add command for fix stock log missmatch

cmd/fix-stock-log-drift/main.go

@@ -0,0 +1,387 @@
+// Command: fix-stock-log-drift
+//
+// Tujuan:
+//   Sinkronkan `stock_logs.stock` (running ledger) dengan `product_warehouses.qty`
+//   (FIFO truth) ketika keduanya drift.
+//
+// Drift biasanya terjadi karena bug di Recording-Edit (sebelum fix) yang
+// hanya menulis -decrease tanpa +increase saat in-place update. Akibatnya
+// running ledger di stock_logs tertinggal dari qty riil di product_warehouses.
+//
+// Cara kerja:
+//   1. Ambil product_warehouses.qty (sebagai truth)
+//   2. Ambil last_stock_log.stock
+//   3. Cari recording yang berkontribusi pada drift (untuk notes)
+//   4. Hitung drift = qty - last_stock_log.stock
+//   5. Jika drift != 0, insert 1 stock_log corrective:
+//        - drift > 0 → increase = drift
+//        - drift < 0 → decrease = |drift|
+//      stock akhir akan sama dengan qty (truth).
+//   Notes otomatis berisi daftar recording IDs yang berkontribusi pada drift.
+//
+// Mode:
+//   --apply=false  (default) → dry-run, hanya tampilkan rencana
+//   --apply=true            → eksekusi insert
+//
+// Contoh:
+//   go run cmd/fix-stock-log-drift/main.go --product-warehouse-id=1261
+//   go run cmd/fix-stock-log-drift/main.go --product-warehouse-id=1261 --apply
+//   go run cmd/fix-stock-log-drift/main.go --product-warehouse-id=1261 --apply \
+//       --actor-id=1 --notes="Koreksi manual drift"
+
+package main
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"log"
+	"math"
+	"os"
+	"strings"
+	"time"
+
+	"gitlab.com/mbugroup/lti-api.git/internal/config"
+	"gitlab.com/mbugroup/lti-api.git/internal/database"
+	entity "gitlab.com/mbugroup/lti-api.git/internal/entities"
+	"gitlab.com/mbugroup/lti-api.git/internal/utils"
+	"gorm.io/gorm"
+)
+
+const (
+	qtyEpsilon          = 1e-6
+	defaultActorID uint = 1
+	maxSuspectInNotes   = 30
+)
+
+type driftRow struct {
+	ProductWarehouseID uint    `gorm:"column:product_warehouse_id"`
+	ProductID          uint    `gorm:"column:product_id"`
+	ProductName        string  `gorm:"column:product_name"`
+	WarehouseName      string  `gorm:"column:warehouse_name"`
+	CurrentQty         float64 `gorm:"column:current_qty"`
+	LastLogStock       float64 `gorm:"column:last_log_stock"`
+	LastLogID          uint    `gorm:"column:last_log_id"`
+	FifoExpected       float64 `gorm:"column:fifo_expected"`
+}
+
+type suspectRecording struct {
+	RecordingID    uint    `gorm:"column:recording_id"`
+	FifoUsage      float64 `gorm:"column:fifo_usage"`
+	NetLogConsumed float64 `gorm:"column:net_log_consumed"`
+	Phantom        float64 `gorm:"column:phantom"`
+}
+
+func main() {
+	var (
+		productWarehouseID uint
+		apply              bool
+		actorID            uint
+		notes              string
+	)
+
+	flag.UintVar(&productWarehouseID, "product-warehouse-id", 0, "Target product_warehouse_id (required)")
+	flag.BoolVar(&apply, "apply", false, "Apply changes. If false, run as dry-run")
+	flag.UintVar(&actorID, "actor-id", defaultActorID, "User id yang akan dicatat sebagai created_by stock_log corrective")
+	flag.StringVar(&notes, "notes", "", "Custom notes untuk stock_log corrective (opsional, default=auto-generate dari data recording)")
+	flag.Parse()
+
+	notes = strings.TrimSpace(notes)
+	if err := validateFlags(productWarehouseID, actorID); err != nil {
+		log.Fatalf("invalid flags: %v", err)
+	}
+
+	ctx := context.Background()
+	db := database.Connect(config.DBHost, config.DBName)
+
+	row, err := loadDriftRow(ctx, db, productWarehouseID)
+	if err != nil {
+		log.Fatalf("failed to load product warehouse: %v", err)
+	}
+
+	suspects, err := loadSuspectRecordings(ctx, db, productWarehouseID)
+	if err != nil {
+		log.Fatalf("failed to load suspect recordings: %v", err)
+	}
+
+	drift := row.CurrentQty - row.LastLogStock
+
+	// Print info header
+	fmt.Printf("Mode: %s\n", modeLabel(apply))
+	fmt.Printf("Target product_warehouse_id: %d\n", productWarehouseID)
+	fmt.Printf("Product: %q\n", row.ProductName)
+	fmt.Printf("Warehouse: %q\n", row.WarehouseName)
+	fmt.Printf("Current qty (product_warehouses): %.3f\n", row.CurrentQty)
+	fmt.Printf("FIFO expected (sum total_qty - total_used): %.3f\n", row.FifoExpected)
+	fmt.Printf("Last stock_log: id=%d stock=%.3f\n", row.LastLogID, row.LastLogStock)
+	fmt.Printf("Drift (qty - last_log_stock): %+.3f\n", drift)
+
+	if !nearlyEqual(row.CurrentQty, row.FifoExpected) {
+		fmt.Println()
+		fmt.Println("⚠️  WARNING: product_warehouses.qty TIDAK match dengan FIFO expected.")
