{ pkgs, inputs, ... }:

let
  ocPath = "/boot/EFI/OC";

  oceanixPkgs = import pkgs.path {
    localSystem = pkgs.stdenv.hostPlatform;
    inherit (pkgs) config;
    overlays = [ inputs.oceanix.overlays.default ];
  };

  ocResources = pkgs.fetchzip {
    url = "https://github.com/acidanthera/OcBinaryData/archive/refs/heads/master.zip";
    sha256 = "sha256-B5CABp0Y2dAVuw7185suaUuryl3iII4QNBVBttivQ7Y=";
  };

  ocConfig = inputs.oceanix.lib.OpenCoreConfig {
    pkgs = oceanixPkgs;
    modules = [
      (
        { ... }:
        {
          oceanix.opencore.settings = {
            UEFI.Output.ProvideConsoleGop = true;
            UEFI.Output.Resolution = "1366x768";
            UEFI.Output.TextRenderer = "BuiltinGraphics";

            UEFI.Audio = {
              AudioCodec = 0;
              AudioDevice = "PciRoot(0x0)/Pci(0x1b,0x0)";
              AudioOutMask = 1;
              AudioSupport = true;
              ResetTrafficClass = true;
              DisconnectHda = false;
              MaximumGain = -10;
              MinimumAssistGain = -30;
              MinimumAudibleGain = -128;
              PlayChime = "Enabled";
              SetupDelay = 0;
            };

            UEFI.AppleInput = {
              AppleEvent = "Builtin";
              CustomDelays = false;
              GraphicsInputMirroring = true;
              KeyInitialDelay = 50;
              KeySubsequentDelay = 5;
              PointerPollMask = -1;
              PointerPollMin = 10;
              PointerPollMax = 80;
              PointerSpeedDiv = 1;
              PointerSpeedMul = 1;
            };

            Misc.Boot.PickerMode = "External";
            Misc.Boot.PickerVariant = "Acidanthera\\Syrah";
            Misc.Boot.PickerAttributes = 144;
            Misc.Boot.Timeout = 15;
            Misc.Boot.HideAuxiliary = true;

            Misc.Debug = {
              AppleDebug = true;
              ApplePanic = true;
              DisableWatchDog = true;
              DisplayLevel = 2147483650;
              Target = 3;
            };

            Misc.Security.SecureBootModel = "Disabled";
            Misc.Security.ScanPolicy = 0;
            Misc.Security.Vault = "Optional";
            UEFI.Quirks.DisableSecurityPolicy = true;
            UEFI.Quirks.ReleaseUsbOwnership = true;

            PlatformInfo.Automatic = true;
            PlatformInfo.UpdateSMBIOSMode = "Create";
            PlatformInfo.Generic = {
              SystemProductName = "MacBookPro9,2";
              SystemSerialNumber = "C02J19YCDTY3";
              SystemUUID = "8FF32D62-EC2E-46D1-A6D3-D1A5748F5F7B";
              MLB = "C02227802QXF1YJ1M";
            };

            UEFI.Drivers = {
              "OpenRuntime.efi" = {
                Enabled = true;
              };
              "OpenCanopy.efi" = {
                Enabled = true;
              };
              "OpenLinuxBoot.efi" = {
                Enabled = true;
              };
              "AudioDxe.efi" = {
                Enabled = true;
              };
            };
            Misc.Entries = [ ];
          };
        }
      )
    ];
  };

in
{
  system.activationScripts.opencoreConfig = {
    text = ''
      echo "--- Kopurando In1t  ---"

      if [ ! -d "${ocPath}" ] || ! ${pkgs.diffutils}/bin/diff -r "${ocConfig.efiPackage}/EFI/OC" "${ocPath}" >/dev/null 2>&1; then
        echo "diffs are detected, writing EFI files..."
        rm -rf ${ocPath}
        mkdir -p ${ocPath}
        cp -rf ${ocConfig.efiPackage}/EFI/OC/* ${ocPath}/
        mkdir -p ${ocPath}/Resources
        cp -rf ${ocResources}/Resources/* ${ocPath}/Resources/
      else
        echo "EFI is already up to date."
      fi

      BOOT_DEV=$(${pkgs.util-linux}/bin/findmnt -n -o SOURCE /boot)

      if [ -n "$BOOT_DEV" ]; then
        TARGET_DISK=$(echo "$BOOT_DEV" | ${pkgs.gnused}/bin/sed -E 's/p?[0-9]+$//')
        PART_NUM=$(echo "$BOOT_DEV" | ${pkgs.gnugrep}/bin/grep -oE '[0-9]+$')

        if ! ${pkgs.efibootmgr}/bin/efibootmgr | ${pkgs.gnugrep}/bin/grep -q "OpenCore_Copland"; then
          echo "Registering OpenCore on $TARGET_DISK (partition $PART_NUM)..."
          ${pkgs.efibootmgr}/bin/efibootmgr -c -d "$TARGET_DISK" -p "$PART_NUM" -L "OpenCore_Copland" -l "\EFI\OC\OpenCore.efi"
        fi
      else
        echo "Error: Could not find mount point for /boot!"
      fi
    '';
  };
}