"""Patient-facing dialog texts from `config/texts/dialog.yaml` (ADR-008: texts live in config, not code)."""

from functools import lru_cache
from pathlib import Path

import yaml
from pydantic import BaseModel, ConfigDict, Field

from app.config import get_settings


class _Strict(BaseModel):
    # A typo in a YAML key must fail at load time, not silently show an empty message to a patient.
    model_config = ConfigDict(extra="forbid", frozen=True)


class DialogSettings(_Strict):
    cssrs_cooldown_hours: float = 24
    max_safety_events: int = 50
    crisis_flags: list[str] = Field(default_factory=list)
    risk_screen_scale: str = "cssrs_screen"
    abandon_after_hours: float = 6


class Commands(_Strict):
    revoke: list[str]


class ConsentTexts(_Strict):
    version: str
    text: str
    accept: str
    decline: str
    refused: str
    reconsider: str
    code_invalid: str


class AgeGateTexts(_Strict):
    question: str
    adult: str
    minor: str
    unclear: str
    minor_stop: str


class IdleButtons(_Strict):
    checkin: str
    med_question: str
    kb_question: str
    contact_doctor: str
    revoke: str


class IdleTexts(_Strict):
    welcome: str
    menu_prompt: str
    buttons: IdleButtons
    stub_checkin: str
    stub_med_question: str
    contact_doctor_ack: str
    visit_stub: str


class RevokedTexts(_Strict):
    confirm: str


class CrisisTexts(_Strict):
    repeat: str
    hold: str
    closed: str


class ScaleTexts(_Strict):
    intro: str
    question: str
    clarify: str
    buttons_only: str
    done: str
    risk_screen_intro: str


class SafetyPlanTexts(_Strict):
    title: str
    template: list[str]
    means_restriction: str


class ReachOutTexts(_Strict):
    silence: str
    missed_doses: str
    default: str


class VisitTexts(_Strict):
    button: str


class DialogTexts(_Strict):
    status: str
    settings: DialogSettings
    commands: Commands
    consent: ConsentTexts
    age_gate: AgeGateTexts
    idle: IdleTexts
    revoked: RevokedTexts
    crisis: CrisisTexts
    scale: ScaleTexts
    safety_plan: SafetyPlanTexts
    reach_out: ReachOutTexts
    visit: VisitTexts
    unavailable: str


def dialog_texts_path() -> Path:
    return get_settings().config_dir / "texts" / "dialog.yaml"


@lru_cache
def load_dialog_texts(path: Path | None = None) -> DialogTexts:
    path = path or dialog_texts_path()
    return DialogTexts.model_validate(yaml.safe_load(path.read_text(encoding="utf-8")))