VIM: Significant style changes to statusline

I have used colour and powerline symbols to differentiate different
parts of my status line.

Inspiration came from this:
https://www.reddit.com/r/vimporn/comments/kbtu74/my_theme_called_humanoid_and_my_statusbar/

nvim/.config/nvim/plugin/statusline.vim

@@ -1,36 +1,107 @@
 " Always show a statusline
 set laststatus=2
 
-" Make it empty so we can add to it
-set statusline=
-" Space character
-set statusline+=\ 
-" Short file name
-set statusline+=%f
-" Space character
-set statusline+=\ 
-" Read only flag
-set statusline+=%r
-" Space character
-set statusline+=\ 
-" Modified flag
-set statusline+=%m
-" Seperator
-set statusline+=%=
-" Git branch
-set statusline+=%{FugitiveStatusline()}
-" Space character
-set statusline+=\ 
-" column number
-set statusline+=%c
-set statusline+=:
-" Line number
-set statusline+=%l
-" Literal `/`
-set statusline+=/
-" Total number of lines
-set statusline+=%L
-" Space character
-set statusline+=\ 
-" File type
-set statusline+=%y
+" Get current filetype
+function! CheckFT(filetype)
+	if a:filetype == ''
+		return '-'
+	else
+		return tolower(a:filetype)
+	endif
+endfunction
+
+" set colors for statusline based on mode
+function! DetectMode(mode)
+	if empty($DISPLAY)
+		let left=""
+		let right=""
+	else
+		let left=""
+		let right=""
+	end
+
+	let statusline=""
+	" Mode
+	if a:mode == 'n'
+		let statusline .= "%#GruvboxBg4#\ " . left
+		let statusline .= "%#PmenuThumb#NORMAL"
+		let statusline .= "%#GruvboxBg4#" . right . "\ "
+	elseif a:mode == 'i'
+		let statusline .= "%#GruvboxBlue#\ " . left
+		let statusline .= "%#PmenuSel#INSERT"
+		let statusline .= "%#GruvboxBlue#" . right . "\ "
+	elseif a:mode == 'R'
+		let statusline .= "%#GruvboxRed#\ " . left
+		let statusline .= "%#DiffDelete#REPLACE"
+		let statusline .= "%#GruvboxRed#" . right . "\ "
+	elseif a:mode ==# 'v'
+		let statusline .= "%#GruvboxAqua#\ " . left
+		let statusline .= "%#DiffChange#VISUAL"
+		let statusline .= "%#GruvboxAqua#" . right . "\ "
+	elseif a:mode ==# 'V'
+		let statusline .= "%#GruvboxAqua#\ " . left
+		let statusline .= "%#DiffChange#VISUAL"
+		let statusline .= "%#GruvboxAqua#" . right . "\ "
+	elseif a:mode ==# ''
+		let statusline .= "%#GruvboxAqua#\ " . left
+		let statusline .= "%#DiffChange#VISUAL"
+		let statusline .= "%#GruvboxAqua#" . right . "\ "
+	elseif a:mode ==# 'c'
+		let statusline .= "%#GruvboxBg2#\ " . left
+		let statusline .= "%#Pmenu#COMMAND"
+		let statusline .= "%#GruvboxBg2#" . right . "\ "
+	elseif a:mode ==# 't'
+		let statusline .= "%#ModeTFGCS#\ " . left
+		let statusline .= "%#ModeTFGC#\ TERMINAL\ "
+		let statusline .= "%#ModeTFGCS#" . right . "\ " . left
+		let statusline .= "%#ModeTFGC#%[%n\ ̷%{bufnr('$')}\ "
+	elseif a:mode == 's' || a:mode == 'S' || a:mode == '^S'
+		let statusline .= "%#GruvboxAqua#\ " . left
+		let statusline .= "%#DiffChange#VISUAL"
+		let statusline .= "%#GruvboxAqua#" . right . "\ "
+	endif
+	" Filename
+	" grey = normal
+	" aqua = modified
+	" red = read only and not modified
+	if &mod == 1
+		let statusline .= "%#GruvboxAqua#\ " . left
+		let statusline .= "%#DiffChange#%.20f"
+		let statusline .= "%#GruvboxAqua#" . right . "\ "
+	else
+		if &readonly == 1
+			let statusline .= "%#GruvboxRed#\ " . left
+			let statusline .= "%#DiffDelete#%.20f"
+			let statusline .= "%#GruvboxRed#" . right . "\ "
+		else
+			let statusline .= "%#GruvboxBg4#\ " . left
+			let statusline .= "%#PmenuThumb#%.20f"
+			let statusline .= "%#GruvboxBg4#" . right . "\ "
+		endif
+	endif
+
+	" Seperator
+	let statusline .= "%="
+
+	" git branch
+	if exists("*FugitiveHead")
+		let statusline .= "%#GruvboxBg4#\ " . left
+		let statusline .= "%#PmenuThumb#%{FugitiveHead()}"
+		let statusline .= "%#GruvboxBg4#" . right . "\ "
+	endif
+
+	" Filetype
+	let statusline .= "%#GruvboxBlue#\ " . left
+	let statusline .= "%#PmenuSel#%{CheckFT(&filetype)}"
+	let statusline .= "%#GruvboxBlue#" . right . "\ "
+
+	" Cursor location and file length
+	let statusline .= "%#GruvboxYellow#\ " . left
+	let statusline .= "%#Search#%c:%l\ %#IncSearch#\ %L"
+	let statusline .= "%#GruvboxOrange#" . right . "\ "
+
+
+	return statusline
+endfunction
+
+set statusline=%!DetectMode(mode())