import type { Race } from "../api";

export type RaceVisualVariant = "short" | "half" | "marathon" | "trail" | "night";
export type RaceVisualFit = "cover" | "contain";

interface RaceVisual {
  variant: RaceVisualVariant;
  imageSrc: string;
  fallbackSrc: string;
  imageFit: RaceVisualFit;
  label: string;
}

interface OfficialRaceVisual {
  keywords: string[];
  imageSrc: string;
  imageFit?: RaceVisualFit;
  label: string;
}

const FALLBACK_VISUALS: Record<RaceVisualVariant, RaceVisual> = {
  short: {
    variant: "short",
    imageSrc: "/images/race-short.jpg",
    fallbackSrc: "/images/race-short.jpg",
    imageFit: "cover",
    label: "Городской темп",
  },
  half: {
    variant: "half",
    imageSrc: "/images/race-half.jpg",
    fallbackSrc: "/images/race-half.jpg",
    imageFit: "cover",
    label: "Полумарафон",
  },
  marathon: {
    variant: "marathon",
    imageSrc: "/images/race-marathon.jpg",
    fallbackSrc: "/images/race-marathon.jpg",
    imageFit: "cover",
    label: "Марафон",
  },
  trail: {
    variant: "trail",
    imageSrc: "/images/race-trail.jpg",
    fallbackSrc: "/images/race-trail.jpg",
    imageFit: "cover",
    label: "Трейл",
  },
  night: {
    variant: "night",
    imageSrc: "/images/race-night.jpg",
    fallbackSrc: "/images/race-night.jpg",
    imageFit: "cover",
    label: "Ночной старт",
  },
};

const OFFICIAL_VISUALS: OfficialRaceVisual[] = [
  {
    keywords: ["забег апрель"],
    imageSrc: "https://aprilrun5km.runc.run/uploads/page_card_photos/AprilRun_photo_1.jpg",
    label: "Забег Апрель",
  },
  {
    keywords: ["быстрый пес"],
    imageSrc: "https://fastdogxc.runc.run/uploads/page_card_photos/Dog_spring_2026-5.jpg",
    label: "Кросс",
  },
  {
    keywords: ["лисья гора"],
    imageSrc: "https://foxhillxc.runc.run/uploads/page_card_photos/Fox_Spring_2026-0.jpg",
    label: "Кросс",
  },
  {
    keywords: ["казанский марафон"],
    imageSrc: "https://static.tildacdn.com/tild3961-6436-4462-b738-356665613039/Frame_2131327895.png",
    imageFit: "contain",
    label: "Казанский марафон",
  },
  {
    keywords: ["мышкинский полумарафон", "по шести холмам"],
    imageSrc: "https://static.tildacdn.com/tild6133-6137-4865-b166-623532313531/photo.jpg",
    label: "Золотое кольцо",
  },
  {
    keywords: ["забег.рф", "забег рф"],
    imageSrc: "https://xn--80acghh.xn--p1ai/zabeg.jpg",
    label: "ЗаБег.РФ",
  },
  {
    keywords: ["переславский марафон", "александровские версты"],
    imageSrc: "https://static.tildacdn.com/tild6432-3338-4533-b262-633339353335/photo_1.jpg",
    label: "Золотое кольцо",
  },
  {
    keywords: ["красочный забег"],
    imageSrc: "https://colorrun5km.runc.run/uploads/page_card_photos/ColorRun2026-1.jpg",
    label: "Красочный забег",
  },
  {
    keywords: ["здорово кострома", "здорово, кострома"],
    imageSrc: "https://static.tildacdn.com/tild6139-3539-4661-b232-386230336431/kostroma.jpg",
    label: "Золотое кольцо",
  },
  {
    keywords: ["ночной забег москва"],
    imageSrc: "https://nightrun10km.runc.run/uploads/page_card_photos/NightRun_2026-9.jpg",
    label: "Ночной забег",
  },
  {
    keywords: ["белые ночи"],
    imageSrc: "https://wnmarathon.runc.run/uploads/page_card_photos/WN_photo_01.jpg",
    label: "Белые ночи",
  },
  {
    keywords: ["сергиевым путем", "сергиевым путём"],
    imageSrc: "https://static.tildacdn.com/tild6236-3466-4239-b666-393061326338/serg.jpg",
    label: "Золотое кольцо",
  },
  {
    keywords: ["ночной забег нижний новгород"],
    imageSrc: "https://rrweb.russiarunning.com/-x740/generalimages/0531a1b8-3876-4620-8961-2fa374e474e5.png",
    imageFit: "contain",
    label: "Ночной забег",
  },
  {
    keywords: ["suvorov extreme"],
    imageSrc: "https://goldenultra.ru/grut/files/photos/100.jpg",
    label: "Трейл",
  },
  {
    keywords: ["рыбинский полумарафон", "великий хлебный путь"],
    imageSrc: "https://static.tildacdn.com/tild6130-3230-4332-b932-366166366633/photo.jpg",
    label: "Золотое кольцо",
  },
  {
    keywords: ["ярославский полумарафон", "золотое кольцо"],
    imageSrc: "https://static.tildacdn.com/tild6331-6333-4635-b635-376262373361/photo.jpg",
    label: "Золотое кольцо",
  },
  {
    keywords: ["моя столица"],
    imageSrc: "https://static.tildacdn.com/tild3263-3036-4639-b830-653365663832/-min.jpg",
    imageFit: "contain",
    label: "Моя столица",
  },
];

function normalizeTitle(value: string): string {
  return value
    .toLowerCase()
    .replaceAll("ё", "е")
    .replace(/[«»|]/g, " ")
    .replace(/[^\p{L}\p{N}.&]+/gu, " ")
    .replace(/\s+/g, " ")
    .trim();
}

function getFallbackRaceVisual(race: Race): RaceVisual {
  const title = normalizeTitle(race.title);

  if (title.includes("ночной")) {
    return FALLBACK_VISUALS.night;
  }

  if (
    title.includes("trail") ||
    title.includes("extreme") ||
    title.includes("suvorov") ||
    title.includes("трейл") ||
    title.includes("экстрим")
  ) {
    return FALLBACK_VISUALS.trail;
  }

  if (Math.abs(race.distanceKm - 42.2) < 0.8) {
    return FALLBACK_VISUALS.marathon;
  }

  if (Math.abs(race.distanceKm - 21.1) < 0.4) {
    return FALLBACK_VISUALS.half;
  }

  return FALLBACK_VISUALS.short;
}

export function getRaceVisual(race: Race): RaceVisual {
  const fallback = getFallbackRaceVisual(race);

  if (race.coverImageUrl) {
    return {
      ...fallback,
      imageSrc: race.coverImageUrl,
      fallbackSrc: fallback.imageSrc,
    };
  }

  const title = normalizeTitle(race.title);
  const official = OFFICIAL_VISUALS.find((visual) =>
    visual.keywords.some((keyword) => title.includes(normalizeTitle(keyword))),
  );

  if (!official) {
    return fallback;
  }

  return {
    ...fallback,
    imageSrc: official.imageSrc,
    fallbackSrc: fallback.imageSrc,
    imageFit: official.imageFit ?? fallback.imageFit,
    label: official.label,
  };
}