"""
web/models.py — Pydantic request/response schemas.
"""

import re
from typing import Literal

from pydantic import BaseModel, field_validator


# ─── Auth ─────────────────────────────────────────────────────────────────────

class LoginRequest(BaseModel):
    username: str
    password: str


# ─── Keyword groups ───────────────────────────────────────────────────────────

class PatternEntry(BaseModel):
    regex: str
    label: str

    @field_validator("regex")
    @classmethod
    def regex_must_compile(cls, v: str) -> str:
        try:
            re.compile(v, re.IGNORECASE)
        except re.error as e:
            raise ValueError(f"Invalid regex: {e}") from e
        return v


class KeywordGroup(BaseModel):
    id:       str
    name:     str
    patterns: list[PatternEntry]


class KeywordGroupsPayload(BaseModel):
    groups: list[KeywordGroup]


# ─── Channels ─────────────────────────────────────────────────────────────────

class ChannelsPayload(BaseModel):
    channels: list[str | int]


# ─── Users ───────────────────────────────────────────────────────────────────

Role = Literal["superadmin", "admin", "reader"]


class CreateUserRequest(BaseModel):
    username: str
    password: str
    role:     Role


class UpdateUserRequest(BaseModel):
    password: str | None = None
    role:     Role | None = None
    is_active: bool | None = None