local f = io.popen("uname -s")
if (f ~= nil) then
    MY_OS = f:read("*a")
    MY_OS = string.gsub(MY_OS, "%s+", "")
    f:close()
end

if (MY_OS == 'Linux')
then
    -- on Linux
    vim.opt.guicursor = ""

    --vim.opt.spelllang = 'en_gb'
    --vim.opt.spell = true

    vim.opt.nu = true
    vim.opt.relativenumber = true

    vim.opt.tabstop = 4
    vim.opt.softtabstop = 4
    vim.opt.shiftwidth = 4
    vim.opt.expandtab = true

    vim.opt.smartindent = true

    vim.opt.wrap = true
    -- Fonts
    vim.opt.encoding = "utf-8"
    vim.opt.guifont = "FiraCodeNerdFont-Regular:h10"

    vim.opt.swapfile = false
    vim.opt.backup = false
    vim.opt.undodir = os.getenv("HOME") .. "/.vim/undodir"
    vim.opt.undofile = true

    vim.opt.hlsearch = false
    vim.opt.incsearch = true

    -- disable netrw at the very start of your init.lua
    vim.g.loaded_netrw = 1
    vim.g.loaded_netrwPlugin = 1

    -- optionally enable 24-bit colour
    vim.opt.termguicolors = true

    vim.opt.scrolloff = 8
    vim.opt.signcolumn = "yes"
    vim.opt.isfname:append("@-@")

    vim.opt.updatetime = 50

    vim.opt.colorcolumn = "110"

    -- LSP options
    vim.diagnostic.config({
        virtual_text = false
    })

    -- Show line diagnostics automatically in hover window
    vim.o.updatetime = 250
    vim.cmd [[autocmd CursorHold,CursorHoldI * lua vim.diagnostic.open_float(nil, {focus=false})]]

    -- Vimtex options:
    vim.g.vimtex_view_method = "zathura"
    vim.g.vimtex_general_viewer = "zathura"
    vim.g.vimtex_quickfix_mode = 0

    -- Ignore mappings
    vim.g.vimtex_mappings_enabled = 1

    ---- Auto Indent
    vim.g["vimtex_indent_enabled"] = 1

    ---- Syntax highlighting
    vim.g.vimtex_syntax_enabled = 0

    -- Error suppression:
    vim.g.vimtex_log_ignore = ({
        "Underfull",
        "Overfull",
        "specifier changed to",
        "Token not allowed in a PDF string",
    })

    -- Python provider
    vim.g.python3_host_prog = "/usr/share/pyenv/shims/python"

elseif (MY_OS == 'FreeBSD') or (MY_OS == 'OpenBSD')
then
    -- on BSD
    vim.opt.guicursor = ""

    vim.opt.spelllang = 'en_gb'
    vim.opt.spell = true

    vim.opt.nu = true
    vim.opt.relativenumber = true

    vim.opt.tabstop = 4
    vim.opt.softtabstop = 4
    vim.opt.shiftwidth = 4
    vim.opt.expandtab = true

    vim.opt.smartindent = true

    vim.opt.wrap = true
    -- Fonts
    vim.opt.encoding = "utf-8"
    vim.opt.guifont = "FiraCodeNerdFont-Regular:h10"

    vim.opt.swapfile = false
    vim.opt.backup = false
    vim.opt.undodir = os.getenv("HOME") .. "/.vim/undodir"
    vim.opt.undofile = true

    vim.opt.hlsearch = false
    vim.opt.incsearch = true

    -- disable netrw at the very start of your init.lua
    vim.g.loaded_netrw = 1
    vim.g.loaded_netrwPlugin = 1

    -- optionally enable 24-bit colour
    vim.opt.termguicolors = true

    vim.opt.scrolloff = 8
    vim.opt.signcolumn = "yes"
    vim.opt.isfname:append("@-@")

    vim.opt.updatetime = 50

    vim.opt.colorcolumn = "110"

