-- options ---------------------------------------------------------------------
-- colorscheme
vim.cmd.colorscheme("basic")

-- leader
vim.g.mapleader = " "
vim.g.maplocalleader = " "
vim.keymap.set({ "n", "v" }, "<space>", "<nop>", { silent = true })

-- general
vim.opt.undofile = true
vim.opt.backup = false
vim.opt.writebackup = false
vim.opt.mouse = {}
vim.opt.title = true

-- appearance
vim.opt.shortmess:append({ I = true })
vim.opt.number = true
vim.opt.relativenumber = true
vim.opt.signcolumn = "number"
vim.opt.textwidth = 80
vim.opt.colorcolumn = "+1"

-- tabline, winbar, statusline
vim.opt.showtabline = 2
vim.opt.winbar = "%f%( %h%m%r%y%)"
vim.opt.laststatus = 3
function _G.statusline()
  local col = vim.api.nvim_win_get_cursor(0)[2] + 1
  local char = vim.api.nvim_get_current_line():sub(col, col):gsub("%%", "%%%1")
  local wc = vim.fn.wordcount()
  return table.concat({
    vim.fn.pathshorten(vim.fn.getcwd()),
    "%=",
    "<", char, "> %b ",
    wc.visual_chars or wc.cursor_chars, "/", wc.chars, " ",
    wc.visual_words or wc.cursor_words, "/", wc.words
  })
end
vim.opt.statusline = "%!v:lua.statusline()"

-- behaviour
vim.opt.ignorecase = true
vim.opt.infercase = true
vim.opt.smartcase = true
vim.opt.smartindent = true
vim.opt.clipboard = "unnamedplus"
vim.opt.whichwrap = {
  ["b"] = true,
  ["s"] = true,
  ["h"] = true,
  ["l"] = true,
  ["<"] = true,
  [">"] = true,
  ["~"] = true,
  ["["] = true,
  ["]"] = true
}
vim.opt.wildoptions = { "fuzzy" }
vim.opt.wildignorecase = true

-- path
vim.opt.path = ".,,**"
-- local root = vim.fs.find({ ".git" }, { upward = true })[1]

-- completion
vim.opt.completeopt = {
  "menuone",
  "preview",
  "noinsert",
  "noselect"
}

-- keymaps ---------------------------------------------------------------------
-- clear hlsearch
vim.keymap.set( "n", "<esc>", function()
  vim.cmd.nohlsearch()
end, { desc = "Stop the highlighting for the 'hlsearch' option" })

-- move cursor with alt in c-mode
vim.keymap.set("c", "<m-h>", "<left>", { desc = "Left" })
vim.keymap.set("c", "<m-l>", "<right>", { desc = "Right" })

-- move cursor with alt in i-mode
vim.keymap.set("i", "<m-h>", "<left>", { desc = "Left" })
vim.keymap.set("i", "<m-j>", "<down>", { desc = "Down" })
vim.keymap.set("i", "<m-k>", "<up>", { desc = "Up" })
vim.keymap.set("i", "<m-l>", "<right>", { desc = "Right" })

-- move cursor with alt in t-mode
vim.keymap.set("t", "<m-h>", "<left>", { desc = "Left" })
vim.keymap.set("t", "<m-j>", "<down>", { desc = "Down" })
vim.keymap.set("t", "<m-k>", "<up>", { desc = "Up" })
vim.keymap.set("t", "<m-l>", "<right>", { desc = "Right" })

