"""
Schemas Pydantic per le caselle PEC (mailboxes).
Le credenziali vengono accettate in chiaro dalla API e cifrate nel service.
"""

import uuid
from datetime import datetime
from typing import Literal

from pydantic import BaseModel, EmailStr, Field, field_validator


# ─── Request schemas ──────────────────────────────────────────────────────────

class MailboxCreateRequest(BaseModel):
    """Dati per creare una nuova casella PEC."""

    email_address: EmailStr = Field(..., description="Indirizzo email PEC")
    display_name: str | None = Field(None, max_length=255, description="Nome visualizzato")
    provider: str | None = Field(None, max_length=100, description="Provider PEC (aruba, namirial...)")

    # Credenziali IMAP (in chiaro, cifrate prima della persistenza)
    imap_host: str = Field(..., min_length=1, max_length=255, description="Host IMAP")
    imap_port: int = Field(993, ge=1, le=65535, description="Porta IMAP")
    imap_user: str = Field(..., min_length=1, max_length=255, description="Username IMAP")
    imap_pass: str = Field(..., min_length=1, description="Password IMAP")
    imap_use_ssl: bool = Field(True, description="Usa SSL/TLS per IMAP")

    # Credenziali SMTP (in chiaro, cifrate prima della persistenza)
    smtp_host: str = Field(..., min_length=1, max_length=255, description="Host SMTP")
    smtp_port: int = Field(465, ge=1, le=65535, description="Porta SMTP")
    smtp_user: str = Field(..., min_length=1, max_length=255, description="Username SMTP")
    smtp_pass: str = Field(..., min_length=1, description="Password SMTP")
    smtp_use_tls: bool = Field(True, description="Usa TLS per SMTP")

    @field_validator("imap_port", "smtp_port")
    @classmethod
    def validate_port(cls, v: int) -> int:
        if v not in range(1, 65536):
            raise ValueError("Porta non valida")
        return v


class MailboxUpdateRequest(BaseModel):
    """Aggiornamento parziale di una casella PEC."""

    display_name: str | None = Field(None, max_length=255)
    provider: str | None = Field(None, max_length=100)
    status: Literal["active", "paused"] | None = None

    # Aggiornamento credenziali IMAP (opzionale)
    imap_host: str | None = Field(None, min_length=1, max_length=255)
    imap_port: int | None = Field(None, ge=1, le=65535)
    imap_user: str | None = Field(None, min_length=1, max_length=255)
    imap_pass: str | None = None
    imap_use_ssl: bool | None = None

    # Aggiornamento credenziali SMTP (opzionale)
    smtp_host: str | None = Field(None, min_length=1, max_length=255)
    smtp_port: int | None = Field(None, ge=1, le=65535)
    smtp_user: str | None = Field(None, min_length=1, max_length=255)
    smtp_pass: str | None = None
    smtp_use_tls: bool | None = None


# ─── Response schemas ─────────────────────────────────────────────────────────

class MailboxResponse(BaseModel):
    """Risposta API casella PEC – NON include mai le credenziali in chiaro."""

    id: uuid.UUID
    tenant_id: uuid.UUID
    email_address: str
    display_name: str | None
    provider: str | None

    # Info IMAP senza credenziali
    imap_host: str
    imap_port: int
    imap_use_ssl: bool

    # Info SMTP senza credenziali
    smtp_host: str
    smtp_port: int
    smtp_use_tls: bool

    # Stato sync
    status: str
    last_sync_at: datetime | None
    last_sync_uid: int | None
    sync_error_msg: str | None
    sync_error_count: int

    created_by: uuid.UUID | None
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class MailboxListResponse(BaseModel):
    items: list[MailboxResponse]
    total: int
    page: int
    page_size: int


class ConnectionTestRequest(BaseModel):
    """Test connessione IMAP/SMTP per una casella esistente o per credenziali nuove."""

    protocol: Literal["imap", "smtp"] = Field("imap", description="Protocollo da testare")


class ConnectionTestResult(BaseModel):
    success: bool
    message: str
    latency_ms: float | None = None
    capabilities: list[str] | None = None  # Solo per IMAP