local opt = vim.opt
local g = vim.g
g.maplocalleader = ";"

opt.foldmethod = "indent"
opt.foldnestmax = 10
opt.foldlevel = 4
opt.signcolumn = "yes"
opt.spelllang = "en,de"
opt.clipboard = "" -- don't just use the system clipboard
opt.wrap = false
opt.breakindent = false
opt.spell = false
opt.list = true
opt.conceallevel = 2
opt.undofile = true
opt.undolevels = 10000
opt.writebackup = false
opt.history = 5000
opt.shada = { "'1000", "<50", "s10", "h" }

-- Tabs and Indents
-- ===

opt.textwidth = 80 -- Text width maximum chars before wrapping
opt.tabstop = 4 -- The number of spaces a tab is
opt.shiftwidth = 4 -- Number of spaces to use in auto(indent)
opt.smarttab = true -- Tab insert blanks according to 'shiftwidth'
opt.autoindent = true -- Use same indenting on new lines
opt.smartindent = true -- Smart autoindenting on new lines
opt.shiftround = true -- Round indent to multiple of 'shiftwidth'

-- Timing
-- ===
opt.ttimeout = true
opt.timeoutlen = 500 -- Time out on mappings
opt.ttimeoutlen = 10 -- Time out on key codes
opt.updatetime = 500 -- Idle time to write swap and trigger CursorHold

-- Searching
-- ===
opt.ignorecase = true -- Search ignoring case
opt.smartcase = true -- Keep case when searching with *
opt.infercase = true -- Adjust case in insert completion mode
opt.incsearch = true -- Incremental search

-- Formatting
-- ===

opt.wrap = false -- No wrap by default
opt.linebreak = true -- Break long lines at 'breakat'
opt.breakat = "\\ \\	;:,!?" -- Long lines break chars
opt.startofline = false -- Cursor in same column for few commands
opt.splitbelow = true -- Splits open bottom right
opt.splitright = true
opt.breakindentopt = { shift = 2, min = 20 }
opt.formatoptions = "qnlmBjp" -- see :h fo-table & :h formatoptions

-- Diff
-- ===

opt.diffopt:append { "iwhite", "indent-heuristic", "algorithm:patience" }
opt.wildmode = "longest:full,full" -- Command-line completion mode

-- Editor UI
-- ===

vim.o.guifont = "FiraCode Nerd Font:h15"
opt.termguicolors = true
opt.shortmess = "xsTOInfFitloCaAs"
opt.showmode = true -- Show mode in cmd window
opt.scrolloff = 2 -- Keep at least n lines above/below
opt.sidescrolloff = 0 -- Keep at least n lines left/right
opt.numberwidth = 2 -- Minimum number of columns to use for the line number
opt.number = true -- Show line numbers
opt.ruler = false -- Default status ruler
opt.list = true -- Show hidden characters

if vim.g.started_by_firenvim == false then
  opt.showtabline = 3 -- Always show the tabs line
  opt.laststatus = 3 -- Always show laststatus
else
  opt.showtabline = 1 -- Don't show tabline in firenvim, unless multitab
  opt.laststatus = 1 -- Don't show laststatus in firenvim
end
opt.helpheight = 0 -- Disable help window resizing
opt.winwidth = 30 -- Minimum width for active window
opt.winminwidth = 1 -- Minimum width for inactive windows
opt.winheight = 1 -- Minimum height for active window
opt.winminheight = 1 -- Minimum height for inactive window

opt.showcmd = false -- show command in status line
opt.cmdheight = 0
opt.cmdwinheight = 5 -- Command-line lines
opt.equalalways = true -- Resize windows on split or close
opt.colorcolumn = "+0" -- Column highlight at textwidth's max character-limit

opt.cursorline = true
opt.cursorlineopt = { "number", "screenline" }

opt.pumheight = 10 -- Maximum number of items to show in the popup menu
opt.pumwidth = 10 -- Minimum width for the popup menu
opt.pumblend = 10 -- Popup blend

-- autocommands
-- ===
local function augroup(name)
  return vim.api.nvim_create_augroup("plex_" .. name, {})
end

-- highlight on yank
vim.api.nvim_create_autocmd("TextYankPost", {
  group = augroup "highlight_yank",
  callback = function()
    vim.highlight.on_yank()
  end,
})

-- Disable conceallevel for specific file-types.
vim.api.nvim_create_autocmd("FileType", {
  group = augroup "fix_conceallevel",
  pattern = { "latex", "tex" },
  callback = function()
    vim.opt_local.conceallevel = 0
  end,
})

-- Resize splits if window got resized
vim.api.nvim_create_autocmd("VimResized", {
  group = augroup "resize_splits",
  callback = function()
    vim.cmd "wincmd ="
  end,
})

-- Wrap and enable spell-checker in text filetypes
vim.api.nvim_create_autocmd("FileType", {
  group = augroup "spell_conceal",
  pattern = { "gitcommit", "markdown", "tex", "latex", "norg" },
  callback = function()
    vim.opt_local.spell = true
    vim.opt_local.conceallevel = 0
  end,
})

-- map resizing for firenvim
if vim.g.started_by_firenvim == true then
  vim.keymap.set("n", "<leader><C-DOWN>", function()
    vim.o.lines = vim.o.lines + 1
  end, { expr = true, desc = "Make Display bigger" })
  vim.keymap.set("n", "<leader><C-UP>", function()
    vim.o.lines = vim.o.lines - 1
  end, { expr = true, desc = "Make Display smaller" })
end