nvim.lua

-- Install packer
local install_path = vim.fn.stdpath 'data' .. '/site/pack/packer/start/packer.nvim'
local is_bootstrap = false
if vim.fn.empty(vim.fn.glob(install_path)) > 0 then
  is_bootstrap = true
  vim.fn.execute('!git clone https://github.com/wbthomason/packer.nvim ' .. install_path)
  vim.cmd [[packadd packer.nvim]]
end

require('packer').startup(function(use)
  -- Package manager
  use 'wbthomason/packer.nvim'

  use { -- LSP Configuration & Plugins
    'neovim/nvim-lspconfig',
    requires = {
      -- Automatically install LSPs to stdpath for neovim
      'williamboman/mason.nvim',
      'williamboman/mason-lspconfig.nvim',
    },
  }

  -- Useful status updates for LSP
  use {
    'j-hui/fidget.nvim',
    tag = 'legacy',
    config = function()
      require("fidget").setup {}
    end,
  }

  use { -- Autocompletion
    'hrsh7th/nvim-cmp',
    requires = { 'hrsh7th/cmp-nvim-lsp', 'L3MON4D3/LuaSnip', 'saadparwaiz1/cmp_luasnip' },
  }

  use { -- Highlight, edit, and navigate code
    'nvim-treesitter/nvim-treesitter',
    run = function()
      pcall(require('nvim-treesitter.install').update { with_sync = true })
    end,
  }

  use { -- Additional text objects via treesitter
    'nvim-treesitter/nvim-treesitter-textobjects',
    after = 'nvim-treesitter',
  }
  use('nvim-treesitter/playground')
  use('mbbill/undotree')

  -- Git related plugins
  use 'tpope/vim-fugitive' -- git
  use 'tpope/vim-rhubarb' -- hub
  use 'lewis6991/gitsigns.nvim' -- blame

  -- theme
  use 'Mofiqul/vscode.nvim'

  use 'nvim-lualine/lualine.nvim' -- Fancier statusline
  use {'lukas-reineke/indent-blankline.nvim', main = 'ibl', opts = {}} -- Add indentation guides even on blank lines
  use 'numToStr/Comment.nvim' -- "gc" to comment visual regions/lines
  use 'tpope/vim-sleuth' -- Detect tabstop and shiftwidth automatically

  -- Fuzzy Finder (files, lsp, etc)
  use { 'nvim-telescope/telescope.nvim', branch = '0.1.x', requires = { 'nvim-lua/plenary.nvim' } }

  -- Fuzzy Finder Algorithm which requires local dependencies to be built. Only load if `make` is available
  use { 'nvim-telescope/telescope-fzf-native.nvim', run = 'make', cond = vim.fn.executable 'make' == 1 }

  -- Toggle Terminal
  use {"akinsho/toggleterm.nvim", tag = "*" }

  -- Suggest which key to use
  use {
    "folke/which-key.nvim", config = function()
      require("which-key").setup{}
    end
  }

  -- Auto pair
  use {
    "windwp/nvim-autopairs", config = function()
      require("nvim-autopairs").setup{}
    end
  }

  -- -- Inlay hints
  -- use {
  --   "lvimuser/lsp-inlayhints.nvim", config = function()
  --     require("lsp-inlayhints").setup()
  --   end
  -- }

  -- Add custom plugins to packer from ~/.config/nvim/lua/custom/plugins.lua
  local has_plugins, plugins = pcall(require, 'custom.plugins')
  if has_plugins then
    plugins(use)
  end

  if is_bootstrap then
    require('packer').sync()
  end
end)

-- When we are bootstrapping a configuration, it doesn't
-- make sense to execute the rest of the init.lua.
--
-- You'll need to restart nvim, and then it will work.
if is_bootstrap then
  print '=================================='
  print '    Plugins are being installed'
  print '    Wait until Packer completes,'
  print '       then restart nvim'
  print '=================================='
  return
end

-- Automatically source and re-compile packer whenever you save this init.lua
local packer_group = vim.api.nvim_create_augroup('Packer', { clear = true })
vim.api.nvim_create_autocmd('BufWritePost', {
  command = 'source <afile> | PackerCompile',
  group = packer_group,
  pattern = vim.fn.expand '$MYVIMRC',
})

