-- Initialise dependencies
require 'custom.lazy'
require 'custom.autocomplete'

-- 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 = ' '

-- Use system clipboard for yanking/pasting
vim.o.clipboard = 'unnamedplus'

vim.wo.relativenumber = true

-- [[ Basic Keymaps ]]

-- 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 })

-- Diagnostic keymaps
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, { desc = 'Go to previous diagnostic message' })
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, { desc = 'Go to next diagnostic message' })
vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float, { desc = 'Open floating diagnostic message' })
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagnostics list' })

-- Oil.nvim
vim.keymap.set('n', '<leader>-', '<CMD>Oil<CR>', { desc = 'Open parent directory (oil)' })

-- Make window management nice
vim.api.nvim_set_keymap('n', '<C-Left>', ':vertical resize +3<CR>', { silent = true, noremap = true })
vim.api.nvim_set_keymap('n', '<C-Right>', ':vertical resize -3<CR>', { silent = true, noremap = true })
vim.api.nvim_set_keymap('n', '<C-Up>', ':resize -3<CR>', { silent = true, noremap = true })
vim.api.nvim_set_keymap('n', '<C-Down>', ':resize +3<CR>', { silent = true, noremap = true })

vim.api.nvim_set_keymap('n', '<C-h>', '<C-w>h', { silent = true, noremap = true })
vim.api.nvim_set_keymap('n', '<C-j>', '<C-w>j', { silent = true, noremap = true })
vim.api.nvim_set_keymap('n', '<C-k>', '<C-w>k', { silent = true, noremap = true })
vim.api.nvim_set_keymap('n', '<C-l>', '<C-w>l', { silent = true, noremap = true })

-- What you get in abundance when using Nvim
vim.keymap.set('n', '<leader>f', ':Sex', { silent = true, noremap = true })

-- Sets CTRL+Backspace to delete previous word
-- C-H is what the terminal sends when Ctrl+Backspace is pressed
vim.api.nvim_set_keymap('i', '<C-H>', '<C-W>', { noremap = true })

-- Lazygit
vim.api.nvim_set_keymap('n', '<leader>gg', ':LazyGit<CR>', { noremap = true, silent = true })

-- Doc comment generation
vim.api.nvim_set_keymap('n', '<Leader>cd', ":lua require('neogen').generate()<CR>", { noremap = true, silent = true })

-- When lyf give you lemons
vim.keymap.set('n', '<leader>fml', '<cmd>CellularAutomaton make_it_rain<CR>')

-- [[ Setting options ]]
-- See `:help vim.o`
-- NOTE: You can change these options as you wish!

-- Set highlight on search
vim.o.hlsearch = false

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

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

-- Sync clipboard between OS and Neovim.
--  Remove this option if you want your OS clipboard to remain independent.
--  See `:help 'clipboard'`
vim.o.clipboard = 'unnamedplus'

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

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

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

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

-- Decrease update time
vim.o.updatetime = 250
vim.o.timeoutlen = 300

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

-- NOTE: You should make sure your terminal supports this
vim.o.termguicolors = true

-- [[ 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 = '*',
})

-- [[ Configure Telescope ]]
-- See `:help telescope` and `:help telescope.setup()`
require('telescope').setup {
  defaults = {
    mappings = {
      i = {
        ['<C-u>'] = false,
        ['<C-d>'] = false,
      },
    },
  },
  pickers = {
    find_files = {
      find_command = { 'rg', '--files', '--hidden', '-g', '!.git' },
    },
  },
}

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

-- Telescope live_grep in git root
-- Function to find the git root directory based on the current buffer's path
local function find_git_root()
  -- Use the current buffer's path as the starting point for the git search
  local current_file = vim.api.nvim_buf_get_name(0)
  local current_dir
  local cwd = vim.fn.getcwd()
  -- If the buffer is not associated with a file, return nil
  if current_file == '' then
    current_dir = cwd
  else
    -- Extract the directory from the current file's path
    current_dir = vim.fn.fnamemodify(current_file, ':h')
  end

  -- Find the Git root directory from the current file's path
  local git_root = vim.fn.systemlist('git -C ' .. vim.fn.escape(current_dir, ' ') .. ' rev-parse --show-toplevel')[1]
  if vim.v.shell_error ~= 0 then
    print 'Not a git repository. Searching on current working directory'
    return cwd
  end
  return git_root
end

-- Custom live_grep function to search in git root
local function live_grep_git_root()
  local git_root = find_git_root()
  if git_root then
    require('telescope.builtin').live_grep {
      search_dirs = { git_root },
    }
  end
end

vim.api.nvim_create_user_command('LiveGrepGitRoot', live_grep_git_root, {})

-- 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' })

local function telescope_live_grep_open_files()
  require('telescope.builtin').live_grep {
    grep_open_files = true,
    prompt_title = 'Live Grep in Open Files',
  }
end

vim.keymap.set('n', '<leader>s/', telescope_live_grep_open_files, { desc = '[S]earch [/] in Open Files' })
vim.keymap.set('n', '<leader>ss', require('telescope.builtin').builtin, { desc = '[S]earch [S]elect Telescope' })
vim.keymap.set('n', '<leader>gf', require('telescope.builtin').git_files, { desc = 'Search [G]it [F]iles' })
vim.keymap.set('n', '<leader>sf', require('telescope.builtin').find_files, { desc = '[S]earch [F]iles' })
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>sG', ':LiveGrepGitRoot<cr>', { desc = '[S]earch by [G]rep on Git Root' })
vim.keymap.set('n', '<leader>sd', require('telescope.builtin').diagnostics, { desc = '[S]earch [D]iagnostics' })
vim.keymap.set('n', '<leader>sr', require('telescope.builtin').resume, { desc = '[S]earch [R]esume' })

