"""
Pydantic Schemas für Content Service API
"""
from pydantic import BaseModel, Field, validator
from typing import Optional, List
from datetime import datetime
from models import ContentType, CCLicense, ContentCategory, ContentStatus

# ============= REQUEST SCHEMAS =============

class ContentCreate(BaseModel):
    """Schema für Content Creation"""
    title: str = Field(..., min_length=3, max_length=500)
    description: Optional[str] = Field(None, max_length=5000)
    content_type: ContentType
    category: ContentCategory
    license: CCLicense = CCLicense.CC_BY_SA

    age_min: int = Field(6, ge=3, le=18)
    age_max: int = Field(18, ge=3, le=18)

    embed_url: Optional[str] = None
    tags: List[str] = []

    @validator('age_max')
    def age_max_must_be_greater(cls, v, values):
        if 'age_min' in values and v < values['age_min']:
            raise ValueError('age_max must be >= age_min')
        return v

class ContentUpdate(BaseModel):
    """Schema für Content Update"""
    title: Optional[str] = Field(None, min_length=3, max_length=500)
    description: Optional[str] = Field(None, max_length=5000)
    category: Optional[ContentCategory] = None
    license: Optional[CCLicense] = None
    age_min: Optional[int] = Field(None, ge=3, le=18)
    age_max: Optional[int] = Field(None, ge=3, le=18)
    embed_url: Optional[str] = None
    tags: Optional[List[str]] = None
    status: Optional[ContentStatus] = None

class RatingCreate(BaseModel):
    """Schema für Rating Creation"""
    stars: int = Field(..., ge=1, le=5)
    comment: Optional[str] = Field(None, max_length=2000)

# ============= RESPONSE SCHEMAS =============

class TagResponse(BaseModel):
    """Tag Response"""
    id: str
    name: str
    category: Optional[str]

    class Config:
        from_attributes = True

class RatingResponse(BaseModel):
    """Rating Response"""
    id: str
    user_id: str
    user_name: Optional[str]
    stars: int
    comment: Optional[str]
    created_at: datetime

    class Config:
        from_attributes = True

class ContentResponse(BaseModel):
    """Content Response (Full)"""
    id: str
    creator_id: str
    creator_name: str
    creator_email: Optional[str]

    title: str
    description: Optional[str]
    content_type: ContentType
    category: ContentCategory
    license: CCLicense

    age_min: int
    age_max: int

    files: List[str]
    thumbnail_url: Optional[str]
    embed_url: Optional[str]
    h5p_content_id: Optional[str]

    matrix_room_id: Optional[str]
    matrix_event_id: Optional[str]

    status: ContentStatus

    downloads: int
    views: int
    avg_rating: float
    rating_count: int
    impact_score: float

    created_at: datetime
    updated_at: datetime
    published_at: Optional[datetime]

    tags: List[TagResponse] = []

    class Config:
        from_attributes = True

class ContentListItem(BaseModel):
    """Content Response (List View - simplified)"""
    id: str
    creator_name: str
    title: str
    description: Optional[str]
    content_type: ContentType
    category: ContentCategory
    license: CCLicense
    thumbnail_url: Optional[str]
    avg_rating: float
    rating_count: int
    downloads: int
    created_at: datetime
    tags: List[str] = []

    class Config:
        from_attributes = True

class ContentWithRatings(ContentResponse):
    """Content with ratings included"""
    ratings: List[RatingResponse] = []

    class Config:
        from_attributes = True

# ============= FILTER SCHEMAS =============

class ContentFilter(BaseModel):
    """Search/Filter Parameters"""
    search: Optional[str] = None
    category: Optional[ContentCategory] = None
    content_type: Optional[ContentType] = None
    license: Optional[CCLicense] = None
    age_min: Optional[int] = None
    age_max: Optional[int] = None
    tags: Optional[List[str]] = None
    min_rating: Optional[float] = None
    status: Optional[ContentStatus] = ContentStatus.PUBLISHED
    creator_id: Optional[str] = None

    # Pagination
    skip: int = Field(0, ge=0)
    limit: int = Field(20, ge=1, le=100)

    # Sorting
    sort_by: str = Field("created_at", pattern="^(created_at|avg_rating|downloads|title)$")
    sort_desc: bool = True

# ============= ANALYTICS SCHEMAS =============

class ContentStats(BaseModel):
    """Content Statistics"""
    total_contents: int
    total_downloads: int
    total_views: int
    avg_rating: float
    by_category: dict
    by_type: dict
    by_license: dict

class CreatorStats(BaseModel):
    """Creator Statistics"""
    creator_id: str
    creator_name: str
    total_contents: int
    total_downloads: int
    total_views: int
    avg_rating: float
    impact_score: float
    content_breakdown: dict

# ============= UPLOAD SCHEMAS =============

class FileUploadResponse(BaseModel):
    """File Upload Response"""
    file_url: str
    file_name: str
    file_size: int
    content_type: str