//go:build integration

// 集成测试：街拍草稿主副图分组需要真实 PostgreSQL。
//
// 运行方式（先起库并确保结构已就绪，见 README「数据库」一节）：
//
//	docker compose -f scripts/pgvector/docker-compose.yml up -d
//	go test -tags integration ./internal/repository/ -run TestStreetMainDetail -v
//
// 默认 `go test ./...` 不会编译本文件（build tag 隔离）。
package repository

import (
	"context"
	"errors"
	"testing"

	"fashionapi/internal/model"
)

// seedStreetDraft 插入一条街拍草稿并返回其 id。
func seedStreetDraft(t *testing.T, repo ReviewRepository) uint32 {
	t.Helper()
	ctx := context.Background()
	db := repo.(*reviewRepository).db
	d := model.StreetSnapDraft{Title: "主副图测试", Year: 2026, City: "TestCity", Status: model.DraftStatusPending}
	if err := db.WithContext(ctx).Create(&d).Error; err != nil {
		t.Fatalf("插入草稿失败: %v", err)
	}
	t.Cleanup(func() {
		db.Exec("DELETE FROM street_snap_draft_images WHERE draft_id = ?", d.ID)
		db.Exec("DELETE FROM street_snap_drafts WHERE id = ?", d.ID)
	})
	return d.ID
}

// seedStreetDraftImage 插入一张草稿图并返回其行 id。
func seedStreetDraftImage(t *testing.T, repo ReviewRepository, draftID uint32, name string, order uint32) uint32 {
	t.Helper()
	img := model.StreetSnapDraftImage{DraftID: draftID, Image: name + ".jpg", Name: name, SortOrder: order}
	if err := repo.(*reviewRepository).db.WithContext(context.Background()).Create(&img).Error; err != nil {
		t.Fatalf("插入草稿图失败: %v", err)
	}
	return img.ID
}

// reloadStreetImages 取草稿的全部图（按 sort_order, id 升序），便于断言。
func reloadStreetImages(t *testing.T, repo ReviewRepository, draftID uint32) []model.StreetSnapDraftImage {
	t.Helper()
	imgs, err := repo.StreetDraftImages(context.Background(), draftID)
	if err != nil {
		t.Fatalf("读草稿图失败: %v", err)
	}
	return imgs
}

// TestStreetMainDetail 覆盖批量并入 / 并入上一张 / 拆出 / 跨草稿拦截四条主线。
func TestStreetMainDetail(t *testing.T) {
	repo := NewReviewRepository(testDB(t))
	ctx := context.Background()

	draftID := seedStreetDraft(t, repo)
	m1 := seedStreetDraftImage(t, repo, draftID, "a", 1)
	d2 := seedStreetDraftImage(t, repo, draftID, "b", 2)
	d3 := seedStreetDraftImage(t, repo, draftID, "c", 3)

	if err := repo.AttachStreetDraftImages(ctx, draftID, m1, []uint32{d2, d3}); err != nil {
		t.Fatalf("并入失败: %v", err)
	}
	for _, im := range reloadStreetImages(t, repo, draftID) {
		switch im.ID {
		case m1:
			if im.IsDetail != 0 || im.ParentImageID != 0 {
				t.Fatalf("主图应保持 is_detail=0/parent=0，实际 %d/%d", im.IsDetail, im.ParentImageID)
			}
		case d2, d3:
			if im.IsDetail != 1 || im.ParentImageID != m1 {
				t.Fatalf("副图应指向 %d，实际 is_detail=%d parent=%d", m1, im.IsDetail, im.ParentImageID)
			}
		}
	}

	// 幂等：重复并入同一批不报错，结果不变。
	if err := repo.AttachStreetDraftImages(ctx, draftID, m1, []uint32{d2, d3}); err != nil {
		t.Fatalf("重复并入应幂等，实际报错: %v", err)
	}

	// 传入主图自身：调用方过滤掉的语义由仓储兜住（id <> main 条件），不报错也不改动主图。
	if err := repo.AttachStreetDraftImages(ctx, draftID, m1, []uint32{m1}); err != nil {
		t.Fatalf("并入集合含主图自身应被忽略而非报错: %v", err)
	}
	for _, im := range reloadStreetImages(t, repo, draftID) {
		if im.ID == m1 && (im.IsDetail != 0 || im.ParentImageID != 0) {
			t.Fatalf("主图被自身并入后不应变化")
		}
	}

