import type { CardAct, CardSection } from "@rakazo/contracts";
import { cardTimerRemaining, formatCardClock } from "@rakazo/core";
import { useKeepAwake } from "expo-keep-awake";
import { useEffect, useState } from "react";
import { Modal, Pressable, SafeAreaView, StyleSheet, Text, View } from "react-native";
import { mobileTokens } from "../lib/appearance";
import { useI18n } from "../lib/i18n";
import { NativeSymbol } from "./native-symbol";

type Steps = Extract<CardSection, { type: "steps" }>;

/** The current time, ticking every second while `active`. */
export function useNow(active: boolean): number {
  const [now, setNow] = useState(() => Date.now());
  useEffect(() => {
    if (!active) return;
    setNow(Date.now());
    const timer = setInterval(() => setNow(Date.now()), 1000);
    return () => clearInterval(timer);
  }, [active]);
  return now;
}

/**
 * A card's steps one at a time in full screen, large enough to read from the stove, with the
 * screen kept on. The step and any timer live on the card, so the web and a reload agree.
 */
export function CookingMode({
  title,
  steps,
  now,
  busy,
  onAct,
  onClose,
}: {
  title: string;
  steps: Steps;
  now: number;
  busy: boolean;
  onAct: (act: CardAct) => Promise<void>;
  onClose: () => void;
}) {
  useKeepAwake();
  const tokens = mobileTokens();
  const { t } = useI18n();
  const index = Math.min(steps.current ?? 0, steps.steps.length - 1);
  const step = steps.steps[index];
  const last = index === steps.steps.length - 1;
  const remaining = cardTimerRemaining(step?.timerEndsAt, now);
  const running = remaining !== null && remaining > 0;
  const go = (next: number) => void onAct({ type: "step", sectionId: steps.id, index: next });

  return (
    <Modal animationType="slide" presentationStyle="fullScreen" onRequestClose={onClose}>
      <SafeAreaView style={[styles.screen, { backgroundColor: tokens.background }]}>
        <View style={styles.top}>
          <Text numberOfLines={1} style={[styles.title, { color: tokens.mutedForeground }]}>
            {title}
          </Text>
          <Pressable
            accessibilityRole="button"
            accessibilityLabel={t("Close")}
            onPress={onClose}
            hitSlop={12}
          >
            <NativeSymbol ios="xmark" android="close" size={20} />
          </Pressable>
        </View>
        <View style={styles.middle}>
          <Text style={[styles.counter, { color: tokens.mutedForeground }]}>
            {t("Step {position} of {total}", {
              position: index + 1,
              total: steps.steps.length,
            })}
          </Text>
          <Text style={[styles.step, { color: tokens.foreground }]}>{step?.text}</Text>
          {step?.timerSeconds ? (
            <Pressable
              accessibilityRole="button"
              accessibilityLabel={running ? t("Stop timer") : t("Start timer")}
              disabled={busy}
              onPress={() =>
                void onAct({
                  type: "timer",
                  sectionId: steps.id,
                  stepId: step.id,
                  running: !running,
                })
              }
              style={[
                styles.timer,
                {
                  borderColor: running ? tokens.primary : tokens.border,
                  backgroundColor: running ? tokens.primary : "transparent",
                },
              ]}
            >
              <NativeSymbol
                ios={running ? "pause.fill" : "play.fill"}
                android={running ? "pause" : "play"}
                size={20}
                color={running ? tokens.primaryForeground : tokens.foreground}
              />
              <Text
                style={[
                  styles.clock,
                  { color: running ? tokens.primaryForeground : tokens.foreground },
                ]}
              >
                {formatCardClock(remaining ?? step.timerSeconds)}
              </Text>
            </Pressable>
          ) : null}
        </View>
        <View style={styles.bottom}>
          <Pressable
            accessibilityRole="button"
            disabled={busy || index === 0}
            onPress={() => go(index - 1)}
            style={[styles.nav, { borderColor: tokens.border, opacity: index === 0 ? 0.4 : 1 }]}
          >
            <Text style={[styles.navText, { color: tokens.foreground }]}>{t("Back")}</Text>
          </Pressable>
          <Pressable
            accessibilityRole="button"
            disabled={busy && !last}
            onPress={() => (last ? onClose() : go(index + 1))}
            style={[styles.nav, { borderColor: tokens.primary, backgroundColor: tokens.primary }]}
          >
            <Text style={[styles.navText, { color: tokens.primaryForeground }]}>
              {last ? t("Done") : t("Next")}
            </Text>
          </Pressable>
        </View>
      </SafeAreaView>
    </Modal>
  );
}

const styles = StyleSheet.create({
  screen: { flex: 1, paddingHorizontal: 24 },
  top: {
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "space-between",
    gap: 12,
    paddingTop: 16,
  },
  title: { flex: 1, fontSize: 15, fontWeight: "600" },
  middle: { flex: 1, justifyContent: "center", gap: 28 },
  counter: { fontSize: 15 },
  step: { fontSize: 30, lineHeight: 40, fontWeight: "600" },
  timer: {
    alignSelf: "flex-start",
    flexDirection: "row",
    alignItems: "center",
    gap: 10,
    borderWidth: 1,
    borderRadius: 16,
    paddingHorizontal: 18,
    paddingVertical: 12,
  },
  clock: { fontSize: 26, fontWeight: "600", fontVariant: ["tabular-nums"] },
  bottom: { flexDirection: "row", justifyContent: "space-between", gap: 12, paddingBottom: 16 },
  nav: {
    flex: 1,
    alignItems: "center",
    borderWidth: 1,
    borderRadius: 14,
    paddingVertical: 14,
  },
  navText: { fontSize: 16, fontWeight: "600" },
});