import 'package:flutter/material.dart';
import 'app_dims.g.dart';
import 'app_tokens.g.dart';

ThemeData buildTheme(String key) {
  final t = appTokensOf(key);
  final brightness = t.isDark ? Brightness.dark : Brightness.light;
  final scheme = ColorScheme.fromSeed(
    seedColor: t.primary,
    brightness: brightness,
  ).copyWith(
    primary: t.primary,
    onPrimary: t.onPrimary,
    surface: t.surface,
    error: t.danger,
  );
  return ThemeData(
    useMaterial3: true,
    brightness: brightness,
    colorScheme: scheme,
    scaffoldBackgroundColor: t.bg,
    // 桌面端默认 adaptivePlatformDensity=compact 会把输入框/按钮压矮 8px，
    // 与原型 px 规格（.input h38 等）和 golden（测试环境=standard）不一致——
    // 真机曾因此输入框只有 ~30 高。锁 standard，三端渲染与原型同几何。
    visualDensity: VisualDensity.standard,
    // ── 对话框/输入框/按钮的 Material 默认样式钉到 ds 真相源 ──
    // 原型 .modal：surface / border / r-xl / 标题 fs-h2 heading
    dialogTheme: DialogThemeData(
      backgroundColor: t.surface,
      surfaceTintColor: Colors.transparent,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(AppDims.rXl),
        side: BorderSide(color: t.border),
      ),
      titleTextStyle: TextStyle(
          fontSize: AppDims.fsH2,
          fontWeight: FontWeight.w700,
          color: t.heading),
      contentTextStyle: TextStyle(fontSize: AppDims.fsBody, color: t.text),
    ),
    // 原型 .input：h38 盒式（surface/1px border/r-md/pad 0 11），聚焦主色边。
    // 全局兜底——未显式给 decoration 边框的 TextField/DropdownButtonFormField
    // 一律盒式，禁止 Material 默认下划线再出现。
    inputDecorationTheme: InputDecorationTheme(
      isDense: true,
      filled: true,
      fillColor: t.surface,
      hintStyle: TextStyle(fontSize: AppDims.fsBody, color: t.faint),
      labelStyle: TextStyle(fontSize: AppDims.fsSm, color: t.muted),
      contentPadding: const EdgeInsets.symmetric(horizontal: 11, vertical: 9),
      enabledBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(AppDims.rMd),
        borderSide: BorderSide(color: t.border),
      ),
      disabledBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(AppDims.rMd),
        borderSide: BorderSide(color: t.border),
      ),
      focusedBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(AppDims.rMd),
        borderSide: BorderSide(color: t.primary),
      ),
      border: OutlineInputBorder(
        borderRadius: BorderRadius.circular(AppDims.rMd),
        borderSide: BorderSide(color: t.border),
      ),
    ),
    // 原型 .btn.primary：primary 底 / onPrimary 字 / h38 / r-md / w600 / 无阴影
    elevatedButtonTheme: ElevatedButtonThemeData(
      style: ElevatedButton.styleFrom(
        backgroundColor: t.primary,
        foregroundColor: t.onPrimary,
        elevation: 0,
        minimumSize: const Size(0, 38),
        padding: const EdgeInsets.symmetric(horizontal: 16),
        textStyle: const TextStyle(
            fontSize: AppDims.fsBody, fontWeight: FontWeight.w600),
        shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(AppDims.rMd)),
      ),
    ),
    filledButtonTheme: FilledButtonThemeData(
      style: FilledButton.styleFrom(
        backgroundColor: t.primary,
        foregroundColor: t.onPrimary,
        minimumSize: const Size(0, 38),
        padding: const EdgeInsets.symmetric(horizontal: 16),
        textStyle: const TextStyle(
            fontSize: AppDims.fsBody, fontWeight: FontWeight.w600),
        shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(AppDims.rMd)),
      ),
    ),
    // TextButton 兼作行内链接，不加边框；只统一字号字重与圆角
    textButtonTheme: TextButtonThemeData(
      style: TextButton.styleFrom(
        minimumSize: const Size(0, 38),
        textStyle: const TextStyle(
            fontSize: AppDims.fsBody, fontWeight: FontWeight.w600),
        shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(AppDims.rMd)),
      ),
    ),
    // 字体走系统默认（macOS/iOS=PingFang SC，与原型 --font 一致）；不强制 Noto。
    // Noto 仅 golden 测试加载（CI 无中文字体），见 test/support/golden_harness.dart。
    extensions: <ThemeExtension<dynamic>>[t],
  );
}