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

vim.opt.termguicolors = true

-- Set to true if you have a Nerd Font installed and selected in the terminal
vim.g.have_nerd_font = true

-- [[ Setting options ]]
-- See `:help vim.opt`
-- NOTE: You can change these options as you wish!
--  For more options, you can see `:help option-list`

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

vim.opt.tabstop = 2
vim.opt.softtabstop = 2
vim.opt.shiftwidth = 2
vim.expandtab = true

-- Enable mouse mode, can be useful for resizing splits for example!
vim.opt.mouse = 'a'

-- Don't show the mode, since it's already in the status line
vim.opt.showmode = false

vim.schedule(function()
  vim.opt.clipboard = 'unnamedplus'
end)

-- Enable break indent
vim.opt.breakindent = true

-- Save undo history
vim.opt.undofile = true

-- Case-insensitive searching UNLESS \C or one or more capital letters in the search term
vim.opt.ignorecase = true
vim.opt.smartcase = true

-- Keep signcolumn on by default
vim.opt.signcolumn = 'yes'

-- Decrease update time
vim.opt.updatetime = 250

-- Decrease mapped sequence wait time
vim.opt.timeoutlen = 300

-- Configure how new splits should be opened
vim.opt.splitright = true
vim.opt.splitbelow = true

-- Sets how neovim will display certain whitespace characters in the editor.
--  See `:help 'list'`
--  and `:help 'listchars'`
vim.opt.list = true
vim.opt.listchars = { tab = '» ', trail = '·', nbsp = '␣' }

-- Preview substitutions live, as you type!
vim.opt.inccommand = 'split'

-- Show which line your cursor is on
vim.opt.cursorline = true

-- Minimal number of screen lines to keep above and below the cursor.
vim.opt.scrolloff = 10

-- [[ Basic Keymaps ]]
--  See `:help vim.keymap.set()`

-- Clear highlights on search when pressing <Esc> in normal mode
--  See `:help hlsearch`
vim.keymap.set('n', '<Esc>', '<cmd>nohlsearch<CR>')

-- Diagnostic keymaps
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagnostic [Q]uickfix list' })

-- Explorer shortcut
vim.keymap.set('n', '<leader>e', '<cmd>Ex<CR>', { desc = 'Return to [E]xplorer' })

-- Exit terminal mode in the builtin terminal with a shortcut that is a bit easier
-- for people to discover. Otherwise, you normally need to press <C-\><C-n>, which
-- is not what someone will guess without a bit more experience.
-- NOTE: This won't work in all terminal emulators/tmux/etc. Try your own mapping
-- or just use <C-\><C-n> to exit terminal mode
vim.keymap.set('t', '<Leader><Esc>', '<C-\\><C-n>', { noremap = true })
-- Keybinds to make split navigation easier.
--  Use CTRL+<hjkl> to switch between windows
--
--  See `:help wincmd` for a list of all window commands
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' })

-- [[ Basic Autocommands ]]
--  See `:help lua-guide-autocommands`

-- Highlight when yanking (copying) text
--  Try it with `yap` in normal mode
--  See `:help vim.highlight.on_yank()`
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,
})

-- [[ Install `lazy.nvim` plugin manager ]]
--    See `:help lazy.nvim.txt` or https://github.com/folke/lazy.nvim for more info
local lazypath = vim.fn.stdpath 'data' .. '/lazy/lazy.nvim'
if not (vim.uv or vim.loop).fs_stat(lazypath) then
  local lazyrepo = 'https://github.com/folke/lazy.nvim.git'
  local out = vim.fn.system { 'git', 'clone', '--filter=blob:none', '--branch=stable', lazyrepo, lazypath }
  if vim.v.shell_error ~= 0 then
    error('Error cloning lazy.nvim:\n' .. out)
  end
end ---@diagnostic disable-next-line: undefined-field
vim.opt.rtp:prepend(lazypath)

-- [[ Configure and install plugins ]]
--
--  To check the current status of your plugins, run
--    :Lazy
--
--  You can press `?` in this menu for help. Use `:q` to close the window
--
--  To update plugins you can run
--    :Lazy update
--
-- NOTE: Here is where you install your plugins.
require('lazy').setup({
  -- NOTE: Plugins can be added with a link (or for a github repo: 'owner/repo' link).
  'tpope/vim-sleuth', -- Detect tabstop and shiftwidth automatically