	// 拆出：把 d3 恢复为主图。
	if err := repo.DetachStreetDraftImage(ctx, draftID, d3); err != nil {
		t.Fatalf("拆出失败: %v", err)
	}
	for _, im := range reloadStreetImages(t, repo, draftID) {
		if im.ID == d3 && (im.IsDetail != 0 || im.ParentImageID != 0) {
			t.Fatalf("拆出后应为 is_detail=0/parent=0，实际 %d/%d", im.IsDetail, im.ParentImageID)
		}
	}
	if err := repo.DetachStreetDraftImage(ctx, draftID, m1); err != nil { // 对主图幂等成功
		t.Fatalf("对主图拆出应幂等成功: %v", err)
	}

	// 跨草稿拦截：空集合 + 跨草稿主图。
	if err := repo.AttachStreetDraftImages(ctx, draftID, m1, nil); !errors.Is(err, ErrInvalidImageGroup) {
		t.Fatalf("空集合应返回 ErrInvalidImageGroup，实际 %v", err)
	}
	otherMain := seedStreetDraftImage(t, repo, seedStreetDraft(t, repo), "x", 1)
	if err := repo.AttachStreetDraftImages(ctx, draftID, otherMain, []uint32{d2}); !errors.Is(err, ErrInvalidImageGroup) {
		t.Fatalf("跨草稿主图应被拦截，实际 %v", err)
	}
}

// TestStreetMainDetailReparentGrandchildren 并入一张自带副图的主图时，其原副图应改挂到新主图。
func TestStreetMainDetailReparentGrandchildren(t *testing.T) {
	repo := NewReviewRepository(testDB(t))
	ctx := context.Background()

	draftID := seedStreetDraft(t, repo)
	m1 := seedStreetDraftImage(t, repo, draftID, "m1", 1)
	m2 := seedStreetDraftImage(t, repo, draftID, "m2", 2)
	child := seedStreetDraftImage(t, repo, draftID, "child", 3)

	if err := repo.AttachStreetDraftImages(ctx, draftID, m2, []uint32{child}); err != nil {
		t.Fatalf("预置副图失败: %v", err)
	}
	if err := repo.AttachStreetDraftImages(ctx, draftID, m1, []uint32{m2}); err != nil {
		t.Fatalf("并入整组失败: %v", err)
	}
	for _, im := range reloadStreetImages(t, repo, draftID) {
		if im.ID == m2 && (im.IsDetail != 1 || im.ParentImageID != m1) {
			t.Fatalf("m2 应成为 m1 的副图，实际 %d/%d", im.IsDetail, im.ParentImageID)
		}
		if im.ID == child && (im.IsDetail != 1 || im.ParentImageID != m1) {
			t.Fatalf("child 应改挂到 m1，实际 %d/%d", im.IsDetail, im.ParentImageID)
		}
	}
}

// TestStreetPromoteRebuildsParentRef 晋升时必须把副图的父引用从「草稿行 id」改写为「新正式行 id」。
func TestStreetPromoteRebuildsParentRef(t *testing.T) {
	repo := NewReviewRepository(testDB(t))
	ctx := context.Background()

	draftID := seedStreetDraft(t, repo)
	m1 := seedStreetDraftImage(t, repo, draftID, "main", 1)
	d2 := seedStreetDraftImage(t, repo, draftID, "detail-a", 2)
	d3 := seedStreetDraftImage(t, repo, draftID, "detail-b", 3)
	if err := repo.AttachStreetDraftImages(ctx, draftID, m1, []uint32{d2, d3}); err != nil {
		t.Fatalf("预置主副图失败: %v", err)
	}

	snapID, err := repo.SaveStreetSnapFromDraft(ctx, draftID)
	if err != nil {
		t.Fatalf("晋升失败: %v", err)
	}
	t.Cleanup(func() {
		db := repo.(*reviewRepository).db
		db.Exec("DELETE FROM street_snap_images WHERE snap_id = ?", snapID)
		db.Exec("DELETE FROM street_snaps WHERE id = ?", snapID)
	})

	db := repo.(*reviewRepository).db
	var rows []model.StreetSnapImage
	if err := db.WithContext(ctx).Where("snap_id = ? AND is_deleted = 0", snapID).
		Order("sort_order ASC, id ASC").Find(&rows).Error; err != nil {
		t.Fatalf("读正式图失败: %v", err)
	}
	if len(rows) != 3 {
		t.Fatalf("期望 3 行正式图，实际 %d", len(rows))
	}

	mainRow := rows[0]
	if mainRow.IsDetail != 0 || mainRow.ParentImageID != 0 {
		t.Fatalf("首行应是主图，实际 is_detail=%d parent=%d", mainRow.IsDetail, mainRow.ParentImageID)
	}
	for _, row := range rows[1:] {
		if row.IsDetail != 1 {
			t.Fatalf("第 %d 行应是副图", row.ID)
		}
		if row.ParentImageID != mainRow.ID {
			t.Fatalf("副图 parent 应指向新主图行 id %d，实际 %d", mainRow.ID, row.ParentImageID)
		}
	}
}