package workbench

import (
	"testing"
)

func TestValidateFlowRejectsCycle(t *testing.T) {
	err := validateFlow(FlowData{Nodes: []FlowNode{{ID: "a", AgentID: "x"}, {ID: "b", AgentID: "x"}}, Edges: []FlowEdge{{Source: "a", Target: "b"}, {Source: "b", Target: "a"}}})
	if err == nil {
		t.Fatal("cycle must be rejected")
	}
}
func TestValidateFlowAllowsAcyclicGraph(t *testing.T) {
	err := validateFlow(FlowData{Nodes: []FlowNode{{ID: "a", AgentID: "x"}, {ID: "b", AgentID: "x"}}, Edges: []FlowEdge{{Source: "a", Target: "b"}}})
	if err != nil {
		t.Fatalf("acyclic graph rejected: %v", err)
	}
}
func TestValidateDaysRequiresSequentialPrerequisitesAndHooks(t *testing.T) {
	days := []Day{{Day: 1, Title: "基础", Hook: "下一步"}, {Day: 2, Title: "进阶", Prerequisite: "基础", Hook: "总结", Nodes: []Node{{ID: "n2", Label: "练习"}}}}
	if err := validateDays(days, 2); err == nil {
		t.Fatal("day without nodes must be rejected")
	}
	days[0].Nodes = []Node{{ID: "n1", Label: "概念"}}
	if err := validateDays(days, 2); err != nil {
		t.Fatalf("valid days rejected: %v", err)
	}
}
func TestValidateDaysRejectsDuplicateTitles(t *testing.T) {
	days := []Day{{Day: 1, Title: "相同", Hook: "下一步", Nodes: []Node{{ID: "n1", Label: "A"}}}, {Day: 2, Title: "相同", Prerequisite: "相同", Hook: "结束", Nodes: []Node{{ID: "n2", Label: "B"}}}}
	if err := validateDays(days, 2); err == nil {
		t.Fatal("duplicate titles must be rejected")
	}
}