"""
Configuration schema with Pydantic models

Single source of truth for all configuration defaults and validation.
"""
from typing import Optional
from pydantic import BaseModel, Field


class LLMConfig(BaseModel):
    """LLM configuration"""
    api_key: str = Field(default="", description="LLM API Key")
    base_url: str = Field(default="", description="LLM API Base URL")
    model: str = Field(default="", description="LLM Model Name")


class TTSLocalConfig(BaseModel):
    """Local TTS configuration (Edge TTS)"""
    voice: str = Field(default="zh-CN-YunjianNeural", description="Edge TTS voice ID")
    speed: float = Field(default=1.2, ge=0.5, le=2.0, description="Speech speed multiplier (0.5-2.0)")


class TTSComfyUIConfig(BaseModel):
    """ComfyUI TTS configuration"""
    default_workflow: Optional[str] = Field(default=None, description="Default TTS workflow (optional)")


class TTSSubConfig(BaseModel):
    """TTS-specific configuration (under comfyui.tts)"""
    inference_mode: str = Field(default="local", description="TTS inference mode: 'local' or 'comfyui'")
    local: TTSLocalConfig = Field(default_factory=TTSLocalConfig, description="Local TTS (Edge TTS) configuration")
    comfyui: TTSComfyUIConfig = Field(default_factory=TTSComfyUIConfig, description="ComfyUI TTS configuration")
    
    # Backward compatibility: keep default_workflow at top level
    @property
    def default_workflow(self) -> Optional[str]:
        """Get default workflow (for backward compatibility)"""
        return self.comfyui.default_workflow


class ImageSubConfig(BaseModel):
    """Image-specific configuration (under comfyui.image)"""
    default_workflow: Optional[str] = Field(default=None, description="Default image workflow (optional)")
    prompt_prefix: str = Field(
        default="Minimalist black-and-white matchstick figure style illustration, clean lines, simple sketch style",
        description="Prompt prefix for all image generation"
    )


class ComfyUIConfig(BaseModel):
    """ComfyUI configuration (includes global settings and service-specific configs)"""
    comfyui_url: str = Field(default="http://127.0.0.1:8188", description="ComfyUI Server URL")
    runninghub_api_key: str = Field(default="", description="RunningHub API Key (optional)")
    tts: TTSSubConfig = Field(default_factory=TTSSubConfig, description="TTS-specific configuration")
    image: ImageSubConfig = Field(default_factory=ImageSubConfig, description="Image-specific configuration")


class PixelleVideoConfig(BaseModel):
    """Pixelle-Video main configuration"""
    project_name: str = Field(default="Pixelle-Video", description="Project name")
    llm: LLMConfig = Field(default_factory=LLMConfig)
    comfyui: ComfyUIConfig = Field(default_factory=ComfyUIConfig)
    
    def is_llm_configured(self) -> bool:
        """Check if LLM is properly configured"""
        return bool(
            self.llm.api_key and self.llm.api_key.strip() and
            self.llm.base_url and self.llm.base_url.strip() and
            self.llm.model and self.llm.model.strip()
        )
    
    def validate_required(self) -> bool:
        """Validate required configuration"""
        return self.is_llm_configured()
    
    def to_dict(self) -> dict:
        """Convert to dictionary (for backward compatibility)"""
        return self.model_dump()