# app/api/v1/admin/settings.py
"""
Platform settings management endpoints.

Provides endpoints for:
- Viewing all platform settings
- Creating/updating settings
- Managing configuration by category
"""

import logging
from typing import Optional

from fastapi import APIRouter, Depends, Query
from sqlalchemy.orm import Session

from app.api.deps import get_current_admin_api
from app.core.database import get_db
from app.services.admin_settings_service import admin_settings_service
from app.services.admin_audit_service import admin_audit_service
from models.schema.admin import (
    AdminSettingCreate,
    AdminSettingResponse,
    AdminSettingUpdate,
    AdminSettingListResponse
)
from models.database.user import User

router = APIRouter(prefix="/settings")
logger = logging.getLogger(__name__)


@router.get("", response_model=AdminSettingListResponse)
def get_all_settings(
        category: Optional[str] = Query(None, description="Filter by category"),
        is_public: Optional[bool] = Query(None, description="Filter by public flag"),
        db: Session = Depends(get_db),
        current_admin: User = Depends(get_current_admin_api),
):
    """
    Get all platform settings.

    Can be filtered by category (system, security, marketplace, notifications)
    and by public flag (settings that can be exposed to frontend).
    """
    settings = admin_settings_service.get_all_settings(db, category, is_public)

    return AdminSettingListResponse(
        settings=settings,
        total=len(settings),
        category=category
    )


@router.get("/categories")
def get_setting_categories(
        db: Session = Depends(get_db),
        current_admin: User = Depends(get_current_admin_api),
):
    """Get list of all setting categories."""
    # This could be enhanced to return counts per category
    return {
        "categories": [
            "system",
            "security",
            "marketplace",
            "notifications",
            "integrations",
            "payments"
        ]
    }


@router.get("/{key}", response_model=AdminSettingResponse)
def get_setting(
        key: str,
        db: Session = Depends(get_db),
        current_admin: User = Depends(get_current_admin_api),
):
    """Get specific setting by key."""
    setting = admin_settings_service.get_setting_by_key(db, key)

    if not setting:
        from fastapi import HTTPException
        raise HTTPException(status_code=404, detail=f"Setting '{key}' not found")

    return AdminSettingResponse.model_validate(setting)


@router.post("", response_model=AdminSettingResponse)
def create_setting(
        setting_data: AdminSettingCreate,
        db: Session = Depends(get_db),
        current_admin: User = Depends(get_current_admin_api),
):
    """
    Create new platform setting.

    Setting keys should be lowercase with underscores (e.g., max_vendors_allowed).
    """
    result = admin_settings_service.create_setting(
        db=db,
        setting_data=setting_data,
        admin_user_id=current_admin.id
    )

    # Log action
    admin_audit_service.log_action(
        db=db,
        admin_user_id=current_admin.id,
        action="create_setting",
        target_type="setting",
        target_id=setting_data.key,
        details={"category": setting_data.category, "value_type": setting_data.value_type}
    )

    return result


@router.put("/{key}", response_model=AdminSettingResponse)
def update_setting(
        key: str,
        update_data: AdminSettingUpdate,
        db: Session = Depends(get_db),
        current_admin: User = Depends(get_current_admin_api),
):
    """Update existing setting value."""
    old_value = admin_settings_service.get_setting_value(db, key)

    result = admin_settings_service.update_setting(
        db=db,
        key=key,
        update_data=update_data,
        admin_user_id=current_admin.id
    )

    # Log action
    admin_audit_service.log_action(
        db=db,
        admin_user_id=current_admin.id,
        action="update_setting",
        target_type="setting",
        target_id=key,
        details={"old_value": str(old_value), "new_value": update_data.value}
    )

    return result


@router.post("/upsert", response_model=AdminSettingResponse)
def upsert_setting(
        setting_data: AdminSettingCreate,
        db: Session = Depends(get_db),
        current_admin: User = Depends(get_current_admin_api),
):
    """
    Create or update setting (upsert).

    If setting exists, updates its value. If not, creates new setting.
    """
    result = admin_settings_service.upsert_setting(
        db=db,
        setting_data=setting_data,
        admin_user_id=current_admin.id
    )

    # Log action
    admin_audit_service.log_action(
        db=db,
        admin_user_id=current_admin.id,
        action="upsert_setting",
        target_type="setting",
        target_id=setting_data.key,
        details={"category": setting_data.category}
    )

    return result


@router.delete("/{key}")
def delete_setting(
        key: str,
        confirm: bool = Query(False, description="Must be true to confirm deletion"),
        db: Session = Depends(get_db),
        current_admin: User = Depends(get_current_admin_api),
):
    """
    Delete platform setting.

    Requires confirmation parameter.
    WARNING: Deleting settings may affect platform functionality.
    """
    from fastapi import HTTPException

    if not confirm:
        raise HTTPException(
            status_code=400,
            detail="Deletion requires confirmation parameter: confirm=true"
        )

    message = admin_settings_service.delete_setting(
        db=db,
        key=key,
        admin_user_id=current_admin.id
    )

    # Log action
    admin_audit_service.log_action(
        db=db,
        admin_user_id=current_admin.id,
        action="delete_setting",
        target_type="setting",
        target_id=key,
        details={}
    )

    return {"message": message}