package service

import (
	"database/sql"
	"encoding/json"
	"errors"
	"testing"

	_ "modernc.org/sqlite"

	"cmautobuy/admin/repository"
)

func newCatalogTestDB(t *testing.T) *sql.DB {
	t.Helper()
	db, err := sql.Open("sqlite", ":memory:")
	if err != nil {
		t.Fatal(err)
	}
	db.SetMaxOpenConns(1)
	statements := []string{
		`CREATE TABLE shops(shop_id TEXT PRIMARY KEY,display_name TEXT,normalized_name TEXT,enabled INTEGER,created_by_user_id TEXT,created_at TEXT,updated_at TEXT)`,
		`CREATE TABLE shop_channel_aliases(alias_id TEXT PRIMARY KEY,shop_id TEXT,channel TEXT,alias_name TEXT,normalized_alias TEXT,enabled INTEGER,created_at TEXT,updated_at TEXT)`,
		`CREATE TABLE shopee_products(goods_id TEXT PRIMARY KEY,shop_id TEXT,title TEXT NOT NULL,shopee_status TEXT,main_sku_code TEXT,image_url TEXT,shopee_shop_name TEXT,image_source TEXT,image_observed_at TEXT,image_is_manual INTEGER DEFAULT 0,shop_name_source TEXT,shop_name_observed_at TEXT,shop_name_is_manual INTEGER DEFAULT 0,source TEXT,source_observed_at TEXT,pdd_goods_url TEXT,pdd_goods_id TEXT,deleted_at TEXT,deleted_by_user_id TEXT,created_at TEXT,updated_at TEXT)`,
		`CREATE TABLE shopee_skus(sku_id TEXT PRIMARY KEY,shopee_sku_id TEXT UNIQUE,goods_id TEXT NOT NULL,spec_raw TEXT,spec_key TEXT,color TEXT,size TEXT,advice TEXT,parse_ok INTEGER,sku_code TEXT,is_manual INTEGER,source TEXT,field_sources TEXT,field_observed_at TEXT,source_observed_at TEXT,created_at TEXT,updated_at TEXT,UNIQUE(goods_id,spec_key))`,
		`CREATE TABLE pdd_products(id INTEGER PRIMARY KEY AUTOINCREMENT,goods_id TEXT UNIQUE,url TEXT,title TEXT,shop_name TEXT,skus_json TEXT,collect_status TEXT,collect_msg TEXT,artifact_ref TEXT,collected_at TEXT,deleted_at TEXT,source TEXT,source_observed_at TEXT,created_at TEXT,updated_at TEXT)`,
		`CREATE TABLE catalog_import_runs(source TEXT,batch_id TEXT,request_hash TEXT,status TEXT,request_count INTEGER,conflict_count INTEGER,observed_at TEXT,update_policy TEXT DEFAULT 'fill_missing',last_request_at TEXT,last_conflict_at TEXT,shopee_created INTEGER DEFAULT 0,shopee_updated INTEGER DEFAULT 0,shopee_fields_filled INTEGER DEFAULT 0,shopee_fields_same_source_updated INTEGER DEFAULT 0,shopee_fields_manual_skipped INTEGER DEFAULT 0,shopee_fields_stale_skipped INTEGER DEFAULT 0,sku_created INTEGER DEFAULT 0,sku_updated INTEGER DEFAULT 0,sku_filled INTEGER DEFAULT 0,sku_same_source_updated INTEGER DEFAULT 0,sku_skipped INTEGER DEFAULT 0,sku_manual_skipped INTEGER DEFAULT 0,sku_stale_skipped INTEGER DEFAULT 0,pdd_created INTEGER DEFAULT 0,pdd_updated INTEGER DEFAULT 0,association_created INTEGER DEFAULT 0,association_unchanged INTEGER DEFAULT 0,failure_count INTEGER DEFAULT 0,error_summary TEXT,response_body TEXT,created_at TEXT,finished_at TEXT,PRIMARY KEY(source,batch_id))`,
	}
	for _, statement := range statements {
		if _, err := db.Exec(statement); err != nil {
			t.Fatal(err)
		}
	}
	t.Cleanup(func() { db.Close() })
	return db
}