-- navigate windows
vim.keymap.set("n", "<c-h>", "<c-w>h", { desc = "Navigate window left"})
vim.keymap.set("n", "<c-j>", "<c-w>j", { desc = "Navigate window down"})
vim.keymap.set("n", "<c-k>", "<c-w>k", { desc = "Navigate window up"})
vim.keymap.set("n", "<c-l>", "<c-w>l", { desc = "Navigate window right"})
vim.keymap.set("i", "<c-h>", "<c-\\><c-n><c-w>h", { desc = "Navigate window left"})
vim.keymap.set("i", "<c-j>", "<c-\\><c-n><c-w>j", { desc = "Navigate window down"})
vim.keymap.set("i", "<c-k>", "<c-\\><c-n><c-w>k", { desc = "Navigate window up"})
vim.keymap.set("i", "<c-l>", "<c-\\><c-n><c-w>l", { desc = "Navigate window right"})
vim.keymap.set("t", "<c-h>", "<c-\\><c-n><c-w>h", { desc = "Navigate window left"})
vim.keymap.set("t", "<c-j>", "<c-\\><c-n><c-w>j", { desc = "Navigate window down"})
vim.keymap.set("t", "<c-k>", "<c-\\><c-n><c-w>k", { desc = "Navigate window up"})
vim.keymap.set("t", "<c-l>", "<c-\\><c-n><c-w>l", { desc = "Navigate window right"})

-- navigate buffer
vim.keymap.set("n", "<c-d>", "<c-d>zz")
vim.keymap.set("n", "<c-u>", "<c-u>zz")

-- cmdline history navigation
vim.keymap.set("c", "<c-p>", "<up>")
vim.keymap.set("c", "<c-n>", "<down>")

-- menus
vim.keymap.set("n", "<leader>f", ":find ", { desc = ":find" })
vim.keymap.set("n", "<leader>b", ":buffer ", { desc = ":buffer" })
vim.keymap.set("n", "<leader>h", ":help ", { desc = ":help" })

-- spell
vim.keymap.set("n", "<leader>s", function()
  vim.opt_local.spell = not(vim.opt_local.spell:get())
end, { desc = "Toggle spell" })

-- make
vim.keymap.set("n", "<leader>m", "<cmd>make<cr>", { desc = ":make" })

-- buffers ---------------------------------------------------------------------
vim.keymap.set("n", "]b", "<cmd>bnext<cr>", { desc = "Next buffer" })
vim.keymap.set("n", "[b", "<cmd>bprev<cr>", { desc = "Previous buffer" })
vim.keymap.set("n", "<leader>d", "<cmd>enew<cr><cmd>bd #<cr>", { desc = "Delete buffer" })
vim.keymap.set("n", "<leader>D", "<cmd>bd<cr>", { desc = "Delete buffer and close window" })

-- tabs ------------------------------------------------------------------------
vim.keymap.set("n", "]t", "<cmd>tabnext<cr>", { desc = "Next tab" })
vim.keymap.set("n", "[t", "<cmd>tabprevious<cr>", { desc = "Previous tab" })

-- vimgrep ---------------------------------------------------------------------
vim.keymap.set("n", "<leader>g", ":vimgrep / **/*<c-left><c-left>/")

local vimgrep_group = vim.api.nvim_create_augroup("Vimgrep", {})
vim.api.nvim_create_autocmd("QuickfixCmdPost", {
  group = vimgrep_group,
  pattern = "vimgrep",
  desc = "Open quickfix window after :vimgrep",
  command = "copen"
})

-- quickfix --------------------------------------------------------------------
vim.keymap.set("n", "co", "<cmd>copen<cr>", { desc = "Open quickfix window" })
vim.keymap.set("n", "cc", "<cmd>cclose<cr>", { desc = "Close quickfix window" })
vim.keymap.set("n", "]q", "<cmd>cnext<cr>zz", { desc = "Next quickfix item" })
vim.keymap.set("n", "[q", "<cmd>cprev<cr>zz", { desc = "Previous quickfix item" })

-- netrw -----------------------------------------------------------------------
vim.g.netrw_use_errorwindow = 0
vim.g.netrw_banner = 0
vim.g.netrw_bufsettings = "noma nomod nowrap ro nobl"
vim.g.netrw_fastbrowse = 0

vim.keymap.set("n", "<leader>.", "<cmd>Explore .<cr>",
  { desc = "Explore current working directory" })

local netrw_group = vim.api.nvim_create_augroup("Netrw", {})
vim.api.nvim_create_autocmd("Filetype", {
  group = netrw_group,
  pattern = "netrw",
  desc = "Set keymap netrw buffers",
  callback = function()
    vim.keymap.set("n", "<esc>", "<cmd>Rexplore<cr>", 
      { buffer = true, desc = "Return to/from Explorer" })
  end
})