import { Card, Text, Group, Badge, Stack, Tooltip, ActionIcon } from "@mantine/core";
import GroupIcon from "@mui/icons-material/Group";
import InfoOutlinedIcon from "@mui/icons-material/InfoOutlined";
import { useTranslation } from "react-i18next";
import type { BillingStatus } from "@app/services/saasBillingService";
import { BILLING_CONFIG, getFormattedOveragePrice } from "@app/config/billing";
import { Z_INDEX_OVER_CONFIG_MODAL } from "@app/styles/zIndex";

interface TeamData {
  teamId: number;
  name: string;
  isPersonal: boolean;
  isLeader: boolean;
  seatsUsed: number;
}

interface ActiveSubscriptionCardProps {
  tier: BillingStatus["tier"];
  subscription: BillingStatus["subscription"];
  usage: BillingStatus["meterUsage"];
  isTrialing: boolean;
  price?: number;
  currency?: string;
  currentTeam?: TeamData | null;
  isTeamLeader?: boolean;
  isPersonalTeam?: boolean;
}

export function ActiveSubscriptionCard({
  tier,
  subscription,
  usage,
  isTrialing,
  price,
  currency,
  currentTeam,
  isTeamLeader = false,
  isPersonalTeam = true,
}: ActiveSubscriptionCardProps) {
  const { t } = useTranslation();

  // Format timestamp to readable date
  const formatDate = (timestamp: number): string => {
    return new Date(timestamp * 1000).toLocaleDateString(undefined, {
      year: "numeric",
      month: "long",
      day: "numeric",
    });
  };

  // Get tier display name
  const getTierName = (): string => {
    switch (tier) {
      case "free":
        return t("settings.planBilling.tier.free", "Free Plan");
      case "team":
        return t("settings.planBilling.tier.team", "Team Plan");
      case "enterprise":
        return t("settings.planBilling.tier.enterprise", "Enterprise Plan");
      default:
        return tier;
    }
  };

  // Get price display
  const getPriceDisplay = (): string => {
    if (tier === "free") {
      return "$0/month";
    }
    // Use actual price from Stripe if available
    if (price !== undefined && currency) {
      return `${currency}${price}/month`;
    }
    // Fallback to default pricing
    return "$10/month";
  };

  // Get description
  const getDescription = (): string => {
    if (tier === "free") {
      return t("settings.planBilling.tier.freeDescription", "50 credits per month");
    }
    return t(
      "settings.planBilling.tier.teamDescription",
      "500 credits/month included, automatic overage billing for uninterrupted service",
    );
  };

  // Format overage cost
  const formatOverageCost = (cents: number, credits: number): string => {
    return t("settings.planBilling.billing.overageCost", {
      amount: `$${(cents / 100).toFixed(2)}`,
      credits,
      defaultValue: `Current overage cost: $${(cents / 100).toFixed(2)} (${credits} credits)`,
    });
  };

  // Pro/Team card
  if (tier === "team" || tier === "enterprise") {
    return (
      <Card padding="lg" radius="md" withBorder>
        <Stack gap="sm">
          <Group justify="space-between" align="flex-start">
            {/* Left side: Name, badges, description */}
            <div style={{ flex: 1 }}>
              <Group gap="xs" mb="xs">
                <Text size="lg" fw={600}>
                  {!isPersonalTeam && isTeamLeader ? t("settings.planBilling.tier.team", "Team Plan") : getTierName()}
                </Text>
                {!isPersonalTeam && (
                  <Badge color="violet" variant="light" leftSection={<GroupIcon sx={{ fontSize: 12 }} />}>
                    {t("settings.planBilling.tier.teamBadge", "Team")}
                  </Badge>
                )}
                <Tooltip
                  label={
                    <div style={{ maxWidth: 300 }}>
                      <Text size="sm" mb="xs">
                        {t("settings.planBilling.tier.teamTooltipCredits", {
                          credits: BILLING_CONFIG.INCLUDED_CREDITS_PER_MONTH,
                          defaultValue: `Team plan includes ${BILLING_CONFIG.INCLUDED_CREDITS_PER_MONTH} credits/month.`,
                        })}
                      </Text>
                      <Text size="sm" mb="xs">
                        {t("settings.planBilling.tier.teamTooltipOverage", {
                          price: getFormattedOveragePrice(),
                          defaultValue: `Automatic overage billing at ${getFormattedOveragePrice()}/credit ensures uninterrupted service.`,
                        })}
                      </Text>
                      <Text size="sm">
                        {t(
                          "settings.planBilling.tier.teamTooltipFineprint",
                          "Only pay for what you use beyond included credits.",
                        )}
                      </Text>
                    </div>
                  }
                  multiline
                  withArrow
                  position="right"
                  zIndex={Z_INDEX_OVER_CONFIG_MODAL}
                >
                  <ActionIcon variant="subtle" color="gray" size="sm">
                    <InfoOutlinedIcon style={{ fontSize: 18 }} />
                  </ActionIcon>
                </Tooltip>
                {isTrialing && (
                  <Badge color="blue" variant="light">
                    {t("settings.planBilling.status.trial", "Trial")}
                  </Badge>
                )}
              </Group>
              {!isPersonalTeam && !isTeamLeader && (
                <Text size="sm" c="dimmed" mb="xs">
                  {t("settings.planBilling.team.managedByTeam", "Managed by team")}
                </Text>
              )}
              {!isPersonalTeam && isTeamLeader && currentTeam && (
                <Text size="sm" c="dimmed" mb="xs">
                  {t("settings.planBilling.team.memberCount", "{{count}} team members", { count: currentTeam.seatsUsed })}
                </Text>
              )}
              <Text size="sm" c="dimmed" mb="xs">
                {getDescription()}
              </Text>
              {/* Show overage cost if applicable */}
              {usage && usage.currentPeriodCredits > 0 && (
                <Text size="sm" c="orange" fw={500}>
                  {formatOverageCost(usage.estimatedCost, usage.currentPeriodCredits)}
                </Text>
              )}
            </div>

            {/* Right side: Price */}
            <div style={{ textAlign: "right" }}>
              {!isPersonalTeam && !isTeamLeader ? (
                <Text size="lg" c="dimmed">
                  {t("settings.planBilling.team.managedByTeam", "Managed by team")}
                </Text>
              ) : (
                <Text size="xl" fw={700}>
                  {getPriceDisplay()}
                </Text>
              )}
            </div>
          </Group>

          {/* Next billing date at bottom */}
          {subscription?.currentPeriodEnd && (
            <Group gap="xs" mt="xs">
              <Text size="sm" c="dimmed">
                {t("settings.planBilling.billing.nextBillingDate", "Next billing date:")}{" "}
                {formatDate(subscription.currentPeriodEnd)}
              </Text>
            </Group>
          )}
        </Stack>
      </Card>
    );
  }

  // Free plan card
  return (
    <Card padding="lg" radius="md" withBorder>
      <Group justify="space-between" align="center">
        <div>
          <Group gap="xs">
            <Text size="lg" fw={600}>
              {getTierName()}
            </Text>
          </Group>
          <Text size="sm" c="dimmed">
            {getDescription()}
          </Text>
        </div>
        <div style={{ textAlign: "right" }}>
          <Text size="xl" fw={700}>
            {getPriceDisplay()}
          </Text>
        </div>
      </Group>
    </Card>
  );
}