"""绑定联系方式 UseCase 单元测试."""

from __future__ import annotations

from unittest.mock import MagicMock

import pytest

from packages.application.auth.bind_contact_use_case import (
    BindContactRequest,
    BindContactUseCase,
    SendVerificationCodeRequest,
    SendVerificationCodeUseCase,
)
from packages.domain.entities import User


@pytest.fixture
def mock_user_repo():
    return MagicMock()


@pytest.fixture
def mock_verification_service():
    svc = MagicMock()
    svc.verify.return_value = (True, None)
    return svc


@pytest.fixture
def sample_user():
    user = User(
        id="user_001",
        email="",
        display_name="测试用户",
        phone_verified=False,
        email_verified=False,
    )
    user.phone = None
    return user


class TestBindContactRequest:
    """BindContactRequest 测试"""

    def test_phone_strips_plus86(self):
        """手机号 +86 前缀会被去掉"""
        req = BindContactRequest(user_id="u1", phone="+8613800000001", phone_code="1234")
        assert req.phone == "13800000001"

    def test_email_lowercased(self):
        """邮箱会被转小写"""
        req = BindContactRequest(user_id="u1", email="Test@Example.COM", email_code="1234")
        assert req.email == "test@example.com"

    def test_code_stripped(self):
        """验证码会被 strip"""
        req = BindContactRequest(user_id="u1", phone="13800000001", phone_code="  1234  ")
        assert req.phone_code == "1234"

    def test_empty_fields(self):
        """空字段处理"""
        req = BindContactRequest(user_id="u1")
        assert req.phone == ""
        assert req.email == ""
        assert req.phone_code == ""
        assert req.email_code == ""


class TestBindContactUseCase:
    """BindContactUseCase 测试"""

    def test_bind_phone_success(self, mock_user_repo, mock_verification_service, sample_user):
        """绑定手机号成功"""
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_phone.return_value = None
        mock_user_repo.save.return_value = sample_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            phone="13800000001",
            phone_code="123456",
        )
        response, error = use_case.execute(request)

        assert error is None
        assert response is not None
        assert response.user.phone == "13800000001"
        assert response.user.phone_verified is True
        mock_user_repo.save.assert_called_once()

    def test_bind_email_success(self, mock_user_repo, mock_verification_service, sample_user):
        """绑定邮箱成功"""
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_email.return_value = None
        mock_user_repo.save.return_value = sample_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            email="test@example.com",
            email_code="123456",
        )
        response, error = use_case.execute(request)

        assert error is None
        assert response is not None
        assert response.user.email == "test@example.com"
        assert response.user.email_verified is True

    def test_bind_phone_and_email(self, mock_user_repo, mock_verification_service, sample_user):
        """同时绑定手机和邮箱"""
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_phone.return_value = None
        mock_user_repo.find_by_email.return_value = None
        mock_user_repo.save.return_value = sample_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            phone="13800000001",
            phone_code="123456",
            email="test@example.com",
            email_code="123456",
        )
        response, error = use_case.execute(request)

        assert error is None
        assert response.user.phone == "13800000001"
        assert response.user.phone_verified is True
        assert response.user.email == "test@example.com"
        assert response.user.email_verified is True
        # 两个都绑定完成，binding_completed_at 应该被设置
        assert response.user.binding_completed_at is not None

    def test_no_contact_info_returns_error(self, mock_user_repo, mock_verification_service):
        """既没填手机也没填邮箱返回错误"""
        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(user_id="user_001")

        response, error = use_case.execute(request)

        assert response is None
        assert "至少填写" in error
        mock_user_repo.find_by_id.assert_not_called()

    def test_user_not_found(self, mock_user_repo, mock_verification_service):
        """用户不存在返回错误"""
        mock_user_repo.find_by_id.return_value = None

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="nonexistent",
            phone="13800000001",
            phone_code="123456",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert "用户不存在" in error

    def test_phone_already_bound_by_other(self, mock_user_repo, mock_verification_service, sample_user):
        """手机号已被其他账号绑定"""
        other_user = MagicMock()
        other_user.id = "user_other"
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_phone.return_value = other_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            phone="13800000001",
            phone_code="123456",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert "已被其他账号绑定" in error
        mock_user_repo.save.assert_not_called()

    def test_phone_bound_by_self_ok(self, mock_user_repo, mock_verification_service, sample_user):
        """手机号已被自己绑定，允许"""
        sample_user.phone = "13800000001"
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_phone.return_value = sample_user
        mock_user_repo.save.return_value = sample_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            phone="13800000001",
            phone_code="123456",
        )

        response, error = use_case.execute(request)
        assert error is None
        assert response is not None

    def test_wrong_phone_code(self, mock_user_repo, mock_verification_service, sample_user):
        """手机验证码错误"""
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_phone.return_value = None
        mock_verification_service.verify.return_value = (False, "验证码过期")

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            phone="13800000001",
            phone_code="000000",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert "手机验证码错误" in error
        mock_user_repo.save.assert_not_called()

    def test_missing_phone_code(self, mock_user_repo, mock_verification_service, sample_user):
        """缺少手机验证码"""
        mock_user_repo.find_by_id.return_value = sample_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            phone="13800000001",
            phone_code="",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert "请输入手机验证码" in error

    def test_invalid_phone_format(self, mock_user_repo, mock_verification_service, sample_user):
        """手机号格式不正确"""
        mock_user_repo.find_by_id.return_value = sample_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            phone="123",  # 太短
            phone_code="123456",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert error is not None

    def test_email_already_bound_by_other(self, mock_user_repo, mock_verification_service, sample_user):
        """邮箱已被其他账号绑定"""
        other_user = MagicMock()
        other_user.id = "user_other"
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_email.return_value = other_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            email="test@example.com",
            email_code="123456",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert "已被其他账号绑定" in error

    def test_missing_email_code(self, mock_user_repo, mock_verification_service, sample_user):
        """缺少邮箱验证码"""
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_email.return_value = None