  { -- Adds git related signs to the gutter, as well as utilities for managing changes
    'lewis6991/gitsigns.nvim',
    opts = {
      signs = {
        add = { text = '+' },
        change = { text = '~' },
        delete = { text = '_' },
        topdelete = { text = '‾' },
        changedelete = { text = '~' },
      },
    },
  },

  { -- Useful plugin to show you pending keybinds.
    'folke/which-key.nvim',
    event = 'VimEnter', -- Sets the loading event to 'VimEnter'
    opts = {
      -- delay between pressing a key and opening which-key (milliseconds)
      -- this setting is independent of vim.opt.timeoutlen
      delay = 0,
      icons = {
        -- set icon mappings to true if you have a Nerd Font
        mappings = vim.g.have_nerd_font,
        -- If you are using a Nerd Font: set icons.keys to an empty table which will use the
        -- default which-key.nvim defined Nerd Font icons, otherwise define a string table
        keys = vim.g.have_nerd_font and {} or {
          Up = '<Up> ',
          Down = '<Down> ',
          Left = '<Left> ',
          Right = '<Right> ',
          C = '<C-…> ',
          M = '<M-…> ',
          D = '<D-…> ',
          S = '<S-…> ',
          CR = '<CR> ',
          Esc = '<Esc> ',
          ScrollWheelDown = '<ScrollWheelDown> ',
          ScrollWheelUp = '<ScrollWheelUp> ',
          NL = '<NL> ',
          BS = '<BS> ',
          Space = '<Space> ',
          Tab = '<Tab> ',
          F1 = '<F1>',
          F2 = '<F2>',
          F3 = '<F3>',
          F4 = '<F4>',
          F5 = '<F5>',
          F6 = '<F6>',
          F7 = '<F7>',
          F8 = '<F8>',
          F9 = '<F9>',
          F10 = '<F10>',
          F11 = '<F11>',
          F12 = '<F12>',
        },
      },

      -- Document existing key chains
      spec = {
        { '<leader>c', group = '[C]ode', mode = { 'n', 'x' } },
        { '<leader>d', group = '[D]ocument' },
        { '<leader>r', group = '[R]ename' },
        { '<leader>s', group = '[S]earch' },
        { '<leader>w', group = '[W]orkspace' },
        { '<leader>t', group = '[T]oggle' },
        { '<leader>h', group = 'Git [H]unk', mode = { 'n', 'v' } },
      },
    },
  },

  { -- Fuzzy Finder (files, lsp, etc)
    'nvim-telescope/telescope.nvim',
    event = 'VimEnter',
    branch = '0.1.x',
    dependencies = {
      'nvim-lua/plenary.nvim',
      { -- If encountering errors, see telescope-fzf-native README for installation instructions
        'nvim-telescope/telescope-fzf-native.nvim',

        -- `build` is used to run some command when the plugin is installed/updated.
        -- This is only run then, not every time Neovim starts up.
        build = 'make',

        -- `cond` is a condition used to determine whether this plugin should be
        -- installed and loaded.
        cond = function()
          return vim.fn.executable 'make' == 1
        end,
      },
      { 'nvim-telescope/telescope-ui-select.nvim' },

      -- Useful for getting pretty icons, but requires a Nerd Font.
      { 'nvim-tree/nvim-web-devicons', enabled = vim.g.have_nerd_font },
    },
    config = function()
      require('telescope').setup {
        extensions = {
          ['ui-select'] = {
            require('telescope.themes').get_dropdown(),
          },
        },
      }

      -- Enable Telescope extensions if they are installed
      pcall(require('telescope').load_extension, 'fzf')
      pcall(require('telescope').load_extension, 'ui-select')

      -- See `:help telescope.builtin`
      local builtin = require 'telescope.builtin'
      vim.keymap.set('n', '<leader>sh', builtin.help_tags, { desc = '[S]earch [H]elp' })
      vim.keymap.set('n', '<leader>sk', builtin.keymaps, { desc = '[S]earch [K]eymaps' })
      vim.keymap.set('n', '<leader>sf', builtin.find_files, { desc = '[S]earch [F]iles' })
      vim.keymap.set('n', '<leader>ss', builtin.builtin, { desc = '[S]earch [S]elect Telescope' })
      vim.keymap.set('n', '<leader>sw', builtin.grep_string, { desc = '[S]earch current [W]ord' })
      vim.keymap.set('n', '<leader>sg', builtin.live_grep, { desc = '[S]earch by [G]rep' })
      vim.keymap.set('n', '<leader>sd', builtin.diagnostics, { desc = '[S]earch [D]iagnostics' })
      vim.keymap.set('n', '<leader>sr', builtin.resume, { desc = '[S]earch [R]esume' })
      vim.keymap.set('n', '<leader>s.', builtin.oldfiles, { desc = '[S]earch Recent Files ("." for repeat)' })
      vim.keymap.set('n', '<leader><leader>', builtin.buffers, { desc = '[ ] Find existing buffers' })

