-- vim:foldmethod=marker

local function get_python_venv_path() --{{{1
    return vim.fn.stdpath('config') .. '/.venv/bin/python'
end

do
    vim.g.python3_host_prog = get_python_venv_path()
end

-- GENERAL SETTINGS {{{1

vim.cmd [[
    set exrc
    set secure
    set clipboard=unnamedplus
    set tabstop=4
    set shiftwidth=0
    set rnu
    set nu
    set nowrap
    set shiftround
    set expandtab
    set nohlsearch
    set incsearch
    set guicursor=n-v-c:block-Cursor

    nnoremap ,co :copen<CR>
    nnoremap ,cc :cclose<CR>
    nnoremap ,cq :call setqflist([])<CR>:cclose<CR>
    nnoremap ,ct :call setqflist([{'filename': expand('%'), 'lnum': line('.'), 'col': col('.'), 'text': 'TODO'}], 'a')<CR>
    nnoremap ,cf :cfirst<CR>
    nnoremap ,cl :clast<CR>
    nnoremap <c-n> :cnext<CR>zz
    nnoremap <c-p> :cprevious<CR>zz
    nnoremap ,cu :colder<CR>
    nnoremap ,cr :cnewer<CR>
    nnoremap ,h H
    nnoremap ,l L
    nnoremap H ^
    nnoremap L $
    xnoremap H ^
    xnoremap L $

    nnoremap ,cD :call setqflist(filter(getqflist(), 'v:val != getqflist()[getqflist({"idx": 0}).idx - 1]'))<CR>

    nnoremap ,t <c-w>v<c-w>l:terminal<CR>a

    " Don't include curdir, it just causes pain.
    set viewoptions=folds,cursor
    autocmd BufWinLeave,BufLeave *.* silent! mkview 
    autocmd BufWinEnter,BufEnter *.* silent! loadview 

    nnoremap <c-h> <c-w>h
    nnoremap <c-j> <c-w>j
    nnoremap <c-k> <c-w>k
    nnoremap <c-l> <c-w>l

    nnoremap <c-d> <c-d>zz
    nnoremap <c-u> <c-u>zz

    tnoremap <c-w>c <c-\><c-n><c-w>c

    autocmd TextYankPost * silent! lua vim.highlight.on_yank {higroup='Visual', timeout=100}
    autocmd BufEnter *__virtual* setlocal buftype=nofile bufhidden=hide noswapfile

    let g:rustfmt_autosave = 0

    " remove annoying and bad indentation
    autocmd FileType * setlocal indentexpr=

    set wildignore=*.o,*.obj,.git/**,tags,*.pyc
]]

vim.api.nvim_create_autocmd({
    'BufRead',
    'BufNewFile'
}, {
    pattern = {'*.h'},
    callback = function()
        vim.bo.filetype = 'c'
    end
})

vim.api.nvim_create_autocmd('BufEnter', {
    callback = function()
        local line = vim.api.nvim_buf_get_lines(0, 0, 1, false)[1]
        if line then
            local first_two = line:sub(1, 2)
            if first_two == '#!' then
                vim.bo.makeprg = './%'
            end
        end
    end,
})

-- LAZY.NVIM BOOTSTRAP {{{1
local lazypath = vim.fn.stdpath('data') .. '/lazy/lazy.nvim'
if not (vim.uv or vim.loop).fs_stat(lazypath) then
  vim.fn.system({
    'git',
    'clone',
    '--filter=blob:none',
    'https://github.com/folke/lazy.nvim.git',
    '--branch=stable', -- latest stable release
    lazypath,
  })
end
vim.opt.rtp:prepend(lazypath)

