 datetime 应递归序列化
        value = {"created_at": datetime(2026, 1, 2, 3, 4, 5), "name": "test"}

        # Act
        result = mappers._serialize_for_json(value)

        # Assert
        assert result == {"created_at": "2026-01-02T03:04:05", "name": "test"}

    def test_serializes_list_recursively(self):
        # Arrange — list 内嵌 datetime 应递归序列化
        value = [datetime(2026, 1, 2, 3, 4, 5), "str"]

        # Act
        result = mappers._serialize_for_json(value)

        # Assert
        assert result == ["2026-01-02T03:04:05", "str"]

    def test_serializes_tuple_recursively(self):
        # Arrange — tuple 内嵌 datetime 应递归序列化
        value = (datetime(2026, 1, 2, 3, 4, 5), "str")

        # Act
        result = mappers._serialize_for_json(value)

        # Assert
        assert result == ("2026-01-02T03:04:05", "str")

    def test_passes_through_plain_types(self):
        # Arrange — str/int/float/bool/None 不命中 datetime/date/容器分支，直接返回
        values = ["str", 1, 1.5, True, None]

        # Act
        results = [mappers._serialize_for_json(v) for v in values]

        # Assert
        assert results == ["str", 1, 1.5, True, None]