local joinpath = vim.fs.joinpath
local cache = tostring(vim.fn.stdpath("cache"))
local option_table = {
    -- Use utf-8 to overall encoding.
    encoding = "utf-8",

    -- Use utf-8 when file write.
    fileencoding = "utf-8",

    -- Use file encodings when loaded.
    fileencodings = { "utf-8", "sjis", "iso-2022-jp", "euc-jp" },

    -- Automatic line feed code recognition.
    fileformats = { "unix", "dos", "mac" },

    -- backup.
    backup = true,
    backupdir = joinpath(cache, "backup"),

    -- swapfile.
    swapfile = true,
    directory = joinpath(cache, "swap"),

    -- UNDOをどうぞ
    undodir = joinpath(cache, "undo"),
    undofile = true,

    grepprg = [[rg --vimgrep --no-heading $*]],
    grepformat = [[%f:%l:%c:%m]],

    -- 早くなるんか…？
    ttyfast = true,

    -- East asia ambiguous character width problem.
    ambiwidth = "single",

    autoread = true,

    -- Use the clipboard on linux systems.
    clipboard = "unnamedplus",

    diffopt = "vertical,algorithm:histogram,indent-heuristic",

    -- For pum.vim
    shortmess = "c",

    -- jump momentarily to a matching parenthesis
    showmatch = true,
    matchtime = 1,

    -- disable wildmode
    wildchar = 0,
    wildcharm = 0,
    wildmenu = false,

    -- Display rows number.
    number = true,

    -- Display relative rows number.
    relativenumber = true,

    -- Display current row cursorline.
    cursorline = true,

    -- disable ruler display.
    ruler = false,

    -- Smart indent.
    smartindent = true,
    autoindent = true,

    -- Insert tab with half-width space.
    expandtab = true,

    -- The amount of blank space to insert with each command or smart indent.
    shiftwidth = 2,

    -- Tab width with 2 spaces.
    tabstop = 2,

    -- Insert a tab with 2 minutes of half-width space.
    softtabstop = 2,

    -- Highlight search results
    hlsearch = true,

    -- Incremental search.
    -- Search starts when you enter the first character of the search word.
    incsearch = true,

    -- Search is not case sensitive
    ignorecase = true,

    -- Searching in lowercase ignores uppercase and lowercase
    smartcase = true,

    -- When the search progresses to the end of the file, search again from the beginning of the file.
    wrapscan = true,

    history = 100,

    -- Invisible characters
    list = true,

    -- Tab/End line Space/End line/No brake space.
    listchars = {
        tab = "»-",
        space = "･",
        trail = "･",
        nbsp = "%",
        eol = "↲",
        extends = "»",
        precedes = "«",
    },
}

for option_key, option_value in pairs(option_table) do
    if vim.regex([[diffopt\|shortmess]]):match_str(option_key) then
        vim.opt[option_key]:append(option_value)
    else
        vim.opt[option_key] = option_value
    end
end

-- Disable default plugins
-- Fast Startup Settings!!
local disable_pluings = {
    -- Disable TOhtml.
    "loaded_2html_plugin",

    -- Disable archive file open and browse.
    "loaded_gzip",
    "loaded_tar",
    "loaded_tarPlugin",
    "loaded_zip",
    "loaded_zipPlugin",

    -- Disable vimball.
    "loaded_vimball",
    "loaded_vimballPlugin",

    -- Disable netrw plugins.
    "loaded_netrw",
    "loaded_netrwPlugin",
    "loaded_netrwSettings",
    "loaded_netrwFileHandlers",

    -- Disable `GetLatestVimScript`.
    "loaded_getscript",
    "loaded_getscriptPlugin",

    -- Disable other plugins
    "loaded_man",
    "loaded_matchit",
    "loaded_matchparen",
    "loaded_shada_plugin",
    "loaded_spellfile_plugin",
    "loaded_tutor_mode_plugin",
    "did_install_default_menus",
    "did_install_syntax_menu",
    "skip_loading_mswin",
    "did_indent_on",
    "loaded_rrhelper",

    -- Disable neovim language api providers
    "loaded_python3_provider",
    "loaded_node_provider",
    "loaded_perl_provider",
    "loaded_ruby_provider",
}

for _, disable_plugin in pairs(disable_pluings) do
    vim.g[disable_plugin] = true
end