backend/app/api/config.py

"""
NullAI システム設定API

モデル、ドメイン、DBなどの設定をUIから動的に変更するためのAPI。
"""
from fastapi import APIRouter, HTTPException, Depends, File, UploadFile
from pydantic import BaseModel
from typing import List, Dict, Any, Optional
import os # For file operations
import logging

from backend.app.config import app_config_manager, app_model_router, ModelConfig as PydanticModelConfig

router = APIRouter()
logger = logging.getLogger(__name__)

# モデル保存ディレクトリ (設定可能にするべきだが、一旦ハードコード)
GGUF_MODELS_DIR = os.path.join(app_config_manager.base_dir, "models", "gguf")
os.makedirs(GGUF_MODELS_DIR, exist_ok=True) # ディレクトリが存在しない場合は作成


# --- APIエンドポイント ---

@router.get("/models", response_model=List[PydanticModelConfig])
async def get_models_config():
    """
    現在利用可能なモデルの設定一覧を取得する。
    """
    models = list(app_config_manager.models.values())
    return models

class DomainConfigResponse(BaseModel): # Renamed to avoid conflict
    domain_id: str
    name: str

# Pydantic models for the new engine management endpoints
class EngineStatusResponse(PydanticModelConfig):
    status: str # 'master' | 'apprentice' | 'available' | 'retired'
    unique_id: Optional[str] = None # For apprentice engines

class EngineSwapRequest(BaseModel):
    apprentice_model_id: str

class EnginePromoteRequest(BaseModel):
    apprentice_model_id: str

class NewApprenticeResponse(BaseModel):
    new_apprentice_id: str
    message: str

@router.get("/domains", response_model=List[DomainConfigResponse])
async def get_domains_config():
    """
    現在利用可能なドメイン（知識DB）の設定一覧を取得する。
    """
    domains = list(app_config_manager.domains.values())
    return [DomainConfigResponse(domain_id=d.get("domain_id"), name=d.get("name")) for d in domains]

@router.post("/models", response_model=PydanticModelConfig)
async def register_new_model(model_data: Dict[str, Any]):
    """
    新しいモデルを登録する。
    """
    new_model = app_config_manager.add_model(model_data)
    if not new_model:
        raise HTTPException(status_code=400, detail="Failed to add new model. Check data format.")
    return new_model

@router.get("/engines", response_model=List[EngineStatusResponse])
async def get_all_engines():
    """
    システムに登録されている全てのエンジン（モデル）とそのステータスを取得する。
    """
    all_models = []
    current_master = app_model_router.get_master_model()
    current_apprentice = app_model_router.get_apprentice_model()
    
    # Assuming app_model_router can provide info about all apprentices (even inactive ones)
    # This might need a new method in app_model_router if not available
    all_managed_engines = app_model_router.get_all_managed_engines() # This method needs to be implemented in ModelRouter
    
    for model_id, model_config in app_config_manager.models.items():
        status = 'available'
        unique_id = None
        
        if current_master and model_id == current_master.model_id:
            status = 'master'
        elif current_apprentice and model_id == current_apprentice.model_id:
            status = 'apprentice'
            # Assuming app_model_router keeps track of unique_id for apprentices
            apprentice_info = next((e for e in all_managed_engines if e['config']['model_id'] == model_id and e['unique_id']), None)
            if apprentice_info:
                unique_id = apprentice_info['unique_id']
        # else: default to 'available' or 'retired' if explicitly managed by router but not active
        
        # Consider models that were once master and now retired
        # This logic needs to be enhanced if app_model_router tracks retired models
        
        all_models.append(
            EngineStatusResponse(
                **model_config.dict(), # Unpack PydanticModelConfig fields
                status=status,
                unique_id=unique_id
            )
        )
    return all_models

class ActiveEngines(BaseModel):
    master_engine_id: str
    apprentice_engine_id: Optional[str] = None

class ActiveEnginesResponse(BaseModel):
    master_engine_id: str
    apprentice_engine_id: Optional[str] = None

@router.get("/engines/active", response_model=ActiveEnginesResponse)
async def get_active_engines():
    """
    現在設定されているマスターエンジンとアプレンティスエンジンのIDを取得する。
    """
    master_model = app_model_router.get_master_model()
    apprentice_model = app_model_router.get_apprentice_model()
    return ActiveEnginesResponse(
        master_engine_id=master_model.model_id if master_model else None,
        apprentice_engine_id=apprentice_model.model_id if apprentice_model else None
    )

