vim.g.mapleader = ' '
vim.g.maplocalleader = ' '

vim.g.have_nerd_font = true

vim.opt.number = true

vim.opt.relativenumber = true

vim.opt.mouse = 'a'

vim.opt.showmode = false

vim.opt.clipboard = 'unnamedplus'

vim.opt.breakindent = true

vim.opt.undofile = true

vim.opt.ignorecase = true
vim.opt.smartcase = true

vim.opt.signcolumn = 'yes'

vim.opt.updatetime = 250

vim.opt.timeoutlen = 300

vim.opt.splitright = true
vim.opt.splitbelow = true

vim.opt.list = true
vim.opt.listchars = { tab = '» ', trail = '·', nbsp = '␣' }

vim.opt.inccommand = 'split'

vim.opt.cursorline = true

vim.opt.scrolloff = 10

vim.opt.hlsearch = true
vim.keymap.set('n', '<Esc>', '<cmd>nohlsearch<CR>')

vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, { desc = 'Go to previous [D]iagnostic message' })
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, { desc = 'Go to next [D]iagnostic message' })
vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float, { desc = 'Show diagnostic [E]rror messages' })
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagnostic [Q]uickfix list' })

vim.keymap.set('t', '<Esc><Esc>', '<C-\\><C-n>', { desc = 'Exit terminal mode' })

vim.keymap.set('n', '<C-h>', '<C-w><C-h>', { desc = 'Move focus to the left window' })
vim.keymap.set('n', '<C-l>', '<C-w><C-l>', { desc = 'Move focus to the right window' })
vim.keymap.set('n', '<C-j>', '<C-w><C-j>', { desc = 'Move focus to the lower window' })
vim.keymap.set('n', '<C-k>', '<C-w><C-k>', { desc = 'Move focus to the upper window' })

vim.api.nvim_create_autocmd('TextYankPost', {
  desc = 'Highlight when yanking (copying) text',
  group = vim.api.nvim_create_augroup('kickstart-highlight-yank', { clear = true }),
  callback = function()
    vim.highlight.on_yank()
  end,
})

local lazypath = vim.fn.stdpath 'data' .. '/lazy/lazy.nvim'
if not vim.loop.fs_stat(lazypath) then
  local lazyrepo = 'https://github.com/folke/lazy.nvim.git'
  vim.fn.system { 'git', 'clone', '--filter=blob:none', '--branch=stable', lazyrepo, lazypath }
end
vim.opt.rtp:prepend(lazypath)

require('lazy').setup({

  'tpope/vim-sleuth',

  { 'numToStr/Comment.nvim', opts = {} },

  {
    'lewis6991/gitsigns.nvim',
    opts = {
      signs = {
        add = { text = '+' },
        change = { text = '~' },
        delete = { text = '_' },
        topdelete = { text = '‾' },
        changedelete = { text = '~' },
      },
    },
  },

  {
    'folke/which-key.nvim',
    event = 'VimEnter',
    config = function()
      require('which-key').setup()

      require('which-key').register {
        ['<leader>c'] = { name = '[C]ode', _ = 'which_key_ignore' },
        ['<leader>d'] = { name = '[D]ocument', _ = 'which_key_ignore' },
        ['<leader>r'] = { name = '[R]ename', _ = 'which_key_ignore' },
        ['<leader>p'] = { name = '[P]roject Telescope', _ = 'which_key_ignore' },
        ['<leader>w'] = { name = '[W]orkspace', _ = 'which_key_ignore' },
      }
    end,
  },

  {
    'nvim-telescope/telescope.nvim',
    event = 'VimEnter',
    branch = '0.1.x',
    dependencies = {
      'nvim-lua/plenary.nvim',
      {
        'nvim-telescope/telescope-fzf-native.nvim',

        build = 'make',

        cond = function()
          return vim.fn.executable 'make' == 1
        end,
      },
      { 'nvim-telescope/telescope-ui-select.nvim' },

