"""
Pydantic schemas per API.
"""
from typing import Optional, Any, List
from datetime import datetime, date
from decimal import Decimal
from uuid import UUID
from pydantic import BaseModel, Field


# ====================== Schema di rendicontazione (bando) ======================

class RemissionSchemaBase(BaseModel):
    schema_json: dict


class RemissionSchemaCreate(RemissionSchemaBase):
    pass


class RemissionSchemaUpdate(BaseModel):
    schema_json: Optional[dict] = None


class RemissionSchemaOut(BaseModel):
    id: UUID
    call_id: int
    schema_version: int
    status: str
    schema_json: dict
    created_by: int
    created_at: datetime
    updated_at: datetime
    published_at: Optional[datetime] = None
    published_by: Optional[int] = None

    model_config = {"from_attributes": True}


# ====================== Pratica di rendicontazione (beneficiario) ======================

class PracticeStartRequest(BaseModel):
    """Input minimo per avviare una pratica: solo application_id. Il resto viene dal DB."""
    application_id: int


class PracticeUpdate(BaseModel):
    iva_regime: Optional[str] = None
    notes_beneficiario: Optional[str] = None


# Fattura
class InvoiceCreate(BaseModel):
    category_code: str
    invoice_number: str
    invoice_date: date
    payment_date: date
    supplier_name: str
    supplier_vat: str
    description: str
    taxable: Decimal
    vat: Decimal = Decimal("0")
    total: Decimal
    pdf_filename: Optional[str] = None


class InvoiceOut(InvoiceCreate):
    id: UUID
    practice_id: UUID
    created_at: datetime

    model_config = {"from_attributes": True}


# ULA Employee
class UlaEmployeeCreate(BaseModel):
    codice_fiscale: str
    full_name: str
    contract_type: str
    role_description: Optional[str] = None
    fte_pct: Decimal = Decimal("1")
    period_start_date: date
    period_end_date: date
    supporting_doc_type: Optional[str] = None
    supporting_doc_filename: Optional[str] = None


class UlaEmployeeOut(UlaEmployeeCreate):
    id: UUID
    practice_id: UUID
    created_at: datetime

    model_config = {"from_attributes": True}


# Document
class DocumentUpsert(BaseModel):
    doc_code: str
    filename: Optional[str] = None
    uploaded_at: Optional[datetime] = None
    expires_at: Optional[date] = None
    notes: Optional[str] = None


class DocumentOut(BaseModel):
    id: UUID
    practice_id: UUID
    doc_code: str
    filename: Optional[str] = None
    uploaded_at: Optional[datetime] = None
    expires_at: Optional[date] = None
    notes: Optional[str] = None

    model_config = {"from_attributes": True}


# Pratica dettagliata
class PracticeOut(BaseModel):
    id: UUID
    call_id: int
    application_id: int
    company_id: int
    user_id: int
    status: str
    schema_snapshot: dict
    iva_regime: Optional[str] = None
    amount_erogato: Decimal
    notes_beneficiario: Optional[str] = None
    created_at: datetime
    updated_at: datetime
    submitted_at: Optional[datetime] = None

    invoices: List[InvoiceOut] = []
    ula_employees: List[UlaEmployeeOut] = []
    documents: List[DocumentOut] = []

    model_config = {"from_attributes": True}


class PracticeListItem(BaseModel):
    """Riga leggera per liste."""
    id: UUID
    call_id: int
    application_id: int
    company_id: int
    status: str
    amount_erogato: Decimal
    created_at: datetime
    submitted_at: Optional[datetime] = None

    # campi denormalizzati aggiunti a runtime
    call_name: Optional[str] = None
    company_name: Optional[str] = None
    invoice_count: int = 0
    ula_count: int = 0
    document_count: int = 0

    model_config = {"from_attributes": True}


# Gate check
class GateCheckResult(BaseModel):
    passed: bool
    checks: List[dict]  # [{id, label, passed, detail}]
    totals: dict        # {per_category: {B1: 1234.56, ...}, grand_total, max_remission_due, ...}


# ====================== Istruttoria ======================

class AmendmentRequestCreate(BaseModel):
    request_text: str
    deadline: date
    scope: Optional[dict] = None


class AmendmentResponseSubmit(BaseModel):
    response_text: str


class AmendmentRequestOut(BaseModel):
    id: UUID
    practice_id: UUID
    requested_by: int
    request_text: str
    scope: Optional[dict] = None
    deadline: date
    status: str
    response_text: Optional[str] = None
    response_at: Optional[datetime] = None
    closed_at: Optional[datetime] = None
    closed_by: Optional[int] = None
    created_at: datetime

    model_config = {"from_attributes": True}


class ReviewRejectBody(BaseModel):
    rejection_reason: str


class ReviewApproveBody(BaseModel):
    approved_remission: Optional[Decimal] = None
    notes: Optional[str] = None


class InstructorQueueItem(BaseModel):
    id: UUID
    call_id: int
    application_id: int
    company_id: int
    status: str
    amount_erogato: Decimal
    submitted_at: Optional[datetime] = None
    assigned_instructor_id: Optional[int] = None
    call_name: Optional[str] = None
    company_name: Optional[str] = None
    invoice_count: int = 0
    ula_count: int = 0
    document_count: int = 0
    open_amendments: int = 0
    remission_due: Optional[float] = None

    model_config = {"from_attributes": True}


# ====================== Wrapper ======================

class ApiResponse(BaseModel):
    status: str = "SUCCESS"
    message: Optional[str] = None
    data: Optional[Any] = None