(require 'cl-lib)
(require 'ox-latex)

;; Install a default set-up for Beamer export.
(unless (assoc "orgcv" org-latex-classes)
  (add-to-list 'org-latex-classes
	       '("orgcv"
		 "\\documentclass{moderncv}"
		 ("\\section{%s}" . "\\section*{%s}")
		 ("\\subsection{%s}" . "\\subsection*{%s}")
		 ("\\subsubsection{%s}" . "\\subsubsection*{%s}"))))


;;; User-Configurable Variables

(defgroup org-export-cv nil
  "Options specific for using the moderncv class in LaTeX export."
  :tag "Org moderncv"
  :group 'org-export
  :version "25.3")

;;; Define Back-End
(org-export-define-derived-backend 'orgcv 'latex
  :options-alist
  '((:mobile "MOBILE" nil nil parse)
    (:homepage "HOMEPAGE" nil nil parse)
    (:address "ADDRESS" nil nil parse)
    (:gitlab "GITLAB" nil nil parse)
    (:github "GITHUB" nil nil parse)
    (:linkedin "LINKEDIN" nil nil parse)
    )
  :translate-alist '((template . org-cv-template)))

;;;; Template
;;
;; Template used is similar to the one used in `latex' back-end,
;; excepted for the table of contents and Beamer themes.

(defun org-cv-template (contents info)
  "Return complete document string after LaTeX conversion.
CONTENTS is the transcoded contents string.  INFO is a plist
holding export options."
  (let ((title (org-export-data (plist-get info :title) info))
	(spec (org-latex--format-spec info)))
    (concat
     ;; Time-stamp.
     (and (plist-get info :time-stamp-file)
	  (format-time-string "%% Created %Y-%m-%d %a %H:%M\n"))
     ;; LaTeX compiler.
     ;;(org-latex--insert-compiler info)
     ;; Document class and packages.
     (org-latex-make-preamble info)
     ;; Possibly limit depth for headline numbering.
     (let ((sec-num (plist-get info :section-numbers)))
       (when (integerp sec-num)
	 (format "\\setcounter{secnumdepth}{%d}\n" sec-num)))
     ;; Author.
     (let ((author (and (plist-get info :with-author)
			(let ((auth (plist-get info :author)))
			  (and auth (org-export-data auth info))))))
       (format "\\name{%s}{}\n" author))
     ;; email
     (let ((email (and (plist-get info :with-email)
		       (org-export-data (plist-get info :email) info))))
       (when email (format "\\email{%s}\n" email)))
     ;; phone
     (let ((mobile (org-export-data (plist-get info :mobile) info)))
       (when mobile (format "\\phone[mobile]{%s}\n" mobile)))
     ;; homepage
     (let ((homepage (org-export-data (plist-get info :homepage) info)))
       (when homepage (format "\\homepage{%s}\n" homepage)))
     ;; github
     (let ((github (org-export-data (plist-get info :github) info)))
       (when github (format "\\social[github]{%s}\n" github)))
     ;; gitlab
     (let ((gitlab (org-export-data (plist-get info :gitlab) info)))
       (when gitlab (format "\\social[gitlab]{%s}\n" gitlab)))
     ;; linkedin
     (let ((linkedin (org-export-data (plist-get info :linkedin) info)))
       (when linkedin (format "\\social[linkedin]{%s}\n" linkedin)))
     ;; address
     (let ((address (org-export-data (plist-get info :address) info)))
       (when address (format "\\address{%s}\n" address)))
     ;; Date.
     (let ((date (and (plist-get info :with-date) (org-export-get-date info))))
       (format "\\date{%s}\n" (org-export-data date info)))

     ;; Title and subtitle.
     (let* ((subtitle (plist-get info :subtitle))
	    (formatted-subtitle
	     (when subtitle
	       (format (plist-get info :latex-subtitle-format)
		       (org-export-data subtitle info))))
	    (separate (plist-get info :latex-subtitle-separate)))
       (concat
	(format "\\title{%s%s}\n" title
		(if separate "" (or formatted-subtitle "")))
	(when (and separate subtitle)
	  (concat formatted-subtitle "\n"))))
     ;; Hyperref options.
     (let ((template (plist-get info :latex-hyperref-template)))
       (and (stringp template)
            (format-spec template spec)))
     ;; Document start.
     "\\begin{document}\n\n"
     ;; Title command.
     (let* ((title-command (plist-get info :latex-title-command))
            (command (and (stringp title-command)
                          (format-spec title-command spec))))
       (org-element-normalize-string
	(cond ((not (plist-get info :with-title)) nil)
	      ((string= "" title) nil)
	      ((not (stringp command)) nil)
	      ((string-match "\\(?:[^%]\\|^\\)%s" command)
	       (format command title))
	      (t command))))
     ;; Table of contents.
     (let ((depth (plist-get info :with-toc)))
       (when depth
	 (concat (when (integerp depth)
		   (format "\\setcounter{tocdepth}{%d}\n" depth))
		 (plist-get info :latex-toc-command))))
     ;; Document's body.
     contents
     ;; Creator.
     (and (plist-get info :with-creator)
	  (concat (plist-get info :creator) "\n"))
     ;; Document end.
     "\\end{document}")))