    -- LSP options
    vim.diagnostic.config({
        virtual_text = false
    })

    -- Show line diagnostics automatically in hover window
    vim.o.updatetime = 250
    vim.cmd [[autocmd CursorHold,CursorHoldI * lua vim.diagnostic.open_float(nil, {focus=false})]]

    -- Vimtex options:
    vim.g.vimtex_view_method = "zathura"
    vim.g.vimtex_general_viewer = "zathura"
    vim.g.vimtex_quickfix_mode = 0

    -- OBSD options
    --vim.g.vimtex_compiler_latexmk={ 'cmd': '' }

    -- Ignore mappings
    vim.g.vimtex_mappings_enabled = 1

    ---- Auto Indent
    vim.g["vimtex_indent_enabled"] = 1

    ---- Syntax highlighting
    vim.g.vimtex_syntax_enabled = 0

    -- Error suppression:
    vim.g.vimtex_log_ignore = ({
        "Underfull",
        "Overfull",
        "specifier changed to",
        "Token not allowed in a PDF string",
    })

    -- Python provider
    vim.g.python3_host_prog = "/usr/local/share/pyenv/shims/python"

elseif (MY_OS == 'Darwin')
then
    -- on MacOS
    vim.opt.guicursor = ""

    -- vim.opt.spelllang = 'en_gb'
    -- vim.opt.spell = true

    vim.opt.nu = true
    vim.opt.relativenumber = true

    vim.opt.tabstop = 4
    vim.opt.softtabstop = 4
    vim.opt.shiftwidth = 4
    vim.opt.expandtab = true

    vim.opt.smartindent = true

    vim.opt.wrap = true
    -- Fonts
    vim.opt.encoding = "utf-8"

    -- Undo
    vim.opt.swapfile = false
    vim.opt.backup = false
    vim.opt.undodir = os.getenv("HOME") .. "/.vim/undodir"
    vim.opt.undofile = true

    vim.opt.hlsearch = false
    vim.opt.incsearch = true

    -- disable netrw at the very start of your init.lua
    vim.g.loaded_netrw = 1
    vim.g.loaded_netrwPlugin = 1

    -- optionally enable 24-bit colour
    -- vim.opt.termguicolors = true

    -- Folds
    vim.opt.foldmethod = "expr"
    vim.opt.foldexpr = "v:lua.vim.treesitter.foldexpr()"
    vim.opt.foldcolumn = "0"
    vim.opt.foldtext = ""
    vim.opt.foldlevel = 99
    vim.opt.foldlevelstart = 1
    vim.opt.foldnestmax = 4

    vim.opt.scrolloff = 8
    vim.opt.signcolumn = "yes"
    vim.opt.isfname:append("@-@")

    vim.opt.updatetime = 50

    vim.opt.colorcolumn = "110"

    -- LSP options
    vim.diagnostic.config({
        virtual_text = false
    })

    -- Show line diagnostics automatically in hover window
    vim.o.updatetime = 250
    vim.cmd [[autocmd CursorHold,CursorHoldI * lua vim.diagnostic.open_float(nil, {focus=false})]]

    -- Vimtex options:
    vim.g.vimtex_view_method = "sioyek"
    vim.g.vimtex_view_sioyek_exe = "/Applications/sioyek.app/Contents/MacOS/sioyek"
    vim.g.vimtex_quickfix_mode = 0

    -- Ignore mappings
    vim.g.vimtex_mappings_enabled = 1

    ---- Auto Indent
    vim.g.vimtex_indent_enabled = 1

    ---- Syntax highlighting
    vim.g.vimtex_syntax_enabled = 0

    -- Error suppression:
    vim.g.vimtex_log_ignore = ({
        "Underfull",
        "Overfull",
        "specifier changed to",
        "Token not allowed in a PDF string",
    })

    -- Python provider
    vim.g.python3_host_prog = "$HOME/.pyenv/shims/python"
else
    print('Should never be here LSP')
end