package workflowdef_test

import (
	"context"
	"testing"
	"time"

	"github.com/jackc/pgx/v5/pgxpool"

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

func openPool(t *testing.T) *pgxpool.Pool {
	t.Helper()
	dsn := db.SkipIfNoTestDatabaseURL(t)
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	pool, err := pgxpool.New(ctx, dsn)
	if err != nil {
		t.Skip(err)
	}
	if err := pool.Ping(ctx); err != nil {
		pool.Close()
		t.Skip(err)
	}
	if !workflowdef.TablesReady(ctx, pool) {
		pool.Close()
		t.Skip("workflowdef tables not migrated")
	}
	return pool
}

func TestPublishVersion_ImmutableAfterPublish(t *testing.T) {
	pool := openPool(t)
	if pool == nil {
		return
	}
	defer pool.Close()
	ctx := context.Background()
	svc := workflowdef.NewService(pool, nil)
	key := "test_wf_" + time.Now().Format("150405")
	defer func() {
		_, _ = pool.Exec(ctx, `DELETE FROM workflow_versions WHERE workflow_id IN (SELECT id FROM workflow_definitions WHERE def_key = $1)`, key)
		_, _ = pool.Exec(ctx, `DELETE FROM workflow_definitions WHERE def_key = $1`, key)
	}()
	def, ver, err := svc.CreateDefinition(ctx, workflowdef.CreateDefinitionInput{
		Key: key, Name: "测试工作流",
		Definition: workflowdef.VersionDefinition{
			SchemaVersion: 1,
			Stages: []workflowdef.StageDef{{
				Key: "s1", Position: 0,
				DocTasks: []workflowdef.DocTaskDef{{
					Key: "t1", DefaultEnabled: true, OutputDocType: "d1", OutputDocTitle: "D1",
				}},
			}},
		},
	}, 1)
	if err != nil {
		t.Fatalf("create: %v", err)
	}
	published, err := svc.PublishVersion(ctx, def.ID, ver.Version, 1)
	if err != nil {
		t.Fatalf("publish: %v", err)
	}
	if published.Status != workflowdef.StatusPublished {
		t.Fatalf("expected published, got %s", published.Status)
	}
	_, err = svc.UpdateDraft(ctx, def.ID, ver.Version, published.Definition)
	if err == nil {
		t.Fatal("expected update on published version to fail")
	}
}