package repository

import (
	"crypto/rand"
	"database/sql"
	"encoding/hex"
	"os"
	"strings"
	"testing"

	"cmautobuy/admin/config"
	"cmautobuy/admin/model"
)

func newSybTestDB(t *testing.T) *sql.DB {
	t.Helper()
	if os.Getenv("CMAUTOBUY_MYSQL_TEST") != "1" {
		t.Skip("未启用真实 MySQL 8 集成测试")
	}
	cfg, err := config.LoadDatabaseFromEnv()
	if err != nil {
		t.Fatal(err)
	}
	if !strings.HasSuffix(cfg.Name, "_test") {
		t.Fatalf("MySQL 测试基础库名必须以 _test 结尾")
	}
	adminDB, err := OpenMySQL(cfg)
	if err != nil {
		t.Fatal(err)
	}
	random := make([]byte, 8)
	if _, err := rand.Read(random); err != nil {
		t.Fatal(err)
	}
	databaseName := cfg.Name + "_" + hex.EncodeToString(random)
	quotedName := "`" + strings.ReplaceAll(databaseName, "`", "``") + "`"
	if _, err := adminDB.Exec("CREATE DATABASE " + quotedName + " CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci"); err != nil {
		adminDB.Close()
		t.Fatal(err)
	}
	cfg.Name = databaseName
	db, err := OpenMySQL(cfg)
	if err != nil {
		adminDB.Exec("DROP DATABASE " + quotedName)
		adminDB.Close()
		t.Fatal(err)
	}
	if err := MigrateMySQL(db); err != nil {
		db.Close()
		adminDB.Exec("DROP DATABASE " + quotedName)
		adminDB.Close()
		t.Fatal(err)
	}
	t.Cleanup(func() {
		db.Close()
		if _, err := adminDB.Exec("DROP DATABASE " + quotedName); err != nil {
			t.Errorf("清理隔离 MySQL 测试库失败: %v", err)
		}
		adminDB.Close()
	})
	return db
}

func TestUpsertSybOrder_已有的ShopeeSKUID同步后仍在(t *testing.T) {
	// 这是工单 #46 最要紧的一条：shopee_sku_id 是人工规格匹配的结果，
	// 顺运宝同步绝不能把它覆盖成空值——覆盖了不会报错，等到建采购任务
	// 才会发现匹配成果被洗掉，那时已经找不回来了。
	db := newSybTestDB(t)

	first := model.SybOrder{
		SybID: "SYB-1", OrderNo: "ORDER-1", Title: "初始标题",
		ProductSpec: "黑色,M", ShopeeGoodsID: "50209124255",
		Quantity: 1, PriceTwdCent: 23900, ImageURL: "https://x/img.jpg",
		SybData: `{"stock":{}}`,
	}
	created, err := UpsertSybOrder(db, first)
	if err != nil {
		t.Fatalf("首次写入失败: %v", err)
	}
	if !created {
		t.Fatal("首次写入应该是新建")
	}

	// 模拟操作员在界面上完成了规格匹配，手工把 shopee_sku_id 填上。
	if _, err := db.Exec(`UPDATE syb_orders SET shopee_sku_id = ? WHERE syb_id = ?`,
		"TEST-SKU-123", "SYB-1"); err != nil {
		t.Fatalf("模拟人工匹配失败: %v", err)
	}

	// 再次同步：标题、数量、价格都变了（模拟顺运宝那边数据更新），
	// 但 upsert 调用方不会传 shopee_sku_id 的新值（顺运宝根本没有这个字段）。
	second := model.SybOrder{
		SybID: "SYB-1", OrderNo: "ORDER-1", Title: "更新后的标题",
		ProductSpec: "黑色,M", ShopeeGoodsID: "50209124255",
		Quantity: 3, PriceTwdCent: 25900, ImageURL: "https://x/img2.jpg",
		SybData: `{"stock":{"updated":true}}`,
		// 注意：这里刻意不设置 ShopeeSKUID（零值，即空字符串），
		// 模拟"同步流程从来不知道匹配结果，只管顺运宝返回的字段"。
	}
	created2, err := UpsertSybOrder(db, second)
	if err != nil {
		t.Fatalf("二次写入失败: %v", err)
	}
	if created2 {
		t.Fatal("二次写入应该是更新，不是新建")
	}