func validCatalogBatch() CatalogBatchRequest {
	price := int64(1299)
	return CatalogBatchRequest{SchemaVersion: 1, BatchID: "batch-001", ObservedAt: "2026-08-11T08:00:00+08:00",
		ShopeeProducts: []CatalogShopeeProduct{{GoodsID: "S-1", Title: "蝦皮上衣"}},
		ShopeeSKUs:     []CatalogShopeeSKU{{SKUID: "SKU-1", GoodsID: "S-1", SpecRaw: "黑色,M", Color: "黑色", Size: "M", ParseOK: true}},
		PddProducts:    []CatalogPddProduct{{GoodsID: "P-1", URL: "https://mobile.yangkeduo.com/goods.html?goods_id=P-1", Title: "PDD上衣", Dimensions: []CatalogPddDimension{{Key: "color", Name: "颜色"}}, SKUs: []CatalogPddSKU{{Options: map[string]string{"color": "黑色"}, PriceCent: &price, Available: true}}}},
		Associations:   []CatalogAssociation{{ShopeeGoodsID: "S-1", PddGoodsID: "P-1"}}}
}

func TestImportCatalogBatch_原子写入重放与冲突(t *testing.T) {
	db := newCatalogTestDB(t)
	req := validCatalogBatch()
	raw, _ := json.Marshal(req)
	got, err := ImportCatalogBatch(db, "script-a", req, raw)
	if err != nil {
		t.Fatal(err)
	}
	if got.Counts.ShopeeCreated != 1 || got.Counts.SKUCreated != 1 || got.Counts.PddCreated != 1 || got.Counts.AssociationCreated != 1 {
		t.Fatalf("统计不正确：%+v", got)
	}
	replay, err := ImportCatalogBatch(db, "script-a", req, raw)
	if err != nil || !replay.Replayed {
		t.Fatalf("相同批次应重放：resp=%+v err=%v", replay, err)
	}
	changed := append([]byte{}, raw...)
	changed = append(changed, ' ')
	_, err = ImportCatalogBatch(db, "script-a", req, changed)
	var catalogErr *CatalogError
	if !errors.As(err, &catalogErr) || catalogErr.Code != "IDEMPOTENCY_CONFLICT" {
		t.Fatalf("不同内容应冲突：%v", err)
	}
	run, err := repository.GetCatalogImportRun(db, "script-a", req.BatchID)
	if err != nil || run.RequestCount != 3 || run.ConflictCount != 1 {
		t.Fatalf("批次计数不正确：%+v err=%v", run, err)
	}
	var pddID string
	if err := db.QueryRow(`SELECT pdd_goods_id FROM shopee_products WHERE goods_id='S-1'`).Scan(&pddID); err != nil || pddID != "P-1" {
		t.Fatalf("关联未写入：%q %v", pddID, err)
	}
}

func TestImportCatalogBatch_关联冲突整批回滚且同请求重放错误(t *testing.T) {
	db := newCatalogTestDB(t)
	now := "2026-08-11T00:00:00.000000000Z"
	_, _ = db.Exec(`INSERT INTO shopee_products(goods_id,title,source,pdd_goods_id,created_at,updated_at) VALUES('S-1','旧标题','report','P-OLD',?,?)`, now, now)
	_, _ = db.Exec(`INSERT INTO pdd_products(goods_id,url,collect_status,created_at,updated_at) VALUES('P-OLD','old','pending',?,?)`, now, now)
	req := validCatalogBatch()
	raw, _ := json.Marshal(req)
	_, err := ImportCatalogBatch(db, "script-a", req, raw)
	var first *CatalogError
	if !errors.As(err, &first) || first.Code != "ASSOCIATION_CONFLICT" {
		t.Fatalf("应返回关联冲突：%v", err)
	}
	var title string
	_ = db.QueryRow(`SELECT title FROM shopee_products WHERE goods_id='S-1'`).Scan(&title)
	if title != "旧标题" {
		t.Fatalf("失败批次必须整体回滚，title=%q", title)
	}
	_, err = ImportCatalogBatch(db, "script-a", req, raw)
	var replay *CatalogError
	if !errors.As(err, &replay) || replay.Code != first.Code || replay.Status != first.Status {
		t.Fatalf("失败重放应保持原错误：%+v", err)
	}
}

