"=============================================================================
" branch.vim --- branch action of git.vim
" Copyright (c) 2016-2023 Wang Shidong & Contributors
" Author: Wang Shidong < wsdjeg@outlook.com >
" URL: https://spacevim.org
" License: GPLv3
"=============================================================================

""
" @section git-branch, branch
" @parentsection commands
" This commands is to open branch manager.
" >
"   :Git branch
" <

if has('nvim-0.9.0')
  function! git#branch#current(...) abort
    let prefix = get(a:000, 0, '')
    return luaeval("require('git.command.branch').current(vim.api.nvim_eval('prefix'))")
  endfunction
  ""
  " update the branch info manually.
  function! git#branch#detect() abort
    lua require('git.command.branch').detect()
  endfunction

  function! git#branch#complete(ArgLead, CmdLine, CursorPos) abort
    return luaeval('require("git.command.branch").complete(vim.api.nvim_eval("a:ArgLead"), vim.api.nvim_eval("a:CmdLine"), vim.api.nvim_eval("a:CursorPos"))')
  endfunction
else

  let s:JOB = SpaceVim#api#import('job')
  let s:STR = SpaceVim#api#import('data#string')


  function! git#branch#run(args) abort
    if len(a:args) == 0
      call git#branch#manager#open()
      return
    else
      let cmd = ['git', 'branch'] + a:args
    endif
    call git#logger#debug('git-branch cmd:' . string(cmd))
    call s:JOB.start(cmd,
          \ {
          \ 'on_stderr' : function('s:on_stderr'),
          \ 'on_stdout' : function('s:on_stdout'),
          \ 'on_exit' : function('s:on_exit'),
          \ }
          \ )

  endfunction

  function! s:on_stdout(id, data, event) abort
    for line in filter(a:data, '!empty(v:val)')
      exe 'Echo ' . line
    endfor
  endfunction

  function! s:on_stderr(id, data, event) abort
    for line in filter(a:data, '!empty(v:val)')
      exe 'Echoerr ' . line
    endfor
  endfunction
  function! s:on_exit(id, data, event) abort
    call git#logger#debug('git-branch exit data:' . string(a:data))
    if a:data ==# 0
      call git#branch#manager#update()
      echo 'done!'
    else
      echo 'failed!'
    endif
  endfunction

  function! git#branch#complete(ArgLead, CmdLine, CursorPos) abort

    return "%\n" . join(getcompletion(a:ArgLead, 'file'), "\n")

  endfunction

  let s:branch = ''
  let s:branch_info = {}
  " {
  "   branch_name : 'xxx',
  "   last_update_done : 111111, ms
  " }
  let s:job_pwds = {}

  function! s:update_branch_name(pwd, ...) abort
    let force = get(a:000, 0, 0)
    let cmd = 'git rev-parse --abbrev-ref HEAD'
    if force || get(get(s:branch_info, a:pwd, {}), 'last_update_done', 0) >= localtime() - 1
      let jobid =  s:JOB.start(cmd,
            \ {
            \ 'on_stdout' : function('s:on_stdout_show_branch'),
            \ 'on_exit' : function('s:on_exit_show_branch'),
            \ 'cwd' : a:pwd,
            \ }
            \ )
      if jobid > 0
        call extend(s:job_pwds, {'jobid' . jobid : a:pwd})
      endif
    endif
  endfunction
  function! s:on_stdout_show_branch(id, data, event) abort
    let b = s:STR.trim(join(a:data, ''))
    if !empty(b)
      let pwd = get(s:job_pwds, 'jobid' . a:id, '')
      if !empty(pwd)
        let s:branch_info[pwd] = {
              \ 'name' : b,
              \ }
      endif
    endif
  endfunction

  function! s:on_exit_show_branch(id, data, event) abort
    let pwd = get(s:job_pwds, 'jobid' . a:id, '')
    if !has_key(s:branch_info, pwd) && !empty(pwd)
      let s:branch_info[pwd] = {}
    endif
    if !empty(pwd)
      call extend(s:branch_info[pwd], {
            \ 'last_update_done' : localtime(),
            \ })
    endif
    " when the pwd is same as current directory, redraw statueline
    if pwd == getcwd()
      redrawstatus
    endif
  endfunction
  ""
  " return the current branch info. this function can be used in statusline.
  function! git#branch#current(...) abort
    let pwd = getcwd()
    let branch = get(s:branch_info, pwd, {})
    if empty(branch)
      call s:update_branch_name(pwd)
    endif
    let branch_name = get(branch, 'name', '')
    let prefix = get(a:000, 0 , '')
    if !empty(branch_name)
      return ' ' . prefix . ' ' . branch_name . ' '
    else
      return ''
    endif
  endfunction
  function! git#branch#detect() abort
    call s:update_branch_name(getcwd(), 1)
  endfunction
endif