#| Copyright (C) 2025 Peter McGoron
 |
 | This program is free software: you can redistribute it and/or modify it
 | under the terms of the GNU General Public License as published by the
 | Free Software Foundation, either version 3 of the License, or (at your
 | option) any later version.
 |
 | This program is distributed in the hope that it will be useful, but
 | WITHOUT ANY WARRANTY; without even the implied warranty of
 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 | General Public License for more details.
 |
 | You should have received a copy of the GNU General Public License along
 | with this program.  If not, see <https://www.gnu.org/licenses/>.
 |#

(define-module (mcgoron guix scheme-packages)
  #:use-module (guix packages)
  #:use-module (gnu packages)
  #:use-module (guix licenses)
  #:use-module (guix git-download)
  #:use-module (guix download)
  #:use-module (gnu packages version-control)
  #:use-module (gnu packages bash)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system)
  #:use-module (guix build-system copy)
  #:use-module (guix build-system trivial)
  #:use-module (gnu packages scheme)
  #:use-module (gnu packages cmake)
  #:use-module (guix build-system cmake)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages bdw-gc)
  #:use-module (gnu packages libffi)
  #:use-module (gnu packages tls)
  #:use-module (guix gexp))

;;;;;;;;;;;;;
;;;; Portable
;;;;;;;;;;;;;

(define-public r7rs-lib-dir "share/scheme/r7rs")
(define-public r6rs-lib-dir "share/scheme/r6rs")

(define-public (default-copying-build-system name desc dir)
  (let ((lower* (build-system-lower copy-build-system)))
      (build-system
       (name name)
       (description desc)
       (lower
        (lambda args
          (apply lower*
                 (if (memq #:install-plan args)
                     args
                     (append
                      args
                      (list
                       #:install-plan
                       `'(("." ,(string-append dir "/"))))))))))))

(define-public portable-r7rs-build-system
  (default-copying-build-system 'r7rs
                                "Copy Scheme libraries into R7RS directory"
                                r7rs-lib-dir))

(define-public hello-world-r7rs
  (package
    (name "hello-world-r7rs")
    (version "1.0.0")
    (synopsis "Prints hello world")
    (description "A test library for packages that respect R7RS_LIBRARY_PATH")
    (license public-domain)
    (home-page "https://example.com")
    (build-system portable-r7rs-build-system)
    (source
      (origin
        (method url-fetch)
        (uri "https://florida.moe/ftp/hello-world-r7rs/1.0.0.tar.gz")
        (sha256 (base32 "1cx9p2mz3cmn02imp137vqmq8aw3mh5s23ybprgkc8pshgmaf8jn"))))))
(define-public r7rs-search-path-specification 
  (search-path-specification
    (variable "R7RS_LIBRARY_PATH")
    (files (list r7rs-lib-dir))))

(define* (package/path imported-package
                       package-name
                       synopsis
                       description
                       binary-name
                       target-binary-name
                       impl-envar
                       guix-impl-envar
                       portable-envar
                       #:optional (set-environment-beforehand ""))
(package
  (name (string-append package-name "-with-path"))
  (synopsis synopsis)
  (description description)
  (version "1.0.0")
  (source #f)
  (license gpl3+)
  (build-system trivial-build-system)
  (home-page "https://florida.moe/guix-scheme")
  (arguments
    `(#:modules ((guix build utils))
      #:builder
      (begin
        (use-modules (guix build utils))
        (let* ((bin (assoc-ref %outputs "out"))
               (impl (string-append
                       (assoc-ref %build-inputs ,package-name)
                       ,binary-name))
               (sh (string-append
                    (assoc-ref %build-inputs "bash-minimal")
                    "/bin/bash"))
               (script (string-append bin ,target-binary-name)))
          (mkdir-p (dirname script))
          (with-output-to-file script
            (lambda ()
              (format #t
"#!~a

if [ -z \"$~a\" ] && [ -z \"$~a\" ]; then
    exec -a $0 \"~a\" \"$@\"
else
    ~a
    ~a=\"${~a:+${~a}:}${~a:+${~a}:}${~a:+${~a}:}\" exec -a $0 \"~a\" \"$@\"
fi"
               sh
               ,guix-impl-envar ,portable-envar
               impl
               ,set-environment-beforehand
               ,impl-envar ,impl-envar ,impl-envar 
               ,guix-impl-envar ,guix-impl-envar
               ,portable-envar ,portable-envar
               impl)))
          (chmod script #o755)))))
  (inputs (list imported-package bash-minimal))
  (native-inputs (list imported-package bash-minimal))
  (native-search-paths (list (search-path-specification
                               (variable guix-impl-envar)
                               (files (list foment-lib-dir)))
                             r7rs-search-path-specification))))

;;;;;;;;;;;;;;
;;;; Foment
;;;;;;;;;;;;;;

(define-public foment-lib-dir "share/foment")
(define-public foment-build-system
  (default-copying-build-system 'foment-scheme
                                "Copy Scheme libraries into Foment Scheme directory"
                                foment-lib-dir))