func TestValidateCatalogBatch_拒绝旧版超限和负金额(t *testing.T) {
	req := validCatalogBatch()
	req.SchemaVersion = 2
	if err := ValidateCatalogBatch(req); err == nil {
		t.Fatal("应拒绝未知 schema")
	}
	req = validCatalogBatch()
	negative := int64(-1)
	req.PddProducts[0].SKUs[0].PriceCent = &negative
	if err := ValidateCatalogBatch(req); err == nil {
		t.Fatal("应拒绝负金额")
	}
	req = validCatalogBatch()
	req.UpdatePolicy = "force_overwrite"
	if err := ValidateCatalogBatch(req); err == nil {
		t.Fatal("应拒绝强制覆盖策略")
	}
}

func TestImportCatalogBatch_无真实SKU并在后续补回同一记录(t *testing.T) {
	db := newCatalogTestDB(t)
	req := validCatalogBatch()
	req.BatchID = "missing-id"
	req.ShopeeSKUs[0].SKUID = ""
	raw, _ := json.Marshal(req)
	if got, err := ImportCatalogBatch(db, "script-a", req, raw); err != nil || got.Counts.SKUCreated != 1 {
		t.Fatalf("首次导入失败：%+v %v", got, err)
	}
	var recordID string
	if err := db.QueryRow(`SELECT sku_id FROM shopee_skus WHERE goods_id='S-1'`).Scan(&recordID); err != nil || recordID == "" {
		t.Fatalf("内部记录缺失：%q %v", recordID, err)
	}
	req.BatchID = "fill-real-id"
	req.ShopeeSKUs[0].SKUID = "REAL-1"
	raw, _ = json.Marshal(req)
	got, err := ImportCatalogBatch(db, "script-a", req, raw)
	if err != nil || got.Counts.SKUFilled != 1 {
		t.Fatalf("补真实 ID 失败：%+v %v", got, err)
	}
	var after, external string
	_ = db.QueryRow(`SELECT sku_id,shopee_sku_id FROM shopee_skus WHERE goods_id='S-1'`).Scan(&after, &external)
	if after != recordID || external != "REAL-1" {
		t.Fatalf("不应新建记录：before=%q after=%q external=%q", recordID, after, external)
	}
}

func TestImportCatalogBatch_三种策略和保护边界(t *testing.T) {
	db := newCatalogTestDB(t)
	req := validCatalogBatch()
	req.ShopeeSKUs[0].Color = ""
	raw, _ := json.Marshal(req)
	if _, err := ImportCatalogBatch(db, "script-a", req, raw); err != nil {
		t.Fatal(err)
	}

	fill := validCatalogBatch()
	fill.BatchID = "fill"
	fill.ShopeeSKUs[0].Color = "黑色"
	fill.ShopeeSKUs[0].Size = "L"
	raw, _ = json.Marshal(fill)
	got, err := ImportCatalogBatch(db, "script-a", fill, raw)
	if err != nil || got.Counts.SKUFilled != 1 {
		t.Fatalf("补空失败：%+v %v", got, err)
	}
	var color, size string
	_ = db.QueryRow(`SELECT color,size FROM shopee_skus`).Scan(&color, &size)
	if color != "黑色" || size != "M" {
		t.Fatalf("fill_missing 覆盖了非空字段：%q/%q", color, size)
	}

	insertOnly := validCatalogBatch()
	insertOnly.BatchID = "insert"
	insertOnly.UpdatePolicy = "insert_only"
	insertOnly.ShopeeSKUs[0].Color = "白色"
	raw, _ = json.Marshal(insertOnly)
	got, err = ImportCatalogBatch(db, "script-a", insertOnly, raw)
	if err != nil || got.Counts.SKUSkipped != 1 {
		t.Fatalf("insert_only 失败：%+v %v", got, err)
	}

	overwrite := validCatalogBatch()
	overwrite.BatchID = "overwrite"
	overwrite.UpdatePolicy = "overwrite_same_source"
	overwrite.ObservedAt = "2026-08-12T08:00:00+08:00"
	overwrite.ShopeeSKUs[0].Color = "白色"
	raw, _ = json.Marshal(overwrite)
	got, err = ImportCatalogBatch(db, "script-a", overwrite, raw)
	if err != nil || got.Counts.SKUSameSourceUpdated != 1 {
		t.Fatalf("同来源覆盖失败：%+v %v", got, err)
	}
	_ = db.QueryRow(`SELECT color FROM shopee_skus`).Scan(&color)
	if color != "白色" {
		t.Fatalf("color=%q", color)
	}
	stale := validCatalogBatch()
	stale.BatchID = "stale"
	stale.UpdatePolicy = "overwrite_same_source"
	stale.ObservedAt = "2026-08-11T12:00:00+08:00"
	stale.ShopeeSKUs[0].Color = "旧红色"
	raw, _ = json.Marshal(stale)
	got, err = ImportCatalogBatch(db, "script-a", stale, raw)
	if err != nil || got.Counts.SKUStaleSkipped != 1 {
		t.Fatalf("旧观测保护失败：%+v %v", got, err)
	}