require'lazy'.setup{ --{{{1
    { 'stevearc/oil.nvim', --{{{2
        ---@module 'oil'
        ---@type oil.SetupOpts
        opts = {},
        dependencies = { { 'echasnovski/mini.icons', opts = {} } },
        lazy = false,
        config = function ()
            require('oil').setup({
                default_file_explorer = true,
                columns = {
                    'icon',
                    'permissions',
                    'size',
                    'mtime',
                },
                buf_options = {
                    buflisted = false,
                    bufhidden = 'hide',
                },
                win_options = {
                    wrap = false,
                    signcolumn = 'no',
                    cursorcolumn = false,
                    foldcolumn = '0',
                    spell = false,
                    list = false,
                    conceallevel = 3,
                    concealcursor = 'nvic',
                },
                delete_to_trash = false,
                skip_confirm_for_simple_edits = false,
                prompt_save_on_select_new_entry = true,
                cleanup_delay_ms = 2000,
                lsp_file_methods = {
                    enabled = true,
                    timeout_ms = 1000,
                    autosave_changes = false,
                },
                constrain_cursor = 'editable',
                watch_for_changes = false,
                keymaps = {
                    ['g?'] = { 'actions.show_help', mode = 'n' },
                    ['<CR>'] = 'actions.select',
                    ['<C-j>'] = 'actions.select',
                    ['<C-s>'] = { 'actions.select', opts = { vertical = true } },
                    ['<C-h>'] = { 'actions.select', opts = { horizontal = true } },
                    ['<C-t>'] = { 'actions.select', opts = { tab = true } },
                    ['<C-p>'] = 'actions.preview',
                    ['<C-c>'] = { 'actions.close', mode = 'n' },
                    ['<C-l>'] = 'actions.refresh',
                    ['-'] = { 'actions.parent', mode = 'n' },
                    ['_'] = { 'actions.open_cwd', mode = 'n' },
                    [',cd'] = { 'actions.cd', mode = 'n' },
                    [',CD'] = { 'actions.cd', opts = { scope = 'tab' }, mode = 'n' },
                    ['gs'] = { 'actions.change_sort', mode = 'n' },
                    ['gx'] = 'actions.open_external',
                    ['g.'] = { 'actions.toggle_hidden', mode = 'n' },
                    ['g\\'] = { 'actions.toggle_trash', mode = 'n' },
                },
                use_default_keymaps = true,
                view_options = {
                    show_hidden = true,
                    is_hidden_file = function(name, _)
                        local m = name:match('^%.')
                        return m ~= nil
                    end,
                    is_always_hidden = function(_, _)
                        return false
                    end,
                    natural_order = 'fast',
                    case_insensitive = false,
                    sort = {
                        { 'type', 'asc' },
                        { 'name', 'asc' },
                    },
                    highlight_filename = function(_, _, _, _)
                        return nil
                    end,
                },
                extra_scp_args = {},
                float = {
                    padding = 2,
                    max_width = 0,
                    max_height = 0,
                    border = 'rounded',
                    win_options = {
                        winblend = 0,
                    },
                    get_win_title = nil,
                    preview_split = 'auto',
                    override = function(conf)
                        return conf
                    end,
                },
                preview_win = {
                    update_on_cursor_moved = true,
                    preview_method = 'fast_scratch',
                    disable_preview = function(_)
                        return false
                    end,
                    win_options = {},
                },
                confirmation = {
                    max_width = 0.9,
                    min_width = { 40, 0.4 },
                    width = nil,
                    max_height = 0.9,
                    min_height = { 5, 0.1 },
                    height = nil,
                    border = 'rounded',
                    win_options = {
                        winblend = 0,
                    },
                },
                progress = {
                    max_width = 0.9,
                    min_width = { 40, 0.4 },
                    width = nil,
                    max_height = { 10, 0.9 },
                    min_height = { 5, 0.1 },
                    height = nil,
                    border = 'rounded',
                    minimized_border = 'none',
                    win_options = {
                        winblend = 0,
                    },
                },
                ssh = {
                    border = 'rounded',
                },
                keymaps_help = {
                    border = 'rounded',
                },
            })

