home/modules/home/git.nix

# Git module
#
# This module configures Git with Home Manager's programs.git options.
# It supports both personal and work profiles with different signing keys
# and includeIf paths for project-specific configurations.
#
# Based on the chezmoi configuration from dot_gitconfig.tmpl
{
  config,
  pkgs,
  lib,
  ...
}:
with lib; let
  cfg = config.modules.git;
in {
  options.modules.git = {
    enable = mkEnableOption "Git configuration";

    userName = mkOption {
      type = types.str;
      default = "Morten Olsen";
      description = "Git user name";
    };

    userEmail = mkOption {
      type = types.str;
      description = "Git user email address";
      example = "alice@personal.example.com";
    };

    signingKey = mkOption {
      type = types.str;
      description = "SSH signing key (public key content)";
      example = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAI...";
    };

    includes = mkOption {
      type = types.listOf (types.submodule {
        options = {
          condition = mkOption {
            type = types.str;
            description = "The includeIf condition (e.g., gitdir:~/Projects/)";
            example = "gitdir:~/Projects/";
          };
          path = mkOption {
            type = types.str;
            description = "Path to the included gitconfig file";
            example = "~/Projects/.gitconfig";
          };
        };
      });
      default = [];
      description = "List of conditional includes for project-specific git configurations";
    };
  };

  config = mkIf cfg.enable {
    # Global gitignore file
    home.file.".gitignore_global".text = ''
      .envrc
      *._local.*
      .DS_Store
      *.tsbuildinfo
      .env
    '';

    # Delta pager for better diffs (separate program in newer Home Manager)
    programs.delta = {
      enable = true;
      enableGitIntegration = true;
      options = {
        navigate = true;
        light = false;
        side-by-side = true;
        line-numbers = true;
      };
    };

    programs.git = {
      enable = true;

      # Signing configuration with 1Password
      signing = {
        key = cfg.signingKey;
        signByDefault = true;
      };

      # Conditional includes for project-specific configurations
      includes = map (inc: {
        condition = inc.condition;
        path = inc.path;
      }) cfg.includes;

      # All git settings using the new unified settings option
      settings = {
        # User configuration
        user = {
          name = cfg.userName;
          email = cfg.userEmail;
        };

        # Core settings (pager is set by programs.delta)
        core = {
          hooksPath = "/dev/null";
          excludesfile = "~/.gitignore_global";
        };

        # Pull settings
        pull = {
          ff = "only";
        };

        # Init settings
        init = {
          defaultBranch = "main";
        };

        # Push settings
        push = {
          autoSetupRemote = true;
        };

        # GPG/SSH signing settings
        gpg = {
          format = "ssh";
        };

        "gpg \"ssh\"" = {
          program = "/Applications/1Password.app/Contents/MacOS/op-ssh-sign";
        };

        # Commit settings (gpgsign is handled by signing.signByDefault)
        commit = {
          gpgsign = true;
        };

        # URL rewrites
        "url \"https://\"" = {
          insteadOf = "git://";
        };

        # Git LFS
        filter.lfs = {
          clean = "git-lfs clean -- %f";
          smudge = "git-lfs smudge -- %f";
          process = "git-lfs filter-process";
          required = true;
        };

        # Difftool configuration
        "difftool \"nvimdiff\"" = {
          cmd = "nvim -d \"$LOCAL\" \"$REMOTE\"";
        };

        # Aliases
        alias = {
          graph = "log --graph --color --pretty=format:\"%C(yellow)%H%C(green)%d%C(reset)%n%x20%cd%n%x20%cn%C(blue)%x20(%ce)%x20%C(cyan)[gpg:%GK%x20%G?]%C(reset)%n%x20%s%n\"";
          ll = "log --oneline";
          st = "status -sb";
          cm = "commit -m";
          append = "commit --amend --no-edit";
          sobmodules = "submodule update --init --recursive";
          df = "difftool -t nvimdiff -y";
          last = "log -1 --stat";
          br = "branch --format='%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(contents:subject) %(color:green)(%(committerdate:relative)) [%(authorname)]' --sort=-committerdate";
          brr = "branch --remote --format='%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(contents:subject) %(color:green)(%(committerdate:relative)) [%(authorname)]' --sort=-committerdate";
          undo = "reset HEAD~1 --mixed";
          unstage = "reset HEAD --";
        };
      };
    };
  };
}