import React, { useState, useEffect } from "react";
import { View, ScrollView, Pressable, ActivityIndicator } from "react-native";
import { useSirouRouter } from "@sirou/react-native";
import { AppRoutes } from "@/lib/routes";
import { Text } from "@/components/ui/text";
import { Card, CardContent } from "@/components/ui/card";
import {
  FileText,
  ChevronRight,
  TrendingUp,
  TrendingDown,
  Clock,
} from "@/lib/icons";
import { ScreenWrapper } from "@/components/ScreenWrapper";
import { ShadowWrapper } from "@/components/ShadowWrapper";
import { StandardHeader } from "@/components/StandardHeader";
import { EmptyState } from "@/components/EmptyState";
import { api } from "@/lib/api";
import { Stack } from "expo-router";

export default function HistoryScreen() {
  const nav = useSirouRouter<AppRoutes>();
  const [loading, setLoading] = useState(true);
  const [stats, setStats] = useState({ totalRevenue: 0, pending: 0 });
  const [invoices, setInvoices] = useState<any[]>([]);

  useEffect(() => {
    fetchData();
  }, []);

  const fetchData = async () => {
    try {
      setLoading(true);
      const [statsRes, invoicesRes] = await Promise.all([
        api.invoices.stats(),
        api.invoices.getAll({ query: { limit: 100 } }),
      ]);
      setStats(statsRes);
      setInvoices(invoicesRes.data || []);
    } catch (error) {
      console.error("[HistoryScreen] Error fetching history:", error);
    } finally {
      setLoading(false);
    }
  };

  return (
    <ScreenWrapper className="bg-background">
      <Stack.Screen options={{ headerShown: false }} />
      <StandardHeader title="Activity History" showBack />

      <ScrollView
        className="flex-1"
        contentContainerStyle={{ padding: 16, paddingBottom: 150 }}
        showsVerticalScrollIndicator={false}
      >
        <View className="flex-row gap-4 mb-10">
          <ShadowWrapper className="flex-1">
            <View className="bg-card rounded-[10px] p-4 border border-border/5">
              <View className="h-10 w-10 bg-emerald-500/10 rounded-[8px] items-center justify-center mb-3">
                <TrendingUp color="#10b981" size={20} strokeWidth={2.5} />
              </View>
              <Text
                variant="muted"
                className="font-bold text-[10px] uppercase tracking-widest opacity-60"
              >
                Total Inflow
              </Text>
              <Text variant="h3" className="text-foreground font-black mt-1">
                ${stats.totalRevenue.toLocaleString()}
              </Text>
            </View>
          </ShadowWrapper>

          <ShadowWrapper className="flex-1">
            <View className="bg-card rounded-[10px] p-4 border border-border/5">
              <View className="h-10 w-10 bg-amber-500/10 rounded-[8px] items-center justify-center mb-3">
                <TrendingDown color="#f59e0b" size={20} strokeWidth={2.5} />
              </View>
              <Text
                variant="muted"
                className="font-bold text-[10px] uppercase tracking-widest opacity-60"
              >
                Pending
              </Text>
              <Text variant="h3" className="text-foreground font-black mt-1">
                ${stats.pending.toLocaleString()}
              </Text>
            </View>
          </ShadowWrapper>
        </View>

        <Text variant="h4" className="text-foreground mb-4 tracking-tight">
          All Activity
        </Text>

        {loading ? (
          <View className="py-20 items-center">
            <ActivityIndicator color="#ea580c" />
          </View>
        ) : (
          <View className="gap-2">
            {invoices.length > 0 ? (
              invoices.map((inv) => (
                <Pressable
                  key={inv.id}
                  onPress={() => nav.go("invoices/[id]", { id: inv.id })}
                >
                  <ShadowWrapper level="xs">
                    <Card className="rounded-[8px] bg-card overflow-hidden border-0">
                      <CardContent className="flex-row items-center py-4 px-3">
                        <View className="bg-secondary/40 h-10 w-10 rounded-[8px] items-center justify-center mr-3 border border-border/10">
                          <FileText
                            size={20}
                            color="#ea580c"
                            strokeWidth={2.5}
                          />
                        </View>
                        <View className="flex-1">
                          <Text
                            variant="p"
                            className="text-foreground font-bold"
                          >
                            {inv.customerName}
                          </Text>
                          <Text
                            variant="muted"
                            className="text-[11px] font-medium opacity-60"
                          >
                            {new Date(inv.issueDate).toLocaleDateString()} ·
                            Proforma
                          </Text>
                        </View>
                        <View className="items-end">
                          <Text
                            variant="p"
                            className="text-foreground font-black"
                          >
                            ${Number(inv.amount).toLocaleString()}
                          </Text>
                          <View
                            className={`mt-1 rounded-[5px] px-2.5 py-1 border border-border/20 ${
                              inv.status === "PAID"
                                ? "bg-emerald-500/10"
                                : inv.status === "PENDING"
                                  ? "bg-amber-500/10"
                                  : inv.status === "DRAFT"
                                    ? "bg-secondary/50"
                                    : "bg-red-500/10"
                            }`}
                          >
                            <Text
                              className={`text-[8px] font-black uppercase tracking-widest ${
                                inv.status === "PAID"
                                  ? "text-emerald-600"
                                  : inv.status === "PENDING"
                                    ? "text-amber-600"
                                    : inv.status === "DRAFT"
                                      ? "text-muted-foreground"
                                      : "text-red-600"
                              }`}
                            >
                              {inv.status}
                            </Text>
                          </View>
                        </View>
                        <ChevronRight
                          size={14}
                          color="#94a3b8"
                          className="ml-2"
                        />
                      </CardContent>
                    </Card>
                  </ShadowWrapper>
                </Pressable>
              ))
            ) : (
              <View className="py-6">
                <EmptyState
                  title="No activity yet"
                  description="Payments and invoices you create will show up here so you can track everything in one place."
                  hint="Create a proforma invoice to generate your first activity."
                  actionLabel="Create Proforma"
                  onActionPress={() => nav.go("proforma/create")}
                  previewLines={4}
                />
              </View>
            )}
          </View>
        )}
      </ScrollView>
    </ScreenWrapper>
  );
}