local ok, lsp = pcall(require, 'lspconfig')
if not ok then
    return
end

local sign = function(opts)
    -- See :help sign_define()
    vim.fn.sign_define(opts.name, {
        texthl = opts.name,
        text = opts.text,
        numhl = ''
    })
end

sign({name = 'DiagnosticSignError', text = '✘'})
sign({name = 'DiagnosticSignWarn', text = '▲'})
sign({name = 'DiagnosticSignHint', text = '⚑'})
sign({name = 'DiagnosticSignInfo', text = ''})

vim.diagnostic.config({
    virtual_text = false,
    severity_sort = true,
    float = {
        border = 'rounded',
        source = 'always',
        header = '',
        prefix = '',
    },
})

vim.lsp.handlers['textDocument/hover'] = vim.lsp.with(
vim.lsp.handlers.hover,
{border = 'rounded'}
)

vim.lsp.handlers['textDocument/signatureHelp'] = vim.lsp.with(
vim.lsp.handlers.signature_help,
{border = 'rounded'}
)

vim.lsp.handlers["workspace/diagnostic/refresh"] = function(_, _, ctx)
    local ns = vim.lsp.diagnostic.get_namespace(ctx.client_id)
    pcall(vim.diagnostic.reset, ns)
    return true
end

require("lsp-format").setup {}

local on_attach = function(client)
    local bufmap = function(mode, lhs, rhs)
        local opts = {buffer = true}
        vim.keymap.set(mode, lhs, rhs, opts)
    end
    require("lsp-format").on_attach(client)

    bufmap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<cr>')
    bufmap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<cr>')
    bufmap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<cr>')
    bufmap('n', 'go', '<cmd>lua vim.lsp.buf.type_definition()<cr>')
    bufmap('n', 'gs', '<cmd>lua vim.lsp.buf.signature_help()<cr>')
    bufmap('n', 'gA', '<cmd>Telescope diagnostics<cr>')
    bufmap('n', 'gr', '<cmd>Telescope lsp_references<cr>')
    bufmap('n', 'gi', '<cmd>Telescope lsp_implementations<cr>')
    bufmap('n', '<F2>', '<cmd>lua vim.lsp.buf.rename()<cr>')
    bufmap('n', '<F3>', '<cmd>lua vim.lsp.buf.format({async = true})<cr>')
    bufmap('n', '<F4>', '<cmd>lua vim.lsp.buf.code_action()<cr>')
    bufmap('x', '<F4>', '<cmd>lua vim.lsp.buf.range_code_action()<cr>')
    bufmap('n', 'gl', '<cmd>lua vim.diagnostic.open_float()<cr>')
    bufmap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev()<cr>')
    bufmap('n', ']d', '<cmd>lua vim.diagnostic.goto_next()<cr>')
end

lsp.gopls.setup { on_attach = on_attach }
lsp.clangd.setup { on_attach = on_attach }
lsp.ltex.setup { on_attach = on_attach }
lsp.svelte.setup { on_attach = on_attach }
lsp.tsserver.setup { on_attach = on_attach }
lsp.lua_ls.setup {
    settings = {
        Lua = {
            diagnostics = {
                globals = { 'vim' }
            },
            -- workspace = {
            --     library = vim.api.nvim_get_runtime_file("", true),
            -- },
            -- telemetry = {
            --     enable = false,
            -- },
        }
    },
    on_attach = on_attach
}