local lsp = require("lsp-zero")

lsp.preset("recommended")


local cmp = require('cmp')

local cmp_select = {behavior = cmp.SelectBehavior.Select}
local cmp_mappings = cmp.mapping.preset.insert({
  ['<C-p>'] = cmp.mapping.select_prev_item(cmp_select),
  ['<C-n>'] = cmp.mapping.select_next_item(cmp_select),
  ['<C-y>'] = cmp.mapping.confirm({ select = true }),
  ["<C-Space>"] = cmp.mapping.complete(),
})

cmp.setup({
	mapping = cmp_mappings
})

lsp.on_attach(function(client, bufnr)
  local opts = {buffer = bufnr, remap = false}

  vim.keymap.set("n", "gd", function() vim.lsp.buf.definition() end, opts)
  vim.keymap.set("n", "K", function() vim.lsp.buf.hover() end, opts)
  vim.keymap.set("n", "<leader>vws", function() vim.lsp.buf.workspace_symbol() end, opts)
  vim.keymap.set("n", "<leader>vd", function() vim.diagnostic.open_float() end, opts)
  vim.keymap.set("n", "[d", function() vim.diagnostic.goto_next() end, opts)
  vim.keymap.set("n", "]d", function() vim.diagnostic.goto_prev() end, opts)
  vim.keymap.set("n", "<leader>vca", function() vim.lsp.buf.code_action() end, opts)
  vim.keymap.set("n", "<leader>vrr", function() vim.lsp.buf.references() end, opts)
  vim.keymap.set("n", "<leader>vrn", function() vim.lsp.buf.rename() end, opts)
  vim.keymap.set("i", "<C-h>", function() vim.lsp.buf.signature_help() end, opts)
end)

-- to learn how to use mason.nvim with lsp-zero
-- read this: https://github.com/VonHeikemen/lsp-zero.nvim/blob/v3.x/doc/md/guides/integrate-with-mason-nvim.md
require('mason').setup({})
require('mason-lspconfig').setup({
  ensure_installed = {},
  handlers = {
    lsp.default_setup,
  },
})

lsp.setup()