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local M = {}

function M.config()
  local lvim_dashboard = require "lvim.core.alpha.dashboard"
  local lvim_startify = require "lvim.core.alpha.startify"
  lvim.builtin.alpha = {
    dashboard = {
      config = {},
      section = lvim_dashboard.get_sections(),
      opts = { autostart = true },
    },
    startify = {
      config = {},
      section = lvim_startify.get_sections(),
      opts = { autostart = true },
    },
    active = true,
    mode = "dashboard",
  }
end

local function resolve_buttons(theme_name, button_section)
  if button_section.val and #button_section.val > 0 then
    return button_section.val
  end

  local selected_theme = require("alpha.themes." .. theme_name)
  local val = {}
  for _, entry in pairs(button_section.entries) do
    local on_press = function()
      local sc_ = entry[1]:gsub("%s", ""):gsub("SPC", "<leader>")
      local key = vim.api.nvim_replace_termcodes(sc_, true, false, true)
      vim.api.nvim_feedkeys(key, "normal", false)
    end
    local button_element = selected_theme.button(entry[1], entry[2], entry[3])
    -- this became necessary after recent changes in alpha.nvim (06ade3a20ca9e79a7038b98d05a23d7b6c016174)
    button_element.on_press = on_press

    button_element.opts = vim.tbl_extend("force", button_element.opts, entry[4] or button_section.opts or {})

    table.insert(val, button_element)
  end
  return val
end

local function resolve_config(theme_name)
  local selected_theme = require("alpha.themes." .. theme_name)
  local resolved_section = selected_theme.section
  local section = lvim.builtin.alpha[theme_name].section

  for name, el in pairs(section) do
    for k, v in pairs(el) do
      if name:match "buttons" and k == "entries" then
        resolved_section[name].val = resolve_buttons(theme_name, el)
      elseif v then
        resolved_section[name][k] = v
      end
    end

    resolved_section[name].opts = el.opts or {}
  end

  local opts = lvim.builtin.alpha[theme_name].opts or {}
  selected_theme.config.opts = vim.tbl_extend("force", selected_theme.config.opts, opts)

  return selected_theme.config
end

function M.setup()
  local status_ok, alpha = pcall(require, "alpha")
  if not status_ok then
    return
  end
  local mode = lvim.builtin.alpha.mode
  local config = lvim.builtin.alpha[mode].config

  -- this makes it easier to use a completely custom configuration
  if vim.tbl_isempty(config) then
    config = resolve_config(mode)
  end

  alpha.setup(config)

  return alpha
end

return M