local opt, cmd, api = vim.opt, vim.cmd, vim.api
local fn = vim.fn
local v, g = vim.v, vim.g

-- colorscheme -----------------------------------------------------------------

cmd.colorscheme("basic")

-- statusline ------------------------------------------------------------------

function Statusline()
  local wordcount = fn.wordcount()
  return table.concat({
    fn.pathshorten(fn.getcwd()),
    " %=",
    " <%b>",
    " ", wordcount.visual_chars or wordcount.cursor_chars, "/", wordcount.chars,
    " ", wordcount.visual_words or wordcount.cursor_words, "/", wordcount.words,
    " %l/%L",
    " %c"
  })
end

-- options ---------------------------------------------------------------------

-- moving around, searching and patterns
opt.path = {".", "", "**"}
opt.ignorecase = true
opt.smartcase = true

-- displaying text
opt.scrolloff = 10
opt.breakindent = true
opt.showbreak = "+++ "
opt.number = true
opt.relativenumber = true
opt.colorcolumn = "+1"

-- multiple windows
opt.laststatus = 3
opt.statusline = "%!v:lua.Statusline()"

-- multiple tab pages
opt.showtabline = 2

-- terminal
opt.title = true

-- messages and info
opt.shortmess:append({ I = true })

-- selecting text
opt.clipboard = "unnamedplus"

-- editing text
opt.undofile = true
opt.textwidth = 80
opt.completeopt = { "menuone", "preview", "noselect" }

-- tabs and indenting
opt.tabstop = 4
opt.shiftwidth = 4
opt.smarttab = true
opt.softtabstop = -1
opt.expandtab = true
opt.smartindent = true

-- reading and writing files
opt.writebackup = false
opt.backup = false

-- command line editing
opt.wildignorecase = true

-- various
opt.signcolumn = "number"
opt.winbar = "%f%( %h%m%r%y%)"
opt.wildoptions = { "fuzzy" }


-- keymaps ---------------------------------------------------------------------

local keymap_set = vim.keymap.set

keymap_set("n", "<esc>", "<cmd>nohlsearch<cr>")
keymap_set("c", "<m-h>", "<left>")
keymap_set("c", "<m-l>", "<right>")
keymap_set("n", "<leader>f", ":find ")
keymap_set("n", "<leader>b", ":buffer ")
keymap_set("n", "<leader>h", ":help ")
keymap_set("n", "<leader>g", ":vimgrep /")
keymap_set("n", "<leader>s", "<cmd>:set spell!<cr>")
keymap_set("n", "<leader>m", "<cmd>make<cr>")
keymap_set("n", "<leader>d", "<cmd>bdelete<cr>")
keymap_set("n", "]b", "<cmd>bnext<cr>")
keymap_set("n", "[b", "<cmd>bprev<cr>")
keymap_set("n", "]B", "<cmd>blast<cr>")
keymap_set("n", "[B", "<cmd>bfirst<cr>")
keymap_set("n", "]t", "<cmd>tabnext<cr>")
keymap_set("n", "[t", "<cmd>tabprev<cr>")
keymap_set("n", "]T", "<cmd>tablast<cr>")
keymap_set("n", "[T", "<cmd>tabfirst<cr>")
keymap_set("n", "]q", "<cmd>cnext<cr>zz")
keymap_set("n", "[q", "<cmd>cprev<cr>zz")
keymap_set("n", "]Q", "<cmd>clast<cr>zz")
keymap_set("n", "[Q", "<cmd>cfirst<cr>zz")
keymap_set("n", "<leader>co", "<cmd>copen<cr>")
keymap_set("n", "<leader>cc", "<cmd>cclose<cr>")
keymap_set("n", "<c-h>", "<c-w>h")
keymap_set("n", "<c-j>", "<c-w>j")
keymap_set("n", "<c-k>", "<c-w>k")
keymap_set("n", "<c-l>", "<c-w>l")
keymap_set("n", "<leader>.", "<cmd>edit.<cr>")


-- buffer autocomplete ---------------------------------------------------------

api.nvim_create_autocmd("InsertCharPre", {
  group = api.nvim_create_augroup("Buffer autocompletion", {}),
  desc = "Buffer autocomplete on InsertCharPre",
  callback = function ()
    if fn.pumvisible() == 0 and v.char:find("%w") then
      api.nvim_input("<c-n>")
    end
  end
})