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            email="test@example.com",
            email_code="",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert "请输入邮箱验证码" in error

    def test_invalid_email_format(self, mock_user_repo, mock_verification_service, sample_user):
        """邮箱格式不正确"""
        mock_user_repo.find_by_id.return_value = sample_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            email="not_an_email",
            email_code="123456",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert error is not None

    def test_response_to_dict(self, mock_user_repo, mock_verification_service, sample_user):
        """BindContactResponse.to_dict 返回正确格式"""
        mock_user_repo.find_by_id.return_value = sample_user
        mock_user_repo.find_by_phone.return_value = None
        mock_user_repo.find_by_email.return_value = None
        mock_user_repo.save.return_value = sample_user

        use_case = BindContactUseCase(mock_user_repo, mock_verification_service)
        request = BindContactRequest(
            user_id="user_001",
            phone="13800000001",
            phone_code="123456",
            email="test@example.com",
            email_code="123456",
        )
        response, _ = use_case.execute(request)
        data = response.to_dict()

        assert "user" in data
        assert data["user"]["id"] == "user_001"
        assert "email" in data["user"]
        assert "phone" in data["user"]
        assert "phone_verified" in data["user"]
        assert "display_name" in data["user"]
        assert "binding_complete" in data["user"]


class TestSendVerificationCodeRequest:
    """SendVerificationCodeRequest 测试"""

    def test_value_stripped(self):
        """value 会被 strip"""
        req = SendVerificationCodeRequest(target="phone", value="  13800000001  ", purpose="bind")
        assert req.value == "13800000001"


class TestSendVerificationCodeUseCase:
    """SendVerificationCodeUseCase 测试"""

    def test_send_phone_code_success(self, mock_verification_service):
        """发送手机验证码成功"""
        from datetime import datetime, timedelta, timezone

        code_obj = MagicMock()
        code_obj.code = "123456"
        code_obj.created_at = datetime.now(timezone.utc)
        code_obj.expires_at = datetime.now(timezone.utc) + timedelta(minutes=5)
        mock_verification_service.generate.return_value = (code_obj, None)

        mock_sms = MagicMock()
        use_case = SendVerificationCodeUseCase(
            mock_verification_service,
            sms_service=mock_sms,
        )
        request = SendVerificationCodeRequest(
            target="phone",
            value="13800000001",
            purpose="bind",
        )
        response, error = use_case.execute(request)

        assert error is None
        assert response is not None
        assert response.expires_in > 0
        assert response.resend_after == 60
        mock_sms.send_verification_code.assert_called_once()

    def test_send_email_code_success(self, mock_verification_service):
        """发送邮箱验证码成功"""
        from datetime import datetime, timedelta, timezone

        code_obj = MagicMock()
        code_obj.code = "654321"
        code_obj.created_at = datetime.now(timezone.utc)
        code_obj.expires_at = datetime.now(timezone.utc) + timedelta(minutes=5)
        mock_verification_service.generate.return_value = (code_obj, None)

        mock_email = MagicMock()
        use_case = SendVerificationCodeUseCase(
            mock_verification_service,
            email_service=mock_email,
        )
        request = SendVerificationCodeRequest(
            target="email",
            value="test@example.com",
            purpose="bind",
        )
        response, error = use_case.execute(request)

        assert error is None
        assert response is not None
        mock_email.send_email.assert_called_once()

    def test_invalid_target_returns_error(self, mock_verification_service):
        """不支持的目标类型返回错误"""
        use_case = SendVerificationCodeUseCase(mock_verification_service)
        request = SendVerificationCodeRequest(
            target="wechat",
            value="some_value",
            purpose="bind",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert "不支持的目标类型" in error

    def test_invalid_phone_format(self, mock_verification_service):
        """手机号格式错误返回错误"""
        use_case = SendVerificationCodeUseCase(mock_verification_service)
        request = SendVerificationCodeRequest(
            target="phone",
            value="123",
            purpose="bind",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert error is not None
        mock_verification_service.generate.assert_not_called()

    def test_invalid_email_format(self, mock_verification_service):
        """邮箱格式错误返回错误"""
        use_case = SendVerificationCodeUseCase(mock_verification_service)
        request = SendVerificationCodeRequest(
            target="email",
            value="not_email",
            purpose="bind",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert error is not None
        mock_verification_service.generate.assert_not_called()

    def test_generate_failure_returns_error(self, mock_verification_service):
        """生成验证码失败返回错误"""
        mock_verification_service.generate.return_value = (None, "发送太频繁")

        use_case = SendVerificationCodeUseCase(mock_verification_service)
        request = SendVerificationCodeRequest(
            target="phone",
            value="13800000001",
            purpose="bind",
        )

        response, error = use_case.execute(request)

        assert response is None
        assert "发送太频繁" in error

    def test_response_to_dict(self, mock_verification_service):
        """SendVerificationCodeResponse.to_dict 格式正确"""
        from datetime import datetime, timedelta, timezone

        code_obj = MagicMock()
        code_obj.code = "123456"
        code_obj.created_at = datetime.now(timezone.utc)
        code_obj.expires_at = datetime.now(timezone.utc) + timedelta(seconds=300)
        mock_verification_service.generate.return_value = (code_obj, None)

        use_case = SendVerificationCodeUseCase(mock_verification_service)
        request = SendVerificationCodeRequest(
            target="phone",
            value="13800000001",
            purpose="bind",
        )
        response, _ = use_case.execute(request)
        data = response.to_dict()

        assert "expires_in" in data
        assert "resend_after" in data