+		fmt.Println("   Disarankan jalankan dulu cmd/reflow-quantity-product-warehouse-from-stock-allocation")
+		fmt.Println("   sebelum fix stock_log drift, agar truth source-nya sudah benar.")
+	}
+
+	// Print suspect recordings
+	fmt.Println()
+	if len(suspects) > 0 {
+		totalPhantom := 0.0
+		for _, s := range suspects {
+			totalPhantom += s.Phantom
+		}
+		fmt.Printf("Suspect recordings (drift contributors): %d\n", len(suspects))
+		for _, s := range suspects {
+			fmt.Printf(
+				"  #%-6d  fifo=%-10.3f  net_log=%-10.3f  phantom=%+.3f\n",
+				s.RecordingID, s.FifoUsage, s.NetLogConsumed, s.Phantom,
+			)
+		}
+		fmt.Printf("Total suspect phantom: %+.3f\n", totalPhantom)
+	} else {
+		fmt.Println("Suspect recordings: none found (drift origin unknown)")
+	}
+	fmt.Println()
+
+	if nearlyEqual(drift, 0) {
+		fmt.Println("✓ Tidak ada drift. Stock_log sudah sinkron dengan product_warehouses.qty.")
+		fmt.Println("Summary: planned=0 inserted=0 skipped=1 failed=0")
+		return
+	}
+
+	// Build notes if not provided
+	if notes == "" {
+		notes = buildDefaultNotes(row, drift, suspects)
+	}
+
+	plan := buildCorrectiveLog(row, drift, actorID, notes)
+
+	fmt.Printf(
+		"PLAN insert stock_log:\n  pw=%d  increase=%.3f  decrease=%.3f  stock=%.3f\n  notes=%q\n",
+		plan.ProductWarehouseId,
+		plan.Increase,
+		plan.Decrease,
+		plan.Stock,
+		plan.Notes,
+	)
+
+	if !apply {
+		fmt.Println()
+		fmt.Println("Summary: planned=1 inserted=0 skipped=0 failed=0 (dry-run)")
+		return
+	}
+
+	if err := db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		// Re-check di dalam transaction agar aman dari race condition
+		current, err := loadDriftRow(ctx, tx, productWarehouseID)
+		if err != nil {
+			return fmt.Errorf("re-read product_warehouse_id=%d: %w", productWarehouseID, err)
+		}
+		currentDrift := current.CurrentQty - current.LastLogStock
+		if nearlyEqual(currentDrift, 0) {
+			fmt.Println("Drift hilang sebelum insert (kemungkinan ada operasi paralel). Skip.")
+			return nil
+		}
+		fresh := buildCorrectiveLog(current, currentDrift, actorID, notes)
+		if err := tx.Create(&fresh).Error; err != nil {
+			return fmt.Errorf("insert corrective stock_log for pw=%d: %w", productWarehouseID, err)
+		}
+		fmt.Printf(
+			"DONE inserted stock_log id=%d pw=%d increase=%.3f decrease=%.3f stock=%.3f\n",
+			fresh.Id,
+			fresh.ProductWarehouseId,
+			fresh.Increase,
+			fresh.Decrease,
+			fresh.Stock,
+		)
+		return nil
+	}); err != nil {
+		fmt.Println()
+		fmt.Println("Summary: planned=1 inserted=0 skipped=0 failed=1")
+		log.Printf("error: %v", err)
+		os.Exit(1)
+	}
+
+	fmt.Println()
+	fmt.Println("Summary: planned=1 inserted=1 skipped=0 failed=0")
+}
+
+func validateFlags(productWarehouseID uint, actorID uint) error {
+	if productWarehouseID == 0 {
+		return errors.New("--product-warehouse-id is required (must be > 0)")
+	}
+	if actorID == 0 {
+		return errors.New("--actor-id must be > 0")
+	}
+	return nil
+}
+
+func loadDriftRow(ctx context.Context, db *gorm.DB, productWarehouseID uint) (driftRow, error) {
+	row := driftRow{}
+
+	lastLogSub := db.WithContext(ctx).
+		Table("stock_logs").
+		Select("id, product_warehouse_id, stock").
+		Where("product_warehouse_id = ?", productWarehouseID).
+		Order("id DESC").
+		Limit(1)
+
+	fifoSub := db.WithContext(ctx).
+		Table("purchase_items").
+		Select(`
+			product_warehouse_id,
+			COALESCE(SUM(COALESCE(total_qty, 0) - COALESCE(total_used, 0)), 0) AS fifo_expected
+		`).
