#lang racket/base

(require rackunit
         racket/file
         git)

(define tmp (make-temporary-file "racket-git-remote-test~a" 'directory))
(define origin (build-path tmp "origin.git"))
(define a (build-path tmp "a"))
(define b (build-path tmp "b"))
(define c (build-path tmp "c"))

(define (configure!)
  (git 'config "user.name" "Racket Git Test")
  (git 'config "user.email" "racket-git-test@example.invalid"))

(dynamic-wind
  void
  (lambda ()
    (git-init origin #:bare? #t)
    (make-directory a)

    (parameterize ([current-directory a])
      (git 'init)
      (configure!)
      (call-with-output-file "value.txt"
        #:exists 'truncate/replace
        (lambda (out) (displayln "one" out)))
      (git 'add "value.txt")
      (git 'commit "one")
      (git 'remote 'add "origin" (path->string origin))
      (check-equal? (git 'remote) '("origin"))
      (check-equal? (git 'remote 'get-url "origin") (path->string origin))
      (define push-out (open-output-string))
      (parameterize ([current-output-port push-out])
        (git 'push))
      ;; A successful push must remain safe when the returned credentials,
      ;; callbacks and options become eligible for collection.
      (collect-garbage)
      (collect-garbage)
      (collect-garbage)
      (define push-text (get-output-string push-out))
      (check-true (regexp-match? #rx"\\[git\\] push origin/master" push-text))
      (check-true (regexp-match? #rx"\\[git\\] push origin/master: done" push-text))
      ;; A real push reports transfer progress, but the FFI callback itself only
      ;; records state.  A normal Racket thread performs the output.
      (check-true (regexp-match? #rx"100%" push-text))
      (define quiet-out (open-output-string))
      (parameterize ([current-output-port quiet-out])
        (git 'push #:quiet #t))
      (check-equal? (get-output-string quiet-out) ""))

    (git-clone (path->string origin) b)
    (define clone-quiet-out (open-output-string))
    (parameterize ([current-output-port clone-quiet-out])
      (git-clone (path->string origin) c #:quiet #t))
    (check-equal? (get-output-string clone-quiet-out) "")

    (parameterize ([current-directory b])
      (configure!)
      (check-equal? (git-current-branch) "master")
      (call-with-output-file "value.txt"
        #:exists 'truncate/replace
        (lambda (out) (displayln "two" out)))
      (git 'add "value.txt")
      (git 'commit "two")
      (git 'push)
      (git 'tag "v2")
      (git 'push-tag "v2")
      (define push-tag-quiet-out (open-output-string))
      (parameterize ([current-output-port push-tag-quiet-out])
        (git 'push-tag "v2" #:quiet #t))
      (check-equal? (get-output-string push-tag-quiet-out) ""))

    (parameterize ([current-directory a])
      (check-equal? (file->string "value.txt") "one\n")
      (check-equal? (string-length (git 'pull)) 40)
      (check-equal? (file->string "value.txt") "two\n")
      (check-true (git-clean?))
      (git 'fetch)
      (check-equal? (git 'tag) '("v2"))
      (define fetch-quiet-out (open-output-string))
      (parameterize ([current-output-port fetch-quiet-out])
        (git 'fetch #:quiet #t))
      (check-equal? (get-output-string fetch-quiet-out) "")
      (define pull-quiet-out (open-output-string))
      (check-false
       (parameterize ([current-output-port pull-quiet-out])
         (git 'pull #:quiet #t)))
      (check-equal? (get-output-string pull-quiet-out) "")

      (call-with-output-file "local.txt"
        #:exists 'truncate/replace
        (lambda (out) (displayln "local" out)))
      (git 'add "local.txt")
      (git 'commit "local change"))

    (parameterize ([current-directory b])
      (call-with-output-file "remote.txt"
        #:exists 'truncate/replace
        (lambda (out) (displayln "remote" out)))
      (git 'add "remote.txt")
      (git 'commit "remote change")
      (git 'push))

    (parameterize ([current-directory a])
      (define before (git-head))
      (check-exn #rx"non-fast-forward"
                 (lambda () (git 'pull)))
      (check-equal? (git-head) before)
      (check-true (file-exists? "local.txt"))
      (check-false (file-exists? "remote.txt"))))
  (lambda ()
    (delete-directory/files tmp)))

;; HTTPS push without configured credentials must fail before entering libgit2.
(let ([tmp2 (make-temporary-file "racket-git-https-test~a" 'directory)])
  (dynamic-wind
    void
    (lambda ()
      (parameterize ([current-directory tmp2])
        (git 'init)
        (configure!)
        (call-with-output-file "x.txt" #:exists 'truncate/replace
          (lambda (out) (displayln "x" out)))
        (git 'add "x.txt")
        (git 'commit "x")
        (git 'remote 'add "origin" "https://example.invalid/private/repo.git")
        (check-exn #rx"no HTTPS credentials are stored"
                   (lambda () (git 'push)))))
    (lambda () (delete-directory/files tmp2))))