            -- oil fix relative path
            vim.api.nvim_create_augroup('OilRelPathFix', {})
            vim.api.nvim_create_autocmd('BufLeave', {
                group = 'OilRelPathFix',
                pattern  = 'oil:///*',
                callback = function ()
                    vim.cmd('cd .')
                end
            })

            local actions = require('oil.actions')
            vim.keymap.set('n', '-', actions.parent.callback, { desc =  actions.parent.desc })
            vim.keymap.set('n', '_', actions.open_cwd.callback, { desc = actions.open_cwd.desc })
        end
    },
    { 'github/copilot.vim', --{{{2
        config = function()
            -- q for qomplete ;)
            vim.keymap.set('i', '<c-q>', 'copilot#Accept("\\<CR>")', {
                expr = true,
                replace_keycodes = false,
            })
            vim.g.copilot_no_tab_map = true
            vim.keymap.set('n', '<c-q>', ':Copilot panel<CR>', { noremap = true })
            vim.keymap.set('n', ',cd', ':Copilot disable<CR>', { noremap = true })
            vim.keymap.set('n', ',ce', ':Copilot disable<CR>', { noremap = true })
        end,
    },
    { 'rafaelsq/nvim-goc.lua', --{{{2
        config = function ()
            local goc = require'nvim-goc'
            goc.setup{}
            ---@param name string
            local cmd = function(name)
                vim.api.nvim_create_user_command(
                    'Go'..name,
                    'lua require"nvim-goc".'..name..'()',
                    { nargs = 0 }
                )
            end
            cmd('Coverage')
            cmd('CoverageFunc')
            cmd('ClearCoverage')
        end,
    },
    { 'f-person/git-blame.nvim', --{{{2
        keys = {',a'},
        config = function ()
            require'gitblame'.setup{
                enabled = false,
            }
            vim.cmd[[
                nnoremap ,a :GitBlameToggle<CR>
            ]]
        end
    },
    { 'unblevable/quick-scope', --{{{2
        init = function()
            vim.cmd [[
                let g:qs_highlight_on_keys = ['f', 'F', 't', 'T']
            ]]
        end,
    },
    { 'michaeljsmith/vim-indent-object', --{{{2
    },
    { 'kylechui/nvim-surround', --{{{2
        version = '*', -- Use for stability; omit to use `main` branch for the latest features
        event = 'VeryLazy',
        config = function()
            require('nvim-surround').setup{}
        end
    },
    { 'echasnovski/mini.align', --{{{2
        version = false,
        config = function()
            require'mini.align'.setup()
        end,
    },
    { 'sainnhe/everforest', --{{{2
        lazy = false,
        priority = 1000,
        config = function()
            vim.o.termguicolors = true
            vim.g.everforest_enable_italic = true
            vim.cmd.colorscheme('everforest')
        end,
    },
    { 'roodletoof/zen-mode.nvim', --{{{2
        keys = {',z'},
        config = function ()
            local zen_mode = require'zen-mode'
            zen_mode.setup{}
            vim.keymap.set(
                'n',
                ',z',
                function()
                    zen_mode.toggle{
                        window = {
                            width = 80,
                            options = {
                                signcolumn = 'no',
                                cursorline = false,
                                cursorcolumn = false,
                                foldcolumn = '0',
                                list = false,
                            }
                        },
                    }
                end,
                { silent = true }
            )
        end
    },
    { 'seblyng/roslyn.nvim', --{{{2
        --WARN: requires html-lsp, roslyn and rzls installed via Mason
        dependencies = {
            'tris203/rzls.nvim',
            config = true,
        },
        ft = {'cs', 'razor'},
        config = function()
            local _ = require('mason-registry') -- TODO, do I even need this line?
            local rzls_path = vim.fn.expand('$MASON/packages/rzls/libexec')
            local cmd = {
                'roslyn',
                '--stdio',
                '--logLevel=Information',
                '--extensionLogDirectory=' .. vim.fs.dirname(vim.lsp.get_log_path()),
                '--razorSourceGenerator=' .. vim.fs.joinpath(rzls_path, 'Microsoft.CodeAnalysis.Razor.Compiler.dll'),
                '--razorDesignTimePath=' .. vim.fs.joinpath(rzls_path, 'Targets', 'Microsoft.NET.Sdk.Razor.DesignTime.targets'),
                '--extension',
                vim.fs.joinpath(rzls_path, 'RazorExtension', 'Microsoft.VisualStudioCode.RazorExtension.dll'),
            }
            ---@diagnostic disable-next-line: missing-fields
            require'rzls'.setup{} -- the missing-fields waring is bullshit. the fields are actually optional
            require'roslyn'.setup{
                cmd = cmd,
                config = {
                    handlers = require 'rzls.roslyn_handlers',
                    ['csharp|code_lens'] = {
                        dotnet_enable_references_code_lens = true,
                    }
                },
            }
        end,
        init = function()
            vim.filetype.add{
                extension = {
                    razor = 'razor',
                    cshtml = 'razor'
                }
            }
        end,
    },
    { 'folke/lazydev.nvim', --{{{2
        ft = 'lua', -- only load on lua files
        opts = {
            library = {
                { path = '${3rd}/luv/library', words = { 'vim%.uv' } },
                { path = '${3rd}/love2d/library', words = { 'love' } },
            },
        },
    },
    { 'neovim/nvim-lspconfig', --{{{2
        dependencies = {
            'williamboman/mason.nvim',
            'williamboman/mason-lspconfig.nvim',
        },
        config = function()
            require'mason'.setup{
                registries = {
                    'github:mason-org/mason-registry',
                    'github:crashdummyy/mason-registry',
                },
            }

