---@brief
---
--- https://github.com/Myriad-Dreamin/tinymist
--- An integrated language service for Typst [taɪpst]. You can also call it "微霭" [wēi ǎi] in Chinese.
---
--- Currently some of Tinymist's workspace commands are supported, namely:
--- `LspTinymistExportSvg`, `LspTinymistExportPng`, `LspTinymistExportPdf
--- `LspTinymistExportMarkdown`, `LspTinymistExportText`, `LspTinymistExportQuery`,
--- `LspTinymistExportAnsiHighlight`, `LspTinymistGetServerInfo`,
--- `LspTinymistGetDocumentTrace`, `LspTinymistGetWorkspaceLabels`, and
--- `LspTinymistGetDocumentMetrics`.

---@param command_name string
---@param client vim.lsp.Client
---@param bufnr integer
---@return fun():nil run_tinymist_command, string cmd_name, string cmd_desc
local function create_tinymist_command(command_name, client, bufnr)
  local export_type = command_name:match 'tinymist%.export(%w+)'
  local info_type = command_name:match 'tinymist%.(%w+)'
  if info_type and info_type:match '^get' then
    info_type = info_type:gsub('^get', 'Get')
  end
  local cmd_display = export_type or info_type
  ---@return nil
  local function run_tinymist_command()
    local arguments = { vim.api.nvim_buf_get_name(bufnr) }
    local title_str = export_type and ('Export ' .. cmd_display) or cmd_display
    ---@type lsp.Handler
    local function handler(err, res)
      if err then
        return vim.notify(err.code .. ': ' .. err.message, vim.log.levels.ERROR)
      end
      -- If exporting, show the string result; else, show the table for inspection
      vim.notify(export_type and res or vim.inspect(res), vim.log.levels.INFO)
    end
    return client:exec_cmd({
      title = title_str,
      command = command_name,
      arguments = arguments,
    }, { bufnr = bufnr }, handler)
  end
  -- Construct a readable command name/desc
  local cmd_name = export_type and ('TinymistExport' .. cmd_display) or ('Tinymist' .. cmd_display) ---@type string
  local cmd_desc = export_type and ('Export to ' .. cmd_display) or ('Get ' .. cmd_display) ---@type string
  return run_tinymist_command, cmd_name, cmd_desc
end

---@type vim.lsp.Config
return {
  cmd = { 'tinymist' },
  filetypes = { 'typst' },
  root_markers = { '.git' },
  on_attach = function(client, bufnr)
    for _, command in ipairs {
      'tinymist.exportSvg',
      'tinymist.exportPng',
      'tinymist.exportPdf',
      -- 'tinymist.exportHtml', -- Use typst 0.13
      'tinymist.exportMarkdown',
      'tinymist.exportText',
      'tinymist.exportQuery',
      'tinymist.exportAnsiHighlight',
      'tinymist.getServerInfo',
      'tinymist.getDocumentTrace',
      'tinymist.getWorkspaceLabels',
      'tinymist.getDocumentMetrics',
    } do
      local cmd_func, cmd_name, cmd_desc = create_tinymist_command(command, client, bufnr)
      vim.api.nvim_buf_create_user_command(bufnr, 'Lsp' .. cmd_name, cmd_func, { nargs = 0, desc = cmd_desc })
    end
  end,
}