<template>
  <FlexRow 
    :innerClass="['nana-alert', `nana-alert-${type}`]"
    :innerStyle="{
      ...themeStyles.container.value,
      backgroundColor: themeContext.resolveThemeColor(backgroundColor|| selectStyleType(
        type, 'default', {
          default: '',
          primary: 'background.primary',
          success: 'background.success',
          warning: 'background.warning',
          danger: 'background.danger',
          error: 'background.danger',
          info: 'background.info',
        }
      )),
      borderStyle: 'solid',
      borderColor: themeContext.resolveThemeColor(borderColor || selectStyleType(
        type, 'default', {
          default: 'border.default',
          primary: 'mask.primary',
          success: 'mask.success',
          warning: 'mask.warning',
          danger: 'mask.danger',
          error: 'mask.danger',
          info: 'mask.info',
        }
      )),
      borderRadius: themeContext.resolveThemeSize('AlertBorderRadius', 16),
    }"
    @click="emit('click')"
  >
    <!-- 图标 -->
    <slot name="icon">
      <Icon
        :icon="icon ?? iconTypeMap[type]"
        :color="color"
        :innerStyle="{
          ...themeStyles.icon.value,
          marginRight: hasTitle || hasContent ? themeContext.resolveThemeSize('AlertIconMarginRight', 12) : 0,
        }"
      />
    </slot>
    
    <!-- 内容区域 -->
    <FlexCol 
      :innerClass="['nana-alert-content']"
      :flexGrow="1"
      :flexShrink="1"
    >
      <!-- 标题 -->
      <slot name="message">
        <Text 
          v-if="message"
          :text="message"
          :fontSize="themeContext.resolveThemeSize('AlertTitleFontSize', 'fontSize.medium')"
          :fontWeight="themeContext.getVar('AlertTitleFontWeight', 'bold')"
          :color="color"
          :innerStyle="themeStyles.message.value"
        />
      </slot>
      <!-- 内容 -->
      <slot name="description">
        <Text 
          v-if="description"
          :text="description"
          :fontSize="themeContext.resolveThemeSize('AlertMessageFontSize', 'fontSize.small')"
          :color="color"
          :lines="lines"
          :innerStyle="{
            ...themeStyles.description.value,
            marginTop: hasTitle ? themeContext.resolveThemeSize('AlertMessageMarginTop', 8) : 0,
          }"
        />
      </slot>
      
      <!-- 自定义内容 -->
      <slot />
    </FlexCol>
    
    <!-- 关闭按钮 -->
    <slot name="close">
      <IconButton
        v-if="closeable"
        :icon="closeIcon"
        :color="closeIconColor"
        :size="themeContext.resolveThemeSize('AlertCloseButtonSize', 42)"
        :innerStyle="{
          ...themeStyles.closeButton.value,
          marginLeft: themeContext.resolveThemeSize('AlertCloseButtonMarginLeft', 12),
        }"
        @click.stop="handleClose"
      />
    </slot>
  </FlexRow>
</template>

<script setup lang="ts">
import { computed } from 'vue';
import { useTheme, type TextStyle, type ViewStyle } from '../theme/ThemeDefine';
import { DynamicSize, DynamicColor, selectStyleType, DynamicVar } from '../theme/ThemeTools';
import Text from '../basic/Text.vue';
import Icon from '../basic/Icon.vue';
import IconButton from '../basic/IconButton.vue';
import FlexRow from '../layout/FlexRow.vue';
import FlexCol from '../layout/FlexCol.vue';

export type AlertType = 'primary' | 'success' | 'warning' | 'danger' | 'error' | 'info' | 'default';
export interface AlertProps {
  /**
   * 提示类型，可选值为 primary, success, warning, danger, error, info, default
   * @default 'default'
   */
  type?: AlertType;
  /**
   * 提示标题
   */
  message?: string;
  /**
   * 提示内容
   */
  description?: string;
  /**
   * 自定义图标
   */
  icon?: string;
  /**
   * 文字和图标的颜色
   */
  color?: string;
  /**
   * 背景颜色
   */
  backgroundColor?: string;
  /**
   * 边框颜色
   */
  borderColor?: string;
  /**
   * 是否显示关闭按钮
   * @default false
   */
  closeable?: boolean;
  /**
   * 关闭图标
   * @default 'close'
   */
  closeIcon?: string;
  /**
   * 关闭图标颜色
   */
  closeIconColor?: string;
  /**
   * 内容最多显示的行数，0表示不限制
   * @default 0
   */
  lines?: number;
}

const emit = defineEmits(['close', 'click']);
const props = withDefaults(defineProps<AlertProps>(), {
  type: 'default',
  closeable: false,
  closeIcon: 'close',
  lines: 0,
});

const themeContext = useTheme();
const iconTypeMap = {
  primary: 'prompt',
  success: 'success',
  warning: 'warning',
  danger: 'error',
  error: 'delete-filling',
  info: 'prompt',
  default: '',
} as const;

// 判断是否有标题和内容
const hasTitle = computed(() => !!props.message);
const hasContent = computed(() => !!props.description);
const color = computed(() => {
  if (props.color) 
    return themeContext.resolveThemeColor(props.color);
  return selectStyleType(props.type, 'default', {
    default: 'text.content',
    primary: 'text.primary',
    success: 'text.success',
    warning: 'text.warning',
    danger: 'text.danger',
    error: 'text.danger',
    info: 'text.info',
  });
});
const closeIconColor = computed(() => {
  if (props.closeIconColor)
    return themeContext.resolveThemeColor(props.closeIconColor);
  return themeContext.resolveThemeColor('text.second');
});

// 处理关闭事件
const handleClose = () => {
  emit('close');
};

// 定义主题样式
const themeStyles = themeContext.useThemeStyles({
  container: {
    position: 'relative',
    display: 'flex',
    flexDirection: 'row',
    alignItems: 'center',
    padding: DynamicSize('AlertPadding', 16),
    borderWidth: DynamicSize('AlertBorderWidth', '1px'),
    borderStyle: DynamicVar('AlertBorderStyle', 'solid'),
  } as ViewStyle,
  icon: {
    fontSize: DynamicSize('AlertIconSize', 20),
    flexShrink: 0,
    marginTop: DynamicSize('AlertIconMarginTop', 2),
  } as ViewStyle,
  message: {
    margin: 0,
    padding: 0,
    flexShrink: 0,
  } as TextStyle,
  description: {
    margin: 0,
    padding: 0,
    flexShrink: 1,
  } as TextStyle,
  closeButton: {} as ViewStyle,
});
</script>

<style lang="scss">
.nana-alert {
  transition: all 0.3s ease;
  box-sizing: border-box;
  
  &-content {
    flex: 1;
    min-width: 0;
  }
}
</style>