package model

// Integration tests for InvProduct model against the real dev database.
// These tests guard against model/schema drift (e.g. missing or extra columns).
//
// Run with the dev DB reachable:
//   go test ./model/ -run TestInvProduct -v
// Skip in CI where DB is unavailable:
//   go test ./model/ -short

import (
	"context"
	"database/sql"
	"fmt"
	"testing"
	"time"

	"github.com/zeromicro/go-zero/core/stores/cache"
	"github.com/zeromicro/go-zero/core/stores/redis"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
)

const testDSN = "root:muyu2026@tcp(127.0.0.1:13306)/muyu_wms?charset=utf8mb4&parseTime=true&loc=Asia%2FShanghai"

func newTestProductModel(t *testing.T) InvProductModel {
	t.Helper()
	conn := sqlx.NewMysql(testDSN)
	cacheConf := cache.CacheConf{{RedisConf: redis.RedisConf{Host: "127.0.0.1:6379", Type: "node"}, Weight: 100}}
	return NewInvProductModel(conn, cacheConf)
}

func uniqueID(prefix string) string {
	return fmt.Sprintf("%s_%d", prefix, time.Now().UnixNano())
}

// TestInvProductInsert verifies that Insert succeeds against the live DB schema.
// This catches model/schema drift like the cost_price column removal.
func TestInvProductInsert(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	m := newTestProductModel(t)
	ctx := context.Background()

	p := &InvProduct{
		ProductId:   uniqueID("pid"),
		ProductName: uniqueID("test_product"),
		ImageUrl:    "",
		Spec:        "100cm",
		Color:       "red",
		SalesPrice:  99.9,
		Remark:      sql.NullString{String: "test remark", Valid: true},
		Status:      1,
		TenantId:    "t_default_001",
	}

	result, err := m.Insert(ctx, p)
	if err != nil {
		t.Fatalf("Insert failed: %v", err)
	}
	id, _ := result.LastInsertId()
	if id == 0 {
		t.Fatal("expected non-zero LastInsertId")
	}
	t.Logf("inserted product id=%d", id)

	// cleanup
	t.Cleanup(func() { _ = m.Delete(ctx, id) })
}

// TestInvProductFindOne verifies Insert + FindOne round-trip.
func TestInvProductFindOne(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	m := newTestProductModel(t)
	ctx := context.Background()

	p := &InvProduct{
		ProductId:   uniqueID("pid"),
		ProductName: uniqueID("test_product"),
		Spec:        "200cm",
		Color:       "blue",
		SalesPrice:  49.5,
		Status:      1,
		TenantId:    "t_default_001",
	}

	res, err := m.Insert(ctx, p)
	if err != nil {
		t.Fatalf("Insert: %v", err)
	}
	id, _ := res.LastInsertId()
	t.Cleanup(func() { _ = m.Delete(ctx, id) })

	got, err := m.FindOne(ctx, id)
	if err != nil {
		t.Fatalf("FindOne: %v", err)
	}
	if got.ProductName != p.ProductName {
		t.Errorf("ProductName: got %q, want %q", got.ProductName, p.ProductName)
	}
	if got.SalesPrice != p.SalesPrice {
		t.Errorf("SalesPrice: got %v, want %v", got.SalesPrice, p.SalesPrice)
	}
}

// TestInvProductUpdate verifies Update writes back correctly.
func TestInvProductUpdate(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	m := newTestProductModel(t)
	ctx := context.Background()

	p := &InvProduct{
		ProductId:   uniqueID("pid"),
		ProductName: uniqueID("test_product"),
		Spec:        "50cm",
		Color:       "green",
		SalesPrice:  10.0,
		Status:      1,
		TenantId:    "t_default_001",
	}
	res, err := m.Insert(ctx, p)
	if err != nil {
		t.Fatalf("Insert: %v", err)
	}
	id, _ := res.LastInsertId()
	t.Cleanup(func() { _ = m.Delete(ctx, id) })

	got, err := m.FindOne(ctx, id)
	if err != nil {
		t.Fatalf("FindOne: %v", err)
	}
	got.SalesPrice = 25.0
	got.Remark = sql.NullString{String: "updated", Valid: true}

	if err := m.Update(ctx, got); err != nil {
		t.Fatalf("Update: %v", err)
	}

	updated, err := m.FindOne(ctx, id)
	if err != nil {
		t.Fatalf("FindOne after Update: %v", err)
	}
	if updated.SalesPrice != 25.0 {
		t.Errorf("SalesPrice after update: got %v, want 25.0", updated.SalesPrice)
	}
	if updated.Remark.String != "updated" {
		t.Errorf("Remark after update: got %q, want \"updated\"", updated.Remark.String)
	}
}

