"use client";

import { useEffect, useState } from "react";
import { formatCoords } from "@/lib/display";
import { outlineButton, pixelLabel, sectionHeading } from "@/lib/styles";
import type { Place } from "@/lib/weather/types";
import { HeartMeter, SkyIcon } from "./PixelArt";
import { Slot } from "./Slot";

const WAYPOINTS: { place: Place; terrain: string }[] = [
  {
    place: { name: "New York", region: "New York", country: "US", lat: 40.7128, lon: -74.006 },
    terrain: "Atlantic harbor",
  },
  {
    place: { name: "Seattle", region: "Washington", country: "US", lat: 47.6062, lon: -122.3321 },
    terrain: "Puget Sound",
  },
  {
    place: { name: "Denver", region: "Colorado", country: "US", lat: 39.7392, lon: -104.9903 },
    terrain: "Front Range",
  },
  {
    place: { name: "Reykjavik", country: "IS", lat: 64.1466, lon: -21.9426 },
    terrain: "North Atlantic",
  },
  {
    place: { name: "London", country: "GB", lat: 51.5072, lon: -0.1276 },
    terrain: "Thames valley",
  },
  {
    place: { name: "Tokyo", country: "JP", lat: 35.6762, lon: 139.6503 },
    terrain: "Tokyo Bay",
  },
];

const HIGHLIGHTS = [
  {
    label: "Horizons",
    title: "Hourly & 14-day",
    detail: "Crosshair temperature & precip chart, exact hourly table, and daily range bars.",
  },
  {
    label: "Live sky map",
    title: "Animated radar",
    detail: "High-detail US NEXRAD & global RainViewer loops, plus 5 OpenWeather tile layers.",
  },
  {
    label: "Field readings",
    title: "Comfort & AQI",
    detail: "Five-heart comfort gauge, US AQI & PM2.5, UV stamina bars, NWS alerts, and moon phase.",
  },
];

/**
 * Homepage landing view shown before a destination is chosen.
 * Introduces the station aesthetic and lets visitors jump straight into a waypoint.
 */
export function HomeLanding({
  onSelectPlace,
  onFocusSearch,
  activeProviderLabel,
}: {
  onSelectPlace: (place: Place) => void;
  onFocusSearch: () => void;
  activeProviderLabel?: string;
}) {
  const [isDaytime, setIsDaytime] = useState(true);

  useEffect(() => {
    const hour = new Date().getHours();
    setIsDaytime(hour >= 6 && hour < 19);
  }, []);

  return (
    <div className="flex flex-col gap-6">
      {/* Hero welcome frame */}
      <Slot
        as="section"
        className="[--cut:22px]"
        innerClassName="grid items-center gap-6 p-6 sm:grid-cols-[auto_1fr] sm:gap-8 sm:px-8 sm:py-8"
      >
        <div className="flex flex-col items-center gap-3 justify-self-center sm:justify-self-start">
          <div className="relative grid aspect-square w-[148px] place-items-center border border-gold-dim bg-black bg-radial-[circle_at_50%_45%] from-gold-bright/14 to-transparent to-70% sm:w-[168px]">
            <SkyIcon
              condition="clear"
              isDay={isDaytime}
              size={112}
              className="h-auto w-[96px] animate-float motion-reduce:animate-none sm:w-[112px]"
            />
            <div className="absolute right-2 bottom-2 flex gap-1.5 border border-gold-dim/70 bg-panel/90 px-1.5 py-1">
              <SkyIcon condition="clouds" size={16} />
              <SkyIcon condition="rain" size={16} />
              <SkyIcon condition="storm" size={16} />
            </div>
          </div>

          <div className="flex items-center gap-2">
            <HeartMeter hearts={4.5} />
          </div>
        </div>

        <div className="flex flex-col gap-3">
          <p className="font-pixel text-[0.7rem] tracking-[0.06em] text-teal">
            {activeProviderLabel ? `${activeProviderLabel} active · Ready` : "Weather station ready"}
          </p>
          <h2 className="font-display text-2xl leading-tight font-medium tracking-[0.02em] text-gold-bright sm:text-3xl">
            Read the skies before you set out.
          </h2>
          <p className="max-w-[54ch] text-sm leading-relaxed text-stone sm:text-base">
            Search any town or city above, share your current coordinates, or choose a waypoint below to inspect live conditions, hourly horizons, and animated radar.
          </p>
          <div className="mt-1 flex flex-wrap items-center gap-3">
            <button type="button" onClick={onFocusSearch} className={outlineButton}>
              Search a destination
            </button>
            <span className={pixelLabel}>Or pick a waypoint ↓</span>
          </div>
        </div>
      </Slot>

      {/* Quick-start waypoints */}
      <section aria-labelledby="waypoints-heading" className="flex flex-col gap-3">
        <div className="flex items-center gap-3">
          <h2 id="waypoints-heading" className={sectionHeading}>
            Suggested waypoints
          </h2>
          <span className="h-px flex-1 bg-linear-to-r from-gold-dim/70 to-transparent" aria-hidden="true" />
        </div>

        <div className="grid grid-cols-1 gap-2.5 sm:grid-cols-3">
          {WAYPOINTS.map(({ place, terrain }) => (
            <Slot key={place.name} className="[--cut:10px] transition-transform duration-150 hover:-translate-y-0.5" innerClassName="p-0">
              <button
                type="button"
                onClick={() => onSelectPlace(place)}
                className="group flex h-full w-full cursor-pointer flex-col justify-between gap-2 p-3.5 text-left transition-colors hover:bg-gold/8 focus-visible:outline-offset-[-2px]"
              >
                <div className="flex items-start justify-between gap-2">
                  <div>
                    <p className="font-display text-base font-medium text-ink transition-colors group-hover:text-gold-bright">
                      {place.name}
                    </p>
                    <p className="text-xs text-stone">
                      {place.region ? `${place.region}, ${place.country}` : place.country} · {terrain}
                    </p>
                  </div>
                  <span
                    aria-hidden="true"
                    className="font-pixel text-xs text-gold-dim transition-transform group-hover:translate-x-0.5 group-hover:text-gold-bright"
                  >
                    ›
                  </span>
                </div>

                <p className="font-pixel text-[0.65rem] text-teal/85 tabular-nums">
                  {formatCoords(place.lat, place.lon, 1)}
                </p>
              </button>
            </Slot>
          ))}
        </div>
      </section>

      {/* Station overview */}
      <section aria-label="What Wayfarer includes" className="grid grid-cols-1 gap-2.5 sm:grid-cols-3">
        {HIGHLIGHTS.map((item) => (
          <Slot key={item.title} className="[--cut:10px]" innerClassName="flex flex-col gap-1 p-3.5">
            <p className={pixelLabel}>{item.label}</p>
            <p className="font-display text-base font-medium text-gold-bright">{item.title}</p>
            <p className="text-xs leading-relaxed text-stone">{item.detail}</p>
          </Slot>
        ))}
      </section>
    </div>
  );
}