"""Pydantic schemas for DATEV export request and response bodies."""

import uuid
from datetime import date, datetime
from decimal import Decimal
from typing import Optional

from pydantic import BaseModel, ConfigDict, Field, model_validator


class DATEVExportCreate(BaseModel):
    """POST /api/v1/datev/export request body."""

    start_date: date = Field(..., description="Start date of the export range")
    end_date: date = Field(..., description="End date of the export range (inclusive)")

    @model_validator(mode="after")
    def validate_date_range(self) -> "DATEVExportCreate":
        """Ensure start_date is not after end_date."""
        if self.start_date > self.end_date:
            raise ValueError("start_date must not be after end_date")
        return self


class DATEVExportResponse(BaseModel):
    """DATEV export response schema."""

    model_config = ConfigDict(from_attributes=True)

    id: uuid.UUID
    start_date: date
    end_date: date
    file_path: Optional[str] = None
    total_amount: Decimal
    created_at: Optional[datetime] = None


class DATEVExportListResponse(BaseModel):
    """Paginated DATEV export list response."""

    items: list[DATEVExportResponse]
    total: int
    page: int
    page_size: int