            require'mason-lspconfig'.setup()
            vim.lsp.config.zls = {
                before_init = function(_, _)
                    vim.g.zig_fmt_autosave = false -- may not be needed anymore?
                end,
            }
            vim.lsp.config.lua_ls = {
                settings = {
                    Lua = { runtime = { version = 'LuaJIT' } }
                }
            }
            vim.lsp.config.gopls = {
                filetypes = { -- unsure if this is entirely correct...
                    'go',
                    'gomod',
                    'gowork',
                    'gotmpl',
                    'html'
                },
                settings = {
                    gopls = {
                        templateExtensions = {'html', 'gotmpl'}
                    }
                }
            }

            vim.lsp.enable('gdscript')
            vim.lsp.config('hls', {
                filetypes = { 'haskell', 'lhaskell', 'cabal' },
            })
            vim.lsp.enable('hls')

            vim.api.nvim_create_autocmd('LspAttach', {
                callback = function(args)
                    vim.bo[args.buf].tagfunc = nil
                end,
            })

            local function jump_to_definition()
                local word = vim.fn.expand('<cword>')
                vim.cmd('tag ' .. word)
            end

            vim.keymap.set( 'n', ',fc', jump_to_definition, { noremap = true, silent = true})
            vim.keymap.set( 'n', ',fd', vim.lsp.buf.definition, { noremap = true, silent = true})