(define-public foment
  (package
    (name "foment")
    (version "0.4.1-1.6089c3c")
    (source
      (origin
         (method git-fetch)
         (uri (git-reference (url "https://github.com/leftmike/foment")
                             (commit "6089c3c9e762875f619ef382d27943819bbe002b")))
         (sha256 (base32 "1a6q8qfd6ggc6fl9lf1d8m20q8k498jrswc4qcn3bb7rkq4w258a"))
         #;(patches (search-patches "mcgoron/guix/patches/foment-0.4.1-library-path.patch"))))
    (build-system gnu-build-system)
    (arguments 
      (list
       #:phases
        #~(modify-phases %standard-phases
            (delete 'configure)
            (add-before 'build 'patch-makefile
              (lambda* (#:key outputs #:allow-other-keys)
                (substitute* "unix/makefile"
                  (("sudo *") "")
                  (("git rev-parse --abbrev-ref HEAD") "echo \"master\"")
                  (("git rev-parse --short HEAD") "echo 6089c3c"))
;; Replace hardcoded path /bin/sh with the current interpreter.
;; This follows what racket does:
;; https://issues.guix.gnu.org/47180
                (substitute* "src/base.scm"
                  (("\"/bin/sh\"")
                   (let ((sh (which "sh")))
                     (string-append "(if (file-exists? \"" sh "\")\n"
                                    "    \"" sh "\"\n" 
                                    "    \"/bin/sh\")"))))))
            (replace 'build
              (lambda _
                (with-directory-excursion "unix"
                  (invoke "make"))))
            (replace 'check
              (lambda* (#:key tests? #:allow-other-keys)
                (when tests?
                  (with-directory-excursion "unix"
                    (invoke "make" "test")
                    (invoke "make" "stress-test")))))
            (replace 'install
              (lambda* (#:key outputs #:allow-other-keys)
                 (let ((bin (string-append (assoc-ref outputs "out")
                                           "/bin")))
                 (install-file "unix/release/foment" bin)
                 (copy-recursively "unix/debug/foment"
                                   (string-append bin "/foment-debug"))))))))
    (home-page "https://github.com/leftmike/foment")
    (synopsis "Foment is an implementation of R7RS Scheme.")
    (license expat)
    (inputs '())
    (native-inputs (list bash))
    (description "Foment is an implementation of R7RS Scheme written in C++ with support for continuation marks and many SRFIs.")))

(define-public foment-with-path
  (package/path foment
                "foment"
                "Foment with Guix paths"
                "Wrapper for Foment Scheme that adds Guix-managed paths to Foment search path"
                "/bin/foment"
                "/bin/foment"
                "FOMENT_LIBPATH"
                "GUIX_FOMENT_PATH"
                "R7RS_LIBRARY_PATH"))

;;;;;;;;;;;;;;;;;;;
;;;; Chibi
;;;;;;;;;;;;;;;;;;;

(define-public chibi-lib-dir "share/guix-chibi")
(define-public chibi-binlib-dir "lib/guix-chibi")

(define-public chibi-scheme-build-system
  (default-copying-build-system 'chibi-scheme
                                "Copy Scheme libraries into Chibi Scheme directory"
                                foment-lib-dir))

#;(define-public chibi-scheme-with-path
  (package
   (name "chibi-scheme-with-path")
   (home-page "https://github.com/ashinn/chibi-scheme")
   (version "0.11")
   (source #f)
   (native-search-paths
    (list (search-path-specification
           (variable "GUIX_CHIBI_PATH")
           (files (list chibi-lib-dir chibi-binlib-dir)))
          r7rs-search-path-specification))))

;;;;;;;;;;;;;;;;
;;;; Sagittarius
;;;;;;;;;;;;;;;;

(define-public sagittarius-lib-dir "share/guix-sagittarius")

(define-public sagittarius-scheme-build-system
  (default-copying-build-system 'sagittarius
                                "Copy Scheme libraries into Sagittarius directory"
                                foment-lib-dir))

(define-public sagittarius-scheme
  (package
    (name "sagittarius-scheme")
    (version "0.9.13")
    (source
      (origin
         (method url-fetch)
         (uri "https://github.com/ktakashi/sagittarius-scheme/releases/download/v0.9.13/sagittarius-0.9.13.tar.gz")
         (patches (search-patches "mcgoron/guix/patches/sagittarius-scheme-0.9.13-library-path.patch"))
         (sha256 (base32 "0wspsv7mr1lchv0lfc50s750a358534pgri1c2fqlws31hci5y4c"))))
    (build-system cmake-build-system)
    (arguments '(#:phases (modify-phases %standard-phases
                            ;; Tests don't work yet. Issues with network.
                            (delete 'check))))
    (inputs (list libgc zlib libffi openssl))
    (home-page "https://ktakashi.github.io/")
    (synopsis "Script interpreter with many built-in libraries")
    (license bsd-2)
    (description "Sagittarius Scheme is a R6RS/R7RS Scheme implementation with a lot of practical libraries, especially cryptographic libraries.")))