	var skuID, title string
	var qty int
	if err := db.QueryRow(`SELECT shopee_sku_id, title, quantity FROM syb_orders WHERE syb_id = ?`,
		"SYB-1").Scan(&skuID, &title, &qty); err != nil {
		t.Fatalf("查询失败: %v", err)
	}
	if skuID != "TEST-SKU-123" {
		t.Fatalf("shopee_sku_id 应该还是人工匹配的 TEST-SKU-123，实际 %q"+
			"——同步把匹配成果覆盖掉了，这是本工单最不能接受的问题", skuID)
	}
	// 其余允许覆盖的字段应该已经更新，证明这不是"upsert 整个没生效"的假通过。
	if title != "更新后的标题" || qty != 3 {
		t.Errorf("title/quantity 应该被同步更新，实际 title=%q quantity=%d", title, qty)
	}
}

func TestUpsertSybOrder_只更新Syb骨架标题(t *testing.T) {
	db := newSybTestDB(t)
	now := model.NowISO()
	if _, err := db.Exec(`INSERT INTO shopee_products(goods_id,title,source,created_at,updated_at) VALUES('SYB-P','旧骨架','syb',?,?),('API-P','正式标题','api',?,?)`, now, now, now, now); err != nil {
		t.Fatal(err)
	}
	for _, o := range []model.SybOrder{{SybID: "S1", OrderNo: "O1", Title: "新骨架", ProductSpec: "黑色,M", ShopeeGoodsID: "SYB-P", Quantity: 1, PriceTwdCent: 100, SybData: "{}"}, {SybID: "S2", OrderNo: "O2", Title: "顺运宝标题", ProductSpec: "白色,L", ShopeeGoodsID: "API-P", Quantity: 1, PriceTwdCent: 200, SybData: "{}"}} {
		if _, err := UpsertSybOrder(db, o); err != nil {
			t.Fatal(err)
		}
	}
	var sybTitle, apiTitle string
	_ = db.QueryRow(`SELECT title FROM shopee_products WHERE goods_id='SYB-P'`).Scan(&sybTitle)
	_ = db.QueryRow(`SELECT title FROM shopee_products WHERE goods_id='API-P'`).Scan(&apiTitle)
	if sybTitle != "新骨架" || apiTitle != "正式标题" {
		t.Fatalf("来源保护失败：syb=%q api=%q", sybTitle, apiTitle)
	}
}

func TestUpsertSybOrder_ShopeeGoodsID会被同步更新(t *testing.T) {
	db := newSybTestDB(t)

	if _, err := UpsertSybOrder(db, model.SybOrder{
		SybID: "SYB-2", OrderNo: "ORDER-2", ShopeeGoodsID: "11111111111", Quantity: 1,
		SybData: "{}",
	}); err != nil {
		t.Fatalf("首次写入失败: %v", err)
	}
	if _, err := UpsertSybOrder(db, model.SybOrder{
		SybID: "SYB-2", OrderNo: "ORDER-2", ShopeeGoodsID: "22222222222", Quantity: 1,
		SybData: "{}",
	}); err != nil {
		t.Fatalf("二次写入失败: %v", err)
	}

	var goodsID string
	if err := db.QueryRow(`SELECT shopee_goods_id FROM syb_orders WHERE syb_id = ?`,
		"SYB-2").Scan(&goodsID); err != nil {
		t.Fatalf("查询失败: %v", err)
	}
	if goodsID != "22222222222" {
		t.Errorf("shopee_goods_id 应该被同步更新为顺运宝返回的新值，实际 %q", goodsID)
	}
}

func TestUpsertSybOrder_重复同步同一订单行数不翻倍(t *testing.T) {
	db := newSybTestDB(t)

	for i := 0; i < 3; i++ {
		if _, err := UpsertSybOrder(db, model.SybOrder{
			SybID: "SYB-3", OrderNo: "ORDER-3", Quantity: 1, SybData: "{}",
		}); err != nil {
			t.Fatalf("第 %d 次写入失败: %v", i+1, err)
		}
	}

	n, err := CountSybOrdersTotal(db)
	if err != nil {
		t.Fatalf("统计失败: %v", err)
	}
	if n != 1 {
		t.Fatalf("重复同步同一个 syb_id 应该只有 1 行，实际 %d 行", n)
	}
}

