local misc = require("core.misc")
local lsp = require("core.lsp.functions")
local map = misc.map

return { "williamboman/mason-lspconfig.nvim",
  requires = {
    "williamboman/mason.nvim",
    { "neovim/nvim-lspconfig",
      disable = not vim.fn.has("nvim-0.8.0"),
      function()
        lsp.setup()
      end
    },

    -- these two update some lsp capabilities and therefore must be run first
    -- "hrsh7th/cmp-nvim-lsp",
    -- "kevinhwang91/nvim-ufo"
  },
  function()
    local lspconfig = require("lspconfig")
    local util = require("lspconfig.util")

    -- setup language servers
    require("mason-lspconfig").setup {
      ensure_installed = {
        "lua_ls",
        "clangd",
        "jdtls",
        "phpactor",
        "html",
        "cssls",
        "bashls",
        "zls"
        -- "asm-lsp", -- seems to be broken
      },

      -- setup all handlers
      handlers = {
        function(server_name)
          lspconfig[server_name].setup {}
        end,

        -- setup luals
        ["lua_ls"] = function(server_name)
          local root_files = { ".luarc.json", ".luarc.jsonc", ".luacheckrc",
            ".stylua.toml", "stylua.toml", "selene.toml", "selene.yml",
            "README.md"
          }

          -- FIXME: luals seems to start up twice and sends back twice the
          -- completions (one configured with the below settings and one without)
          lspconfig[server_name].setup {
            settings = {
              Lua = {
                diagnostics = {
                  globals = { "vim", "mp" }
                },
                runtime = {
                  version = "LuaJIT"
                },
                format = {
                  enable = false
                },
                workspace = {
                  checkThirdParty = false,
                  library = {
                    vim.env.VIMRUNTIME
                  }
                }
              }
            },

            root_dir = function(fname)
              local root = util.root_pattern(unpack(root_files))(fname)
              if root and root ~= vim.env.HOME then
                return root
              end

              root = util.root_pattern("lua/")(fname)
              if root then
                return root
              end
              return util.find_git_ancestor(fname)
            end
          }
        end,

        -- setup clangd
        ["clangd"] = function(server_name)
          lspconfig[server_name].setup {
            on_attach = function(client, bufnr)
              -- add some clangd specific mappings
              local opts = { buffer = bufnr }
              map("n", "<leader>o", "<cmd>ClangdSwitchSourceHeader<CR>", opts)
            end,

            cmd = {
              "clangd",
              "--background-index",
              "--clang-tidy",
              "--header-insertion=iwyu",
              "--completion-style=detailed",
              "--function-arg-placeholders",
              "--fallback-style=llvm"
            },
            init_options = {
              usePlaceholders = true,
              clangdFileStatus = true,
              fallback_flags = {
                "-xc" -- makes clangd think we"re using c instead of c++
              }
            }
          }
        end,

        -- disable it, we start this using nvim-jdtls
        ["jdtls"] = function(_) end,

        -- setup basedpyright
        ["basedpyright"] = function(server_name)
          lspconfig[server_name].setup {
            on_attach = function(client, bufnr)
              -- add some basedpyright specific mappings
              local opts = { buffer = bufnr }
              map("n", "cri", "<cmd>PyrightOrganizeImports<CR>", opts)
            end,
          }
        end
      },

      ["openscad_lsp"] = function(server_name)
        lspconfig[server_name].setup {}
      end
    }
  end
}