from pydantic import BaseModel, EmailStr, field_validator
from typing import List, Optional, Dict, Any
from datetime import datetime

# User Schemas
class UserBase(BaseModel):
    email: EmailStr

class UserCreate(UserBase):
    password: str

class UserLogin(BaseModel):
    email: EmailStr
    password: str

class UserResponse(UserBase):
    id: int
    is_active: bool = True

    class Config:
        from_attributes = True

class ForgotPasswordRequest(BaseModel):
    email: EmailStr

class VerifyOTPRequest(BaseModel):
    email: EmailStr
    otp: str

class ResetPasswordRequest(BaseModel):
    new_password: str

class ChangePasswordRequest(BaseModel):
    new_password: str

# Token Schemas
class Token(BaseModel):
    access_token: str
    token_type: str

class TokenData(BaseModel):
    email: Optional[str] = None

# Source Schemas
class SourceFileResponse(BaseModel):
    id: int
    filename: str
    s3_key: str
    public_url: str
    private_url: Optional[str] = None
    size: int
    created_at: datetime
    rag_id: Optional[int] = None
    azure_doc_id: Optional[str] = None

    class Config:
        from_attributes = True

# Podcast Schemas
class PodcastGenerateRequest(BaseModel):
    user_prompt: str
    model: str = "gpt-4o"
    duration_minutes: int = 10
    podcast_format: str = "deep dive"
    file_key: Optional[str] = None
    tts_model: str = "gemini-2.5-flash-preview-tts"
    spk1_voice: str = "Zephyr"
    spk2_voice: str = "Charon"
    bgm_choice: str = "No BGM"
    temperature: float = 1.0

class PodcastResponse(BaseModel):
    id: int
    title: Optional[str]
    s3_key: Optional[str]
    s3_url: Optional[str]
    script: Optional[str]
    status: Optional[str] = "completed"
    error_message: Optional[str]
    parent_file_id: Optional[int] = None
    parent_file_key: Optional[str] = None
    created_at: datetime

    class Config:
        from_attributes = True


# Flashcard Schemas
class FlashcardItem(BaseModel):
    question: str
    answer: str

class FlashcardGenerateRequest(BaseModel):
    file_key: Optional[str] = None
    text_input: Optional[str] = None
    difficulty: str = "medium"
    quantity: str = "standard"
    topic: Optional[str] = None
    language: str = "English"

class FlashcardResponse(BaseModel):
    id: int
    question: str
    answer: str

    class Config:
        from_attributes = True

class FlashcardSetResponse(BaseModel):
    id: int
    title: Optional[str]
    difficulty: str
    status: Optional[str] = "completed"
    error_message: Optional[str] = None
    created_at: datetime
    parent_file_id: Optional[int] = None
    parent_file_key: Optional[str] = None
    flashcards: List[FlashcardResponse] = []

    class Config:
        from_attributes = True

# Mind Map Schemas
class MindMapGenerateRequest(BaseModel):
    file_key: Optional[str] = None
    text_input: Optional[str] = None
    title: Optional[str] = None

class MindMapResponse(BaseModel):
    id: Optional[int] = None
    title: str
    mermaid_code: Optional[str] = None
    status: Optional[str] = "completed"
    error_message: Optional[str] = None
    parent_file_id: Optional[int] = None
    parent_file_key: Optional[str] = None
    created_at: Optional[datetime] = None
    message: Optional[str] = None

    class Config:
        from_attributes = True

# Quiz Schemas
class QuizGenerateRequest(BaseModel):
    file_key: Optional[str] = None
    text_input: Optional[str] = None
    difficulty: str = "medium"
    topic: Optional[str] = None
    language: str = "English"
    count: str = "STANDARD" # FEWER, STANDARD, MORE

class QuizChoice(BaseModel) :
    value: str
    label: str

class QuizQuestionResponse(BaseModel):
    id: int
    question: str
    hint: Optional[str]
    choices: List[QuizChoice]
    answer: str
    explanation: Optional[str]

