from datetime import datetime
from typing import Optional, List, Generic, TypeVar
from pydantic import BaseModel
from uuid import UUID

T = TypeVar("T")


# Pagination schemas
class PaginationMeta(BaseModel):
    page: int
    limit: int
    total: int
    total_pages: int


class PaginatedResponse(BaseModel, Generic[T]):
    items: List[T]
    pagination: PaginationMeta


# Project schemas
class ProjectCreate(BaseModel):
    name: str
    description: Optional[str] = None
    is_public: bool = True


class ProjectResponse(BaseModel):
    id: UUID
    name: str
    description: Optional[str]
    is_public: bool
    created_at: datetime
    updated_at: datetime
    created_by: str

    class Config:
        from_attributes = True


# Package schemas
class PackageCreate(BaseModel):
    name: str
    description: Optional[str] = None


class PackageResponse(BaseModel):
    id: UUID
    project_id: UUID
    name: str
    description: Optional[str]
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True


# Artifact schemas
class ArtifactResponse(BaseModel):
    id: str
    size: int
    content_type: Optional[str]
    original_name: Optional[str]
    created_at: datetime
    created_by: str
    ref_count: int

    class Config:
        from_attributes = True


# Tag schemas
class TagCreate(BaseModel):
    name: str
    artifact_id: str


class TagResponse(BaseModel):
    id: UUID
    package_id: UUID
    name: str
    artifact_id: str
    created_at: datetime
    created_by: str

    class Config:
        from_attributes = True


# Upload response
class UploadResponse(BaseModel):
    artifact_id: str
    size: int
    project: str
    package: str
    tag: Optional[str]


# Consumer schemas
class ConsumerResponse(BaseModel):
    id: UUID
    package_id: UUID
    project_url: str
    last_access: datetime
    created_at: datetime

    class Config:
        from_attributes = True


# Health check
class HealthResponse(BaseModel):
    status: str
    version: str = "1.0.0"