local function has_configuration(configurations, name, adapter)
  for _, configuration in ipairs(configurations or {}) do
    if configuration.name == name and configuration.type == adapter then return true end
  end

  return false
end

local function setup_cpp_dap(dap)
  dap.adapters.codelldb = dap.adapters.codelldb or {
    type = 'executable',
    command = 'codelldb',
  }

  local launch_name = 'Launch current file (codelldb)'
  local launch_configuration = {
    name = launch_name,
    type = 'codelldb',
    request = 'launch',
    program = function() return vim.fn.input('Path to executable: ', vim.fn.getcwd() .. '/', 'file') end,
    cwd = '${workspaceFolder}',
    stopOnEntry = false,
    args = {},
  }

  for _, language in ipairs { 'c', 'cpp' } do
    dap.configurations[language] = dap.configurations[language] or {}

    if not has_configuration(dap.configurations[language], launch_name, 'codelldb') then
      table.insert(dap.configurations[language], vim.deepcopy(launch_configuration))
    end
  end
end

---@module 'lazy'
---@type LazySpec
return {
  'mfussenegger/nvim-dap',
  dependencies = {
    'rcarriga/nvim-dap-ui',
    'nvim-neotest/nvim-nio',
    'mason-org/mason.nvim',
    'jay-babu/mason-nvim-dap.nvim',
    'leoluz/nvim-dap-go',
  },
  keys = {
    { '<F5>', function() require('dap').continue() end, desc = 'Debug: Start/Continue' },
    { '<F1>', function() require('dap').step_into() end, desc = 'Debug: Step Into' },
    { '<F2>', function() require('dap').step_over() end, desc = 'Debug: Step Over' },
    { '<F3>', function() require('dap').step_out() end, desc = 'Debug: Step Out' },
    { '<leader>b', function() require('dap').toggle_breakpoint() end, desc = 'Debug: Toggle Breakpoint' },
    { '<leader>B', function() require('dap').set_breakpoint(vim.fn.input 'Breakpoint condition: ') end, desc = 'Debug: Set Breakpoint' },
    -- Toggle to see last session result. Without this, you can't see session output in case of unhandled exception.
    { '<F7>', function() require('dapui').toggle() end, desc = 'Debug: See last session result.' },
  },
  config = function()
    local dap = require 'dap'
    local dapui = require 'dapui'
    local has_delve = vim.fn.executable 'dlv' == 1

    require('mason-nvim-dap').setup {
      automatic_installation = true,
      handlers = {},
      ensure_installed = { 'codelldb' },
    }

    ---@diagnostic disable-next-line: missing-fields
    dapui.setup {
      icons = { expanded = '▾', collapsed = '▸', current_frame = '*' },
      ---@diagnostic disable-next-line: missing-fields
      controls = {
        icons = {
          pause = '⏸',
          play = '▶',
          step_into = '⏎',
          step_over = '⏭',
          step_out = '⏮',
          step_back = 'b',
          run_last = '▶▶',
          terminate = '⏹',
          disconnect = '⏏',
        },
      },
    }

    dap.listeners.after.event_initialized['dapui_config'] = dapui.open
    dap.listeners.before.event_terminated['dapui_config'] = dapui.close
    dap.listeners.before.event_exited['dapui_config'] = dapui.close

    if has_delve then require('dap-go').setup {
      delve = {
        detached = vim.fn.has 'win32' == 0,
      },
    } end

    setup_cpp_dap(dap)
  end,
}