const { DataTypes } = require('sequelize');
const sequelize = require('../config/db');

const TenantBillingDetail = sequelize.define('TenantBillingDetail', {
  id: {
    type: DataTypes.INTEGER,
    primaryKey: true,
    autoIncrement: true,
    comment: 'ID'
  },
  tenantId: {
    type: DataTypes.INTEGER,
    allowNull: false,
    comment: 'Tenant ID'
  },
  billingPeriod: {
    type: DataTypes.STRING(7),
    allowNull: false,
    comment: 'Billing period, format YYYY-MM'
  },
  planId: {
    type: DataTypes.INTEGER,
    allowNull: true,
    comment: 'Subscription plan ID'
  },
  baseAmount: {
    type: DataTypes.DECIMAL(10, 2),
    allowNull: false,
    defaultValue: 0,
    comment: 'Base subscription amount'
  },
  extraAmount: {
    type: DataTypes.DECIMAL(10, 2),
    allowNull: false,
    defaultValue: 0,
    comment: 'Overage amount'
  },
  discountAmount: {
    type: DataTypes.DECIMAL(10, 2),
    allowNull: false,
    defaultValue: 0,
    comment: 'Discount amount'
  },
  totalAmount: {
    type: DataTypes.DECIMAL(10, 2),
    allowNull: false,
    defaultValue: 0,
    comment: 'Total amount'
  },
  status: {
    type: DataTypes.ENUM('pending', 'paid', 'overdue'),
    allowNull: false,
    defaultValue: 'pending',
    comment: 'Billing detail status'
  },
  paidTime: {
    type: DataTypes.DATE,
    allowNull: true,
    comment: 'Paid time'
  },
  createTime: {
    type: DataTypes.DATE,
    allowNull: false,
    defaultValue: DataTypes.NOW,
    comment: 'Created time'
  },
  updateTime: {
    type: DataTypes.DATE,
    allowNull: false,
    defaultValue: DataTypes.NOW,
    comment: 'Updated time'
  }
}, {
  tableName: 'tenant_billing_details',
  timestamps: false,
  indexes: [
    { name: 'idx_tenant_period', unique: true, fields: ['tenantId', 'billingPeriod'] },
    { name: 'idx_tenant', fields: ['tenantId'] },
    { name: 'idx_status', fields: ['status'] }
  ],
  comment: 'Tenant billing detail table'
});

module.exports = TenantBillingDetail;