            vim.cmd [[
                noremap ,rn :lua vim.lsp.buf.rename()<CR>
                noremap ,ft :lua vim.lsp.buf.type_definition()<CR>
                noremap ,fr :lua vim.lsp.buf.references()<CR>
                noremap ,ca :lua vim.lsp.buf.code_action()<CR>
                noremap ,oe :lua vim.diagnostic.open_float()<CR>
                noremap ,ea :lua vim.diagnostic.setqflist()<CR>
                noremap ,ee :lua vim.diagnostic.setqflist{severity='ERROR'}<CR>
                noremap ,ew :lua vim.diagnostic.setqflist{severity='WARN'}<CR>
                noremap ,ei :lua vim.diagnostic.setqflist{severity='INFO'}<CR>
                noremap ,eh :lua vim.diagnostic.setqflist{severity='HINT'}<CR>
            ]]
        end
    },
    { 'nvim-treesitter/nvim-treesitter', --{{{2
        config = function()
            require'nvim-treesitter.configs'.setup{
                modules = {},
                ensure_installed = {},
                ignore_install = {},
                parser_install_dir = nil,
                sync_install = false,
                auto_install = true,
                indent = {
                    enable = true,
                },
                highlight = {
                    enable = true,
                    additional_vim_regex_highlighting = false,
                },
            }
        end,
    },
    { 'kdheepak/lazygit.nvim', --{{{2
        lazy = true,
        cmd = { 'LazyGit', 'LazyGitConfig', 'LazyGitCurrentFile', 'LazyGitFilter', 'LazyGitFilterCurrentFile', },
        dependencies = { 'nvim-lua/plenary.nvim', },
        keys = { { ',g', '<cmd>LazyGit<cr>', desc = 'LazyGit' }, },
    },
    { 'mfussenegger/nvim-dap', --{{{2
        dependencies = {
            'nvim-treesitter/nvim-treesitter',
            'theHamsta/nvim-dap-virtual-text',
            'leoluz/nvim-dap-go',
            'mfussenegger/nvim-dap-python',
        },
        keys = {',b', ',db', ',B', '<B'},
        config = function()
            require'nvim-dap-virtual-text'.setup{ commented = true, }
            require'dap-go'.setup()
            require'dap-python'.setup(get_python_venv_path())

            local dap = require'dap'
            dap.adapters.godot = { type = 'server', host = '127.0.0.1', port = 6006, }
            dap.configurations.gdscript = { {type = 'godot', request = 'launch', name = 'Launch scene', project = '${workspaceFolder}',} }

            dap.adapters.lldb = {
                type = 'executable',
                command = vim.fn.exepath('lldb-dap'),
                name = 'lldb'
            }

            dap.configurations.c = {
                {
                    name = 'Launch',
                    type = 'lldb',
                    request = 'launch',
                    program = function()
                        return vim.fn.input('Path to executable: ', vim.fn.getcwd() .. '/', 'file')
                    end,
                    cwd = '${workspaceFolder}',
                    stopOnEntry = false,
                    args = function()
                        local i = vim.fn.input('input args: ')
                        return vim.fn.split(i)
                    end,
                    runInTerminal = true,
                },
            }
            dap.configurations.cpp = dap.configurations.c
            dap.configurations.rust = dap.configurations.c