-- [[ Setting options ]]
-- See `:help vim.o`

-- Set highlight on search
vim.o.hlsearch = true
vim.o.incsearch = true

-- Make line numbers default
vim.wo.number = true
vim.wo.relativenumber = true

-- Enable mouse mode
vim.o.mouse = 'a'

-- Clipboard ("+" && "*")
vim.opt.clipboard:append 'unnamedplus'

-- Cursor
vim.o.cursorline = true
vim.o.cursorcolumn = false
vim.o.colorcolumn = '80,100'

-- Indent
vim.o.tabstop = 4
vim.o.softtabstop = 0  -- do NOT mix up tab and space
vim.o.shiftwidth = 4
vim.o.expandtab = true
vim.o.smartindent = true
vim.o.cindent = true

-- listchars
vim.o.list = true
vim.o.listchars = [[tab:»·,extends:❯,precedes:❮,nbsp:±,trail:…]]

-- Save undo history
vim.o.swapfile = false
vim.o.backup = false
vim.o.undofile = true
vim.o.undodir = os.getenv("HOME") .. "/.config/nvim/undodir"

-- Case insensitive searching UNLESS /C or capital in search
vim.o.ignorecase = true
vim.o.smartcase = true

-- Decrease update time
vim.o.updatetime = 250
vim.wo.signcolumn = 'yes'

-- Set colorscheme
vim.o.termguicolors = true

-- Set completeopt to have a better completion experience
vim.o.completeopt = 'menuone,noselect'

-- Set scroll
vim.o.scrolloff = 8
vim.o.signcolumn = "yes"

-- spell check
vim.o.spelllang = "en"

-- [[ Basic Keymaps ]]
-- Set <space> as the leader key
-- See `:help mapleader`
--  NOTE: Must happen before plugins are required (otherwise wrong leader will be used)
vim.g.mapleader = ' '
vim.g.maplocalleader = ' '

-- Keymaps for better default experience
-- See `:help vim.keymap.set()`
vim.keymap.set({ 'n', 'v' }, '<Space>', '<Nop>', { silent = true })

-- Remap for dealing with word wrap
vim.keymap.set('n', 'k', "v:count == 0 ? 'gk' : 'k'", { expr = true, silent = true })
vim.keymap.set('n', 'j', "v:count == 0 ? 'gj' : 'j'", { expr = true, silent = true })

-- explore
vim.keymap.set("n", "<leader>ee", vim.cmd.Ex)

-- select and move
vim.keymap.set("v", "J", ":m '>+1<CR>gv=gv")
vim.keymap.set("v", "K", ":m '<-2<CR>gv=gv")

-- replace
vim.keymap.set("x", "<leader>p", [["_dP]])

-- copy to system clipboard
vim.keymap.set({"n", "v"}, "<leader>y", [["*y]])
vim.keymap.set("n", "<leader>Y", [["+Y]])

-- [[ Highlight on yank ]]
-- See `:help vim.highlight.on_yank()`
local highlight_group = vim.api.nvim_create_augroup('YankHighlight', { clear = true })
vim.api.nvim_create_autocmd('TextYankPost', {
  callback = function()
    vim.highlight.on_yank()
  end,
  group = highlight_group,
  pattern = '*',
})

-- Set lualine as statusline
-- See `:help lualine.txt`
require('lualine').setup {
  options = {
    icons_enabled = false,
    theme = 'vscode',
    component_separators = '|',
    section_separators = '',
  },
  sections = {
    lualine_c = {
      {
        'filename',
        file_status = true,
        newfile_status = true,
        path = 1,
      },
    },
  },
}

-- Enable Comment.nvim
require('Comment').setup()

-- Theme
require('vscode').setup({
    style = 'light',
    italic_comments = true,
    underline_links = true,
    transparent = true,
})
vim.cmd.colorscheme "vscode"

-- Enable `lukas-reineke/indent-blankline.nvim`
-- See `:help indent_blankline.txt`
vim.opt.list = true
vim.opt.listchars:append "space:⋅"
vim.opt.listchars:append "eol:↴"
-- colors
require('ibl').setup()

-- Gitsigns
-- See `:help gitsigns.txt`
require('gitsigns').setup {
  signs = {
    add = { text = '+' },
    change = { text = '~' },
    delete = { text = '_' },
    topdelete = { text = '‾' },
    changedelete = { text = '~' },
  },
  current_line_blame = true,
}

