const PRODUCT_BASE = {
  exchange_code: 'SSE',
  product_category: 'ETF',
  risk_level: 'R3',
  fund_manager: '南方基金管理股份有限公司',
  currency: 'CNY',
  lot_size: '100.0000',
  price_tick: '0.001000',
  min_amount: '100.00',
  open_start_at: null,
  open_end_at: null,
  open_period_start: null,
  open_period_end: null,
  transaction_fee_rate: '0.000500',
  single_investor_max_holding_ratio: '10.0000',
  management_fee_rate: '0.5000',
  custodian_fee_rate: '0.1000',
  risk_disclosure_required: 1,
  second_confirmation_required: 0,
  recording_required: 0,
  status: '正常',
  created_at: '2026-01-02T09:00:00',
  updated_at: '2026-09-11T15:00:00',
};

export const MOCK_PRODUCTS = Object.freeze([
  { ...PRODUCT_BASE, id: 1, product_code: '510300', product_name: '南方沪深300ETF', current_nav: '4.218000', current_nav_at: '2026-09-11T15:00:00', product_category: '宽基ETF', risk_level: 'R3' },
  { ...PRODUCT_BASE, id: 2, product_code: '510500', product_name: '南方中证500ETF', current_nav: '6.742000', current_nav_at: '2026-09-11T15:00:00', product_category: '宽基ETF', risk_level: 'R4' },
  { ...PRODUCT_BASE, id: 3, product_code: '159915', product_name: '南方创业板ETF', current_nav: '2.184000', current_nav_at: '2026-09-11T15:00:00', product_category: '成长ETF', risk_level: 'R4', exchange_code: 'SZSE' },
  { ...PRODUCT_BASE, id: 4, product_code: '512100', product_name: '南方中证1000ETF', current_nav: '2.367000', current_nav_at: '2026-09-11T15:00:00', product_category: '宽基ETF', risk_level: 'R4' },
  { ...PRODUCT_BASE, id: 5, product_code: '513100', product_name: '南方纳指ETF', current_nav: '1.728000', current_nav_at: '2026-09-11T15:00:00', product_category: '跨境ETF', risk_level: 'R5' },
  { ...PRODUCT_BASE, id: 6, product_code: '511360', product_name: '南方短融ETF', current_nav: '110.126000', current_nav_at: '2026-09-11T15:00:00', product_category: '债券ETF', risk_level: 'R2' },
  { ...PRODUCT_BASE, id: 7, product_code: '159645', product_name: '南方新能源ETF', current_nav: '0.864000', current_nav_at: '2026-09-11T15:00:00', product_category: '行业ETF', risk_level: 'R5', exchange_code: 'SZSE' },
  { ...PRODUCT_BASE, id: 8, product_code: '159925', product_name: '南方沪深300成长ETF', current_nav: '1.462000', current_nav_at: '2026-09-11T15:00:00', product_category: '策略ETF', risk_level: 'R4', exchange_code: 'SZSE' },
]);

const CLOSE_SERIES = [4.02, 4.08, 4.05, 4.12, 4.16, 4.11, 4.19, 4.23, 4.18, 4.26, 4.21, 4.218];

export function getMockNavHistory(productId) {
  const product = MOCK_PRODUCTS.find((item) => item.id === Number(productId)) || MOCK_PRODUCTS[0];
  const ratio = Number(product.current_nav) / CLOSE_SERIES.at(-1);
  return CLOSE_SERIES.map((close, index) => ({
    id: product.id * 100 + index,
    product_id: product.id,
    nav_date: `2026-${String(index + 1).padStart(2, '0')}-11`,
    nav: (close * ratio).toFixed(6),
    created_at: `2026-${String(index + 1).padStart(2, '0')}-11T15:00:00`,
  }));
}

export const MOCK_RANKING_CHANGE = Object.freeze({
  '510300': 1.26,
  '510500': 2.18,
  '159915': -0.42,
  '512100': 1.88,
  '513100': 0.76,
  '511360': 0.05,
  '159645': -1.12,
  '159925': 1.54,
});

export const MOCK_SOURCE_NOTICE = '公开产品接口尚未提供，本页使用与 fin_product、fin_nav_history 模型同字段的演示数据。';