local configs = require 'lspconfig/configs'
local util = require 'lspconfig/util'
local lsp = vim.lsp

local texlab_build_status = vim.tbl_add_reverse_lookup {
  Success = 0;
  Error = 1;
  Failure = 2;
  Cancelled = 3;
}

local function buf_build(bufnr)
  bufnr = util.validate_bufnr(bufnr)
  local params = { textDocument = { uri = vim.uri_from_bufnr(bufnr) }  }
  lsp.buf_request(bufnr, 'textDocument/build', params,
      function(err, _, result, _)
        if err then error(tostring(err)) end
        print("Build "..texlab_build_status[result.status])
      end)
end

-- bufnr isn't actually required here, but we need a valid buffer in order to
-- be able to find the client for buf_request.
-- TODO find a client by looking through buffers for a valid client?
-- local function build_cancel_all(bufnr)
--   bufnr = util.validate_bufnr(bufnr)
--   local params = { token = "texlab-build-*" }
--   lsp.buf_request(bufnr, 'window/progress/cancel', params, function(err, method, result, client_id)
--     if err then error(tostring(err)) end
--     print("Cancel result", vim.inspect(result))
--   end)
-- end

configs.texlab = {
  default_config = {
    cmd = {"texlab"};
    filetypes = {"tex", "bib"};
    root_dir = vim.loop.os_homedir;
    settings = {
      latex = {
        build = {
          args = {"-pdf", "-interaction=nonstopmode", "-synctex=1"};
          executable = "latexmk";
          onSave = false;
        };
        forwardSearch = {
          args = {};
          executable = nil;
          onSave = false;
        };
        lint = {
          onChange = false;
        };
      };
      bibtex = {
        formatting = {
          lineLength = 120
        };
      };
    };
  };
  commands = {
    TexlabBuild = {
      function()
        buf_build(0)
      end;
      description = "Build the current buffer";
    };
  };
  docs = {
    description = [[
https://texlab.netlify.com/

A completion engine built from scratch for (La)TeX.

See https://texlab.netlify.com/docs/reference/configuration for configuration options.
]];
    default_config = {
      root_dir = "vim's starting directory";
    };
  };
}

configs.texlab.buf_build = buf_build
-- vim:et ts=2 sw=2