export type Branch = {
  id: string;
  slug: string;
  name: string;
  area: string;
  phone: string;
  hours: string;
  is24h: boolean;
  lat: number;
  lng: number;
  pickupAvailable: boolean;
  mapsUrl: string;
};

/** Verified from gishenpharmacy.wordpress.com contact page + public listings. */
export const branches: Branch[] = [
  {
    id: "bole",
    slug: "bole",
    name: "Bole Branch",
    area: "Bole, Addis Ababa",
    phone: "+251930033290",
    hours: "Open 24 hours",
    is24h: true,
    lat: 8.9806,
    lng: 38.799,
    pickupAvailable: true,
    mapsUrl:
      "https://www.google.com/maps/search/?api=1&query=Gishen%20Pharmacy%20Bole%20Addis%20Ababa",
  },
  {
    id: "cmc",
    slug: "cmc-michael",
    name: "CMC Michael Branch",
    area: "CMC Michael, Addis Ababa",
    phone: "+251930102175",
    hours: "Open 24 hours",
    is24h: true,
    lat: 9.0227,
    lng: 38.826,
    pickupAvailable: true,
    mapsUrl:
      "https://www.google.com/maps/search/?api=1&query=Gishen%20Pharmacy%20CMC%20Michael%20Addis%20Ababa",
  },
  {
    id: "jemo",
    slug: "jemo",
    name: "Jemo Branch",
    area: "Jemo, Addis Ababa",
    phone: "+251930033292",
    hours: "Open 24 hours",
    is24h: true,
    lat: 8.963,
    lng: 38.72,
    pickupAvailable: true,
    mapsUrl:
      "https://www.google.com/maps/search/?api=1&query=Gishen%20Pharmacy%20Jemo%20Addis%20Ababa",
  },
  {
    id: "stadium",
    slug: "stadium",
    name: "Stadium Branch",
    area: "Stadium, Addis Ababa",
    phone: "+251930033291",
    hours: "8:00 AM – 8:00 PM",
    is24h: false,
    lat: 9.012,
    lng: 38.763,
    pickupAvailable: true,
    mapsUrl:
      "https://www.google.com/maps/search/?api=1&query=Gishen%20Pharmacy%20Stadium%20Addis%20Ababa",
  },
  {
    id: "mexico",
    slug: "mexico",
    name: "Mexico Branch",
    area: "Mexico Square, Addis Ababa",
    phone: "+251935998678",
    hours: "8:00 AM – 9:00 PM",
    is24h: false,
    lat: 9.01,
    lng: 38.745,
    pickupAvailable: true,
    mapsUrl:
      "https://www.google.com/maps/search/?api=1&query=Gishen%20Pharmacy%20Mexico%20Addis%20Ababa",
  },
  {
    id: "golagol",
    slug: "golagol",
    name: "Golagol Branch",
    area: "Golagol, Addis Ababa",
    phone: "+251930076930",
    hours: "8:00 AM – 8:00 PM",
    is24h: false,
    lat: 9.03,
    lng: 38.75,
    pickupAvailable: true,
    mapsUrl:
      "https://www.google.com/maps/search/?api=1&query=Gishen%20Pharmacy%20Golagol%20Addis%20Ababa",
  },
  {
    id: "hayahulet",
    slug: "hayahulet",
    name: "Hayahulet Branch",
    area: "Hayahulet, Addis Ababa",
    phone: "+251930033292",
    hours: "8:00 AM – 8:00 PM",
    is24h: false,
    lat: 9.02,
    lng: 38.79,
    pickupAvailable: true,
    mapsUrl:
      "https://www.google.com/maps/search/?api=1&query=Gishen%20Pharmacy%20Hayahulet%20Addis%20Ababa",
  },
];

export function getBranchById(id: string) {
  return branches.find((b) => b.id === id);
}

export function distanceKm(
  lat1: number,
  lng1: number,
  lat2: number,
  lng2: number,
) {
  const toRad = (v: number) => (v * Math.PI) / 180;
  const R = 6371;
  const dLat = toRad(lat2 - lat1);
  const dLng = toRad(lng2 - lng1);
  const a =
    Math.sin(dLat / 2) ** 2 +
    Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) * Math.sin(dLng / 2) ** 2;
  return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
}

export function nearestBranches(lat: number, lng: number, limit = 3) {
  return [...branches]
    .map((b) => ({ ...b, distance: distanceKm(lat, lng, b.lat, b.lng) }))
    .sort((a, b) => a.distance - b.distance)
    .slice(0, limit);
}