local api = vim.api


local M = {}


local function string_to_lines_table(ascii)
  local lines = {}
  local line_start = 1
  for i = 1, #ascii do
    if string.sub(ascii, i, i) == '\n' then
      local this_line = string.sub(ascii, line_start, i - 1)
      line_start = i + 1
      table.insert(lines, this_line)
    end
  end
  return lines
end

M['added_neovim_1'] = [[
.__   __.  _______   ______   ____    ____  __  .___  ___.
|  \ |  | |   ____| /  __  \  \   \  /   / |  | |   \/   |
|   \|  | |  |__   |  |  |  |  \   \/   /  |  | |  \  /  |
|  . `  | |   __|  |  |  |  |   \      /   |  | |  |\/|  |
|  |\   | |  |____ |  `--'  |    \    /    |  | |  |  |  |
|__| \__| |_______| \______/      \__/     |__| |__|  |__|

]]

M['default_ascii_1'] = [[
  _   _        __      _______ __  __
 | \ | |       \ \    / /_   _|  \/  |
 |  \| | ___  __\ \  / /  | | | \  / |
 | . ` |/ _ \/ _ \ \/ /   | | | |\/| |
 | |\  |  __/ (_) \  /   _| |_| |  | |
 |_| \_|\___|\___/ \/   |_____|_|  |_|

]]

M['default_ascii_2'] = [[
   /‾| /‾/__  ____|‾|  /‾(_)___ ___
  /  |/ / _ \/ __ \ | / / / __ `__ \
 / /|  /  __/ /_/ / |/ / / / / / / /
/_/ |_/\___/\____/|___/_/_/ /_/ /_/
]]

M['neovim_is_awesome'] = [[
 _   _                 _             _        ___
| \ | |               (_)           (_)      / _ \
|  \| | ___  _____   ___ _ __ ___    _ ___  / /_\ \_      _____  ___  ___  _ __ ___   ___
| . ` |/ _ \/ _ \ \ / / | '_ ` _ \  | / __| |  _  \ \ /\ / / _ \/ __|/ _ \| '_ ` _ \ / _ \
| |\  |  __/ (_) \ V /| | | | | | | | \__ \ | | | |\ V  V /  __/\__ \ (_) | | | | | |  __/
\_| \_/\___|\___/ \_/ |_|_| |_| |_| |_|___/ \_| |_/ \_/\_/ \___||___/\___/|_| |_| |_|\___|
]]

M['neovim_wetletter'] = [[
 .-. .-.,---.   .---..-.   .-.,-.
 |  \| || .-'  / .-. )\ \ / / |(||\    /|
 |   | || `-.  | | |(_)\ V /  (_)|(\  / |
 | |\  || .-'  | | | |  ) /   | |(_)\/  |
 | | |)||  `--.\ `-' / (_)    | || \  / |
 /(  (_)/( __.' )---'         `-'| |\/| |
(__)   (__)    (_)               '-'  '-'
]]

M['neovim_varsity'] = [[ ____  _____                         _
|_   \|_   _|                       (_)
  |   \ | |  .---.   .--.   _   __  __   _ .--..--.
  | |\ \| | / /__\\/ .'`\ \[ \ [  ][  | [ `.-. .-. |
 _| |_\   |_| \__.,| \__. | \ \/ /  | |  | | | | | |
|_____|\____|'.__.' '.__.'   \__/  [___][___||__||__]

]]

M['neovim_twisted'] = [[
  __   __    _____   _____     _     _   __    __    __
 /_/\ /\_\ /\_____\ ) ___ (   /_/\ /\_\ /\_\  /_/\  /\_\
 ) ) \ ( (( (_____// /\_/\ \  ) ) ) ( ( \/_/  ) ) \/ ( (
/_/   \ \_\\ \__\ / /_/ (_\ \/_/ / \ \_\ /\_\/_/ \  / \_\
\ \ \   / // /__/_\ \ )_/ / /\ \ \_/ / // / /\ \ \\// / /
 )_) \ (_(( (_____\\ \/_\/ /  \ \   / /( (_(  )_) )( (_(
 \_\/ \/_/ \/_____/ )_____(    \_\_/_/  \/_/  \_\/  \/_/

