local lsp = require("lsp-zero")

lsp.preset("recommended")

lsp.ensure_installed({
    'tsserver'
})

-- Fix Undefined global 'vim'
lsp.configure('sumneko_lua', {
    settings = {
        Lua = {
            diagnostics = {
                globals = { 'vim' }
            }
        }
    }
})


local cmp = require('cmp')
local cmp_select = { behavior = cmp.SelectBehavior.Select }
local cmp_mappings = lsp.defaults.cmp_mappings({
    ['<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_mappings['<Tab>'] = nil
cmp_mappings['<S-Tab>'] = nil


lsp.setup_nvim_cmp({
    mapping = cmp_mappings
})

lsp.set_preferences({
    suggest_lsp_servers = false,
    sign_icons = {
        error = 'E',
        warn = 'W',
        hint = 'H',
        info = 'I'
    }
})


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>la", function() vim.lsp.buf.code_action() end, opts)
    vim.keymap.set("n", "<leader>lf", function() vim.lsp.buf.format() end, opts)
    vim.keymap.set("n", "<leader>gr", 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)

lsp.skip_server_setup({'rust_analyzer'})
lsp.setup()

vim.diagnostic.config({
    virtual_text = true,
    update_in_insert = false,
    underline = true,
    severity_sort = false,
    float = true,
})

-- rust tools

-- Configure LSP through rust-tools.nvim plugin.
-- rust-tools will configure and enable certain LSP features for us.
-- See https://github.com/simrat39/rust-tools.nvim#configuration
local opts = {
  tools = {
    runnables = {
      use_telescope = true,
    },
    inlay_hints = {
      auto = true,
      show_parameter_hints = false,
      parameter_hints_prefix = "",
      other_hints_prefix = "",
    },
  },

  -- all the opts to send to nvim-lspconfig
  -- these override the defaults set by rust-tools.nvim
  -- see https://github.com/neovim/nvim-lspconfig/blob/master/CONFIG.md#rust_analyzer
  server = {
    -- on_attach is a callback called when the language server attachs to the buffer
    settings = {
      -- to enable rust-analyzer settings visit:
      -- https://github.com/rust-analyzer/rust-analyzer/blob/master/docs/user/generated_config.adoc
      ["rust-analyzer"] = {
        -- enable clippy on save
        checkOnSave = {
          command = "clippy",
        },
      },
    },
  },
}

-- todo: centralize and use the same callback for lspzero and rust-tools
opts.server.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>la", function() vim.lsp.buf.code_action() end, opts)
    vim.keymap.set("n", "<leader>lf", function() vim.lsp.buf.format() end, opts)
    vim.keymap.set("n", "<leader>gr", 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

require("rust-tools").setup(opts)