func TestUpsertSybOrder_骨架失败时同事务不写订单(t *testing.T) {
	db := newSybTestDB(t)
	tx, err := db.Begin()
	if err != nil {
		t.Fatal(err)
	}
	if _, err := UpsertSybOrder(tx, model.SybOrder{
		SybID: "SYB-REJECT", OrderNo: "ORDER-REJECT", Title: "测试",
		ShopeeGoodsID: strings.Repeat("G", 192), ProductSpec: "黑色,M", Quantity: 1, SybData: "{}",
	}); err == nil {
		t.Fatal("骨架失败必须让订单写入失败")
	}
	tx.Rollback()
	var count int
	if err := db.QueryRow(`SELECT COUNT(*) FROM syb_orders WHERE syb_id='SYB-REJECT'`).Scan(&count); err != nil || count != 0 {
		t.Fatalf("失败后不应留下订单 count=%d err=%v", count, err)
	}
}

func TestSybSession_保存读取和清除(t *testing.T) {
	db := newSybTestDB(t)

	if got, err := GetSybSession(db, "tester"); err != nil || got != nil {
		t.Fatalf("没有会话时应该返回 (nil, nil)，实际 got=%v err=%v", got, err)
	}

	if err := SaveSybSession(db, "tester", `[{"name":"JSESSIONID","value":"abc"}]`, "2026-08-10T00:00:00Z"); err != nil {
		t.Fatalf("保存会话失败: %v", err)
	}

	got, err := GetSybSession(db, "tester")
	if err != nil {
		t.Fatalf("读取会话失败: %v", err)
	}
	if got == nil || got.ExpiresAt != "2026-08-10T00:00:00Z" {
		t.Fatalf("读取到的会话不对: %+v", got)
	}

	// upsert：同一用户名再保存一次应该覆盖，不是新增一行。
	if err := SaveSybSession(db, "tester", `[{"name":"JSESSIONID","value":"xyz"}]`, "2026-08-11T00:00:00Z"); err != nil {
		t.Fatalf("二次保存会话失败: %v", err)
	}
	got2, err := GetSybSession(db, "tester")
	if err != nil || got2 == nil || got2.ExpiresAt != "2026-08-11T00:00:00Z" {
		t.Fatalf("二次保存后应该读到新值: got=%+v err=%v", got2, err)
	}

	if err := DeleteSybSession(db, "tester"); err != nil {
		t.Fatalf("删除会话失败: %v", err)
	}
	if got3, err := GetSybSession(db, "tester"); err != nil || got3 != nil {
		t.Fatalf("删除后应该查不到，实际 got=%v err=%v", got3, err)
	}
}

func TestSybSyncState_首次为空之后可更新(t *testing.T) {
	db := newSybTestDB(t)

	_, found, err := GetSybLastSyncedAt(db)
	if err != nil {
		t.Fatalf("查询失败: %v", err)
	}
	if found {
		t.Fatal("从没同步过时 found 应该是 false")
	}

	if err := SetSybLastSyncedAt(db, "2026-08-09T14:30:00Z"); err != nil {
		t.Fatalf("更新失败: %v", err)
	}
	at, found, err := GetSybLastSyncedAt(db)
	if err != nil || !found || at != "2026-08-09T14:30:00Z" {
		t.Fatalf("读取错误: at=%q found=%v err=%v", at, found, err)
	}

	// 再更新一次，确认是 upsert 而不是报主键冲突。
	if err := SetSybLastSyncedAt(db, "2026-08-10T09:00:00Z"); err != nil {
		t.Fatalf("二次更新失败: %v", err)
	}
	at2, _, err := GetSybLastSyncedAt(db)
	if err != nil || at2 != "2026-08-10T09:00:00Z" {
		t.Fatalf("二次更新后应该读到新值: at2=%q err=%v", at2, err)
	}
}

func createSybSyncTestUser(t *testing.T, db *sql.DB) model.User {
	t.Helper()
	user := model.User{
		UserID: "USR-SYNC", Username: "buyer", PasswordHash: "test-hash",
		Role: model.RolePurchaser, Status: model.UserActive,
		PasswordChangedAt: "2026-08-09T00:00:00Z", CreatedAt: "2026-08-09T00:00:00Z",
		UpdatedAt: "2026-08-09T00:00:00Z",
	}
	if err := CreateInitialAdmin(db, user); err != nil {
		t.Fatalf("创建同步记录测试用户失败: %v", err)
	}
	return user
}

