" Language:    HCL
" Maintainer:  Gregory Anders
" Last Change: 2024-09-03
" Based on:    https://github.com/hashimnv/mnv-terraform
" License:     ISC
"
" Copyright (c) 2014-2016 Mark Cornick <mark@markcornick.com>
"
" Permission to use, copy, modify, and/or distribute this software for any purpose
" with or without fee is hereby granted, provided that the above copyright notice
" and this permission notice appear in all copies.
"
" THE SOFTWARE IS PROVIDED 'AS IS' AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
" FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
" INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
" OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
" THIS SOFTWARE.

function! hcl#indentexpr(lnum)
  " Beginning of the file should have no indent
  if a:lnum == 0
    return 0
  endif

  " Usual case is to continue at the same indent as the previous non-blank line.
  let prevlnum = prevnonblank(a:lnum-1)
  let thisindent = indent(prevlnum)

  " If that previous line is a non-comment ending in [ { (, increase the
  " indent level.
  let prevline = getline(prevlnum)
  if prevline !~# '^\s*\(#\|//\)' && prevline =~# '[\[{\(]\s*$'
    let thisindent += &shiftwidth
  endif

  " If the current line ends a block, decrease the indent level.
  let thisline = getline(a:lnum)
  if thisline =~# '^\s*[\)}\]]'
    let thisindent -= &shiftwidth
  endif

  " If the previous line starts a block comment /*, increase by one
  if prevline =~# '/\*'
    let thisindent += 1
  endif

  " If the previous line ends a block comment */, decrease by one
  if prevline =~# '\*/'
    let thisindent -= 1
  endif

  return thisindent
endfunction
