"""Users API routes for VoIdea."""

from typing import Annotated, Any

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.dependencies import get_current_user, get_db
from app.models.user import User
from app.schemas.user import SubscriptionInfo, UserResponse, UserUpdate, VoiceSettingsResponse, VoiceSettingsUpdate
from app.services.tariff_service import TariffService
from app.services.user_service import UserService

router = APIRouter()


def _user_to_response(user: User) -> UserResponse:
    return UserResponse(
        id=str(user.id),
        email=user.email,
        display_name=user.display_name,
        avatar_url=user.avatar_url,
        is_active=user.is_active,
        is_superuser=user.is_superuser,
        oauth_provider=user.oauth_provider,
        created_at=user.created_at,
        updated_at=user.updated_at,
    )


@router.get("/me", response_model=UserResponse)
async def get_me(user: Annotated[User, Depends(get_current_user)]):
    return _user_to_response(user)


@router.patch("/me", response_model=UserResponse)
async def update_me(
    body: UserUpdate,
    user: Annotated[User, Depends(get_current_user)],
    db: AsyncSession = Depends(get_db),
):
    service = UserService(db)
    result = await service.update_profile(
        str(user.id),
        display_name=body.display_name,
        avatar_url=body.avatar_url,
    )
    if not result:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
    return _user_to_response(result)


@router.delete("/me", status_code=status.HTTP_204_NO_CONTENT)
async def delete_me(
    user: Annotated[User, Depends(get_current_user)],
    db: AsyncSession = Depends(get_db),
):
    service = UserService(db)
    await service.delete(str(user.id))


VOICE_PRESETS: dict[str, dict[str, Any]] = {
    "standard": {
        "vad_noise_threshold": 0.3,
        "vad_silence_timeout_ms": 1500,
        "confidence_verified": 80,
        "confidence_warning": 50,
        "semantic_mode": "fast",
        "tts_enabled": True,
        "continuous_listening": False,
    },
    "precise": {
        "vad_noise_threshold": 0.2,
        "vad_silence_timeout_ms": 2000,
        "confidence_verified": 85,
        "confidence_warning": 60,
        "semantic_mode": "full",
        "tts_enabled": True,
        "continuous_listening": False,
    },
    "fast": {
        "vad_noise_threshold": 0.4,
        "vad_silence_timeout_ms": 1000,
        "confidence_verified": 70,
        "confidence_warning": 40,
        "semantic_mode": "fast",
        "tts_enabled": False,
        "continuous_listening": True,
    },
    "quiet": {
        "vad_noise_threshold": 0.6,
        "vad_silence_timeout_ms": 3000,
        "confidence_verified": 80,
        "confidence_warning": 50,
        "semantic_mode": "fast",
        "tts_enabled": True,
        "continuous_listening": False,
    },
    "expert": {
        "vad_noise_threshold": 0.15,
        "vad_silence_timeout_ms": 1000,
        "confidence_verified": 90,
        "confidence_warning": 70,
        "semantic_mode": "full",
        "tts_enabled": True,
        "continuous_listening": True,
    },
}


@router.get("/me/voice-settings", response_model=VoiceSettingsResponse)
async def get_voice_settings(
    user: Annotated[User, Depends(get_current_user)],
):
    tuning = user.pipeline_tuning or {}
    preset = tuning.get("preset", "standard")
    overrides = tuning.get("overrides", {})
    return VoiceSettingsResponse(
        preset=preset,
        overrides=overrides,
        available_presets=list(VOICE_PRESETS.keys()),
        preset_values=VOICE_PRESETS.get(preset, VOICE_PRESETS["standard"]),
    )


@router.patch("/me/voice-settings", response_model=VoiceSettingsResponse)
async def update_voice_settings(
    body: VoiceSettingsUpdate,
    user: Annotated[User, Depends(get_current_user)],
    db: AsyncSession = Depends(get_db),
):
    from sqlalchemy import select

    tuning = user.pipeline_tuning or {}

    if body.reset:
        tuning = {"preset": "standard", "overrides": {}}
    else:
        if body.preset is not None:
            if body.preset not in VOICE_PRESETS:
                raise HTTPException(
                    status_code=status.HTTP_400_BAD_REQUEST,
                    detail=f"Unknown preset: {body.preset}. Available: {', '.join(VOICE_PRESETS.keys())}",
                )
            tuning["preset"] = body.preset

        if body.overrides is not None:
            existing_overrides = tuning.get("overrides", {})
            existing_overrides.update(body.overrides)
            tuning["overrides"] = existing_overrides

    result = await db.execute(select(User).where(User.id == user.id))
    db_user = result.scalar_one()
    db_user.pipeline_tuning = tuning
    await db.commit()

    preset = tuning.get("preset", "standard")
    preset_vals = VOICE_PRESETS.get(preset, VOICE_PRESETS["standard"])
    overrides = tuning.get("overrides", {})
    merged = {**preset_vals, **overrides}

    return VoiceSettingsResponse(
        preset=preset,
        overrides=overrides,
        available_presets=list(VOICE_PRESETS.keys()),
        preset_values=merged,
    )


@router.get("/me/subscription", response_model=SubscriptionInfo)
async def get_my_subscription(
    user: Annotated[User, Depends(get_current_user)],
    db: AsyncSession = Depends(get_db),
):
    svc = TariffService(db)
    sub = await svc.get_user_subscription(user.id)
    if not sub:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Subscription not found"
        )
    plan = await svc.get_plan_by_id(sub.plan_id)
    return SubscriptionInfo(
        plan_name=plan.name if plan else "Бесплатно",
        plan_code=plan.code if plan else "free",
        status=sub.status,
        expires_at=sub.current_period_end,
        features=plan.features if plan else None,
    )