	cross := validCatalogBatch()
	cross.BatchID = "cross-source"
	cross.ObservedAt = "2026-08-13T08:00:00+08:00"
	cross.ShopeeSKUs[0].Advice = "来源B建议"
	raw, _ = json.Marshal(cross)
	if _, err := ImportCatalogBatch(db, "script-b", cross, raw); err != nil {
		t.Fatal(err)
	}
	protect := validCatalogBatch()
	protect.BatchID = "protect-cross"
	protect.UpdatePolicy = "overwrite_same_source"
	protect.ObservedAt = "2026-08-14T08:00:00+08:00"
	protect.ShopeeSKUs[0].Advice = "来源A不得覆盖"
	raw, _ = json.Marshal(protect)
	if _, err := ImportCatalogBatch(db, "script-a", protect, raw); err != nil {
		t.Fatal(err)
	}
	var advice string
	_ = db.QueryRow(`SELECT advice FROM shopee_skus`).Scan(&advice)
	if advice != "来源B建议" {
		t.Fatalf("跨来源字段被覆盖：%q", advice)
	}

	_, _ = db.Exec(`UPDATE shopee_skus SET is_manual=1`)
	manual := validCatalogBatch()
	manual.BatchID = "manual"
	manual.ObservedAt = "2026-08-13T08:00:00+08:00"
	manual.ShopeeSKUs[0].Color = "红色"
	raw, _ = json.Marshal(manual)
	got, err = ImportCatalogBatch(db, "script-a", manual, raw)
	if err != nil || got.Counts.SKUManualSkipped != 1 {
		t.Fatalf("人工保护失败：%+v %v", got, err)
	}
}

func TestImportCatalogBatch_同规格不同真实SKU冲突并回滚(t *testing.T) {
	db := newCatalogTestDB(t)
	req := validCatalogBatch()
	raw, _ := json.Marshal(req)
	if _, err := ImportCatalogBatch(db, "script-a", req, raw); err != nil {
		t.Fatal(err)
	}
	req.BatchID = "conflict"
	req.ShopeeSKUs[0].SKUID = "SKU-2"
	req.ShopeeProducts[0].Title = "不应提交"
	raw, _ = json.Marshal(req)
	_, err := ImportCatalogBatch(db, "script-a", req, raw)
	var catalogErr *CatalogError
	if !errors.As(err, &catalogErr) || catalogErr.Status != 409 {
		t.Fatalf("应返回 409：%v", err)
	}
	var title string
	_ = db.QueryRow(`SELECT title FROM shopee_products WHERE goods_id='S-1'`).Scan(&title)
	if title != "蝦皮上衣" {
		t.Fatalf("冲突批次未整体回滚：%q", title)
	}
}

