from pydantic import BaseModel, Field
from typing import List, Optional

class AuditParaSchema(BaseModel):
    audit_para_number: Optional[int] = Field(None, description="The number of the audit para.")
    audit_para_heading: Optional[str] = Field(None, description="The original heading from the DAR.")
    revenue_involved_lakhs_rs: Optional[float] = Field(None, description="Revenue involved in Lakhs Rs.")
    revenue_recovered_lakhs_rs: Optional[float] = Field(None, description="Revenue recovered in Lakhs Rs.")
    status_of_para: Optional[str] = Field(None, description="Status of the para, e.g., 'Agreed and Paid'.")

class DARHeaderSchema(BaseModel):
    audit_group_number: Optional[int] = Field(None, description="Audit Group Number.")
    gstin: Optional[str] = Field(None, description="GSTIN of the taxpayer.")
    trade_name: Optional[str] = Field(None, description="Name of the taxpayer.")
    category: Optional[str] = Field(None, description="Category of the taxpayer.")
    total_amount_detected_overall_rs: Optional[float] = Field(None, description="Overall total amount detected in Rs.")
    total_amount_recovered_overall_rs: Optional[float] = Field(None, description="Overall total amount recovered in Rs.")

class ParsedDARReport(BaseModel):
    header: Optional[DARHeaderSchema] = None
    audit_paras: List[AuditParaSchema] = []
    parsing_errors: Optional[str] = Field(None, description="Errors from the parsing process.")

class HarmonisedPara(BaseModel):
    """A model to hold the original and its corresponding harmonised heading."""
    original_heading: str
    harmonised_heading: str