      { 'nvim-tree/nvim-web-devicons', enabled = vim.g.have_nerd_font },
    },
    config = function()

      require('telescope').setup {

        extensions = {
          ['ui-select'] = {
            require('telescope.themes').get_dropdown(),
          },
        },
      }

      pcall(require('telescope').load_extension, 'fzf')
      pcall(require('telescope').load_extension, 'ui-select')

      local builtin = require 'telescope.builtin'
      vim.keymap.set('n', '<leader>ph', builtin.help_tags, { desc = '[S]earch [H]elp' })
      vim.keymap.set('n', '<leader>pk', builtin.keymaps, { desc = '[S]earch [K]eymaps' })
      vim.keymap.set('n', '<leader>pf', builtin.find_files, { desc = '[S]earch [F]iles' })
      vim.keymap.set('n', '<leader>ps', builtin.builtin, { desc = '[S]earch [S]elect Telescope' })
      vim.keymap.set('n', '<leader>pw', builtin.grep_string, { desc = '[S]earch current [W]ord' })
      vim.keymap.set('n', '<leader>pg', builtin.live_grep, { desc = '[S]earch by [G]rep' })
      vim.keymap.set('n', '<leader>pd', builtin.diagnostics, { desc = '[S]earch [D]iagnostics' })
      vim.keymap.set('n', '<leader>pr', builtin.resume, { desc = '[S]earch [R]esume' })
      vim.keymap.set('n', '<leader>p.', builtin.oldfiles, { desc = '[S]earch Recent Files ("." for repeat)' })
      vim.keymap.set('n', '<leader><leader>', builtin.buffers, { desc = '[ ] Find existing buffers' })

      vim.keymap.set('n', '<leader>/', function()

        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>s/', function()
        builtin.live_grep {
          grep_open_files = true,
          prompt_title = 'Live Grep in Open Files',
        }
      end, { desc = '[S]earch [/] in Open Files' })

      vim.keymap.set('n', '<leader>sn', function()
        builtin.find_files { cwd = vim.fn.stdpath 'config' }
      end, { desc = '[S]earch [N]eovim files' })
    end,
  },

  {
    'neovim/nvim-lspconfig',
    dependencies = {

      'williamboman/mason.nvim',
      'williamboman/mason-lspconfig.nvim',
      'WhoIsSethDaniel/mason-tool-installer.nvim',

      { 'j-hui/fidget.nvim', opts = {} },

      { 'folke/neodev.nvim', opts = {} },
    },
    config = function()

      vim.api.nvim_create_autocmd('LspAttach', {
        group = vim.api.nvim_create_augroup('kickstart-lsp-attach', { clear = true }),
        callback = function(event)

          local map = function(keys, func, desc)
            vim.keymap.set('n', keys, func, { buffer = event.buf, desc = 'LSP: ' .. desc })
          end

          map('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')

          map('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')

          map('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')

          map('<leader>D', require('telescope.builtin').lsp_type_definitions, 'Type [D]efinition')

          map('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')

          map('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

          map('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')

          map('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')

          map('K', vim.lsp.buf.hover, 'Hover Documentation')

          map('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')

          local client = vim.lsp.get_client_by_id(event.data.client_id)
          if client and client.server_capabilities.documentHighlightProvider then
            vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
              buffer = event.buf,
              callback = vim.lsp.buf.document_highlight,
            })

            vim.api.nvim_create_autocmd({ 'CursorMoved', 'CursorMovedI' }, {
              buffer = event.buf,
              callback = vim.lsp.buf.clear_references,
            })
          end
        end,
      })

      local capabilities = vim.lsp.protocol.make_client_capabilities()
      capabilities = vim.tbl_deep_extend('force', capabilities, require('cmp_nvim_lsp').default_capabilities())

      local servers = {
        clangd = {},
        pyright = {},
        rust_analyzer = {},
        tsserver = {},
        lua_ls = {

          settings = {
            Lua = {
              completion = {
                callSnippet = 'Replace',
              },

            },
          },
        },
      }

      require('mason').setup()

      local ensure_installed = vim.tbl_keys(servers or {})
      vim.list_extend(ensure_installed, {
        'stylua',
      })
      require('mason-tool-installer').setup { ensure_installed = ensure_installed }

      require('mason-lspconfig').setup {
        handlers = {
          function(server_name)
            local server = servers[server_name] or {}

            server.capabilities = vim.tbl_deep_extend('force', {}, capabilities, server.capabilities or {})
            require('lspconfig')[server_name].setup(server)
          end,
        },
      }
    end,
  },

