-- ============================================================
-- BUFFERLINE
-- Buffer tabs
-- ============================================================

local plugins = {
  {
    src = 'https://github.com/akinsho/bufferline.nvim',
    version = vim.version.range '*',
  },
}

if vim.g.have_nerd_font then table.insert(plugins, 'https://github.com/nvim-tree/nvim-web-devicons') end

vim.pack.add(plugins)

-- ============================================================
-- SETUP
-- ============================================================

require('bufferline').setup {
  options = {
    mode = 'buffers',

    numbers = 'none',

    close_command = 'bdelete! %d',
    right_mouse_command = 'bdelete! %d',

    left_mouse_command = 'buffer %d',
    middle_mouse_command = nil,

    indicator = {
      style = 'underline',
    },

    buffer_close_icon = '󰅖',
    modified_icon = '●',
    close_icon = '',
    left_trunc_marker = '',
    right_trunc_marker = '',

    max_name_length = 24,
    max_prefix_length = 18,
    tab_size = 20,

    diagnostics = 'nvim_lsp',

    diagnostics_indicator = function(_, _, diagnostics_dict)
      local s = ' '
      for e, n in pairs(diagnostics_dict) do
        local sym = e == 'error' and ' ' or (e == 'warning' and ' ') or ' '

        s = s .. n .. sym
      end
      return s
    end,

    offsets = {
      {
        filetype = 'neo-tree',
        text = 'File Explorer',
        highlight = 'Directory',
        text_align = 'left',
      },
    },

    show_buffer_icons = true,
    show_buffer_close_icons = false,
    show_close_icon = false,

    show_tab_indicators = true,

    persist_buffer_sort = true,
    separator_style = 'slant',

    enforce_regular_tabs = false,
    always_show_bufferline = true,

    hover = {
      enabled = true,
      delay = 200,
      reveal = { 'close' },
    },
  },
}

-- ============================================================
-- KEYMAPS
-- ============================================================

-- Next buffer
vim.keymap.set('n', '<Tab>', '<Cmd>BufferLineCycleNext<CR>', {
  desc = 'Next Buffer',
  silent = true,
})

-- Previous buffer
vim.keymap.set('n', '<S-Tab>', '<Cmd>BufferLineCyclePrev<CR>', {
  desc = 'Previous Buffer',
  silent = true,
})

-- Pin buffer
vim.keymap.set('n', '<leader>bp', '<Cmd>BufferLineTogglePin<CR>', {
  desc = 'Pin Buffer',
  silent = true,
})

-- Close buffer
vim.keymap.set('n', '<leader>bc', '<Cmd>bdelete<CR>', {
  desc = 'Close Buffer',
  silent = true,
})

-- Go to buffer by number
for i = 1, 9 do
  vim.keymap.set('n', '<leader>' .. i, function() require('bufferline').go_to(i, true) end, {
    desc = 'Go to buffer ' .. i,
    silent = true,
  })
end