from datetime import datetime, timezone
from datetime import date
from typing import Literal
from uuid import UUID

from pydantic import BaseModel, ConfigDict, EmailStr, Field


class AccountRegister(BaseModel):
    account_type: Literal["individual", "company"]
    email_name: str = Field(
        min_length=1,
        max_length=64,
        pattern=r"^[A-Za-z0-9](?:[A-Za-z0-9._-]{0,62}[A-Za-z0-9])?$",
    )
    company_domain: str | None = Field(default=None, max_length=253)
    first_name: str = Field(min_length=1, max_length=80)
    last_name: str = Field(min_length=1, max_length=80)
    date_of_birth: date
    phone_number: str = Field(
        min_length=7,
        max_length=24,
        pattern=r"^\+?[0-9][0-9 ()-]{5,22}[0-9]$",
    )
    password: str = Field(min_length=8, max_length=128)


class AccountRead(BaseModel):
    id: UUID
    account_type: str
    email: EmailStr
    first_name: str
    last_name: str
    date_of_birth: date
    phone_number: str
    company_domain: str | None
    created_at: datetime

    model_config = ConfigDict(from_attributes=True)


class LoginRequest(BaseModel):
    email: EmailStr
    password: str = Field(min_length=1, max_length=128)


class AuthResponse(BaseModel):
    access_token: str
    token_type: Literal["bearer"] = "bearer"
    account: AccountRead


class EmailCreate(BaseModel):
    recipients: list[EmailStr] = Field(min_length=1)
    cc: list[EmailStr] = Field(default_factory=list)
    bcc: list[EmailStr] = Field(default_factory=list)
    subject: str = Field(default="", max_length=998, pattern=r"^[^\r\n]*$")
    body_text: str = ""
    body_html: str | None = None


class EmailRead(EmailCreate):
    id: str
    sender: EmailStr
    status: str
    created_at: datetime


class MailAddress(BaseModel):
    name: str
    address: str


class AttachmentRead(BaseModel):
    filename: str
    content_type: str
    size: int
    content_id: str | None = None
    disposition: str = "attachment"


class MessageSummary(BaseModel):
    id: str
    mailbox: Literal["inbox", "sent", "trash"]
    direction: Literal["inbound", "outbound"]
    sender: MailAddress
    recipients: list[MailAddress]
    subject: str
    snippet: str
    status: str
    created_at: datetime
    is_read: bool
    is_starred: bool = False
    trashed_at: datetime | None = None
    attachments: list[AttachmentRead] = Field(default_factory=list)


class MessageRead(MessageSummary):
    cc: list[MailAddress] = Field(default_factory=list)
    bcc: list[MailAddress] = Field(default_factory=list)
    reply_to: list[MailAddress] = Field(default_factory=list)
    body_text: str = ""
    body_html: str | None = None
    message_id: str | None = None


class MessageReadState(BaseModel):
    is_read: bool


class MessageStarState(BaseModel):
    is_starred: bool


class StickyNoteCreate(BaseModel):
    title: str = Field(min_length=1, max_length=120)
    body: str = Field(default="", max_length=2000)
    tags: list[str] = Field(default_factory=list, max_length=5)
    color: Literal["yellow", "green", "blue", "pink"] = "yellow"


class StickyNoteUpdate(BaseModel):
    title: str | None = Field(default=None, min_length=1, max_length=120)
    body: str | None = Field(default=None, max_length=2000)
    tags: list[str] | None = Field(default=None, max_length=5)
    color: Literal["yellow", "green", "blue", "pink"] | None = None


class StickyNoteRead(StickyNoteCreate):
    id: str
    created_at: datetime
    updated_at: datetime


class MessagePage(BaseModel):
    items: list[MessageSummary]
    next_cursor: str | None = None


class DomainCreate(BaseModel):
    domain_name: str = Field(min_length=3, max_length=253)
    account_id: UUID | None = None


class DnsRecordRead(BaseModel):
    id: UUID
    record_type: str
    host: str
    value: str
    purpose: str
    ttl: int

    model_config = ConfigDict(from_attributes=True)


class DnsVerificationCheck(BaseModel):
    purpose: str
    verified: bool
    message: str


class DnsVerificationResponse(BaseModel):
    domain: str
    status: str
    verified: bool
    checks: list[DnsVerificationCheck]


class MailDomainRead(BaseModel):
    id: UUID
    domain_name: str
    domain_type: str
    account_id: UUID | None
    mail_host: str
    dkim_selector: str
    status: str
    created_at: datetime
    dns_records: list[DnsRecordRead] = []

    model_config = ConfigDict(from_attributes=True)


class SmtpCredentialCreate(BaseModel):
    label: str = Field(default="default", min_length=1, max_length=120)


class SmtpCredentialRead(BaseModel):
    id: UUID
    username: str
    label: str
    is_active: bool
    created_at: datetime

    model_config = ConfigDict(from_attributes=True)


class SmtpCredentialCreated(SmtpCredentialRead):
    password: str
    smtp_host: str
    smtp_port: int
    use_tls: bool


class DnsSetupRequest(BaseModel):
    domain: str = Field(min_length=3, max_length=253)
    mail_server_ip: str = Field(min_length=3, max_length=45)


class DnsSetupRecord(BaseModel):
    record_type: str
    host: str
    value: str
    purpose: str
    ttl: int
    priority: int | None = None


class DnsSetupResponse(BaseModel):
    domain: str
    mail_host: str
    app_public_host: str
    mail_server_ip: str
    is_platform_domain: bool
    sections: dict[str, list[DnsSetupRecord]]
    notes: list[str] = Field(default_factory=list)


def utc_now() -> datetime:
    return datetime.now(timezone.utc)