      -- Slightly advanced example of overriding default behavior and theme
      vim.keymap.set('n', '<leader>/', function()
        -- You can pass additional configuration to Telescope to change the theme, layout, etc.
        builtin.current_buffer_fuzzy_find(require('telescope.themes').get_dropdown {
          winblend = 10,
          previewer = false,
        })
      end, { desc = '[/] Fuzzily search in current buffer' })

      -- It's also possible to pass additional configuration options.
      --  See `:help telescope.builtin.live_grep()` for information about particular keys
      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' })

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

  -- LSP Plugins
  {
    -- `lazydev` configures Lua LSP for your Neovim config, runtime and plugins
    -- used for completion, annotations and signatures of Neovim apis
    'folke/lazydev.nvim',
    ft = 'lua',
    opts = {
      library = {
        -- Load luvit types when the `vim.uv` word is found
        { path = '${3rd}/luv/library', words = { 'vim%.uv' } },
      },
    },
  },
  {
    -- Main LSP Configuration
    'neovim/nvim-lspconfig',
    dependencies = {
      { 'williamboman/mason.nvim', opts = {} },
      'williamboman/mason-lspconfig.nvim',
      'WhoIsSethDaniel/mason-tool-installer.nvim',

      -- Useful status updates for LSP.
      { 'j-hui/fidget.nvim', opts = {} },

      -- Allows extra capabilities provided by nvim-cmp
      'hrsh7th/cmp-nvim-lsp',
    },
    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, mode)
            mode = mode or 'n'
            vim.keymap.set(mode, keys, func, { buffer = event.buf, desc = 'LSP: ' .. desc })
          end

          -- Jump to the definition of the word under your cursor.
          --  This is where a variable was first declared, or where a function is defined, etc.
          --  To jump back, press <C-t>.
          map('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')

          -- Find references for the word under your cursor.
          map('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')

          -- Jump to the implementation of the word under your cursor.
          --  Useful when your language has ways of declaring types without an actual implementation.
          map('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')

          -- Jump to the type of the word under your cursor.
          --  Useful when you're not sure what type a variable is and you want to see
          --  the definition of its *type*, not where it was *defined*.
          map('<leader>D', require('telescope.builtin').lsp_type_definitions, 'Type [D]efinition')

          -- Fuzzy find all the symbols in your current document.
          --  Symbols are things like variables, functions, types, etc.
          map('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')

          -- Fuzzy find all the symbols in your current workspace.
          --  Similar to document symbols, except searches over your entire project.
          map('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

          -- Rename the variable under your cursor.
          --  Most Language Servers support renaming across files, etc.
          map('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')

          -- Execute a code action, usually your cursor needs to be on top of an error
          -- or a suggestion from your LSP for this to activate.
          map('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction', { 'n', 'x' })

          -- WARN: This is not Goto Definition, this is Goto Declaration.
          --  For example, in C this would take you to the header.
          map('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')

          -- The following two autocommands are used to highlight references of the
          -- word under your cursor when your cursor rests there for a little while.
          --    See `:help CursorHold` for information about when this is executed
          --
          -- When you move your cursor, the highlights will be cleared (the second autocommand).
          local client = vim.lsp.get_client_by_id(event.data.client_id)
          if client and client.supports_method(vim.lsp.protocol.Methods.textDocument_documentHighlight) then
            local highlight_augroup = vim.api.nvim_create_augroup('kickstart-lsp-highlight', { clear = false })
            vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
              buffer = event.buf,
              group = highlight_augroup,
              callback = vim.lsp.buf.document_highlight,
            })

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

            vim.api.nvim_create_autocmd('LspDetach', {
              group = vim.api.nvim_create_augroup('kickstart-lsp-detach', { clear = true }),
              callback = function(event2)
                vim.lsp.buf.clear_references()
                vim.api.nvim_clear_autocmds { group = 'kickstart-lsp-highlight', buffer = event2.buf }
              end,
            })
          end

