"""
依赖注入容器
管理所有 Use Cases 和 Repositories 的生命周期
"""
from packages.adapters.in_memory.user_repository import InMemoryUserRepository
from packages.adapters.in_memory.workspace_repository import InMemoryWorkspaceRepository
from packages.adapters.in_memory.workspace_member_repository import InMemoryWorkspaceMemberRepository
from packages.adapters.in_memory.workspace_invitation_repository import InMemoryWorkspaceInvitationRepository

from packages.application.auth import (
    RegisterUserUseCase,
    LoginUseCase,
    LogoutUseCase,
    VerifyEmailUseCase,
    RequestPasswordResetUseCase,
    ResetPasswordUseCase,
)

from packages.application.workspace import (
    CreateWorkspaceUseCase,
    InviteMemberUseCase,
    AcceptInvitationUseCase,
    DeclineInvitationUseCase,
    RemoveMemberUseCase,
    LeaveWorkspaceUseCase,
    UpdateMemberRoleUseCase,
    ListWorkspacesUseCase,
    GetWorkspaceDetailUseCase,
    ListMembersUseCase,
    UpgradeSubscriptionUseCase,
    CancelSubscriptionUseCase,
)

from packages.domain.permissions import PermissionChecker
from packages.domain.quota import QuotaChecker


class DependencyContainer:
    """依赖注入容器"""
    
    def __init__(self):
        # Repositories (单例)
        self._user_repository = None
        self._workspace_repository = None
        self._workspace_member_repository = None
        self._workspace_invitation_repository = None
        self._project_repository = None
        
        # Services
        self._permission_checker = None
        self._quota_checker = None
    
    # ==================== Repositories ====================
    
    @property
    def user_repository(self):
        if self._user_repository is None:
            from apps.api.app.config import settings
            if settings.USE_IN_MEMORY_DB:
                from packages.adapters.in_memory.user_repository import InMemoryUserRepository
                self._user_repository = InMemoryUserRepository()
            else:
                from packages.adapters.postgres.user_repository import PostgresUserRepository
                self._user_repository = PostgresUserRepository(settings.DATABASE_URL)
        return self._user_repository
    
    @property
    def workspace_repository(self):
        if self._workspace_repository is None:
            from apps.api.app.config import settings
            if settings.USE_IN_MEMORY_DB:
                from packages.adapters.in_memory.workspace_repository import InMemoryWorkspaceRepository
                self._workspace_repository = InMemoryWorkspaceRepository()
            else:
                from packages.adapters.postgres.workspace_repository import PostgresWorkspaceRepository
                self._workspace_repository = PostgresWorkspaceRepository(settings.DATABASE_URL)
        return self._workspace_repository
    
    @property
    def workspace_member_repository(self):
        if self._workspace_member_repository is None:
            from apps.api.app.config import settings
            if settings.USE_IN_MEMORY_DB:
                from packages.adapters.in_memory.workspace_member_repository import InMemoryWorkspaceMemberRepository
                self._workspace_member_repository = InMemoryWorkspaceMemberRepository()
            else:
                from packages.adapters.postgres.workspace_member_repository import PostgresWorkspaceMemberRepository
                self._workspace_member_repository = PostgresWorkspaceMemberRepository(settings.DATABASE_URL)
        return self._workspace_member_repository
    
    @property
    def workspace_invitation_repository(self):
        if self._workspace_invitation_repository is None:
            self._workspace_invitation_repository = InMemoryWorkspaceInvitationRepository()
        return self._workspace_invitation_repository
    
    @property
    def project_repository(self):
        # TODO: 实现 InMemoryProjectRepository
        if self._project_repository is None:
            from unittest.mock import Mock
            self._project_repository = Mock()
            self._project_repository.count_by_workspace = Mock(return_value=0)
        return self._project_repository
    
    # ==================== Services ====================
    
    @property
    def permission_checker(self):
        if self._permission_checker is None:
            self._permission_checker = PermissionChecker(
                workspace_member_repository=self.workspace_member_repository,
            )
        return self._permission_checker
    
    @property
    def quota_checker(self):
        if self._quota_checker is None:
            self._quota_checker = QuotaChecker(
                workspace_repository=self.workspace_repository,
                project_repository=self.project_repository,
            )
        return self._quota_checker
    
    # ==================== Auth Use Cases ====================
    
    def get_register_user_use_case(self) -> RegisterUserUseCase:
        return RegisterUserUseCase(
            user_repository=self.user_repository,
            base_url="http://localhost:3000",  # TODO: 从配置读取
        )
    
    def get_login_use_case(self) -> LoginUseCase:
        return LoginUseCase(
            user_repository=self.user_repository,
        )
    
    def get_logout_use_case(self) -> LogoutUseCase:
        return LogoutUseCase()
    
    def get_verify_email_use_case(self) -> VerifyEmailUseCase:
        return VerifyEmailUseCase(
            user_repository=self.user_repository,
        )
    
    def get_request_password_reset_use_case(self) -> RequestPasswordResetUseCase:
        return RequestPasswordResetUseCase(
            user_repository=self.user_repository,
            base_url="http://localhost:3000",
        )
    
    def get_reset_password_use_case(self) -> ResetPasswordUseCase:
        return ResetPasswordUseCase(
            user_repository=self.user_repository,
        )
    
    # ==================== Workspace Use Cases ====================
    
    def get_create_workspace_use_case(self) -> CreateWorkspaceUseCase:
        return CreateWorkspaceUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
            user_repository=self.user_repository,
        )
    
    def get_invite_member_use_case(self) -> InviteMemberUseCase:
        return InviteMemberUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
            workspace_invitation_repository=self.workspace_invitation_repository,
            user_repository=self.user_repository,
            base_url="http://localhost:3000",
        )
    
    def get_accept_invitation_use_case(self) -> AcceptInvitationUseCase:
        return AcceptInvitationUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
            workspace_invitation_repository=self.workspace_invitation_repository,
            user_repository=self.user_repository,
        )
    
    def get_decline_invitation_use_case(self) -> DeclineInvitationUseCase:
        return DeclineInvitationUseCase(
            workspace_invitation_repository=self.workspace_invitation_repository,
        )
    
    def get_remove_member_use_case(self) -> RemoveMemberUseCase:
        return RemoveMemberUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
        )
    
    def get_leave_workspace_use_case(self) -> LeaveWorkspaceUseCase:
        return LeaveWorkspaceUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
        )
    
    def get_update_member_role_use_case(self) -> UpdateMemberRoleUseCase:
        return UpdateMemberRoleUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
        )
    
    def get_list_workspaces_use_case(self) -> ListWorkspacesUseCase:
        return ListWorkspacesUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
        )
    
    def get_get_workspace_detail_use_case(self) -> GetWorkspaceDetailUseCase:
        return GetWorkspaceDetailUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
        )
    
    def get_list_members_use_case(self) -> ListMembersUseCase:
        return ListMembersUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
            user_repository=self.user_repository,
        )
    
    def get_upgrade_subscription_use_case(self) -> UpgradeSubscriptionUseCase:
        return UpgradeSubscriptionUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
        )
    
    def get_cancel_subscription_use_case(self) -> CancelSubscriptionUseCase:
        return CancelSubscriptionUseCase(
            workspace_repository=self.workspace_repository,
            workspace_member_repository=self.workspace_member_repository,
        )


# 全局容器实例
_container = None


def get_container() -> DependencyContainer:
    """获取全局依赖容器"""
    global _container
    if _container is None:
        _container = DependencyContainer()
    return _container