  {
    'stevearc/conform.nvim',
    lazy = false,
    keys = {
      {
        '<leader>f',
        function()
          require('conform').format { async = true, lsp_fallback = true }
        end,
        mode = '',
        desc = '[F]ormat buffer',
      },
    },
    opts = {
      notify_on_error = false,
      format_on_save = function(bufnr)

        local disable_filetypes = { c = true, cpp = true }
        return {
          timeout_ms = 500,
          lsp_fallback = not disable_filetypes[vim.bo[bufnr].filetype],
        }
      end,
      formatters_by_ft = {
        lua = { 'stylua' },

      },
    },
  },

  {
    'hrsh7th/nvim-cmp',
    event = 'InsertEnter',
    dependencies = {

      {
        'L3MON4D3/LuaSnip',
        build = (function()

          if vim.fn.has 'win32' == 1 or vim.fn.executable 'make' == 0 then
            return
          end
          return 'make install_jsregexp'
        end)(),
        dependencies = {

        },
      },
      'saadparwaiz1/cmp_luasnip',

      'hrsh7th/cmp-nvim-lsp',
      'hrsh7th/cmp-path',
    },
    config = function()

      local cmp = require 'cmp'
      local luasnip = require 'luasnip'
      luasnip.config.setup {}

      cmp.setup {
        snippet = {
          expand = function(args)
            luasnip.lsp_expand(args.body)
          end,
        },
        completion = { completeopt = 'menu,menuone,noinsert' },

        mapping = cmp.mapping.preset.insert {

          ['<C-n>'] = cmp.mapping.select_next_item(),

          ['<C-p>'] = cmp.mapping.select_prev_item(),

          ['<C-b>'] = cmp.mapping.scroll_docs(-4),
          ['<C-f>'] = cmp.mapping.scroll_docs(4),

          ['<C-y>'] = cmp.mapping.confirm { select = true },

          ['<C-Space>'] = cmp.mapping.complete {},

          ['<C-l>'] = cmp.mapping(function()
            if luasnip.expand_or_locally_jumpable() then
              luasnip.expand_or_jump()
            end
          end, { 'i', 's' }),
          ['<C-h>'] = cmp.mapping(function()
            if luasnip.locally_jumpable(-1) then
              luasnip.jump(-1)
            end
          end, { 'i', 's' }),

        },
        sources = {
          { name = 'nvim_lsp' },
          { name = 'luasnip' },
          { name = 'path' },
        },
      }
    end,
  },

  {

    'folke/tokyonight.nvim',
    priority = 1000,
    init = function()

      vim.cmd.colorscheme 'tokyonight-night'

      vim.cmd.hi 'Comment gui=none'
    end,
  },

  { 'folke/todo-comments.nvim', event = 'VimEnter', dependencies = { 'nvim-lua/plenary.nvim' }, opts = { signs = false } },
  {
    'echasnovski/mini.nvim',
    config = function()

      require('mini.ai').setup { n_lines = 500 }

      require('mini.surround').setup()

      local statusline = require 'mini.statusline'

      statusline.setup { use_icons = vim.g.have_nerd_font }

      statusline.section_location = function()
        return '%2l:%-2v'
      end

    end,
  },
  {
    'nvim-treesitter/nvim-treesitter',
    build = ':TSUpdate',
    opts = {
      ensure_installed = { 'bash', 'c', 'html', 'lua', 'luadoc', 'markdown', 'vim', 'vimdoc' },

      auto_install = true,
      highlight = {
        enable = true,

        additional_vim_regex_highlighting = { 'ruby' },
      },
      indent = { enable = true, disable = { 'ruby' } },
    },
    config = function(_, opts)

      require('nvim-treesitter.configs').setup(opts)

    end,
  },
  {
    'stevearc/oil.nvim',
    opts = {},
    dependencies = { 'nvim-tree/nvim-web-devicons' },
    config = function(_, _)
      require('oil').setup()
      vim.keymap.set('n', '-', '<CMD>Oil<CR>', { desc = 'Open Oil' })
    end,
  },
  { 'ThePrimeagen/vim-be-good' },