---@class lib.prettier
local M = {}

---@alias ConformCtx {buf: number, filename: string, dirname: string}

M.supported = {
  'css',
  'graphql',
  'handlebars',
  'html',
  'javascript',
  'javascriptreact',
  'json',
  'jsonc',
  'less',
  'markdown',
  'markdown.mdx',
  'scss',
  'typescript',
  'typescriptreact',
  'vue',
  'yaml',
}

---Check if a parser exists for the given context.
---@param ctx ConformCtx
function M.has_parser(ctx)
  local ft = vim.bo[ctx.buf].filetype --[[@as string]]

  -- Default filetypes are always supported.
  if vim.tbl_contains(M.supported, ft) then
    return true
  end

  -- Otherwise, check if a parser can be inferred.
  local inferred = vim.fn.system({ 'prettier', '--file-info', ctx.filename })

  ---@type boolean, string?
  local ok, parser = pcall(function()
    return vim.fn.json_decode(inferred).inferredParser
  end)

  return ok and parser and parser ~= vim.NIL
end

---Check if a Prettier config file exists in the current context.
---@param ctx ConformCtx
function M.has_config(ctx)
  vim.fn.system({ 'prettier', '--find-config-path', ctx.filename })

  return vim.v.shell_error == 0
end

return M