            vim.cmd [[
                nnoremap ,b :DapToggleBreakpoint<CR>
                nnoremap ,B :DapClearBreakpoints<CR>
                nnoremap <B :DapClearBreakpoints<CR>
                nnoremap ,db :DapContinue<CR>
                nnoremap <Down> :DapStepInto<CR>
                nnoremap <UP> :DapStepOut<CR>
                nnoremap <Right> :DapStepOver<CR>
            ]]
        end
    },
    { 'dcampos/nvim-snippy', --{{{2
        config = function()
            require'snippy'.setup{ enable_auto = true, }
            vim.cmd [[
                imap <expr> <c-l> '<Plug>(snippy-next)'
                imap <expr> <c-k> '<Plug>(snippy-previous)'
                smap <expr> <c-l> '<Plug>(snippy-next)'
                smap <expr> <c-k> '<Plug>(snippy-previous)'
                nmap g; <Plug>(snippy-cut-text)
                xmap g; <Plug>(snippy-cut-text)
            ]]
        end
    },
    { 'hrsh7th/nvim-cmp', --{{{2
        dependencies = {
            'hrsh7th/cmp-nvim-lsp',
            'hrsh7th/cmp-path',
            'dcampos/nvim-snippy',
            'dcampos/cmp-snippy',
            'quangnguyen30192/cmp-nvim-tags',
        },
        config = function()
            local cmp = require'cmp'
            cmp.setup{
                snippet = {
                    expand = function(args)
                        require'snippy'.expand_snippet(args.body)
                    end,
                },
                mapping = {
                    ['<C-y>'] = cmp.mapping.confirm{ select = true },
                    ['<C-n>'] = cmp.mapping.select_next_item(),
                    ['<C-p>'] = cmp.mapping.select_prev_item(),
                },
                sources = cmp.config.sources(
                    {
                        { name = 'snippy',   priority = 100000000000000000000 },
                        { name = 'nvim_lsp', priority = 1000000000},
                        { name = 'tags',     priority = 100 },
                        { name = 'path',     priority = 1},
                    }
                ),
                preselect = cmp.PreselectMode.None,
            }
        end,
    },
    { 'nvim-telescope/telescope.nvim', --{{{2
        tag = '0.1.8',
        dependencies = {
            'nvim-lua/plenary.nvim',
            'nvim-telescope/telescope-ui-select.nvim',
        },
        config = function()
            local a = require'telescope.actions'
            require'telescope'.setup{
                defaults = {
                    file_ignore_patterns = {'%__virtual.cs$'},
                    mappings = {
                        i = { ['<C-Q>'] = a.smart_send_to_qflist + a.open_qflist, ['<C-j>'] = a.select_default, },
                        n = { ['<C-Q>'] = a.smart_send_to_qflist + a.open_qflist, ['<C-j>'] = a.select_default, },
                    }
                },
                extensions = { ['ui-select'] = { require'telescope.themes'.get_dropdown{}, }, },
            }
            vim.cmd [[
                noremap ,fa :lua require'telescope.builtin'.find_files({hidden=true, no_ignore=true, no_ignore_parent=true})<CR>
                noremap ,ff :lua require'telescope.builtin'.find_files()<CR>
                noremap ,fo :lua require'telescope.builtin'.oldfiles()<CR>
                noremap ,fg :lua require'telescope.builtin'.live_grep()<CR>
                noremap ,fs :lua require'telescope.builtin'.grep_string()<CR>
                noremap ,fz :lua require'telescope.builtin'.current_buffer_fuzzy_find()<CR>
                noremap ,fh :lua require'telescope.builtin'.help_tags()<CR>
                noremap ,fm :lua require'telescope.builtin'.marks()<CR>
                noremap ,fb :lua require'telescope.builtin'.buffers()<CR>

                noremap ,fea :lua require'telescope.builtin'.diagnostics()<CR>
                noremap ,fee :lua require'telescope.builtin'.diagnostics{severity='ERROR'}<CR>
                noremap ,few :lua require'telescope.builtin'.diagnostics{severity='WARN'}<CR>
                noremap ,fei :lua require'telescope.builtin'.diagnostics{severity='INFO'}<CR>
                noremap ,feh :lua require'telescope.builtin'.diagnostics{severity='HINT'}<CR>
            ]]

            require'telescope'.load_extension'ui-select'
        end,
    },
}

do -- split line {{{1
    local SPLIT_DELIMETERS = { -- single characters only
        [','] = true,
        [';'] = true,
        ['|'] = true,
    }
    local SPLIT_BETWEEN = { -- single characters only
        ['('] = ')',
        ['['] = ']',
        ['{'] = '}',
        ['<'] = '>',
    }
    local SPLIT_IGNORE_BETWEEN = { --single characters only
        ['"'] = '"',
        ["'"] = "'",
    }

    local split_line = function()
        local SPLIT_WHITESPACE = '	'
        if vim.o.expandtab then
            SPLIT_WHITESPACE = ''
            for _ = 1, vim.o.tabstop do
                SPLIT_WHITESPACE = SPLIT_WHITESPACE .. ' '
            end
        end

        local line = vim.api.nvim_get_current_line()
        local _, col =  unpack(vim.api.nvim_win_get_cursor(0))
        col = col + 1 -- Doing this to make it 1-indexed

        ---@type integer?
        local first_bracket_i = nil
        for i = col, #line do
            local char = line:sub(i, i)
            if SPLIT_BETWEEN[char] ~= nil then
                first_bracket_i = i
                break
            end
        end

        if not first_bracket_i then
            print('No opening brackets found after cursor on this line.')
            return
        end

