# Debug Adapter Protocol client implementation for Neovim.
{ config, lib, ... }:
{
  config.programs.nixvim = lib.mkIf config.development.nixvim.enable {
    plugins.dap = {
      enable = true;

      # Example adapter — adjust/add per language you actually debug.
      # This one assumes you have `netcoredbg`/`codelldb`/etc. available,
      # swap for whatever debuggers you use.
      adapters.servers = {
        # Example: python debugpy adapter
        # python = {
        #   command = "${pkgs.python3Packages.debugpy}/bin/python";
        #   args = [ "-m" "debugpy.adapter" ];
        # };
      };
    };

    keymaps = [
      # Core DAP controls
      {
        mode = "n";
        key = "<leader>dc";
        action = "<cmd>lua require('dap').continue()<CR>";
        options.desc = "Debug: Continue";
      }
      {
        mode = "n";
        key = "<leader>di";
        action = "<cmd>lua require('dap').step_into()<CR>";
        options.desc = "Debug: Step Into";
      }
      {
        mode = "n";
        key = "<leader>do";
        action = "<cmd>lua require('dap').step_over()<CR>";
        options.desc = "Debug: Step Over";
      }
      {
        mode = "n";
        key = "<leader>dO";
        action = "<cmd>lua require('dap').step_out()<CR>";
        options.desc = "Debug: Step Out";
      }
      {
        mode = "n";
        key = "<leader>db";
        action = "<cmd>lua require('dap').toggle_breakpoint()<CR>";
        options.desc = "Debug: Toggle Breakpoint";
      }
      {
        mode = "n";
        key = "<leader>dB";
        action = "<cmd>lua require('dap').set_breakpoint(vim.fn.input('Breakpoint condition: '))<CR>";
        options.desc = "Debug: Conditional Breakpoint";
      }
      {
        mode = "n";
        key = "<leader>dl";
        action = "<cmd>lua require('dap').run_last()<CR>";
        options.desc = "Debug: Run Last";
      }
      {
        mode = "n";
        key = "<leader>dt";
        action = "<cmd>lua require('dap').terminate()<CR>";
        options.desc = "Debug: Terminate";
      }
      {
        mode = "n";
        key = "<leader>dr";
        action = "<cmd>lua require('dap').repl.toggle()<CR>";
        options.desc = "Debug: Toggle REPL";
      }
      {
        mode = "n";
        key = "<leader>dd";
        action = "<cmd>lua vim.diagnostic.open_float()<CR>";
        options.desc = "Diagnostics: Line diagnostics float";
      }
      {
        mode = "n";
        key = "<leader>dx";
        action = "<cmd>lua vim.diagnostic.close()<CR>";
        options.desc = "Diagnostics: Close float";
      }
      {
        mode = "n";
        key = "<leader>dn";
        action = "<cmd>lua vim.diagnostic.goto_next()<CR>";
        options.desc = "Diagnostics: Next";
      }
      {
        mode = "n";
        key = "<leader>dp";
        action = "<cmd>lua vim.diagnostic.goto_prev()<CR>";
        options.desc = "Diagnostics: Previous";
      }
      {
        mode = "n";
        key = "<leader>dq";
        action = "<cmd>lua vim.diagnostic.setloclist()<CR>";
        options.desc = "Diagnostics: Load location list";
      }
    ];

    # Auto open/close dap-ui with the debug session lifecycle
    extraConfigLua = ''
      local dap, dapui = require("dap"), require("dapui")
      dap.listeners.after.event_initialized["dapui_config"] = function()
        dapui.open()
      end
      dap.listeners.before.event_terminated["dapui_config"] = function()
        dapui.close()
      end
      dap.listeners.before.event_exited["dapui_config"] = function()
        dapui.close()
      end
    '';
  };
}