;; lib/host/tests/ledger.sx — the strangler migration ledger: entry shape,
;; status/domain queries, find, distinct domains, and coverage maths.

(define host-lg-pass 0)
(define host-lg-fail 0)
(define host-lg-fails (list))

(define
  host-lg-test
  (fn
    (name actual expected)
    (if
      (= actual expected)
      (set! host-lg-pass (+ host-lg-pass 1))
      (begin
        (set! host-lg-fail (+ host-lg-fail 1))
        (append! host-lg-fails {:name name :actual actual :expected expected})))))

;; ── entry constructor ───────────────────────────────────────────────
(define host-lg-e (host/ledger-entry "feed" "GET" "/feed" "feed:timeline" "migrated" "host/feed-timeline"))
(host-lg-test "entry domain" (get host-lg-e :domain) "feed")
(host-lg-test "entry path" (get host-lg-e :path) "/feed")
(host-lg-test "entry status" (get host-lg-e :status) "migrated")
(host-lg-test "entry handler" (get host-lg-e :handler) "host/feed-timeline")

;; ── find ────────────────────────────────────────────────────────────
(host-lg-test
  "find GET /feed -> migrated"
  (get (host/ledger-find host/ledger "GET" "/feed") :status)
  "migrated")
(host-lg-test
  "find GET /feed -> handler"
  (get (host/ledger-find host/ledger "GET" "/feed") :handler)
  "host/feed-timeline")
(host-lg-test
  "find POST /feed -> create"
  (get (host/ledger-find host/ledger "POST" "/feed") :handler)
  "host/feed-create")
(host-lg-test "find missing -> nil" (host/ledger-find host/ledger "GET" "/nope") nil)
(host-lg-test
  "find migrated relations read -> handler"
  (get (host/ledger-find host/ledger "GET" "/internal/data/get-children") :handler)
  "host/relations-children")

;; ── status queries ──────────────────────────────────────────────────
(host-lg-test "migrated count" (len (host/ledger-migrated host/ledger)) 4)
(host-lg-test "native count" (len (host/ledger-native host/ledger)) 1)
(host-lg-test "proxied count" (len (host/ledger-proxied host/ledger)) 6)

;; ── served? predicate ───────────────────────────────────────────────
(host-lg-test
  "served? migrated"
  (host/ledger-served? (host/ledger-find host/ledger "GET" "/feed"))
  true)
(host-lg-test
  "served? native"
  (host/ledger-served? (host/ledger-find host/ledger "GET" "/health"))
  true)
(host-lg-test
  "served? proxied false"
  (host/ledger-served? (host/ledger-find host/ledger "POST" "/internal/actions/relate"))
  false)

;; ── domain queries ──────────────────────────────────────────────────
(host-lg-test "relations domain count" (len (host/ledger-by-domain host/ledger "relations")) 4)
(host-lg-test "likes domain count" (len (host/ledger-by-domain host/ledger "likes")) 4)
(host-lg-test "domains count" (len (host/ledger-domains host/ledger)) 4)
(host-lg-test
  "domains has relations"
  (some (fn (d) (= d "relations")) (host/ledger-domains host/ledger))
  true)
(host-lg-test
  "domains has feed"
  (some (fn (d) (= d "feed")) (host/ledger-domains host/ledger))
  true)

;; ── coverage ────────────────────────────────────────────────────────
(define host-lg-cov (host/ledger-coverage host/ledger))
(host-lg-test "coverage total" (get host-lg-cov :total) 11)
(host-lg-test "coverage migrated" (get host-lg-cov :migrated) 4)
(host-lg-test "coverage proxied" (get host-lg-cov :proxied) 6)
(host-lg-test "coverage native" (get host-lg-cov :native) 1)
(host-lg-test "coverage served" (get host-lg-cov :served) 5)
(host-lg-test "coverage percent" (get host-lg-cov :percent) 45)

(define
  host-lg-tests-run!
  (fn
    ()
    {:total (+ host-lg-pass host-lg-fail)
     :passed host-lg-pass
     :failed host-lg-fail
     :fails host-lg-fails}))