    @field_validator('choices', mode='before')
    @classmethod
    def validate_choices(cls, v):
        if isinstance(v, dict):
            # Convert {"1": "label1", "2": "label2"} to [{"value": "1", "label": "label1"}, ...]
            return [{"value": key, "label": value} for key, value in v.items()]
        return v

    class Config:
        from_attributes = True

class QuizSetResponse(BaseModel):
    id: int
    title: Optional[str]
    difficulty: str
    status: Optional[str] = "completed"
    error_message: Optional[str] = None
    created_at: datetime
    parent_file_id: Optional[int] = None
    parent_file_key: Optional[str] = None
    questions: List[QuizQuestionResponse] = []

    class Config:
        from_attributes = True

# Report Schemas
class ReportFormatSuggestion(BaseModel):
    name: str
    description: str
    prompt: str

class ReportFormatSuggestionResponse(BaseModel):
    suggestions: List[ReportFormatSuggestion]

class ReportGenerateRequest(BaseModel):
    file_key: Optional[str] = None
    text_input: Optional[str] = None
    format_key: str # briefing_doc, study_guide, blog_post, custom, or suggested_X
    custom_prompt: Optional[str] = None
    language: str = "Japanese"

class ReportResponse(BaseModel):
    id: int
    title: str
    content: Optional[str] = None
    format_key: str
    status: Optional[str] = "completed"
    error_message: Optional[str] = None
    parent_file_id: Optional[int] = None
    parent_file_key: Optional[str] = None
    created_at: datetime

    class Config:
        from_attributes = True

# Video Summary Schemas
class VideoSummaryGenerateRequest(BaseModel):
    file_key: str
    language: str = "Japanese"
    voice_name: str = "Kore" # Kore, Fenrir, etc.
    use_slides_transformation: bool = True
    custom_prompt: Optional[str] = ""

class VideoSummaryResponse(BaseModel):
    id: int
    title: str
    s3_key: Optional[str] = None
    public_url: Optional[str] = None
    private_url: Optional[str] = None
    status: Optional[str] = "completed"
    error_message: Optional[str] = None
    parent_file_id: Optional[int] = None
    parent_file_key: Optional[str] = None
    created_at: datetime

    class Config:
        from_attributes = True

# RAG Schemas
class RAGDocumentUploadRequest(BaseModel):
    source_id: Optional[int] = None  # Link to existing source file

class RAGSearchRequest(BaseModel):
    query: str
    top_k: int = 5

class RAGDocumentResponse(BaseModel):
    id: int
    filename: str
    azure_doc_id: str
    blob_url: Optional[str]
    content_preview: Optional[str]
    chunk_count: int
    created_at: datetime

    class Config:
        from_attributes = True

class RAGSearchResult(BaseModel):
    content: str
    score: float
    source: str
    metadata: Dict[str, Any] = {}

class RAGSearchResponse(BaseModel):
    results: List[RAGSearchResult]
    answer: Optional[str] = None 
# RAG Query Request (Simplified)
class RAGQueryRequest(BaseModel):
    file_key: str  # S3 key of the source file
    query: str
    top_k: int = 3  # Number of relevant chunks to use

# Chat Schemas
class ChatMessageCreate(BaseModel):
    query: str  # The user's question or message
    rag_doc_id: Optional[int] = None # Optional: Link to a specific document for context

class ChatMessageResponse(BaseModel):
    id: int
    role: str
    content: str # keeping 'content' here as it represents the stored/returned textual data
    rag_doc_id: Optional[int]
    created_at: datetime

    class Config:
        from_attributes = True

# Canvas Schemas
class CanvasCreateRequest(BaseModel):
    file_key: Optional[str] = None
    text_input: Optional[str] = None
    title: Optional[str] = None

class CanvasEditRequest(BaseModel):
    text: str # The manually edited markdown text


class CanvasResponse(BaseModel):
    id: int
    title: str
    text: Optional[str]
    status: str
    error_message: Optional[str] = None
    parent_file_id: Optional[int] = None
    parent_file_key: Optional[str] = None
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True