import React, { createContext, useContext, useEffect, useMemo, useState } from 'react';
import ReactDOM from 'react-dom/client';
import { ConfigProvider, App as AntApp, theme as antdTheme } from 'antd';
import zhCN from 'antd/locale/zh_CN';
import { BrowserRouter } from 'react-router-dom';
import App from './App';
import './styles.css';

type ThemeMode = 'light' | 'dark';

interface ThemeCtx {
  mode: ThemeMode;
  toggle: () => void;
  setMode: (m: ThemeMode) => void;
}

const ThemeContext = createContext<ThemeCtx>({
  mode: 'light',
  toggle: () => {},
  setMode: () => {}
});

export const useTheme = () => useContext(ThemeContext);

function ThemeProvider({ children }: { children: React.ReactNode }) {
  const [mode, setMode] = useState<ThemeMode>(() => {
    const saved = localStorage.getItem('app-theme');
    if (saved === 'dark' || saved === 'light') return saved;
    return 'light';
  });

  useEffect(() => {
    document.documentElement.setAttribute('data-theme', mode);
    localStorage.setItem('app-theme', mode);
  }, [mode]);

  const isDark = mode === 'dark';

  const themeConfig = useMemo(
    () => ({
      algorithm: isDark ? antdTheme.darkAlgorithm : antdTheme.defaultAlgorithm,
      token: {
        colorPrimary: isDark ? '#e07b3e' : '#c2541f',
        colorInfo: isDark ? '#e07b3e' : '#c2541f',
        colorBgBase: isDark ? '#1a1816' : '#faf9f5',
        colorBgContainer: isDark ? '#221f1c' : '#ffffff',
        colorBgElevated: isDark ? '#2b2824' : '#ffffff',
        colorBgLayout: isDark ? '#1a1816' : '#faf9f5',
        colorBorder: isDark ? '#36322c' : '#ebe7da',
        colorBorderSecondary: isDark ? '#2b2824' : '#f0ece0',
        colorText: isDark ? '#f3efe6' : '#2a2622',
        colorTextSecondary: isDark ? '#b6afa3' : '#6b6660',
        colorTextTertiary: isDark ? '#7e7869' : '#a09a8e',
        colorSuccess: isDark ? '#7fb87d' : '#4f8a4d',
        colorWarning: isDark ? '#d49a4a' : '#b8782a',
        colorError: isDark ? '#e07060' : '#c0392b',
        borderRadius: 10,
        borderRadiusLG: 12,
        borderRadiusSM: 6,
        fontFamily:
          "'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif",
        fontSize: 14,
        controlHeight: 36,
        wireframe: false
      },
      components: {
        Button: {
          borderRadius: 10,
          fontWeight: 500,
          controlHeight: 36,
          primaryShadow: 'none',
          defaultShadow: 'none'
        },
        Card: {
          borderRadiusLG: 14
        },
        Input: {
          borderRadius: 10,
          controlHeight: 38
        },
        Modal: {
          borderRadiusLG: 16,
          paddingContentHorizontalLG: 24
        },
        Tabs: {
          itemHoverColor: isDark ? '#e07b3e' : '#c2541f',
          itemSelectedColor: isDark ? '#e07b3e' : '#c2541f',
          inkBarColor: isDark ? '#e07b3e' : '#c2541f'
        },
        Menu: {
          itemBorderRadius: 8,
          itemSelectedBg: isDark ? '#2d2017' : '#fdf2ea',
          itemSelectedColor: isDark ? '#e07b3e' : '#c2541f'
        },
        Drawer: {
          paddingLG: 20
        },
        Tag: {
          borderRadiusSM: 6
        }
      }
    }),
    [isDark]
  );

  const ctxValue = useMemo<ThemeCtx>(
    () => ({
      mode,
      toggle: () => setMode((m) => (m === 'dark' ? 'light' : 'dark')),
      setMode
    }),
    [mode]
  );

  return (
    <ThemeContext.Provider value={ctxValue}>
      <ConfigProvider locale={zhCN} theme={themeConfig}>
        <AntApp>{children}</AntApp>
      </ConfigProvider>
    </ThemeContext.Provider>
  );
}

ReactDOM.createRoot(document.getElementById('root')!).render(
  <React.StrictMode>
    <ThemeProvider>
      <BrowserRouter>
        <App />
      </BrowserRouter>
    </ThemeProvider>
  </React.StrictMode>
);
