import React from 'react';
import { useNavigate } from 'react-router-dom';
import { useTranslation } from 'react-i18next';
import { Card } from '@tamagui/card';
import { YGroup } from '@tamagui/group';
import { ListItem } from '@tamagui/list-item';
import { Progress } from '@tamagui/progress';
import { YStack, XStack } from '@tamagui/stacks';
import { SizableText as Text } from '@tamagui/text';
import { Pressable } from '@tamagui/react-native-web-lite';
import { CheckCircle2, Circle, ChevronDown, ChevronUp } from 'lucide-react';
import { Separator } from 'tamagui';
import { useAdminTheme } from '../theme';
import { ReadinessStep } from '../hooks/useEventReadiness';
import { adminPath } from '../../constants';
import { PillBadge } from './Primitives';

export function SetupChecklist({
  steps,
  title,
  variant = 'card',
}: {
  steps: ReadinessStep[];
  title: string;
  variant?: 'card' | 'inline';
}) {
  const theme = useAdminTheme();
  const { t } = useTranslation('dashboard');
  const navigate = useNavigate();
  const isAllComplete = steps.every(s => s.isComplete);
  const [collapsed, setCollapsed] = React.useState(true);
  const isInline = variant === 'inline';

  const completedCount = steps.filter(s => s.isComplete).length;
  const totalSteps = steps.length;
  const progressValue = totalSteps > 0 ? Math.round((completedCount / totalSteps) * 100) : 0;

  const content = (
    <YStack>
      <Pressable onPress={() => setCollapsed(!collapsed)}>
        <YStack padding="$3" paddingVertical="$2.5" space="$2">
          <XStack alignItems="center" justifyContent="space-between">
            <XStack alignItems="center" space="$2">
              <Text fontSize="$xs" fontWeight="700" color={theme.muted} textTransform="uppercase" letterSpacing={1}>
                {title}
              </Text>
              {isAllComplete ? (
                <CheckCircle2 size={14} color={theme.successText} />
              ) : (
                <PillBadge tone="warning">{t('readiness.pending', 'Noch offen')}</PillBadge>
              )}
            </XStack>

            <XStack alignItems="center" space="$2">
              <Text fontSize="$xs" color={theme.muted} fontWeight="600">
                {completedCount}/{steps.length}
              </Text>
              {collapsed ? <ChevronDown size={16} color={theme.muted} /> : <ChevronUp size={16} color={theme.muted} />}
            </XStack>
          </XStack>

          <Progress
            value={progressValue}
            size="$1"
            backgroundColor={theme.surfaceMuted}
            height={6}
          >
            <Progress.Indicator
              backgroundColor={isAllComplete ? theme.successText : theme.primary}
            />
          </Progress>
        </YStack>
      </Pressable>

      {!collapsed && (
        <YStack>
          <Separator backgroundColor={theme.border} opacity={0.6} />
          <YGroup {...({ borderRadius: "$4", borderWidth: 1, borderColor: theme.border, overflow: "hidden" } as any)}>
            {steps.map((step, index) => {
              const isNext = !step.isComplete && steps.slice(0, index).every(s => s.isComplete);

              return (
                <YGroup.Item key={step.id}>
                  <ListItem
                    hoverTheme
                    pressTheme
                    paddingVertical="$2"
                    paddingHorizontal="$3"
                    backgroundColor={isNext ? theme.surfaceMuted : 'transparent'}
                    onPress={() => navigate(adminPath(step.targetPath))}
                    title={
                      <XStack alignItems="center" space="$2.5">
                        {step.isComplete ? (
                          <CheckCircle2 size={18} color={theme.successText} />
                        ) : isNext ? (
                          <Circle size={18} color={theme.primary} strokeWidth={2.5} />
                        ) : (
                          <Circle size={18} color={theme.border} />
                        )}
                        <Text
                          fontSize="$sm"
                          fontWeight={isNext ? '700' : '500'}
                          color={step.isComplete ? theme.muted : theme.textStrong}
                          textDecorationLine={step.isComplete ? 'line-through' : 'none'}
                        >
                          {step.label}
                        </Text>
                      </XStack>
                    }
                    subTitle={
                      step.description && !step.isComplete ? (
                        <Text fontSize="$xs" color={theme.muted}>
                          {step.description}
                        </Text>
                      ) : undefined
                    }
                    iconAfter={isNext ? <PillBadge tone="success">Start</PillBadge> : undefined}
                  />
                </YGroup.Item>
              );
            })}
          </YGroup>
        </YStack>
      )}
    </YStack>
  );

  if (isInline) {
    return content;
  }

  return (
    <Card
      backgroundColor={theme.surface}
      borderRadius={20}
      borderWidth={1}
      borderColor={theme.border}
      padding="$0"
      overflow="hidden"
      shadowColor={theme.shadow}
      shadowOpacity={0.16}
      shadowRadius={16}
      shadowOffset={{ width: 0, height: 10 }}
    >
      {content}
    </Card>
  );
}
