local nvim_lsp = require("lspconfig")
local cmp = require("cmp")

local kind_icons = {
  Text = "",
  Method = "",
  Function = "",
  Constructor = "",
  Field = "",
  Variable = "",
  Class = "ﴯ", Interface = "",
  Module = "",
  Property = "ﰠ",
  Unit = "",
  Value = "",
  Enum = "",
  Keyword = "",
  Snippet = "",
  Color = "",
  File = "",
  Reference = "",
  Folder = "",
  EnumMember = "",
  Constant = "",
  Struct = "",
  Event = "",
  Operator = "",
  TypeParameter = ""
}

cmp.setup({
  snippet = {
    expand = function(args)
      require("luasnip").lsp_expand(args.body)
    end
  },
  mapping = {
    ["<C-j>"] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Select }),
    ["<C-k>"] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Select }),
    ["<C-space>"] = cmp.mapping.complete(),
    ["<CR>"] = cmp.mapping.confirm({ select = true, behavior = cmp.SelectBehavior.Insert }),
    ["<TAB>"] = cmp.mapping.confirm({ select = true, behavior = cmp.SelectBehavior.Insert })
  },
  sources = cmp.config.sources({
    { name = "nvim_lsp" },
    { name = "luasnip" },
    { name = "nvim_lua" }
  }, {
    { name = "path" },
    { name = "buffer" }
  }),
  completion = {
    completeopt = "menu,menuone,noselect,noinsert"
  },
  experimental = {
    ghost_text = true
  },
  sorting = {
    comparators = {
      cmp.config.compare.exact,
      cmp.config.compare.score,
      cmp.config.compare.recently_used,
      cmp.config.compare.kind,
      cmp.config.compare.offset
    }
  },
  documentation = {
    border = { "╭", "─", "╮", "│", "╯", "─", "╰", "│" },
    zindex = 999
  },
  formatting = {
    format = function(entry, vim_item)
      vim_item.kind = string.format('%s %s', kind_icons[vim_item.kind], vim_item.kind)
      vim_item.menu = ({ buffer = "[Buffer]", nvim_lsp = "[LSP]", luasnip = "[Snippet]", nvim_lua = "[Lua]", path = "[File]" })[entry.source.name]
      return vim_item
    end
  }
})

cmp.setup.cmdline("/", {
  sources = {
    { name = "buffer" }
  }
})

cmp.setup.cmdline(":", {
  sources = {
    { name = "path" },
    { name = "cmdline" }
  }
})

local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())

local on_attach = function(_, bufnr)
  require("lsp_signature").on_attach({}, bufnr)
end

local servers = { "tsserver", "pyright" }

for _, server in ipairs(servers) do
  nvim_lsp[server].setup({
    capabilities = capabilities,
    on_attach = on_attach,
    flags = {
      debounce_text_changes = 150
    }
  })
end

nvim_lsp.gopls.setup({
  capabilities = capabilities,
  on_attach = on_attach,
  settings = {
    gopls = {
    }
  }
})

local runtime_path = vim.split(package.path, ';')
table.insert(runtime_path, "lua/?.lua")
table.insert(runtime_path, "lua/?/init.lua")
nvim_lsp.sumneko_lua.setup({
  capabilities = capabilities,
  on_attach = on_attach,
  cmd = { "/sbin/lua-language-server", "-E", "/usr/lib/lua-language-server/main.lua" },
  settings = {
    Lua = {
      runtime = {
        version = "LuaJIT",
        path = runtime_path
      },
      diagnostics = {
        globals = { "vim" }
      },
      workspace = {
        library = vim.api.nvim_get_runtime_file("", true)
      },
      telemetry = {
        enable = false
      }
    }
  }
})

require("luasnip/loaders/from_vscode").lazy_load()

-- Auto formatting
vim.cmd([[autocmd BufWritePre * lua vim.lsp.buf.formatting_sync(nil, 1000)]])
vim.cmd([[autocmd BufWritePre *.ts,*.js,*.jsx,*.tsx,*.py ALEFix]])