import {
  ScrollView,
  View,
  Text,
  TouchableOpacity,
  RefreshControl,
} from "react-native";
import { SafeAreaView } from "react-native-safe-area-context";
import { router, useFocusEffect } from "expo-router";
import { useCallback } from "react";
import { MaterialIcons } from "@expo/vector-icons";
import { useCodexUsage } from "@/hooks/useCodexUsage";
import { useClaudeUsage } from "@/hooks/useClaudeUsage";
import { ServiceStatusCard } from "@/components/ServiceStatusCard";
import { windowLabel } from "@/lib/timeUtils";

export default function DashboardTab() {
  const codex = useCodexUsage();
  const claude = useClaudeUsage();

  useFocusEffect(
    useCallback(() => {
      codex.reload();
      claude.reload();
    }, [])
  );

  const isRefreshing =
    codex.status === "loading" || claude.status === "loading";

  const handleRefresh = () => {
    codex.refresh();
    claude.refresh();
  };

  const codexRows =
    codex.usage
      ? [
          {
            label: `Primary (${windowLabel(codex.usage.rate_limit.primary_window.limit_window_seconds)})`,
            percent: codex.usage.rate_limit.primary_window.used_percent,
            resetAtSeconds: codex.usage.rate_limit.primary_window.reset_at,
          },
          {
            label: `Secondary (${windowLabel(codex.usage.rate_limit.secondary_window.limit_window_seconds)})`,
            percent: codex.usage.rate_limit.secondary_window.used_percent,
            resetAtSeconds: codex.usage.rate_limit.secondary_window.reset_at,
          },
        ]
      : undefined;

  const claudeRows =
    claude.usage
      ? [
          {
            label: "5-hour window",
            percent: claude.usage.five_hour.utilization,
            resetAtISO: claude.usage.five_hour.resets_at,
          },
          {
            label: "7-day window",
            percent: claude.usage.seven_day.utilization,
            resetAtISO: claude.usage.seven_day.resets_at,
          },
        ]
      : undefined;

  return (
    <SafeAreaView
      className="flex-1 bg-neutral-50 dark:bg-neutral-950"
      edges={["top", "bottom"]}
    >
      <ScrollView
        className="flex-1"
        contentContainerStyle={{ paddingHorizontal: 16, paddingBottom: 32 }}
        refreshControl={
          <RefreshControl
            refreshing={isRefreshing}
            onRefresh={handleRefresh}
            tintColor="#10a37f"
          />
        }
      >
        {/* Header */}
        <View className="flex-row items-center justify-between py-5">
          <View>
            <Text className="text-2xl font-bold text-neutral-900 dark:text-white tracking-tight">
              Codexbar
            </Text>
            <Text className="text-xs text-neutral-400 mt-0.5">
              AI usage monitor
            </Text>
          </View>
          <TouchableOpacity
            onPress={handleRefresh}
            className="w-9 h-9 rounded-xl bg-neutral-100 dark:bg-neutral-800 items-center justify-center"
          >
            <MaterialIcons name="refresh" size={18} color="#10a37f" />
          </TouchableOpacity>
        </View>

        {/* Codex card */}
        <ServiceStatusCard
          title="Codex CLI"
          icon="auto-awesome"
          accentColor="#10a37f"
          status={!codex.auth ? "idle" : codex.status}
          badge={codex.usage?.plan_type}
          rows={codexRows}
          unconfiguredLabel="Import auth.json to see your Codex rate limits."
          onConfigurePress={() => router.navigate("/(tabs)/codex")}
          footer={
            codex.usage && !codex.usage.credits.unlimited && codex.usage.credits.has_credits
              ? (
                <View className="flex-row items-center gap-x-2">
                  <MaterialIcons name="toll" size={14} color="#a3a3a3" />
                  <Text className="text-xs text-neutral-500 dark:text-neutral-400">
                    ${Number(codex.usage.credits.balance).toFixed(2)} credits remaining
                  </Text>
                </View>
              )
              : codex.usage?.credits.unlimited
              ? (
                <View className="flex-row items-center gap-x-2">
                  <MaterialIcons name="all-inclusive" size={14} color="#10a37f" />
                  <Text className="text-xs text-green-600 dark:text-green-400">
                    Unlimited credits
                  </Text>
                </View>
              )
              : null
          }
        />

        {/* Claude card */}
        <ServiceStatusCard
          title="Claude.ai"
          icon="psychology"
          accentColor="#d97706"
          status={!claude.sessionKey ? "idle" : claude.status}
          rows={claudeRows}
          unconfiguredLabel="Add your session key to see Claude usage windows."
          onConfigurePress={() => router.navigate("/(tabs)/claude")}
        />
      </ScrollView>
    </SafeAreaView>
  );
}