func TestSybSyncRun_创建完成并分页读取(t *testing.T) {
	db := newSybTestDB(t)
	user := createSybSyncTestUser(t, db)
	run := model.SybSyncRun{
		RunID: "SYB-RUN-1", UserID: user.UserID, DateFrom: "2026-08-07",
		DateTo: "2026-08-09", StartedAt: "2026-08-09T01:00:00Z",
	}
	if err := CreateSybSyncRun(db, run); err != nil {
		t.Fatalf("创建同步记录失败: %v", err)
	}
	if err := FinishSybSyncRun(db, model.SybSyncRun{
		RunID: "SYB-RUN-1", Status: model.SybSyncSucceeded,
		StockCount: 3, DetailCount: 4, Created: 2, Updated: 2, Skipped: 1,
		CursorAdvanced: true, FinishedAt: "2026-08-09T01:02:00Z",
	}); err != nil {
		t.Fatalf("完成同步记录失败: %v", err)
	}

	rows, err := ListSybSyncRuns(db, 10, 0)
	if err != nil || len(rows) != 1 {
		t.Fatalf("读取同步记录失败: rows=%+v err=%v", rows, err)
	}
	got := rows[0]
	if got.Username != "buyer" || got.Status != model.SybSyncSucceeded ||
		got.DetailCount != 4 || !got.CursorAdvanced || got.FinishedAt == "" {
		t.Fatalf("同步记录字段不正确: %+v", got)
	}
	if count, err := CountSybSyncRuns(db); err != nil || count != 1 {
		t.Fatalf("同步记录总数错误: count=%d err=%v", count, err)
	}
}

func TestInterruptRunningSybSyncRuns_只中断未完成记录(t *testing.T) {
	db := newSybTestDB(t)
	user := createSybSyncTestUser(t, db)
	for _, id := range []string{"RUNNING", "DONE"} {
		if err := CreateSybSyncRun(db, model.SybSyncRun{
			RunID: id, UserID: user.UserID, DateFrom: "2026-08-09", DateTo: "2026-08-09",
			StartedAt: "2026-08-09T01:00:00Z",
		}); err != nil {
			t.Fatal(err)
		}
	}
	if err := FinishSybSyncRun(db, model.SybSyncRun{
		RunID: "DONE", Status: model.SybSyncSucceeded, FinishedAt: "2026-08-09T01:01:00Z",
	}); err != nil {
		t.Fatal(err)
	}
	affected, err := InterruptRunningSybSyncRuns(db, "2026-08-09T02:00:00Z")
	if err != nil || affected != 1 {
		t.Fatalf("应该只中断一条 running 记录: affected=%d err=%v", affected, err)
	}
	rows, _ := ListSybSyncRuns(db, 10, 0)
	statuses := map[string]model.SybSyncRunStatus{}
	for _, row := range rows {
		statuses[row.RunID] = row.Status
	}
	if statuses["RUNNING"] != model.SybSyncInterrupted || statuses["DONE"] != model.SybSyncSucceeded {
		t.Fatalf("中断状态错误: %+v", statuses)
	}
}

func TestListSybOrders_关键字筛选订单号和标题(t *testing.T) {
	db := newSybTestDB(t)
	mustUpsert := func(sybID, orderNo, title string) {
		if _, err := UpsertSybOrder(db, model.SybOrder{
			SybID: sybID, OrderNo: orderNo, Title: title, Quantity: 1, SybData: "{}",
		}); err != nil {
			t.Fatalf("写入 %s 失败: %v", sybID, err)
		}
	}
	mustUpsert("SYB-A", "260728AAA", "纯棉上衣")
	mustUpsert("SYB-B", "260728BBB", "牛仔裤")

	rows, err := ListSybOrders(db, SybOrderFilter{Keyword: "AAA"}, 20, 0)
	if err != nil {
		t.Fatalf("查询失败: %v", err)
	}
	if len(rows) != 1 || rows[0].SybID != "SYB-A" {
		t.Fatalf("按订单号筛选应该只查到 SYB-A，实际 %+v", rows)
	}

	rows2, err := ListSybOrders(db, SybOrderFilter{Keyword: "牛仔"}, 20, 0)
	if err != nil {
		t.Fatalf("查询失败: %v", err)
	}
	if len(rows2) != 1 || rows2[0].SybID != "SYB-B" {
		t.Fatalf("按标题筛选应该只查到 SYB-B，实际 %+v", rows2)
	}
}