import { model, models, Schema, type InferSchemaType, type Model } from "mongoose";
import { ACCOUNT_TYPES, DUE_RULE_KINDS, MEAL_CARD_PROVIDERS } from "@/shared/accounts";
import { ICON_KEYS, SWATCHES } from "@/shared/appearance";

/**
 * Hesap (Bölüm 6.1). Tutarlar kuruş. Bakiye işareti: varlık pozitif, kart borcu negatif.
 * Güncel bakiyenin tek doğruluk kaynağı işlemlerdir (Faz 6b); `balanceCacheMinor` yalnızca önbellek.
 */
const overdraftSchema = new Schema(
  {
    enabled: { type: Boolean, default: false },
    limitMinor: { type: Number, min: 0, default: 0 },
    /** Aylık faiz oranı, baz puan (4,25% → 425). */
    monthlyRateBp: { type: Number, min: 0, max: 10_000, default: null },
    statementDay: { type: Number, min: 1, max: 31, default: null },
  },
  { _id: false },
);

const creditCardSchema = new Schema(
  {
    limitMinor: { type: Number, min: 0, default: 0 },
    /** Hesap kesim günü; ayda yoksa (31) ayın son günü kullanılır (Faz 7). */
    statementDay: { type: Number, min: 1, max: 31, default: 1 },
    dueRule: {
      kind: { type: String, enum: DUE_RULE_KINDS, default: "daysAfter" },
      value: { type: Number, min: 1, max: 31, default: 10 },
    },
    /**
     * Asgari ödeme oranı, baz puan (2000 = %20). null → varsayılan kural: limit 50.000 TL altı %20,
     * üstü %40 (Faz 7 kararı).
     */
    minimumPaymentRateBp: { type: Number, min: 0, max: 10_000, default: null },
    /** Kart borcunun ödeneceği varsayılan hesap. */
    paymentAccountId: { type: Schema.Types.ObjectId, default: null },
  },
  { _id: false },
);

const accountSchema = new Schema(
  {
    householdId: { type: Schema.Types.ObjectId, required: true },
    name: { type: String, required: true, trim: true, maxlength: 80 },
    type: { type: String, enum: ACCOUNT_TYPES, required: true },
    institution: { type: String, trim: true, maxlength: 80, default: "" },
    mealCardProvider: { type: String, enum: [...MEAL_CARD_PROVIDERS, null], default: null },
    /** İleride döviz hesabı için; şimdilik yalnızca TRY. */
    currency: { type: String, enum: ["TRY"], default: "TRY" },
    openingBalanceMinor: { type: Number, required: true, default: 0 },
    openingDate: { type: Date, required: true },
    color: { type: String, enum: SWATCHES, default: "blue" },
    icon: { type: String, enum: ICON_KEYS, default: "wallet" },
    order: { type: Number, default: 0 },
    archivedAt: { type: Date, default: null },
    /** Hesabın sahibi kişi (hane üyesi). "Yalnızca ben" hesaplarında bakiyeyi yalnızca o görür. */
    ownerUserId: { type: Schema.Types.ObjectId, default: null },
    isPrivate: { type: Boolean, default: false },
    overdraft: { type: overdraftSchema, default: null },
    creditCard: { type: creditCardSchema, default: null },
    balanceCacheMinor: { type: Number, default: null },
    createdBy: { type: Schema.Types.ObjectId, required: true },
    updatedBy: { type: Schema.Types.ObjectId, required: true },
  },
  { timestamps: true, collection: "accounts" },
);

accountSchema.index({ householdId: 1, archivedAt: 1, order: 1 });

export type Account = InferSchemaType<typeof accountSchema>;

export const AccountModel: Model<Account> =
  (models.Account as Model<Account> | undefined) ?? model<Account>("Account", accountSchema);