-- [[ Configure Telescope ]]
-- See `:help telescope` and `:help telescope.setup()`
require('telescope').setup {
  defaults = {
    mappings = {
      i = {
        ['<C-u>'] = false,
        ['<C-d>'] = false,
      },
    },
  },
}

-- Enable telescope fzf native, if installed
pcall(require('telescope').load_extension, 'fzf')

-- See `:help telescope.builtin`
vim.keymap.set('n', '<leader>?', require('telescope.builtin').oldfiles, { desc = '[?] Find recently opened files' })
vim.keymap.set('n', '<leader><space>', require('telescope.builtin').buffers, { desc = '[ ] Find existing buffers' })
vim.keymap.set('n', '<leader>/', function()
  -- You can pass additional configuration to telescope to change theme, layout, etc.
  require('telescope.builtin').current_buffer_fuzzy_find(require('telescope.themes').get_dropdown {
    winblend = 10,
    previewer = false,
  })
end, { desc = '[/] Fuzzily search in current buffer]' })

vim.keymap.set('n', '<leader>sf', require('telescope.builtin').find_files, { desc = '[S]earch [F]iles' })
vim.keymap.set('n', '<leader>re', require('telescope.builtin').resume, { desc = '[RE]sume last search buffer' })
vim.keymap.set('n', '<leader>sh', require('telescope.builtin').help_tags, { desc = '[S]earch [H]elp' })
vim.keymap.set('n', '<leader>sw', require('telescope.builtin').grep_string, { desc = '[S]earch current [W]ord' })
vim.keymap.set('n', '<leader>sg', require('telescope.builtin').live_grep, { desc = '[S]earch by [G]rep' })
vim.keymap.set('n', '<leader>sd', require('telescope.builtin').diagnostics, { desc = '[S]earch [D]iagnostics' })

-- [[ Configure Treesitter ]]
-- See `:help nvim-treesitter`
require('nvim-treesitter.configs').setup {
  -- Add languages to be installed here that you want installed for treesitter
  ensure_installed = { 'python' },

  highlight = { enable = true },
  indent = { enable = true },
  incremental_selection = {
    enable = true,
    keymaps = {
      init_selection = '<c-space>',
      node_incremental = '<c-space>',
      scope_incremental = '<c-s>',
      node_decremental = '<c-backspace>',
    },
  },
  textobjects = {
    select = {
      enable = true,
      lookahead = true, -- Automatically jump forward to textobj, similar to targets.vim
      keymaps = {
        -- You can use the capture groups defined in textobjects.scm
        ['aa'] = '@parameter.outer',
        ['ia'] = '@parameter.inner',
        ['af'] = '@function.outer',
        ['if'] = '@function.inner',
        ['ac'] = '@class.outer',
        ['ic'] = '@class.inner',
      },
    },
    move = {
      enable = true,
      set_jumps = true, -- whether to set jumps in the jumplist
      goto_next_start = {
        [']m'] = '@function.outer',
        [']]'] = '@class.outer',
      },
      goto_next_end = {
        [']M'] = '@function.outer',
        [']['] = '@class.outer',
      },
      goto_previous_start = {
        ['[m'] = '@function.outer',
        ['[['] = '@class.outer',
      },
      goto_previous_end = {
        ['[M'] = '@function.outer',
        ['[]'] = '@class.outer',
      },
    },
    swap = {
      enable = true,
      swap_next = {
        ['<leader>a'] = '@parameter.inner',
      },
      swap_previous = {
        ['<leader>A'] = '@parameter.inner',
      },
    },
  },
}

-- Diagnostic keymaps
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev)
vim.keymap.set('n', ']d', vim.diagnostic.goto_next)
vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float)
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist)

-- LSP settings.
--  This function gets run when an LSP connects to a particular buffer.
local on_attach = function(_, bufnr)
  -- NOTE: Remember that lua is a real programming language, and as such it is possible
  -- to define small helper and utility functions so you don't have to repeat yourself
  -- many times.
  --
  -- In this case, we create a function that lets us more easily define mappings specific
  -- for LSP related items. It sets the mode, buffer and description for us each time.
  local nmap = function(keys, func, desc)
    if desc then
      desc = 'LSP: ' .. desc
    end

    vim.keymap.set('n', keys, func, { buffer = bufnr, desc = desc })
  end

  nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
  nmap('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')

  nmap('gd', vim.lsp.buf.definition, '[G]oto [D]efinition')
  nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
  nmap('gi', vim.lsp.buf.implementation, '[G]oto [I]mplementation')
  nmap('<leader>D', vim.lsp.buf.type_definition, 'Type [D]efinition')
  nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
  nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

