import { Ionicons } from "@expo/vector-icons";
import { router } from "expo-router";
import { useTranslation } from "react-i18next";
import { Pressable, ScrollView, View } from "react-native";
import { Badge } from "@/components/ui/Badge";
import { Button } from "@/components/ui/Button";
import { Card } from "@/components/ui/Card";
import { AppHeader } from "@/components/ui/Header";
import { Screen } from "@/components/ui/Screen";
import { Text } from "@/components/ui/Text";
import { routes } from "@/lib/routes";
import { useProfileModeStore } from "@/lib/stores/profileModeStore";
import { colors, gutter } from "@/lib/theme";
import { formatETB } from "@/lib/utils";

export default function ProfileSwitchScreen() {
  const { t } = useTranslation();
  const mode = useProfileModeStore((s) => s.mode);
  const setMode = useProfileModeStore((s) => s.setMode);
  const memberships = useProfileModeStore((s) => s.memberships);
  const setActiveOrg = useProfileModeStore((s) => s.setActiveOrg);
  const activeOrgId = useProfileModeStore((s) => s.activeOrgId);

  return (
    <Screen>
      <AppHeader
        title={t("common.switchProfile")}
        subtitle="Personal shopping or organisation benefits"
      />
      <ScrollView
        contentContainerStyle={{
          paddingHorizontal: gutter,
          paddingBottom: 32,
          gap: 12,
        }}
      >
        <Pressable
          onPress={() => {
            setMode("personal");
            setActiveOrg(null);
          }}
          style={cardStyle(mode === "personal")}
        >
          <View style={{ flexDirection: "row", alignItems: "center", gap: 12 }}>
            <View
              style={{
                width: 44,
                height: 44,
                borderRadius: 14,
                backgroundColor: colors.brandSoft,
                alignItems: "center",
                justifyContent: "center",
              }}
            >
              <Ionicons name="person" size={20} color={colors.brandText} />
            </View>
            <View style={{ flex: 1 }}>
              <Text variant="h3">{t("common.personal")}</Text>
              <Text variant="caption" color={colors.muted} style={{ marginTop: 2 }}>
                Retail shopping, loyalty points, family
              </Text>
            </View>
            {mode === "personal" ? <Badge label="Active" tone="brand" /> : null}
          </View>
        </Pressable>

        {memberships.map((m) => {
          const active = mode === "corporate" && activeOrgId === m.orgId;
          return (
            <Pressable
              key={m.orgId}
              onPress={() => setActiveOrg(m.orgId)}
              style={cardStyle(active)}
            >
              <View style={{ flexDirection: "row", alignItems: "center", gap: 12 }}>
                <View
                  style={{
                    width: 44,
                    height: 44,
                    borderRadius: 14,
                    backgroundColor: colors.brandSoft,
                    alignItems: "center",
                    justifyContent: "center",
                  }}
                >
                  <Ionicons name="business" size={20} color={colors.brandText} />
                </View>
                <View style={{ flex: 1 }}>
                  <Text variant="h3">{m.orgName}</Text>
                  <Text variant="caption" color={colors.muted} style={{ marginTop: 2 }}>
                    {m.planName}
                  </Text>
                  <Text variant="label" color={colors.brandText} style={{ marginTop: 6 }}>
                    {formatETB(m.remainingAllowance)} allowance left
                  </Text>
                </View>
                {active ? <Badge label="Active" tone="brand" /> : null}
              </View>
            </Pressable>
          );
        })}

        {!memberships.length ? (
          <Card elevated={false}>
            <Text variant="body" color={colors.muted}>
              No organisations yet. Join with a demo code from your HR team.
            </Text>
            <Button
              title={t("common.joinOrg")}
              onPress={() => router.push(routes.profileJoin)}
              style={{ marginTop: 12 }}
            />
          </Card>
        ) : (
            <Button
              title={t("common.joinOrg")}
              variant="outline"
              onPress={() => router.push(routes.profileJoin)}
            />
        )}
      </ScrollView>
    </Screen>
  );
}

function cardStyle(selected: boolean) {
  return {
    backgroundColor: colors.surface,
    borderRadius: 20,
    padding: 16,
    borderWidth: selected ? 2 : 1,
    borderColor: selected ? colors.brand : colors.line,
  };
}