@router.post("/engines/active")
async def set_active_engines(engines: ActiveEngines):
    """
    マスターエンジンとアプレンティスエンジンを設定する。
    """
    if not app_model_router.set_master_model(engines.master_engine_id):
        raise HTTPException(status_code=400, detail=f"Master model '{engines.master_engine_id}' not found.")
    if engines.apprentice_engine_id:
        if not app_model_router.set_apprentice_model(engines.apprentice_engine_id):
            raise HTTPException(status_code=400, detail=f"Apprentice model '{engines.apprentice_engine_id}' not found.")
    else:
        app_model_router.set_apprentice_model(None) # Clear apprentice

    return {"status": "success", "message": f"Active engines set to {engines.master_engine_id} (Master) and {engines.apprentice_engine_id or 'None'} (Apprentice)."}

@router.post("/engines/swap", response_model=ActiveEnginesResponse)
async def swap_engines(request: EngineSwapRequest):
    """
    現在の師匠と指定した弟子を入れ替える。
    """
    if not app_model_router.swap_engines(request.apprentice_model_id):
        raise HTTPException(status_code=400, detail=f"Failed to swap engines with apprentice '{request.apprentice_model_id}'. Check logs.")
    
    master_model = app_model_router.get_master_model()
    apprentice_model = app_model_router.get_apprentice_model()
    return ActiveEnginesResponse(
        master_engine_id=master_model.model_id if master_model else None,
        apprentice_engine_id=apprentice_model.model_id if apprentice_model else None
    )

@router.post("/engines/promote", response_model=ActiveEnginesResponse)
async def promote_apprentice(request: EnginePromoteRequest):
    """
    指定した弟子を師匠に昇格させ、現在の師匠を引退させる。
    """
    if not app_model_router.promote_apprentice(request.apprentice_model_id):
        raise HTTPException(status_code=400, detail=f"Failed to promote apprentice '{request.apprentice_model_id}'. Check logs.")
    
    master_model = app_model_router.get_master_model()
    apprentice_model = app_model_router.get_apprentice_model()
    return ActiveEnginesResponse(
        master_engine_id=master_model.model_id if master_model else None,
        apprentice_engine_id=apprentice_model.model_id if apprentice_model else None
    )

@router.post("/engines/apprentice/new", response_model=NewApprenticeResponse)
async def create_new_apprentice_endpoint():
    """
    新しい「空っぽの弟子」推論エンジンを生成し、登録する。
    """
    new_apprentice_data = app_model_router.create_new_apprentice()
    if not new_apprentice_data:
        raise HTTPException(status_code=500, detail="Failed to create new apprentice engine.")
    
    return NewApprenticeResponse(
        new_apprentice_id=new_apprentice_data["config"]["model_id"],
        message=f"New apprentice '{new_apprentice_data['config']['display_name']}' created successfully."
    )

class ActiveDomain(BaseModel):
    domain_id: str

@router.post("/domains/active")
async def set_active_domain(domain: ActiveDomain):
    """
    推論に使用するアクティブなドメイン（知識DB）を設定する。
    """
    if not app_config_manager.set_active_domain(domain.domain_id):
        raise HTTPException(status_code=400, detail=f"Domain '{domain.domain_id}' not found or failed to set.")
    
    # ModelRouterにもアクティブドメインの変更を通知
    app_model_router.set_active_domain_id(domain.domain_id)
    return {"status": "success", "message": f"Active domain set to {domain.domain_id}."}

@router.post("/upload-gguf")
async def upload_gguf_model(file: UploadFile = File(...)):
    """
    GGUFモデルファイルをアップロードする。
    """
    file_path = os.path.join(GGUF_MODELS_DIR, file.filename)
    try:
        with open(file_path, "wb") as buffer:
            while True:
                chunk = await file.read(1024 * 1024) # 1MBずつ読み込み
                if not chunk:
                    break
                buffer.write(chunk)
        logger.info(f"Uploaded GGUF file saved to: {file_path}")
        return {"filename": file.filename, "path": file_path, "message": "GGUF model uploaded successfully."}
    except Exception as e:
        logger.error(f"Failed to upload GGUF file: {e}")
        raise HTTPException(status_code=500, detail=f"Failed to upload file: {e}")