import { ledgerThemeAccents, type CurrencyCode, type LedgerThemeId } from "@cents/domain";

export const ledgerThemes: ReadonlyArray<{
  id: LedgerThemeId;
  name: string;
  accent: string;
  gradient: string;
}> = [
  { id: "jade", name: "翡翠", accent: ledgerThemeAccents.jade, gradient: "linear-gradient(135deg, #118b79 0%, #087f72 48%, #285765 100%)" },
  { id: "ocean", name: "海湾", accent: ledgerThemeAccents.ocean, gradient: "linear-gradient(135deg, #167b93 0%, #3459a4 52%, #4b3f7f 100%)" },
  { id: "coral", name: "晚霞", accent: ledgerThemeAccents.coral, gradient: "linear-gradient(135deg, #c94f45 0%, #ad4869 54%, #6e4d82 100%)" },
  { id: "berry", name: "莓果", accent: ledgerThemeAccents.berry, gradient: "linear-gradient(135deg, #a84378 0%, #71468d 52%, #40578a 100%)" },
  { id: "meadow", name: "森野", accent: ledgerThemeAccents.meadow, gradient: "linear-gradient(135deg, #25805f 0%, #4e794b 54%, #766b35 100%)" },
  { id: "graphite", name: "暮色", accent: ledgerThemeAccents.graphite, gradient: "linear-gradient(135deg, #35585d 0%, #4e556e 52%, #303f55 100%)" },
];

export function ledgerTheme(themeId?: string) {
  return ledgerThemes.find((theme) => theme.id === themeId) ?? ledgerThemes[0];
}

export type LedgerRecord = {
  id: string;
  name: string;
  color: string;
  theme: LedgerThemeId;
  defaultCurrency: CurrencyCode;
  createdAt: string;
  updatedAt: string;
  archivedAt: string | null;
  role?: "owner" | "member";
  isPersonal: boolean;
};

export type UserPreference = {
  id: string;
  userId: string;
  key: "currentLedgerId";
  value: string;
  updatedAt: string;
};

export function currentLedgerPreferenceId(userId: string) {
  return `${userId}:currentLedgerId`;
}

export function createDefaultLedgers(): LedgerRecord[] {
  const now = new Date().toISOString();
  return [
    {
      id: "local-ledger",
      name: "家庭日常",
      color: "#087f72",
      theme: "jade",
      defaultCurrency: "CNY",
      createdAt: now,
      updatedAt: now,
      archivedAt: null,
      isPersonal: true,
    },
    {
      id: "travel-ledger",
      name: "旅行账本",
      color: "#3478e5",
      theme: "ocean",
      defaultCurrency: "CNY",
      createdAt: now,
      updatedAt: now,
      archivedAt: null,
      isPersonal: false,
    },
  ];
}