;; ==========================================================================
;; test-router.sx — Tests for client-side route matching
;;
;; Requires: test-framework.sx loaded first.
;; Modules tested: router.sx
;;
;; No additional platform functions needed — router.sx is pure.
;; ==========================================================================


;; --------------------------------------------------------------------------
;; split-path-segments
;; --------------------------------------------------------------------------

(defsuite "split-path-segments"
  (deftest "root path"
    (assert-equal (list) (split-path-segments "/")))

  (deftest "single segment"
    (assert-equal (list "docs") (split-path-segments "/docs")))

  (deftest "multiple segments"
    (assert-equal (list "docs" "hello") (split-path-segments "/docs/hello")))

  (deftest "trailing slash stripped"
    (assert-equal (list "docs") (split-path-segments "/docs/")))

  (deftest "deep path"
    (assert-equal (list "a" "b" "c" "d") (split-path-segments "/a/b/c/d"))))


;; --------------------------------------------------------------------------
;; parse-route-pattern
;; --------------------------------------------------------------------------

(defsuite "parse-route-pattern"
  (deftest "static pattern"
    (let ((segs (parse-route-pattern "/docs/intro")))
      (assert-length 2 segs)
      (assert-equal "literal" (get (first segs) "type"))
      (assert-equal "docs" (get (first segs) "value"))
      (assert-equal "literal" (get (nth segs 1) "type"))
      (assert-equal "intro" (get (nth segs 1) "value"))))

  (deftest "pattern with param"
    (let ((segs (parse-route-pattern "/docs/<slug>")))
      (assert-length 2 segs)
      (assert-equal "literal" (get (first segs) "type"))
      (assert-equal "docs" (get (first segs) "value"))
      (assert-equal "param" (get (nth segs 1) "type"))
      (assert-equal "slug" (get (nth segs 1) "value"))))

  (deftest "multiple params"
    (let ((segs (parse-route-pattern "/users/<uid>/posts/<pid>")))
      (assert-length 4 segs)
      (assert-equal "param" (get (nth segs 1) "type"))
      (assert-equal "uid" (get (nth segs 1) "value"))
      (assert-equal "param" (get (nth segs 3) "type"))
      (assert-equal "pid" (get (nth segs 3) "value"))))

  (deftest "root pattern"
    (assert-equal (list) (parse-route-pattern "/"))))


;; --------------------------------------------------------------------------
;; match-route
;; --------------------------------------------------------------------------

(defsuite "match-route"
  (deftest "exact match returns empty params"
    (let ((result (match-route "/docs/intro" "/docs/intro")))
      (assert-true (not (nil? result)))
      (assert-length 0 (keys result))))

  (deftest "param match extracts value"
    (let ((result (match-route "/docs/hello" "/docs/<slug>")))
      (assert-true (not (nil? result)))
      (assert-equal "hello" (get result "slug"))))

  (deftest "no match returns nil"
    (assert-nil (match-route "/docs/hello" "/essays/<slug>"))
    (assert-nil (match-route "/docs" "/docs/<slug>")))

  (deftest "segment count mismatch returns nil"
    (assert-nil (match-route "/a/b/c" "/a/<b>"))
    (assert-nil (match-route "/a" "/a/b")))

  (deftest "root matches root"
    (let ((result (match-route "/" "/")))
      (assert-true (not (nil? result)))))

  (deftest "multiple params extracted"
    (let ((result (match-route "/users/42/posts/99" "/users/<uid>/posts/<pid>")))
      (assert-true (not (nil? result)))
      (assert-equal "42" (get result "uid"))
      (assert-equal "99" (get result "pid")))))


;; --------------------------------------------------------------------------
;; find-matching-route
;; --------------------------------------------------------------------------

(defsuite "find-matching-route"
  (deftest "finds first matching route"
    (let ((routes (list
            {:pattern "/docs/" :parsed (parse-route-pattern "/docs/") :name "docs-index"}
            {:pattern "/docs/<slug>" :parsed (parse-route-pattern "/docs/<slug>") :name "docs-page"})))
      (let ((result (find-matching-route "/docs/hello" routes)))
        (assert-true (not (nil? result)))
        (assert-equal "docs-page" (get result "name"))
        (assert-equal "hello" (get (get result "params") "slug")))))

  (deftest "returns nil for no match"
    (let ((routes (list
            {:pattern "/docs/<slug>" :parsed (parse-route-pattern "/docs/<slug>") :name "docs-page"})))
      (assert-nil (find-matching-route "/essays/hello" routes))))

  (deftest "matches exact routes before param routes"
    (let ((routes (list
            {:pattern "/docs/" :parsed (parse-route-pattern "/docs/") :name "docs-index"}
            {:pattern "/docs/<slug>" :parsed (parse-route-pattern "/docs/<slug>") :name "docs-page"})))
      ;; /docs/ should match docs-index, not docs-page
      (let ((result (find-matching-route "/docs/" routes)))
        (assert-true (not (nil? result)))
        (assert-equal "docs-index" (get result "name")))))

  (deftest "propagates stream flag from route"
    (let ((routes (list
            {:pattern "/demo/streaming"
             :parsed (parse-route-pattern "/demo/streaming")
             :name "streaming-demo"
             :stream true
             :has-data true})))
      (let ((result (find-matching-route "/demo/streaming" routes)))
        (assert-true (not (nil? result)))
        (assert-equal true (get result "stream"))
        (assert-equal true (get result "has-data")))))

  (deftest "non-streaming route has no stream flag"
    (let ((routes (list
            {:pattern "/about"
             :parsed (parse-route-pattern "/about")
             :name "about"
             :has-data false})))
      (let ((result (find-matching-route "/about" routes)))
        (assert-true (not (nil? result)))
        (assert-nil (get result "stream")))))

  (deftest "streaming route with params propagates all properties"
    (let ((routes (list
            {:pattern "/stream/<id>"
             :parsed (parse-route-pattern "/stream/<id>")
             :name "stream-page"
             :stream true
             :has-data true
             :content "expr"})))
      (let ((result (find-matching-route "/stream/fast" routes)))
        (assert-true (not (nil? result)))
        (assert-equal true (get result "stream"))
        (assert-equal "fast" (get (get result "params") "id"))
        (assert-equal "expr" (get result "content"))))))