-- development/tests/test-config.lua — dump the Neovim client's
-- `initialization_options` payload for two scenarios (default config and a
-- representative multi-wiki sample) as deterministic `key=value` lines.
--
-- The runner (test-config.sh) diffs the output against
-- development/tests/config-expected.txt. The Vim harness
-- (test-config-vim.vim) emits byte-identical lines against the SAME golden,
-- so "nvim == golden" and "vim == golden" together prove the two clients
-- send the same server-bound config — i.e. Vim/Neovim config parity.
--
-- Only the server-relevant keys are emitted (wiki_root, file_extension,
-- syntax, log_level, wikis[*]). `mappings`/`folding` are client-side
-- concerns the server ignores, so they're intentionally excluded.

local out = assert(os.getenv('NUWIKI_CONFIG_OUT'), 'NUWIKI_CONFIG_OUT unset')

local config = require('nuwiki.config')
local lsp = require('nuwiki.lsp')

local lines = {}
local function emit(s)
  lines[#lines + 1] = s
end

local function dump(payload)
  emit('wiki_root=' .. tostring(payload.wiki_root))
  emit('file_extension=' .. tostring(payload.file_extension))
  emit('syntax=' .. tostring(payload.syntax))
  emit('log_level=' .. tostring(payload.log_level))
  if payload.diagnostic then
    emit('diagnostic.link_severity=' .. tostring(payload.diagnostic.link_severity))
  end
  if payload.wikis then
    for i, w in ipairs(payload.wikis) do
      local keys = {}
      for k in pairs(w) do
        keys[#keys + 1] = k
      end
      table.sort(keys)
      for _, k in ipairs(keys) do
        emit(string.format('wikis[%d].%s=%s', i - 1, k, tostring(w[k])))
      end
    end
  end
end

-- Scenario 1: defaults (no user config, no VimL globals).
vim.g.nuwiki_wikis = nil
config.apply({})
emit('[default]')
dump(lsp.init_options())

-- Scenario 2: representative config exercising scalar keys + a wikis list.
config.apply({
  wiki_root = '/tmp/base',
  file_extension = '.md',
  syntax = 'vimwiki',
  log_level = 'debug',
  diagnostic = { link_severity = 'error' },
  wikis = {
    {
      name = 'personal',
      root = '/tmp/personal',
      file_extension = '.wiki',
      index = 'home',
      diary_rel_path = 'journal',
    },
    { name = 'work', root = '/tmp/work' },
  },
})
emit('[sample]')
dump(lsp.init_options())

local f = assert(io.open(out, 'w'))
f:write(table.concat(lines, '\n') .. '\n')
f:close()

vim.cmd('qa!')