from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel
from sqlalchemy.exc import IntegrityError
from sqlalchemy.orm import Session as DBSession

from app.core.auth import require_settings_password
from app.db.database import get_db
from app.db.models import ModelPreset

router = APIRouter(prefix="/api/models", tags=["models"])


class ModelPresetResponse(BaseModel):
    id: int
    label: str
    value: str

    class Config:
        from_attributes = True


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


@router.get("", response_model=list[ModelPresetResponse])
def list_model_presets(db: DBSession = Depends(get_db)):
    """モデル選択プルダウンの表示に使うため認証不要（誰でも読める）。"""
    return db.query(ModelPreset).order_by(ModelPreset.id).all()


@router.post("", response_model=ModelPresetResponse, dependencies=[Depends(require_settings_password)])
def create_model_preset(req: ModelPresetRequest, db: DBSession = Depends(get_db)):
    preset = ModelPreset(label=req.label, value=req.value)
    db.add(preset)
    try:
        db.commit()
    except IntegrityError as e:
        db.rollback()
        raise HTTPException(status_code=400, detail=f"モデル文字列が重複しています: {req.value}") from e
    db.refresh(preset)
    return preset


@router.put("/{preset_id}", response_model=ModelPresetResponse, dependencies=[Depends(require_settings_password)])
def update_model_preset(preset_id: int, req: ModelPresetRequest, db: DBSession = Depends(get_db)):
    preset = db.get(ModelPreset, preset_id)
    if not preset:
        raise HTTPException(status_code=404, detail="Model preset not found")
    preset.label = req.label
    preset.value = req.value
    try:
        db.commit()
    except IntegrityError as e:
        db.rollback()
        raise HTTPException(status_code=400, detail=f"モデル文字列が重複しています: {req.value}") from e
    db.refresh(preset)
    return preset


@router.delete("/{preset_id}", status_code=204, dependencies=[Depends(require_settings_password)])
def delete_model_preset(preset_id: int, db: DBSession = Depends(get_db)):
    preset = db.get(ModelPreset, preset_id)
    if preset:
        db.delete(preset)
        db.commit()