  -- See `:help K` for why this keymap
  nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
  nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')

  -- Lesser used LSP functionality
  nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
  nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
  nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
  nmap('<leader>wl', function()
    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
  end, '[W]orkspace [L]ist Folders')

  -- Create a command `:Format` local to the LSP buffer
  vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
    if vim.lsp.buf.format then
      vim.lsp.buf.format()
    elseif vim.lsp.buf.formatting then
      vim.lsp.buf.formatting()
    end
  end, { desc = 'Format current buffer with LSP' })
end

-- Setup mason so it can manage external tooling
require('mason').setup()

-- Enable the following language servers
-- Feel free to add/remove any LSPs that you want here. They will automatically be installed
local servers = { }

-- Ensure the servers above are installed
require('mason-lspconfig').setup {
  ensure_installed = servers,
}

-- nvim-cmp supports additional completion capabilities
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)

for _, lsp in ipairs(servers) do
  require('lspconfig')[lsp].setup {
    on_attach = on_attach,
    capabilities = capabilities,
  }
end

-- Example custom configuration for lua
--
-- Make runtime files discoverable to the server
local runtime_path = vim.split(package.path, ';')
table.insert(runtime_path, 'lua/?.lua')
table.insert(runtime_path, 'lua/?/init.lua')

-- nvim-cmp setup
local cmp = require 'cmp'
local luasnip = require 'luasnip'
local autopairs = require 'nvim-autopairs.completion.cmp'

cmp.event:on(
  'confirm_done',
  autopairs.on_confirm_done()
)

cmp.setup {
  snippet = {
    expand = function(args)
      luasnip.lsp_expand(args.body)
    end,
  },
  mapping = cmp.mapping.preset.insert {
    ['<C-d>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<CR>'] = cmp.mapping.confirm {
      behavior = cmp.ConfirmBehavior.Replace,
      select = true,
    },
    ['<Tab>'] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_next_item()
      elseif luasnip.expand_or_jumpable() then
        luasnip.expand_or_jump()
      else
        fallback()
      end
    end, { 'i', 's' }),
    ['<S-Tab>'] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_prev_item()
      elseif luasnip.jumpable(-1) then
        luasnip.jump(-1)
      else
        fallback()
      end
    end, { 'i', 's' }),
  },
  sources = {
    { name = 'nvim_lsp' },
    { name = 'luasnip' },
  },
}

require("toggleterm").setup({
  open_mapping = [[<A-f>]],
})

-- restore cursor position
-- borrowed from https://github.com/neovim/neovim/issues/16339#issuecomment-1348133829
local ignore_buftype = { "quickfix", "nofile", "help" }
local ignore_filetype = { "gitcommit", "gitrebase", "svn", "hgcommit" }

local function run()
  if vim.tbl_contains(ignore_buftype, vim.bo.buftype) then
    return
  end

  if vim.tbl_contains(ignore_filetype, vim.bo.filetype) then
    -- reset cursor to first line
    vim.cmd[[normal! gg]]
    return
  end

  -- If a line has already been specified on the command line, we are done
  --   nvim file +num
  if vim.fn.line(".") > 1 then
    return
  end

  local last_line = vim.fn.line([['"]])
  local buff_last_line = vim.fn.line("$")

  -- If the last line is set and the less than the last line in the buffer
  if last_line > 0 and last_line <= buff_last_line then
    local win_last_line = vim.fn.line("w$")
    local win_first_line = vim.fn.line("w0")
    -- Check if the last line of the buffer is the same as the win
    if win_last_line == buff_last_line then
      -- Set line to last line edited
      vim.cmd[[normal! g`"]]
      -- Try to center
    elseif buff_last_line - last_line > ((win_last_line - win_first_line) / 2) - 1 then
      vim.cmd[[normal! g`"zz]]
    else
      vim.cmd[[normal! G'"<c-e>]]
    end
  end
end

vim.api.nvim_create_autocmd({'BufWinEnter', 'FileType'}, {
  group    = vim.api.nvim_create_augroup('nvim-lastplace', {}),
  callback = run
})

-- The line beneath this is called `modeline`. See `:help modeline`
-- vim: ts=2 sts=2 sw=2 et