local M = {}

local Log = require "lvim.core.log"

local null_ls = require "null-ls"
local services = require "lvim.lsp.null-ls.services"
local method = null_ls.methods.DIAGNOSTICS

local alternative_methods = {
  null_ls.methods.DIAGNOSTICS,
  null_ls.methods.DIAGNOSTICS_ON_OPEN,
  null_ls.methods.DIAGNOSTICS_ON_SAVE,
}

function M.list_registered(filetype)
  local registered_providers = services.list_registered_providers_names(filetype)
  local providers_for_methods = vim.tbl_flatten(vim.tbl_map(function(m)
    return registered_providers[m] or {}
  end, alternative_methods))

  return providers_for_methods
end

function M.list_supported(filetype)
  local s = require "null-ls.sources"
  local supported_linters = s.get_supported(filetype, "diagnostics")
  table.sort(supported_linters)
  return supported_linters
end

function M.setup(linter_configs)
  if vim.tbl_isempty(linter_configs) then
    return
  end

  local registered = services.register_sources(linter_configs, method)

  if #registered > 0 then
    Log:debug("Registered the following linters: " .. unpack(registered))
  end
end

return M