# ABOUTME: Installs the Zed editor and seeds its user configuration.
# ABOUTME: nix-ld is what makes the language servers Zed downloads run here.

{ pkgs, ... }:

let
  # Zed rewrites this file whenever a setting is changed from its UI, so it is
  # copied into the home directory rather than linked from the store.
  zedSettings = pkgs.writeText "zed-settings.json" ''
    {
      "cli_default_open_behavior": "new_window",
      "reduce_motion": "on",
      "edit_predictions": {
        "provider": "none"
      },
      "project_panel": {
        "dock": "left"
      },
      "outline_panel": {
        "dock": "left"
      },
      "git_panel": {
        "dock": "left"
      },
      "base_keymap": "SublimeText",
      "cursor_shape": "block",
      "ui_font_size": 14,
      "ui_font_family": "UbuntuSans Nerd Font",
      "ui_font_features": {
        "calt": true
      },
      "buffer_font_family": "UbuntuSansMono Nerd Font",
      "buffer_font_size": 14,
      "theme": {
        "mode": "system",
        "light": "Catppuccin Latte",
        "dark": "Catppuccin Mocha"
      },
      "telemetry": {
        "diagnostics": false,
        "metrics": false
      },
      "terminal": {
        "shell": {
          "program": "zsh"
        },
        // LC_MESSAGES=C keeps tool output (git, pytest, ruff) in English so it
        // stays greppable. Number and date formatting follows the system LANG.
        "env": {
          "LC_MESSAGES": "C"
        }
      },
      "show_edit_predictions": false,
      "toolbar": {
        "quick_actions": false
      },
      "agent": {
        "dock": "right",
        "enabled": false,
        "button": false
      },
      "chat_panel": {
        "button": "never"
      },
      "collaboration_panel": {
        "dock": "left",
        "button": false
      },
      "auto_install_extensions": {
        "catppuccin": true,
        "dockerfile": true,
        "git-firefly": true,
        "html": true,
        "log": true,
        "nix": true,
        "php": true,
        "scss": true,
        "vue": true
      },
      "languages": {
        "Python": {
          // ruff formats and organizes imports, basedpyright does type checking.
          // The other three bundled servers are disabled explicitly: without the
          // negations the "..." placeholder pulls in pyright, pylsp and ty as well,
          // which means four type checkers reporting on the same file.
          "language_servers": [
            "ruff",
            "basedpyright",
            "!pyright",
            "!pylsp",
            "!ty",
            "..."
          ],
          "formatter": {
            "language_server": {
              "name": "ruff"
            }
          },
          "code_actions_on_format": {
            "source.organizeImports.ruff": true
          }
        },
        "JavaScript": {
          "code_actions_on_format": {
            "source.fixAll.eslint": true
          }
        },
        "TypeScript": {
          "code_actions_on_format": {
            "source.fixAll.eslint": true
          }
        },
        "TSX": {
          "code_actions_on_format": {
            "source.fixAll.eslint": true
          }
        },
        "PHP": {
          // Intelephense without a licence key: completion, diagnostics, hover,
          // formatting and find-all-references are covered. Rename, code actions
          // and inlay hints stay locked behind the paid tier.
          "language_servers": [
            "intelephense",
            "!phpactor",
            "!phptools",
            "!phpantom",
            "..."
          ]
        }
      },
      "lsp": {
        "rust-analyzer": {
          "initialization_options": {
            "check": {
              "command": "clippy"
            }
          }
        }
      }
    }
  '';
in
{
  # CLI entry point is `zeditor`, not `zed`. Needs working Vulkan, the GUI does
  # not start without it.
  environment.systemPackages = [ pkgs.zed-editor ];

  # Zed downloads its language servers into ~/.local/share/zed/languages/ and
  # those binaries expect an FHS layout that does not exist here. nix-ld
  # supplies the loader they look for — the route the NixOS wiki recommends,
  # over zed-editor.fhsWithPackages, which would cut the servers off from
  # project-level tooling coming out of a nix-shell.
  programs.nix-ld.enable = true;

  systemd.user.tmpfiles.rules = [
    "C %h/.config/zed/settings.json 0644 - - - ${zedSettings}"
  ];
}