package projectinstance

import (
	"testing"

	"chat-agent-system/internal/workflowdef"
)

func TestComputePlanHash_LegacySnapshotStableWithoutDutyPolicy(t *testing.T) {
	t.Parallel()
	plan := WorkflowPlan{
		WorkflowDefinitionKey: workflowdef.OfficialKeyMain,
		WorkflowVersion:       1,
		Stages: []StagePlan{{
			StageKey: "s1", Enabled: true,
			DocTasks: []DocTaskPlan{{
				TaskKey: "intake", Enabled: true,
				Duties: DocDuty{AuthorUserID: 1, ReviewerUserID: 2, ApproverUserID: 3},
			}},
		}},
	}
	h1, err := computePlanHash(plan)
	if err != nil {
		t.Fatal(err)
	}
	// empty DutyPolicy must not appear in JSON (omitempty) — hash must match explicit separated unset
	plan2 := plan
	plan2.Stages[0].DocTasks[0].DutyPolicy = ""
	h2, err := computePlanHash(plan2)
	if err != nil {
		t.Fatal(err)
	}
	if h1 != h2 {
		t.Fatalf("empty duty_policy must be hash-stable: %s vs %s", h1, h2)
	}
	plan3 := plan
	plan3.Stages[0].DocTasks[0].DutyPolicy = DutyPolicyAuthorOnly
	h3, err := computePlanHash(plan3)
	if err != nil {
		t.Fatal(err)
	}
	if h3 == h1 {
		t.Fatal("author_only duty_policy must change plan hash")
	}
}