]]

M['neovim_this'] = [[
 ▄▀▀▄ ▀▄  ▄▀▀█▄▄▄▄  ▄▀▀▀▀▄   ▄▀▀▄ ▄▀▀▄  ▄▀▀█▀▄    ▄▀▀▄ ▄▀▄
█  █ █ █ ▐  ▄▀   ▐ █      █ █   █    █ █   █  █  █  █ ▀  █
▐  █  ▀█   █▄▄▄▄▄  █      █ ▐  █    █  ▐   █  ▐  ▐  █    █
  █   █    █    ▌  ▀▄    ▄▀    █   ▄▀      █       █    █
▄▀   █    ▄▀▄▄▄▄     ▀▀▀▀       ▀▄▀     ▄▀▀▀▀▀▄  ▄▀   ▄▀
█    ▐    █    ▐                       █       █ █    █
▐         ▐                            ▐       ▐ ▐    ▐

]]

M['neovim_sweet'] = [[
                                         .-.
 ___ .-.     .--.     .--.    ___  ___  ( __)  ___ .-. .-.
(   )   \   /    \   /    \  (   )(   ) (''") (   )   '   \
 |  .-. .  |  .-. ; |  .-. ;  | |  | |   | |   |  .-.  .-. ;
 | |  | |  |  | | | | |  | |  | |  | |   | |   | |  | |  | |
 | |  | |  |  |/  | | |  | |  | |  | |   | |   | |  | |  | |
 | |  | |  |  ' _.' | |  | |  | |  | |   | |   | |  | |  | |
 | |  | |  |  .'.-. | '  | |  ' '  ; '   | |   | |  | |  | |
 | |  | |  '  `-' / '  `-' /   \ `' /    | |   | |  | |  | |
(___)(___)  `.__.'   `.__.'     '_.'    (___) (___)(___)(___)

]]

M['neovim_swampland'] = [[
 ___   __    ______   ______   __   __   ________  ___ __ __
/__/\ /__/\ /_____/\ /_____/\ /_/\ /_/\ /_______/\/__//_//_/\
\::\_\\  \ \\::::_\/_\:::_ \ \\:\ \\ \ \\__.::._\/\::\| \| \ \
 \:. `-\  \ \\:\/___/\\:\ \ \ \\:\ \\ \ \  \::\ \  \:.      \ \
  \:. _    \ \\::___\/_\:\ \ \ \\:\_/.:\ \ _\::\ \__\:.\-/\  \ \
   \. \`-\  \ \\:\____/\\:\_\ \ \\ ..::/ //__\::\__/\\. \  \  \ \
    \__\/ \__\/ \_____\/ \_____\/ \___/_( \________\/ \__\/ \__\/

]]

M['neovim_srelif'] = [[
__/\\\\\_____/\\\______________________________________________________________________
 _\/\\\\\\___\/\\\______________________________________________________________________
  _\/\\\/\\\__\/\\\_____________________________________________/\\\_____________________
   _\/\\\//\\\_\/\\\_____/\\\\\\\\______/\\\\\_____/\\\____/\\\_\///_____/\\\\\__/\\\\\___
    _\/\\\\//\\\\/\\\___/\\\/////\\\___/\\\///\\\__\//\\\__/\\\___/\\\__/\\\///\\\\\///\\\_
     _\/\\\_\//\\\/\\\__/\\\\\\\\\\\___/\\\__\//\\\__\//\\\/\\\___\/\\\_\/\\\_\//\\\__\/\\\_
      _\/\\\__\//\\\\\\_\//\\///////___\//\\\__/\\\____\//\\\\\____\/\\\_\/\\\__\/\\\__\/\\\_
       _\/\\\___\//\\\\\__\//\\\\\\\\\\__\///\\\\\/______\//\\\_____\/\\\_\/\\\__\/\\\__\/\\\_
        _\///_____\/////____\//////////_____\/////_________\///______\///__\///___\///___\///__

