defmodule HomelabDashboardWeb.PageController do
  use HomelabDashboardWeb, :controller
  import Bitwise

  @public_services [
    %{
      name: "MTG",
      url: "https://adyrem.duckdns.org/mtg",
      description: "Magic: The Gathering collection",
      icon: "hero-puzzle-piece"
    },
    %{
      name: "Gitea",
      url: "https://adyrem.duckdns.org/git",
      description: "Git repository hosting",
      icon: "hero-code-bracket"
    }
  ]

  @internal_services [
    %{
      name: "Proxmox",
      url: "https://proxmox.homelab",
      description: "Virtualization & container management",
      icon: "hero-server"
    },
    %{
      name: "Grafana",
      url: "https://grafana.homelab",
      description: "Metrics & monitoring dashboards",
      icon: "hero-chart-bar"
    },
    %{
      name: "Pi-hole",
      url: "https://pihole.homelab/admin",
      description: "Network-wide DNS ad blocker",
      icon: "hero-shield-check"
    },
    %{
      name: "Jellyfin",
      url: "https://jellyfin.homelab",
      description: "Media server",
      icon: "hero-film"
    },
    %{
      name: "Jellyseerr",
      url: "https://jellyseerr.homelab",
      description: "Media request management",
      icon: "hero-ticket"
    },
    %{
      name: "Radarr",
      url: "https://radarr.homelab",
      description: "Movie collection manager",
      icon: "hero-video-camera"
    },
    %{
      name: "Sonarr",
      url: "https://sonarr.homelab",
      description: "TV series collection manager",
      icon: "hero-tv"
    },
    %{
      name: "Prowlarr",
      url: "https://prowlarr.homelab",
      description: "Indexer manager",
      icon: "hero-magnifying-glass"
    },
    %{
      name: "qBittorrent",
      url: "https://qbittorrent.homelab",
      description: "Torrent client",
      icon: "hero-arrow-down-tray"
    }
  ]

  def home(conn, _params) do
    render(conn, :home,
      public_services: @public_services,
      internal_services: @internal_services,
      show_internal: internal_network?(conn.remote_ip)
    )
  end

  defp internal_network?({127, _, _, _}), do: true
  defp internal_network?({10, _, _, _}), do: true
  defp internal_network?({192, 168, _, _}), do: true
  defp internal_network?({172, b, _, _}) when b in 16..31, do: true
  defp internal_network?({0, 0, 0, 0, 0, 0, 0, 1}), do: true
  # IPv6-mapped IPv4: ::ffff:x.x.x.x — decode and re-check
  defp internal_network?({0, 0, 0, 0, 0, 65535, ab, cd}) do
    internal_network?({ab >>> 8, ab &&& 0xFF, cd >>> 8, cd &&& 0xFF})
  end
  defp internal_network?(_), do: false
end