local function map(mode, lhs, rhs, opts)
    local options = {noremap = true, silent = true}
    if opts then
        options = vim.tbl_extend('force', options, opts)
    end
    vim.api.nvim_set_keymap(mode, lhs, rhs, options)
end

local opt = {}

--------------------
-- Basic bindings --
--------------------
-- No one likes Esc
map('i', 'jk', [[<Esc>]], opt)

-- Better Y
map('n', 'Y', [[y$]], opt)

-- Continuous indent
map('v', '<', '<gv', opt)
map('v', '>', '>gv', opt)

-- Escape mode in terminal buffer
map('t', '<Esc>', '<C-\\><C-n>', opt)

-- Copy the whole buffer
map('n', '<C-a>', [[ <Cmd> %y+<CR>]], opt)
-- 'Legacy' save file
-- map('n', '<C-s>', ':w <CR>', opt)
-- Close buffer
map('n', '<C-x>', ':bd!<CR>', opt)

-- Remove trailing whitespace
map('n', '<A-w>', ':%s/\\s\\+$//e<CR>', opt)

-- Resize buffer
map('n', '<A-j>', ':resize -2<CR>', opt)
map('n', '<A-k>', ':resize +2<CR>', opt)
map('n', '<A-h>', ':vertical resize -2<CR>', opt)
map('n', '<A-l>', ':vertical resize +2<CR>', opt)

-- Switch between tabs and spaces
function toggleIndentStyle()
    if vim.o.expandtab == true then
        vim.cmd('set noexpandtab nosmarttab softtabstop& shiftwidth&')
        vim.cmd('echomsg "Switched to indent with tabs"')
    else
        vim.opt.expandtab = true
        vim.opt.smarttab = true
        vim.opt.softtabstop = 4
        vim.opt.shiftwidth = 4
        vim.cmd('echomsg "Switched to indent with 4 spaces"')
    end
end
map('n', '<A-t>', ':lua toggleIndentStyle()<CR>', opt)

-----------------------
-- Plugins' bindings --
-----------------------
-- Move between tabs
map('n', '<TAB>', [[<Cmd>BufferLineCycleNext<CR>]], opt)
map('n', '<S-TAB>', [[<Cmd>BufferLineCyclePrev<CR>]], opt)

-- NvimTree
map('n', '<C-n>', ':NvimTreeToggle<CR>', opt)