-- Author        : swytch
-- Created       : Saturday Sept. 11, 2021 22:12:33 CET
-- License       : GPLv3
-- Description   : nvim-lsp-installer plugin config file

local lsp_installer = require("nvim-lsp-installer")

lsp_installer.settings {
    ui = {
        icons = {
            server_installed = "✓",
            server_pending = "o",
            server_uninstalled = "x"
        }
    }
}

local servers = {
        "clangd",
	"sumneko_lua",
}

for _, name in ipairs(servers) do
	local ok, server = lsp_installer.get_server(name)
	-- Check that the server is supported in nvim-lsp-installer
	if ok then
		if not server:is_installed() then
			print("Installing " .. name)
			server:install()
		end
	end
end

local lsp_root_path = vim.fn.stdpath("data") .. "/lsp_servers/"
local runtime_path = vim.split(package.path, ';')
table.insert(runtime_path, "lua/?.lua")
table.insert(runtime_path, "lua/?/init.lua")
local enhance_server_opts = {
        ["clangd"] = function(opts)
                opts.settings = {
                        cmd = { lsp_root_path .. "clangd/clangd/bin/clangd",
                                "--background-index",
                                "--suggest-missing-includes",
                                "--clang-tidy",
                                "--header-insertion=iwyu"
                        },
                }
        end,
        ["sumneko_lua"] = function(opts)
                opts.settings = {
                        cmd = { lsp_root_path
                                .. "sumneko_lua/extension/server/bin/"
                                .. "lua-language-server",
                                "-E",
                                lsp_root_path
                                .. "sumneko_lua/extension/server/main.lua"
                        },
                        settings = {
                                Lua = {
                                        runtime = {
                                        -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
                                                version = 'LuaJIT',
                                                -- Setup your lua path
                                                path = runtime_path,
                                        },
                                        diagnostics = {
                                                -- Get the language server to recognize the `vim` global
                                                globals = {
                                                        "vim",
                                                        "use",
                                                        "globals",
                                                        "utils"
                                                },
                                        },
                                        workspace = {
                                                -- Make the server aware of Neovim runtime files
                                                library =
                                                        vim.api.nvim_get_runtime_file("", true),
                                        },
                                        -- Do not send telemetry data containing a randomized but unique identifier
                                        telemetry = {
                                                enable = false,
                                        },
                                },
                        },
                }
        end,
}

local on_attach = function(_, bufnr)
        local opts = { buffer = bufnr }
        vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, opts)
        vim.keymap.set('n', 'gd', vim.lsp.buf.definition, opts)
        vim.keymap.set('n', 'K', vim.lsp.buf.hover, opts)
        vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, opts)
        vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, opts)
        vim.keymap.set('n', '<leader>wa',
                vim.lsp.buf.add_workspace_folder, opts)
        vim.keymap.set('n', '<leader>wr',
                vim.lsp.buf.remove_workspace_folder, opts)
        vim.keymap.set('n', '<leader>wl', function()
                vim.inspect(vim.lsp.buf.list_workspace_folders())
        end, opts)
        vim.keymap.set('n', '<leader>D', vim.lsp.buf.type_definition, opts)
        vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, opts)
        vim.keymap.set('n', 'gr', vim.lsp.buf.references, opts)
        vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, opts)
        vim.keymap.set('n', '<leader>so',
                require('telescope.builtin').lsp_document_symbols, opts)
        vim.api.nvim_create_user_command("Format", vim.lsp.buf.formatting, {})
end

-- nvim-cmp supports additional completion capabilities
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require("cmp_nvim_lsp").update_capabilities(capabilities)

lsp_installer.on_server_ready(function(server)
  -- Specify the default options which we'll use to setup all servers
        local opts = {
                on_attach = on_attach,
                capabilities = capabilities,
        }

        if enhance_server_opts[server.name] then
                -- Enhance the default opts with the server-specific ones
                enhance_server_opts[server.name](opts)
        end

        server:setup(opts)
end)