import 'package:equatable/equatable.dart';
import 'package:halkyon_app/src/assistant/model/assistant_offer.dart';

/// An assistant the operator set in `deploy/assistants.env`, as the
/// operator's screen shows it (Halkyon Learn's ADR 0021, point 4): never
/// its key.
final class const SetUpAssistant({
  required final String id,
  required final String name,
  required final String protocol,
  required final String host,
  required final String model,
  final bool images = false,

  /// What a million of the request's tokens cost, in the instance's
  /// currency; null without prices.
  final double? priceInput,

  /// What a million of the answer's tokens cost; null without prices.
  final double? priceOutput,
}) with Equatable {
  /// What its limits are counted in: money with prices, else tokens (D38).
  AssistantLimitUnit get unit => priceInput != null && priceOutput != null
      ? AssistantLimitUnit.money
      : AssistantLimitUnit.tokens;

  @override
  List<Object?> get props => [
    id,
    name,
    protocol,
    host,
    model,
    images,
    priceInput,
    priceOutput,
  ];
}

/// The assistants the operator set, for their screen.
final class const AssistantsSetUp({
  /// Each, in the operator's order; none where none is set.
  final List<SetUpAssistant> assistants = const [],

  /// The currency of the prices (ISO 4217).
  final String currency = 'USD',

  /// Whether people may add their own keys.
  final bool ownKeys = false,
}) with Equatable {
  /// The assistant [id] names; null for one not set (any more).
  SetUpAssistant? named(String id) {
    for (final assistant in assistants) {
      if (assistant.id == id) {
        return assistant;
      }
    }
    return null;
  }

  @override
  List<Object?> get props => [assistants, currency, ownKeys];
}

/// An assistant granted to an account, as the operator sees it (D2, D4).
final class const AssistantGrant({
  /// The account's ID.
  required final String account,

  /// Its handle; null for one without.
  final String? handle,

  /// The assistant's ID.
  required final String assistant,

  /// Whether the assistant is still set; a grant of one taken out of the
  /// file stays, unused.
  final bool assistantSet = true,
  required final DateTime grantedAt,

  /// What [dailyLimit] and [monthlyLimit] are counted in.
  final AssistantLimitUnit unit = AssistantLimitUnit.tokens,
  final int? dailyLimit,
  final int? monthlyLimit,

  /// When the person agreed to what goes where; null until they do.
  final DateTime? agreedAt,

  /// Whether its limits are in another unit than the pricing's now, to be
  /// set again.
  final bool outdated = false,
}) with Equatable {
  @override
  List<Object?> get props => [
    account,
    handle,
    assistant,
    assistantSet,
    grantedAt,
    unit,
    dailyLimit,
    monthlyLimit,
    agreedAt,
    outdated,
  ];
}