local Plug = vim.fn['plug#']

vim.call('plug#begin')

Plug 'nvim-tree/nvim-web-devicons'
Plug 'nvim-tree/nvim-tree.lua'

Plug 'ellisonleao/gruvbox.nvim'

Plug 'williamboman/mason.nvim'
Plug 'williamboman/mason-lspconfig.nvim'
Plug 'neovim/nvim-lspconfig'

Plug 'hrsh7th/cmp-nvim-lsp'
Plug 'hrsh7th/cmp-buffer'
Plug 'hrsh7th/cmp-path'
Plug 'hrsh7th/cmp-cmdline'
Plug 'hrsh7th/nvim-cmp'

Plug 'nvim-lua/plenary.nvim'
Plug 'nvim-telescope/telescope.nvim'

vim.call('plug#end')

vim.g.loaded_netrw = 1
vim.g.loaded_netrwPlugin = 1

vim.opt.termguicolors = true
vim.o.background = "dark"
require("gruvbox").setup({
  contrast = "hard",
})
vim.cmd("colorscheme gruvbox")

require("mason").setup()
require("mason-lspconfig").setup({
    ensure_installed = {"ts_ls", "gopls"}
})
require("nvim-tree").setup({
  view = {
    number = false,
    relativenumber = false,
  },
  renderer = {
    indent_markers = {
      enable = true,
    },
    icons = {
      show = {
        git = false,
      },
    },
    highlight_git = "name",
    highlight_opened_files = "name",
  },
  filters = {
    dotfiles = false,
  },
  git = {
    ignore = false,
  },
  actions = {
    open_file = {
      quit_on_open = true,
    },
  },
})

-- Global statuscolumn (line 190-ish) bakes in line numbers; nvim-tree doesn't
-- manage statuscolumn itself, so strip it locally for the tree buffer.
-- Must hook BufWinEnter (not FileType): nvim-tree sets 'filetype' on the
-- buffer before moving it into its own split, so a FileType autocmd fires
-- in the wrong window and opt_local misses the tree's actual window.
vim.api.nvim_create_autocmd("BufWinEnter", {
  pattern = "NvimTree_*",
  callback = function()
    vim.opt_local.statuscolumn = ""
  end,
})

vim.opt.number = true
vim.opt.swapfile = true
vim.opt.autoindent = true
vim.opt.shiftwidth = 4
vim.opt.confirm = true

local cmp = require'cmp'

cmp.setup({
  snippet = {
    expand = function(args)
      vim.snippet.expand(args.body) -- native neovim snippets (Neovim v0.10+)
    end,
  },
  window = {
    completion = cmp.config.window.bordered(),
    documentation = cmp.config.window.bordered(),
  },
  mapping = cmp.mapping.preset.insert({
    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<C-e>'] = cmp.mapping.abort(),
    ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
  }),
  sources = cmp.config.sources({
    { name = 'nvim_lsp' },
  }, {
      { name = 'buffer' },
    })
})

-- To use git you need to install the plugin petertriho/cmp-git and uncomment lines below
-- Set configuration for specific filetype.
--[[ cmp.setup.filetype('gitcommit', {
    sources = cmp.config.sources({
      { name = 'git' },
    }, {
      { name = 'buffer' },
    })
 })
 require("cmp_git").setup() ]]-- 

-- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won't work anymore).
cmp.setup.cmdline({ '/', '?' }, {
  mapping = cmp.mapping.preset.cmdline(),
  sources = {
    { name = 'buffer' }
  }
})

-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
cmp.setup.cmdline(':', {
  mapping = cmp.mapping.preset.cmdline(),
  sources = cmp.config.sources({
    { name = 'path' }
  }, {
    { name = 'cmdline' }
  }),
  matching = { disallow_symbol_nonprefix_matching = false }
})

-- Set up lspconfig.
local capabilities = require('cmp_nvim_lsp').default_capabilities()
-- Replace <YOUR_LSP_SERVER> with each lsp server you've enabled.
require('lspconfig')['ts_ls'].setup {
  capabilities = capabilities
}
require('lspconfig')['gopls'].setup {
  capabilities = capabilities
}

-- Format Go files on save using the attached LSP server (gopls).
vim.api.nvim_create_autocmd("BufWritePre", {
  pattern = "*.go",
  callback = function()
    vim.lsp.buf.format()
  end,
})

-- Close any open floating windows (e.g. the hover/signature-help popup).
local function close_floating_windows()
  for _, win in ipairs(vim.api.nvim_list_wins()) do
    if vim.api.nvim_win_get_config(win).relative ~= "" then
      vim.api.nvim_win_close(win, false)
    end
  end
end
vim.keymap.set('n', '<Esc>', close_floating_windows, { noremap = true, silent = true })

-- Give all floating windows (hover, signature-help, diagnostics, etc.) a rounded border.
vim.o.winborder = "rounded"

-- Match floating windows' background to the main editor background.
vim.api.nvim_set_hl(0, "NormalFloat", { link = "Normal" })
vim.api.nvim_set_hl(0, "FloatBorder", { link = "Normal" })

-- LSP keymaps, set up per-buffer whenever a language server attaches.
vim.api.nvim_create_autocmd("LspAttach", {
  callback = function(args)
    local opts = { noremap = true, silent = true, buffer = args.buf }
    vim.keymap.set('n', 'gd', vim.lsp.buf.definition, opts)
    vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, opts)
    vim.keymap.set('n', 'gr', vim.lsp.buf.references, opts)
    vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, opts)
    vim.keymap.set('n', 'K', vim.lsp.buf.hover, opts)
    vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, opts)
    vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, opts)
  end,
})

-- set space as leader keymap
vim.keymap.set('n', ' ', '<Nop>', {noremap = true, silent = true})
vim.g.mapleader = ' '

-- Diagnostic keymaps (not tied to LspAttach; work globally)
vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float, { noremap = true, silent = true })
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, { noremap = true, silent = true })
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, { noremap = true, silent = true })
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { noremap = true, silent = true })

vim.keymap.set('n', '<leader>x', ':NvimTreeToggle<CR>', {noremap = true, silent = true})
vim.keymap.set('n', '<leader>n', ':bnext<CR>', {noremap = true, silent = true})
vim.keymap.set('n', '<leader>p', ':bprevious<CR>', {noremap = true, silent = true})
vim.keymap.set('n', '<leader>d', ':bdelete<CR>', {noremap = true, silent = true})

require('telescope').setup()
local telescopeBuiltin = require('telescope.builtin')
vim.keymap.set('n', '<leader>ff', telescopeBuiltin.find_files, {noremap = true, silent = true})
vim.keymap.set('n', '<leader>fg', telescopeBuiltin.live_grep, {noremap = true, silent = true})
vim.keymap.set('n', '<leader>fb', telescopeBuiltin.buffers, {noremap = true, silent = true})
vim.keymap.set('n', '<leader>fh', telescopeBuiltin.help_tags, {noremap = true, silent = true})

vim.opt.statuscolumn = "%s %3{v:lnum} %-3{v:relnum} "
vim.o.rnu=true