        ---@type integer[]
        local split_indexes = {} -- Populate this array
        ---@type integer?
        local last_bracket_i = nil -- And find this index

        do
            ---@type string[]
            local closing_bracket_stack = {}
            local icon_to_close_ignore = ''
            local in_ignore = false

            for i = first_bracket_i, #line do
                local char = line:sub(i,i)

                if in_ignore then
                    in_ignore = not (char == icon_to_close_ignore)
                    goto continue
                end

                if SPLIT_IGNORE_BETWEEN[char] ~= nil then
                    icon_to_close_ignore = SPLIT_IGNORE_BETWEEN[char]
                    in_ignore = true
                    goto continue
                end
                -- string handling complete

                if SPLIT_BETWEEN[char] ~= nil then
                    table.insert(
                        closing_bracket_stack,
                        SPLIT_BETWEEN[char]
                    )
                end

                if char == closing_bracket_stack[#closing_bracket_stack] then
                    table.remove(closing_bracket_stack)
                end

                if #closing_bracket_stack == 1 and SPLIT_DELIMETERS[char] then
                    table.insert(split_indexes, i)
                end

                if #closing_bracket_stack == 0 then
                    last_bracket_i = i
                    break
                end
                ::continue::
            end
        end

        if not last_bracket_i then
            print('The first opening bracket found after the cursor was not closed on this line.')
            return
        end

        ---@type string
        local leading_whitespace = string.match(line, '^%s*')
        local first_line = line:sub(1, first_bracket_i)
        local last_line = leading_whitespace .. line:sub(last_bracket_i, #line)
        if #split_indexes == 0 then
            if (last_bracket_i - first_bracket_i == 1) then return end
            local row, _ = unpack(vim.api.nvim_win_get_cursor(0))
            line = line:sub(first_bracket_i+1, last_bracket_i-1)
            local leading_pattern = '^[%s'
            for k, _ in pairs(SPLIT_DELIMETERS) do
                leading_pattern = leading_pattern .. k
            end
            leading_pattern = leading_pattern .. ']*'
            line = line:gsub(leading_pattern, leading_whitespace .. SPLIT_WHITESPACE, 1)
            line = line:gsub('[%s]*$', '', 1)
            vim.api.nvim_buf_set_lines(0, row-1, row, false, {first_line})
            vim.api.nvim_buf_set_lines(0, row, row, false, {last_line})
            vim.api.nvim_buf_set_lines(0, row, row, false, {line})
            return
        end

        local middle_lines = {}
        table.insert(
            middle_lines,
            line:sub(first_bracket_i+1, split_indexes[1])
        )
        for i = 1, #split_indexes-1 do
            table.insert(
                middle_lines,
                line:sub(split_indexes[i], split_indexes[i+1])
            )
        end
        table.insert(
            middle_lines,
            line:sub(split_indexes[#split_indexes], last_bracket_i-1)
        )

        local leading_pattern = '^[%s'
        for k, _ in pairs(SPLIT_DELIMETERS) do
            leading_pattern = leading_pattern .. k
        end
        leading_pattern = leading_pattern .. ']*'

        -- Cleanup step
        for i, middle_line in ipairs(middle_lines) do
            middle_line = middle_line:gsub(leading_pattern, leading_whitespace .. SPLIT_WHITESPACE, 1)
            middle_line = middle_line:gsub('[%s]*$', '', 1)
            middle_lines[i] = middle_line
        end

        if middle_lines[#middle_lines]:match('^%s*$') ~= nil then
            table.remove(middle_lines)
        end

        local row, _ = unpack(vim.api.nvim_win_get_cursor(0))
        vim.api.nvim_buf_set_lines(0, row-1, row, false, {first_line})
        vim.api.nvim_buf_set_lines(0, row, row, false, {last_line})
        vim.api.nvim_buf_set_lines(0, row, row, false, middle_lines)
    end

    vim.keymap.set(
        'n',
        ',s',
        split_line,
        { silent = true }
    )
end