          -- The following code creates a keymap to toggle inlay hints in your
          -- code, if the language server you are using supports them
          --
          -- This may be unwanted, since they displace some of your code
          if client and client.supports_method(vim.lsp.protocol.Methods.textDocument_inlayHint) then
            map('<leader>th', function()
              vim.lsp.inlay_hint.enable(not vim.lsp.inlay_hint.is_enabled { bufnr = event.buf })
            end, '[T]oggle Inlay [H]ints')
          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 = {
        lua_ls = {
          settings = {
            Lua = {
              completion = {
                callSnippet = 'Replace',
              },
            },
          },
        },
        clangd = {},
      }

      local ensure_installed = vim.tbl_keys(servers or {})
      vim.list_extend(ensure_installed, {
        'stylua', -- Used to format Lua code
      })
      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,
  },

  { -- Autoformat
    'stevearc/conform.nvim',
    event = { 'BufWritePre' },
    cmd = { 'ConformInfo' },
    keys = {
      {
        '<leader>f',
        function()
          require('conform').format { async = true, lsp_format = 'fallback' }
        end,
        mode = '',
        desc = '[F]ormat buffer',
      },
    },
    opts = {
      notify_on_error = false,
      format_on_save = function(bufnr)
        local disable_filetypes = { c = true, cpp = true }
        local lsp_format_opt
        if disable_filetypes[vim.bo[bufnr].filetype] then
          lsp_format_opt = 'never'
        else
          lsp_format_opt = 'fallback'
        end
        return {
          timeout_ms = 500,
          lsp_format = lsp_format_opt,
        }
      end,
      formatters_by_ft = {
        lua = { 'stylua' },
      },
    },
  },

  { -- Autocompletion
    'hrsh7th/nvim-cmp',
    event = 'InsertEnter',
    dependencies = {
      -- Snippet Engine & its associated nvim-cmp source
      {
        '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',
      'hrsh7th/cmp-cmdline',

      'hrsh7th/cmp-vsnip',
      'hrsh7th/vim-vsnip',
    },
    config = function()
      -- See `:help cmp`
      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 {
          -- Select the [n]ext item
          ['<C-n>'] = cmp.mapping.select_next_item(),
          -- Select the [p]revious item
          ['<C-p>'] = cmp.mapping.select_prev_item(),

          -- Scroll the documentation window [b]ack / [f]orward
          ['<C-b>'] = cmp.mapping.scroll_docs(-4),
          ['<C-f>'] = cmp.mapping.scroll_docs(4),

          -- Accept ([y]es) the completion.
          ['<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 = 'lazydev',
            group_index = 0,
          },
          { name = 'nvim_lsp' },
          { name = 'luasnip' },
          { name = 'path' },
        },
      }
    end,
  },

  {
    'folke/tokyonight.nvim',
    priority = 1000, -- Make sure to load this before all the other start plugins.
    init = function()
      vim.cmd.colorscheme 'tokyonight-night'

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

  -- Highlight todo, notes, etc in comments
  { 'folke/todo-comments.nvim', event = 'VimEnter', dependencies = { 'nvim-lua/plenary.nvim' }, opts = { signs = false } },

  { -- Collection of various small independent plugins/modules
    '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,
  },
  { -- Highlight, edit, and navigate code
    'nvim-treesitter/nvim-treesitter',
    build = ':TSUpdate',
    main = 'nvim-treesitter.configs', -- Sets main module to use for opts
    -- [[ Configure Treesitter ]] See `:help nvim-treesitter`
    opts = {
      ensure_installed = { 'bash', 'c', 'diff', 'html', 'lua', 'luadoc', 'markdown', 'markdown_inline', 'query', 'vim', 'vimdoc' },
      -- Autoinstall languages that are not installed
      auto_install = true,
      highlight = {
        enable = true,
        additional_vim_regex_highlighting = { 'ruby' },
      },
      indent = { enable = true, disable = { 'ruby' } },
    },
  },

  require 'kickstart.plugins.debug',
  require 'kickstart.plugins.indent_line',
  require 'kickstart.plugins.lint',
  require 'kickstart.plugins.autopairs',
  require 'kickstart.plugins.neo-tree',
  require 'kickstart.plugins.gitsigns', -- adds gitsigns recommend keymaps

  { import = 'custom.plugins' },
}, {
  ui = {
    icons = vim.g.have_nerd_font and {} or {
      cmd = '⌘',
      config = '🛠',
      event = '📅',
      ft = '📂',
      init = '⚙',
      keys = '🗝',
      plugin = '🔌',
      runtime = '💻',
      require = '🌙',
      source = '📄',
      start = '🚀',
      task = '📌',
      lazy = '💤 ',
    },
  },
})