]]

M['neovim_poison'] = [[

@@@  @@@  @@@@@@@@   @@@@@@   @@@  @@@  @@@  @@@@@@@@@@
@@@@ @@@  @@@@@@@@  @@@@@@@@  @@@  @@@  @@@  @@@@@@@@@@@
@@!@!@@@  @@!       @@!  @@@  @@!  @@@  @@!  @@! @@! @@!
!@!!@!@!  !@!       !@!  @!@  !@!  @!@  !@!  !@! !@! !@!
@!@ !!@!  @!!!:!    @!@  !@!  @!@  !@!  !!@  @!! !!@ @!@
!@!  !!!  !!!!!:    !@!  !!!  !@!  !!!  !!!  !@!   ! !@!
!!:  !!!  !!:       !!:  !!!  :!:  !!:  !!:  !!:     !!:
:!:  !:!  :!:       :!:  !:!   ::!!:!   :!:  :!:     :!:
 ::   ::   :: ::::  ::::: ::    ::::     ::  :::     ::
::    :   : :: ::    : :  :      :      :     :      :

]]

M['neovim_serifcap'] = [[
 _  _  ___   __  _  _  __  __  __
( \( )(  _) /  \( )( )(  )(  \/  )
 )  (  ) _)( () )\\//  )(  )    (
(_)\_)(___) \__/ (__) (__)(_/\/\_)

]]

M['neovim_sblood'] = [[
 @@@  @@@ @@@@@@@@  @@@@@@  @@@  @@@ @@@ @@@@@@@@@@
 @@!@!@@@ @@!      @@!  @@@ @@!  @@@ @@! @@! @@! @@!
 @!@@!!@! @!!!:!   @!@  !@! @!@  !@! !!@ @!! !!@ @!@
 !!:  !!! !!:      !!:  !!!  !: .:!  !!: !!:     !!:
 ::    :  : :: :::  : :. :     ::    :    :      :

]]

M['neovim_script'] = [[
 , _
/|/ \                 o
 |   |   _   __           _  _  _
 |   |  |/  /  \_|  |_|  / |/ |/ |
 |   |_/|__/\__/  \/  |_/  |  |  |_/

]]

M['location'] = {
  center = function(width, height, ascii_col, ascii_lines)
    local h = math.floor((height / 2) - (ascii_lines / 2))
    local w = math.floor((width / 2) - (ascii_col / 2))
    return w, h
  end
}

local function str_repeat(str, number)
  local s = ""
  for _ = 1, number do
    s = s .. str
  end
  return s
end

M['set_background_ascii'] = function(ascii)
  local height = vim.api.nvim_get_option('lines')
  local width = vim.api.nvim_get_option('columns')
  local lines = string_to_lines_table(ascii)
  local ascii_col = #lines[1]
  local ascii_lines = #lines
  local start_col, start_row = M.location.center(width, height, ascii_col, ascii_lines)
  if vim.fn.argc() < 1 then
    local buf = vim.api.nvim_create_buf(true, true)
    for i, _ in ipairs(lines) do
      lines[i] = (str_repeat(' ', start_col)) .. (lines[i])
    end
    local new_lines = {}
    for _ = 1, start_row do
      table.insert(new_lines, '')
    end
    for _, l in ipairs(lines) do
      table.insert(new_lines, l)
    end
    vim.api.nvim_buf_set_lines(buf, 0, -1, false, new_lines)
    vim.api.nvim_buf_set_option(buf, 'modifiable', false)
    vim.api.nvim_buf_set_option(buf, 'buflisted', false)
    local win = api.nvim_get_current_win()
    api.nvim_set_current_buf(buf)
  end
end

return M