# docs:
#   https://nixos.wiki/wiki/Flakes
#   https://serokell.io/blog/practical-nix-flakes

{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-21.11";
    pkgs-gitea.url = "nixpkgs/c777cdf5c564015d5f63b09cc93bef4178b19b01";
    pkgs-mobile.url = "nixpkgs/6daa4a5c045d40e6eae60a3b6e427e8700f1c07f"; # currently pinned to mobile-nixos tip
    # pkgs-mobile.url = "nixpkgs/7e567a3d092b7de69cdf5deaeb8d9526de230916";  # 2021/06/21, coordinated with mobile-nixos 85557dca93ae574eaa7dc7b1877edf681a280d35 ; builds linux, but no errors after running for 4 hours
    # pkgs-mobile.url = "nixpkgs/cbe587c735b734405f56803e267820ee1559e6c1";  # successful mobile-nixos build https://hydra.nixos.org/eval/1759474#tabs-inputs
    # pkgs-mobile.url = "nixpkgs/48037fd90426e44e4bf03e6479e88a11453b9b66";  # successful mobile-nixos build 2022/05/19 https://hydra.nixos.org/eval/1762659#tabs-inputs
    # pkgs-mobile.url = "nixpkgs/1d7db1b9e4cf1ee075a9f52e5c36f7b9f4207502"; 
    # pkgs-mobile.url = "nixpkgs/43ff6cb1c027d13dc938b88eb099462210fea52f";
    # pkgs-mobile.url = "nixpkgs/98bb5b77c8c6666824a4c13d23befa1e07210ef1";  # mobile-nixos build 2022/02/10 https://hydra.nixos.org/eval/1743260#tabs-inputs fails building lvgui
    # pkgs-mobile.url = "nixpkgs/nixos-21.11";  # linux fails at config time
    # pkgs-mobile.url = "nixpkgs/5aaed40d22f0d9376330b6fa413223435ad6fee5";  # (untested) associated with HN comment 2022/01/16 https://hydra.nixos.org/build/164693256#tabs-buildinputs -- still tries to compile linux from source
    # pkgs-mobile.url = "nixpkgs/23d785aa6f853e6cf3430119811c334025bbef55";  # latest mobile-nixos:unstable:device.pine64-pinephone.aarch64-linux build 2022/02/20 https://hydra.nixos.org/build/167888996#tabs-buildinputs  -- still tries to compile linux from source, fails building lvgui
    # this includes a patch to enable flake support
    mobile-nixos.url = "github:ngi-nix/mobile-nixos/afe022e1898aa05381077a89c3681784e6074458";
    home-manager.url = "github:nix-community/home-manager/release-21.11";
    # XXX colin: is this right?
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
  };
  outputs = { self, nixpkgs, pkgs-gitea, pkgs-mobile, mobile-nixos, home-manager }: {
    nixosConfigurations.uninsane = nixpkgs.lib.nixosSystem {
      pkgs = self.packages.aarch_64-linux.pkgs;
      system = "aarch64-linux";
      modules = [
        ./configuration.nix
        ./cfg
        ./modules
        ({ pkgs, ... }: {
          # This value determines the NixOS release from which the default
          # settings for stateful data, like file locations and database versions
          # on your system were taken. It‘s perfectly fine and recommended to leave
          # this value at the release version of the first install of this system.
          # Before changing this value read the documentation for this option
          # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
          system.stateVersion = "21.11"; # Did you read the comment?
        })
      ];
    };

    nixosConfigurations.lappy = nixpkgs.lib.nixosSystem {
      pkgs = self.packages.x86_64-linux.pkgs;
      system = "x86_64-linux";
      specialArgs = { home-manager = home-manager; };
      modules = [
        ./configuration.nix
        ./lappy
      ];
    };
    nixosConfigurations.pda = pkgs-mobile.lib.nixosSystem {
      # inherit (self.packages.aarch64-linux) pkgs;
      system = "aarch64-linux";
      modules = [
        # ({ pkgs, ... }: {
        #   nixpkgs.config.allowUnfree = true;
        # })
        # home-manager.nixosModules.home-manager {
        #   home-manager.useGlobalPkgs = true;
        #   home-manager.useUserPackages = true;
        #   home-manager.users.colin.imports = [ ./colin.nix ];
        # }
        # ./configuration.nix
        # ./users.nix
        mobile-nixos.nixosModules.pine64-pinephone ({
          users.users.root.password = "147147";
        })
        ({ pkgs, ... }: {
          # This value determines the NixOS release from which the default
          # settings for stateful data, like file locations and database versions
          # on your system were taken. It‘s perfectly fine and recommended to leave
          # this value at the release version of the first install of this system.
          # Before changing this value read the documentation for this option
          # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
          system.stateVersion = "21.11"; # Did you read the comment?
        })
        # ({ pkgs, mobile-nixos, ... }: {
        #   imports = [
        #     (import "${mobile-nixos}/lib/configuration.nix" { device = "pine64-pinephone"; })
        #   ];
        # })
        # ({ pkgs, ... }: {
        #   imports = [
        #     <mobnixos>/devices/pine64-pinephone
        #   ];
        # })
      ];
    };
    packages = nixpkgs.lib.genAttrs nixpkgs.lib.platforms.all (system:
      {
        pkgs = import nixpkgs {
          inherit system;
          config.allowUnfree = true;

          overlays = [
            (self: super: {
              #### customized packages
              # nixos-unstable pleroma is too far out-of-date for our db
              pleroma = super.callPackage ./pkgs/pleroma { };
              # jackett doesn't allow customization of the bind address: this will probably always be here.
              jackett = self.callPackage ./pkgs/jackett { pkgs = super; };
              # fix abrupt HDD poweroffs as during reboot. patching systemd requires rebuilding nearly every package.
              # systemd = import ./pkgs/systemd { pkgs = super; };

              #### nixos-unstable packages
              # gitea: 1.16.5 contains a fix which makes manual user approval *actually* work.
              # https://github.com/go-gitea/gitea/pull/19119
              # safe to remove after 1.16.5 (or 1.16.7 if we need db compat?)
              gitea = pkgs-gitea.legacyPackages."${system}".gitea;

              # patch rpi uboot with something that fixes USB HDD boot
              ubootRaspberryPi4_64bit = self.callPackage ./pkgs/ubootRaspberryPi4_64bit { pkgs = super; };
            })
          ];
        };
      }
    );

    # flake-utils.lib.eachDefaultSystem (system:
    #   let pkgs = nixpkgs.legacyPackages.${system};
    #   in {
    #     # packages.hello = pkgs.hello;

    #     # devShell = pkgs.mkShell { buildInputs = [ pkgs.hello pkgs.cowsay ]; };
    #     nixosConfigurations.nixos = nixpkgs.lib.nixosSystem {
    #       system = "${system}";
    #     };
    #   }
    # );
  };
}