declare-option str awk_cmd 'awk'

declare-user-mode git
map global git <ret> ':git-show-current-line<ret>'  -docstring 'open last commit that touched current line'
map global git b     ':git-branches<ret>'           -docstring 'list branches'
map global git B     ':git-blame-current-line<ret>' -docstring 'blame current line'
map global git n     ':git next-hunk<ret>'          -docstring 'goto next hunk'
map global git p     ':git prev-hunk<ret>'          -docstring 'goto previous hunk'
map global git d     ':git diff<ret>'               -docstring 'diff'

## Blame current line
set-face global GitBlameLineRef red,black
set-face global GitBlameLineSummary green,black
set-face global GitBlameLineAuthor blue,black
set-face global GitBlameLineTime default,black@comment

define-command git-blame-current-line %{
  info -markup -style above -anchor "%val{cursor_line}.%val{cursor_column}" -- %sh{
    git blame -L$kak_cursor_line,$kak_cursor_line $kak_bufname --incremental | $kak_opt_awk_cmd '\
BEGIN {
  ref = ""
  author = ""
  time = ""
  summary = ""
}

/^[a-f0-9]+ [0-9]+ [0-9]+ [0-9]+$/ {
  ref = substr($1, 0, 8)
}

/summary/ {
  for (i = 2; i < NF; i++) {
    summary = summary $i " "
  }

  summary = summary $NF
}

/author / {
  for (i = 2; i < NF; i++) {
    author = author $i " "
  }

  author = author $NF
}

/author-time/ {
  time = strftime("%a %d %b %Y, %H:%M:%S", $2)
}

END {
  first = sprintf("{GitBlameLineRef}%s {GitBlameLineSummary}%s", ref, summary)
  second = sprintf("{GitBlameLineAuthor}%s {GitBlameLineTime}on %s", author, time)

  max_len = length(first)
  second_len = length(second)
  if (second_len > max_len) {
    max_len = second_len
  }
  fmt_string = sprintf("%%-%ds", max_len)

  printf fmt_string "\n", first
  printf fmt_string, second
}'
  }
}

## Show the commit that touched the line under the cursor.
declare-option str git_show_current_line_commit
define-command git-show-current-line %{
  set-option global git_show_current_line_commit %sh{ git blame -L$kak_cursor_line,$kak_cursor_line $kak_bufname | cut -d' ' -f1 }
  edit -scratch *git*
  set-option buffer filetype git-commit
  execute-keys '%|git show --pretty=fuller $kak_opt_git_show_current_line_commit<ret>gg'
  set-option buffer readonly true
}