-- Execute as `nvim --headless -c "luafile ./scripts/update-readme.lua"`
local parsers = require 'nvim-treesitter.parsers'.get_parser_configs()
local sorted_parsers = {}

for k, v in pairs(parsers) do
  table.insert(sorted_parsers, {name = k, parser = v})
end

table.sort(sorted_parsers, function(a, b) return a.name < b.name end)

local generated_text = ''

for _, v in ipairs(sorted_parsers) do
  local link = '['..(v.parser.readme_name or v.name)..']('..v.parser.install_info.url..')'

  if v.parser.maintainers then
    generated_text = generated_text..
      '- [x] '..link..' (maintained by '..table.concat(v.parser.maintainers, ', ')..')\n'
  else
    generated_text = generated_text..
      '- [ ] '..link..'\n'
  end
end

print(generated_text)
print("\n")

local readme_text = table.concat(vim.fn.readfile('README.md'), '\n')

local new_readme_text = string.gsub(readme_text, "<!%-%-parserinfo%-%->.*<!%-%-parserinfo%-%->",
                                                 "<!--parserinfo-->\n"..generated_text.."<!--parserinfo-->")
vim.fn.writefile(vim.fn.split(new_readme_text, '\n'), "README.md")

if string.find(readme_text, generated_text, 1, 'plain') then
  print("README.md is up-to-date!")
  vim.cmd('q')
else
  print("New README.md was written. Please commit that change! Old text was: ")
  print(string.sub(readme_text, string.find(readme_text, "<!%-%-parserinfo%-%->.*<!%-%-parserinfo%-%->")))
  print("\n")
  print('If you see this on CI, please run `nvim --headless -c "luafile ./scripts/update-readme.lua"` '
      ..'locally and commit the changes!')
  vim.cmd('cq')
end