func TestImportCatalogBatch_蝦皮图片店铺分级更新和人工保护(t *testing.T) {
	db := newCatalogTestDB(t)
	base := validCatalogBatch()
	raw, _ := json.Marshal(base)
	if _, err := ImportCatalogBatch(db, "script-a", base, raw); err != nil {
		t.Fatal(err)
	}
	fill := validCatalogBatch()
	fill.BatchID = "product-fill"
	fill.ShopeeProducts[0].ImageURL = "https://img.example.com/a.jpg"
	fill.ShopeeProducts[0].ShopName = "蝦皮店铺A"
	raw, _ = json.Marshal(fill)
	got, err := ImportCatalogBatch(db, "script-a", fill, raw)
	if err != nil || got.Counts.ShopeeFieldsFilled != 2 {
		t.Fatalf("补空失败：%+v %v", got, err)
	}
	keep := validCatalogBatch()
	keep.BatchID = "product-keep"
	keep.ShopeeProducts[0].ImageURL = "https://img.example.com/b.jpg"
	keep.ShopeeProducts[0].ShopName = "店铺B"
	raw, _ = json.Marshal(keep)
	got, err = ImportCatalogBatch(db, "script-b", keep, raw)
	if err != nil || got.Counts.ShopeeFieldsFilled != 0 {
		t.Fatalf("默认策略不应覆盖：%+v %v", got, err)
	}
	cross := keep
	cross.BatchID = "product-cross"
	cross.UpdatePolicy = "overwrite_same_source"
	cross.ObservedAt = "2026-08-12T07:00:00+08:00"
	raw, _ = json.Marshal(cross)
	got, err = ImportCatalogBatch(db, "script-b", cross, raw)
	if err != nil || got.Counts.ShopeeFieldsSameSourceUpdated != 0 {
		t.Fatalf("跨来源不应覆盖：%+v %v", got, err)
	}
	insertOnly := keep
	insertOnly.BatchID = "product-insert-only"
	insertOnly.UpdatePolicy = "insert_only"
	raw, _ = json.Marshal(insertOnly)
	got, err = ImportCatalogBatch(db, "script-a", insertOnly, raw)
	if err != nil || got.Counts.ShopeeFieldsFilled != 0 || got.Counts.ShopeeFieldsSameSourceUpdated != 0 {
		t.Fatalf("insert_only 不应修改已有商品：%+v %v", got, err)
	}
	overwrite := keep
	overwrite.BatchID = "product-overwrite"
	overwrite.UpdatePolicy = "overwrite_same_source"
	overwrite.ObservedAt = "2026-08-12T08:00:00+08:00"
	raw, _ = json.Marshal(overwrite)
	got, err = ImportCatalogBatch(db, "script-a", overwrite, raw)
	if err != nil || got.Counts.ShopeeFieldsSameSourceUpdated != 2 {
		t.Fatalf("同来源更新失败：%+v %v", got, err)
	}
	var image, shop string
	_ = db.QueryRow(`SELECT image_url,shopee_shop_name FROM shopee_products WHERE goods_id='S-1'`).Scan(&image, &shop)
	if image != "https://img.example.com/b.jpg" || shop != "店铺B" {
		t.Fatalf("字段未更新：%q %q", image, shop)
	}
	stale := overwrite
	stale.BatchID = "product-stale"
	stale.ObservedAt = "2026-08-11T09:00:00+08:00"
	stale.ShopeeProducts[0].ImageURL = "https://img.example.com/old.jpg"
	stale.ShopeeProducts[0].ShopName = "旧店铺"
	raw, _ = json.Marshal(stale)
	got, err = ImportCatalogBatch(db, "script-a", stale, raw)
	if err != nil || got.Counts.ShopeeFieldsStaleSkipped != 2 {
		t.Fatalf("旧观测保护失败：%+v %v", got, err)
	}
	_, _ = db.Exec(`UPDATE shopee_products SET image_is_manual=1,shop_name_is_manual=1 WHERE goods_id='S-1'`)
	manual := overwrite
	manual.BatchID = "product-manual"
	manual.ObservedAt = "2026-08-13T08:00:00+08:00"
	manual.ShopeeProducts[0].ImageURL = "https://img.example.com/c.jpg"
	manual.ShopeeProducts[0].ShopName = "店铺C"
	raw, _ = json.Marshal(manual)
	got, err = ImportCatalogBatch(db, "script-a", manual, raw)
	if err != nil || got.Counts.ShopeeFieldsManualSkipped != 2 {
		t.Fatalf("人工保护失败：%+v %v", got, err)
	}
}

func TestValidateCatalogBatch_拒绝危险图片URL(t *testing.T) {
	for _, rawURL := range []string{"file:///tmp/a.jpg", "data:image/png;base64,AA", "https://user:pass@example.com/a.jpg", "https://example.com/a.jpg?access_token=secret", "javascript:alert(1)"} {
		req := validCatalogBatch()
		req.ShopeeProducts[0].ImageURL = rawURL
		if err := ValidateCatalogBatch(req); err == nil {
			t.Errorf("应拒绝 %q", rawURL)
		}
	}
	req := validCatalogBatch()
	req.ShopeeProducts[0].ImageURL = "https://img.example.com/a.jpg?v=1"
	if err := ValidateCatalogBatch(req); err != nil {
		t.Fatalf("合法图片被拒绝：%v", err)
	}
}