let g:_executable = 'main'
let g:_arguments = ''
let g:_envs = {}
let g:_make = 'make'

set makeprg=make
set errorformat=%f:%l:%c:\ %m
packadd termdebug

let g:termdebug_config = {}
let g:termdebug_config['variables_window'] = v:true
let g:ale_linters = { 'cpp': ['clangd', 'cppcheck'] }

nnoremap <leader>x :call LocalRun()<CR>
nnoremap <leader>c :call LocalMake()<CR>
nnoremap <leader>m :call LocalDebugMain()<CR>
nnoremap <leader>n :call LocalDebugLine()<CR>
nnoremap <leader>z :call LocalBuildAndRun()<CR>

function! LocalRun() abort
	let envs = join( map(items(g:_envs), { _, kv -> kv[0] . '=' . kv[1] }), ' ')
	execute printf("term env %s ./%s %s", envs, g:_executable, g:_arguments)
endfunction

function! LocalDebugMain() abort
	execute printf('Termdebug %s %s', g:_executable, g:_arguments)

	for [k, v] in items(g:_envs)
		call TermDebugSendCommand(printf('set env %s %s', k, v))
	endfor

	call TermDebugSendCommand('directory ' . getcwd())
	call TermDebugSendCommand('break main')
	call TermDebugSendCommand('run')
endfunction

function! LocalDebugLine() abort
	execute printf('Termdebug %s %s', g:_executable, g:_arguments)

	for [k, v] in items(g:_envs)
		call TermDebugSendCommand(printf('set env %s %s', k, v))
	endfor

	call TermDebugSendCommand('directory ' . getcwd())
	call TermDebugSendCommand(printf('break %s:%d', expand('%:p'), line('.')))
	call TermDebugSendCommand('run')
endfunction

function! LocalMake() abort
	let envs = join( map(items(g:_envs), { _, kv -> kv[0] . '=' . kv[1] }), ' ')
	execute printf('silent !env %s %s', g:_make, envs)

	" Filter non valid errors out of quicklist.
	let qfl = getqflist()
	let filtered = filter(copy(qfl), {_, entry -> entry.valid == 1})
	call setqflist(filtered, 'r')

	redraw!

	if len(filtered) > 0
		execute exists(':CtrlPQuickfix') ? 'CtrlPQuickfix' : 'copen'
	else
		cclose
	endif
endfunction

function! LocalBuildAndRun() abort
	let envs = join(map(items(g:_envs), { _, kv -> kv[0] . '=' . kv[1] }), ' ')
	let cmd = printf('env %s %s', envs, g:_make)
	let result = system(cmd)
	let status = v:shell_error

	execute 'call LocalMake()'

	if status == 0
		call LocalRun()
	else
		echohl ErrorMsg | echo "Build failed (exit code " . status . ")" | echohl None
	endif
endfunction