// TestInvProductBulkInsert verifies BulkInsert (used by the import flow).
func TestInvProductBulkInsert(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	m := newTestProductModel(t)
	ctx := context.Background()

	ids := make([]int64, 0, 3)
	products := make([]*InvProduct, 3)
	for i := range products {
		products[i] = &InvProduct{
			ProductId:   uniqueID(fmt.Sprintf("bulk_pid_%d", i)),
			ProductName: uniqueID(fmt.Sprintf("bulk_product_%d", i)),
			Spec:        "10cm",
			Color:       "white",
			SalesPrice:  float64(i+1) * 5.0,
			Status:      1,
			TenantId:    "t_default_001",
		}
	}

	affected, err := m.BulkInsert(ctx, products)
	if err != nil {
		t.Fatalf("BulkInsert: %v", err)
	}
	if affected != 3 {
		t.Errorf("BulkInsert: affected=%d, want 3", affected)
	}

	t.Cleanup(func() {
		for _, p := range products {
			row, err := m.FindOneByProductId(ctx, p.ProductId)
			if err == nil {
				_ = m.Delete(ctx, row.Id)
			}
		}
		_ = ids
	})
}

// TestInvProductSchemaColumns queries information_schema to assert the DB columns
// match what the InvProduct struct declares. Fails immediately on any mismatch.
func TestInvProductSchemaColumns(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	db, err := sql.Open("mysql", testDSN)
	if err != nil {
		t.Fatalf("open db: %v", err)
	}
	defer db.Close()

	rows, err := db.QueryContext(context.Background(),
		"SELECT COLUMN_NAME FROM information_schema.COLUMNS WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='inv_product' ORDER BY ORDINAL_POSITION")
	if err != nil {
		t.Fatalf("query schema: %v", err)
	}
	defer rows.Close()

	dbCols := map[string]bool{}
	for rows.Next() {
		var col string
		if err := rows.Scan(&col); err != nil {
			t.Fatalf("scan: %v", err)
		}
		dbCols[col] = true
	}

	// Columns that the InvProduct struct declares (via db tags).
	structCols := []string{
		"id", "product_id", "product_name", "image_url", "spec", "color",
		"sales_price", "remark", "status", "tenant_id", "created_at", "updated_at", "deleted_at",
	}

	for _, col := range structCols {
		if !dbCols[col] {
			t.Errorf("struct declares column %q but it does NOT exist in inv_product", col)
		}
	}

	// Also check for DB columns not in the struct (forward-drift guard).
	structSet := map[string]bool{}
	for _, c := range structCols {
		structSet[c] = true
	}
	for col := range dbCols {
		if !structSet[col] {
			t.Logf("WARNING: DB column %q exists but is not in the InvProduct struct", col)
		}
	}
}

// TestFindProductSummaryNoPans guards against the GROUP_CONCAT NULL scan bug:
// when a product has no pans, the LEFT JOIN produces NULL for pan.position and
// GROUP_CONCAT over all-NULL values returns NULL, which cannot be scanned into a
// Go string.  The fix wraps both GROUP_CONCAT calls with COALESCE(..., '').
func TestFindProductSummaryNoPans(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	m := newTestProductModel(t)
	ctx := context.Background()

	p := &InvProduct{
		ProductId:   uniqueID("pid_nopan"),
		ProductName: uniqueID("nopan_product"),
		Spec:        "50cm",
		Color:       "red",
		SalesPrice:  99.0,
		Status:      1,
		TenantId:    "t_default_001",
	}
	res, err := m.Insert(ctx, p)
	if err != nil {
		t.Fatalf("Insert: %v", err)
	}
	id, _ := res.LastInsertId()
	t.Cleanup(func() { _ = m.Delete(ctx, id) })

	list, err := m.FindProductSummary(ctx, "t_default_001")
	if err != nil {
		t.Fatalf("FindProductSummary returned error for product with no pans: %v", err)
	}

	var found *ProductSummary
	for _, s := range list {
		if s.ProductName == p.ProductName {
			found = s
			break
		}
	}
	if found == nil {
		t.Fatalf("product %q not found in summary (len=%d)", p.ProductName, len(list))
	}
	if found.ColorCount != 1 {
		t.Errorf("ColorCount: got %d, want 1", found.ColorCount)
	}
	if found.TotalPanCount != 0 {
		t.Errorf("TotalPanCount: got %d, want 0", found.TotalPanCount)
	}
	if found.Locations != "" {
		t.Errorf("Locations: got %q, want empty string", found.Locations)
	}
}

// TestFindColorDetailNoPans is the same NULL guard for the color-detail query.
func TestFindColorDetailNoPans(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	m := newTestProductModel(t)
	ctx := context.Background()

	p := &InvProduct{
		ProductId:   uniqueID("pid_color"),
		ProductName: uniqueID("color_nopan_product"),
		Spec:        "80cm",
		Color:       "blue",
		SalesPrice:  50.0,
		Status:      1,
		TenantId:    "t_default_001",
	}
	res, err := m.Insert(ctx, p)
	if err != nil {
		t.Fatalf("Insert: %v", err)
	}
	id, _ := res.LastInsertId()
	t.Cleanup(func() { _ = m.Delete(ctx, id) })

	list, err := m.FindColorDetail(ctx, "t_default_001", p.ProductName)
	if err != nil {
		t.Fatalf("FindColorDetail returned error for product with no pans: %v", err)
	}
	if len(list) != 1 {
		t.Fatalf("expected 1 color detail row, got %d", len(list))
	}
	if list[0].Color != "blue" {
		t.Errorf("Color: got %q, want %q", list[0].Color, "blue")
	}
	if list[0].Locations != "" {
		t.Errorf("Locations: got %q, want empty string", list[0].Locations)
	}
}