-- [[ Configure Treesitter ]]
-- See `:help nvim-treesitter`
-- Defer Treesitter setup after first render to improve startup time of 'nvim {filename}'
vim.defer_fn(function()
  require('nvim-treesitter.configs').setup {
    -- Add languages to be installed here that you want installed for treesitter
    ensure_installed = { 'c', 'cpp', 'go', 'lua', 'python', 'rust', 'tsx', 'javascript', 'typescript', 'vimdoc', 'vim', 'bash', 'svelte', 'markdown' },

    -- Autoinstall languages that are not installed. Defaults to false (but you can change for yourself!)
    auto_install = false,
    -- Install languages synchronously (only applied to `ensure_installed`)
    sync_install = false,
    -- List of parsers to ignore installing
    ignore_install = {},
    -- You can specify additional Treesitter modules here: -- For example: -- playground = {--enable = true,-- },
    modules = {},
    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 = '<M-space>',
      },
    },
    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',
        },
      },
    },
  }
end, 0)

-- [[ Configure LSP ]]
--  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', function()
    vim.lsp.buf.code_action { context = { only = { 'quickfix', 'refactor', 'source' } } }
  end, '[C]ode [A]ction')

  nmap('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')
  nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
  nmap('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
  nmap('<leader>D', require('telescope.builtin').lsp_type_definitions, '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(_)
    vim.lsp.buf.format()
  end, { desc = 'Format current buffer with LSP' })
end

-- document existing key chains
require('which-key').add {

  -- Suggested Spec:
  {
    { '<leader>c', group = '[C]ode' },
    { '<leader>c_', hidden = true },
    { '<leader>d', group = '[D]ocument' },
    { '<leader>d_', hidden = true },
    { '<leader>g', group = '[G]it' },
    { '<leader>g_', hidden = true },
    { '<leader>h', group = 'Git [H]unk' },
    { '<leader>h_', hidden = true },
    { '<leader>r', group = '[R]ename' },
    { '<leader>r_', hidden = true },
    { '<leader>s', group = '[S]earch' },
    { '<leader>s_', hidden = true },
    { '<leader>t', group = '[T]oggle' },
    { '<leader>t_', hidden = true },
    { '<leader>w', group = '[W]orkspace' },
    { '<leader>w_', hidden = true },
  },
}
-- register which-key VISUAL mode
-- required for visual <leader>hs (hunk stage) to work
require('which-key').add {
  { '<leader>', group = 'VISUAL <leader>', mode = 'v' },
  { '<leader>h', desc = 'Git [H]unk', mode = 'v' },
}

-- mason-lspconfig requires that these setup functions are called in this order
-- before setting up the servers.
require('mason').setup()
require('mason-lspconfig').setup()

-- Enable the following language servers
-- Feel free to add/remove any LSPs that you want here. They will automatically be installed.
--
-- Add any additional override configuration in the following tables. They will be passed to
-- the `settings` field of the server config. You must look up that documentation yourself.
--
-- If you want to override the default filetypes that your language server will attach to you can
-- define the property 'filetypes' to the map in question.
--
-- Available servers:
-- https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md
local servers = {
  -- clangd = {},
  -- gopls = {},
  pyright = {},
  rust_analyzer = {
    ['rust-analyzer'] = {
      checkOnSave = true,
      check = {
        enable = true,
        command = 'clippy',
        features = 'all',
      },
    },
    filetypes = { 'rust' },
  },
  -- tsserver = {},
  -- html = { filetypes = { 'html', 'twig', 'hbs'} },

  lua_ls = {
    Lua = {
      workspace = { checkThirdParty = false },
      telemetry = { enable = false },
      -- NOTE: toggle below to ignore Lua_LS's noisy `missing-fields` warnings
      -- diagnostics = { disable = { 'missing-fields' } },
    },
  },

  svelte = {
    filetypes = {
      'svelte',
    },
  },
}

-- Setup neovim lua configuration
require('neodev').setup()

-- nvim-cmp supports additional completion capabilities, so broadcast that to servers
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)

-- Ensure the servers above are installed
local mason_lspconfig = require 'mason-lspconfig'

mason_lspconfig.setup {
  ensure_installed = vim.tbl_keys(servers),
}

mason_lspconfig.setup_handlers {
  function(server_name)
    require('lspconfig')[server_name].setup {
      capabilities = capabilities,
      on_attach = on_attach,
      settings = servers[server_name],
      filetypes = (servers[server_name] or {}).filetypes,
    }
  end,
}

local null_ls = require 'null-ls'
local augroup = vim.api.nvim_create_augroup('LspFormatting', {})

null_ls.setup {
  sources = {
    -- Lua
    null_ls.builtins.formatting.stylua,

    -- Python
    null_ls.builtins.formatting.black,

    -- Markdown
    null_ls.builtins.formatting.markdownlint,
    null_ls.builtins.diagnostics.markdownlint,

    -- Soy
    null_ls.builtins.formatting.prettier,
    null_ls.builtins.diagnostics.eslint,
  },
  on_attach = function(client, bufnr)
    if client.supports_method 'textDocument/formatting' then
      vim.api.nvim_clear_autocmds { group = augroup, buffer = bufnr }
      vim.api.nvim_create_autocmd('BufWritePre', {
        group = augroup,
        buffer = bufnr,
        callback = function()
          vim.lsp.buf.format()
        end,
      })
    end
  end,
}