import React from "react";

import { StyleSheet, ActivityIndicator } from "react-native";

import { Text } from "@/components/ui/Text";

import { Card } from "@/components/ui/Cards";

import { useInsight } from "@/hooks/useInsights.queries";

import { Spacing, Typography, Colors } from "@/constants/theme";

import { InsightCard, MetricAccent } from "./InsightCard";

export const EnergySleepWidget: React.FC = () => {

  const { data: insight, isLoading } = useInsight("ENERGY_SLEEP_CORRELATION");

  if (isLoading) {

    return (

      <Card style={styles.container}>

        <ActivityIndicator />

      </Card>

    );

  }

  if (!insight) {

    return (

      <InsightCard

        category="Energia"

        body={

          <Text style={styles.empty}>

            Registre sono e humor para ver correlações.

          </Text>

        }

        accent="neutral"

        metric="—"

      />

    );

  }

  const meta = insight.metadata as { correlationScore: number; sampleSize: number };

  const { label, accent } = resolveCorrelation(meta.correlationScore, meta.sampleSize);

  return (

    <InsightCard

      category="Energia"

      body={insight.body}

      metric={label}

      accent={accent}

      footnote="Correlação de Pearson entre horas de sono e energia no dia seguinte."

    />

  );

};

function resolveCorrelation(

  score: number,

  sampleSize: number,

): { label: string; accent: MetricAccent } {

  const lowData = sampleSize < 5;

  const suffix = lowData ? "*" : "";

  if (score > 0.6)

    return { label: `Forte${suffix}`, accent: "green" };

  if (score > 0.3)

    return { label: `Moderada${suffix}`, accent: "green" };

  if (score >= -0.3)

    return { label: `Nenhuma${suffix}`, accent: "neutral" };

  return { label: `—`, accent: "purple" };

}

const styles = StyleSheet.create({

  container: {

    flex: 1,

    padding: Spacing.cardGap,

  },

  label: {

    ...Typography.labelSm,

    opacity: 0.6,

  },

  empty: {

    color: Colors.light.lightSlateGray,

    marginTop: 4,

  },

});