package conformance

import (
	"os"
	"testing"

	"github.com/tegwick/fluid-core/internal/validate"
)

// TestTelegramHandoverContractCompiles checks that the contract shipped in the
// fluid-telegram handover is one this gateway can actually enforce.
//
// A handover that shipped a contract the framework cannot parse would fail at
// the first publication, after the bot and channel had already been created.
// The check is skipped when the sibling repository is absent, so CI in a bare
// checkout still passes.
func TestTelegramHandoverContractCompiles(t *testing.T) {
	const path = "../../fluid-telegram/contracts/r1.openapi.yaml"

	raw, err := os.ReadFile(path)
	if err != nil {
		t.Skipf("fluid-telegram not checked out beside fluid-core: %v", err)
	}

	c, err := validate.ParseOpenAPI(raw)
	if err != nil {
		t.Fatalf("the handover contract does not compile: %v", err)
	}

	ops := c.Operations()
	want := map[string]bool{
		"GET /v1/channel-posts":           false,
		"POST /v1/channel-posts":          false,
		"GET /v1/channel-posts/{post_id}": false,
	}
	for _, op := range ops {
		if _, tracked := want[op]; tracked {
			want[op] = true
		}
	}
	for op, found := range want {
		if !found {
			t.Errorf("the contract does not declare %s; it has %v", op, ops)
		}
	}

	// The interface's complexity budget allows a maximum of 8 operations.
	if len(ops) > 8 {
		t.Errorf("the contract declares %d operations, over the intent's budget of 8", len(ops))
	}
}