+		Where("product_warehouse_id = ?", productWarehouseID).
+		Group("product_warehouse_id")
+
+	if err := db.WithContext(ctx).
+		Table("product_warehouses pw").
+		Select(`
+			pw.id AS product_warehouse_id,
+			pw.product_id AS product_id,
+			COALESCE(p.name, '') AS product_name,
+			COALESCE(w.name, '') AS warehouse_name,
+			COALESCE(pw.qty, 0) AS current_qty,
+			COALESCE(last_log.stock, 0) AS last_log_stock,
+			COALESCE(last_log.id, 0) AS last_log_id,
+			COALESCE(fifo.fifo_expected, 0) AS fifo_expected
+		`).
+		Joins("LEFT JOIN products p ON p.id = pw.product_id").
+		Joins("LEFT JOIN warehouses w ON w.id = pw.warehouse_id").
+		Joins("LEFT JOIN (?) last_log ON last_log.product_warehouse_id = pw.id", lastLogSub).
+		Joins("LEFT JOIN (?) fifo ON fifo.product_warehouse_id = pw.id", fifoSub).
+		Where("pw.id = ?", productWarehouseID).
+		Scan(&row).Error; err != nil {
+		return row, err
+	}
+
+	if row.ProductWarehouseID == 0 {
+		return row, fmt.Errorf("product_warehouse_id=%d not found", productWarehouseID)
+	}
+
+	return row, nil
+}
+
+// loadSuspectRecordings mencari recording yang net stock_log consumed-nya
+// melebihi FIFO usage_qty — ini adalah recording yang berkontribusi pada drift
+// akibat bug Recording-Edit yang hanya menulis -decrease tanpa +increase.
+func loadSuspectRecordings(ctx context.Context, db *gorm.DB, productWarehouseID uint) ([]suspectRecording, error) {
+	rows := make([]suspectRecording, 0)
+	if err := db.WithContext(ctx).
+		Table("recording_stocks rs").
+		Select(`
+			rs.recording_id,
+			COALESCE(rs.usage_qty, 0) AS fifo_usage,
+			(
+				COALESCE(SUM(CASE WHEN sl.decrease > 0 THEN sl.decrease ELSE 0 END), 0) -
+				COALESCE(SUM(CASE WHEN sl.increase > 0 THEN sl.increase ELSE 0 END), 0)
+			) AS net_log_consumed,
+			(
+				COALESCE(SUM(CASE WHEN sl.decrease > 0 THEN sl.decrease ELSE 0 END), 0) -
+				COALESCE(SUM(CASE WHEN sl.increase > 0 THEN sl.increase ELSE 0 END), 0) -
+				COALESCE(rs.usage_qty, 0)
+			) AS phantom
+		`).
+		Joins(`
+			JOIN stock_logs sl ON sl.loggable_type = ?
+				AND sl.loggable_id = rs.recording_id
+				AND sl.product_warehouse_id = rs.product_warehouse_id
+		`, string(utils.StockLogTypeRecording)).
+		Where("rs.product_warehouse_id = ?", productWarehouseID).
+		Group("rs.recording_id, rs.usage_qty").
+		Having(`
+			ABS(
+				COALESCE(SUM(CASE WHEN sl.decrease > 0 THEN sl.decrease ELSE 0 END), 0) -
+				COALESCE(SUM(CASE WHEN sl.increase > 0 THEN sl.increase ELSE 0 END), 0) -
+				COALESCE(rs.usage_qty, 0)
+			) > ?
+		`, qtyEpsilon).
+		Order("rs.recording_id ASC").
+		Scan(&rows).Error; err != nil {
+		return nil, err
+	}
+	return rows, nil
+}
+
+// buildDefaultNotes membuat notes otomatis yang berisi penjelasan drift
+// beserta daftar recording_id yang berkontribusi + phantom amount masing-masing.
+func buildDefaultNotes(row driftRow, drift float64, suspects []suspectRecording) string {
+	sign := "+"
+	if drift < 0 {
+		sign = ""
+	}
+
+	var sb strings.Builder
+	sb.WriteString(fmt.Sprintf(
+		"Koreksi drift stock_log akibat bug Recording-Edit (in-place update menulis -decrease tanpa +increase). PW=%d (%s) drift=%s%.3f.",
+		row.ProductWarehouseID,
+		row.WarehouseName,
+		sign,
+		drift,
+	))
+
+	if len(suspects) == 0 {
+		return sb.String()
+	}
+
+	sb.WriteString(" Recordings affected:")
+
+	limit := len(suspects)
+	truncated := 0
+	if limit > maxSuspectInNotes {
+		truncated = limit - maxSuspectInNotes
+		limit = maxSuspectInNotes
+	}
+
+	for i := 0; i < limit; i++ {
+		s := suspects[i]
+		phantomSign := "+"
+		if s.Phantom < 0 {
+			phantomSign = ""
+		}
+		sb.WriteString(fmt.Sprintf(" #%d(%s%.0f)", s.RecordingID, phantomSign, s.Phantom))
+		if i < limit-1 || truncated > 0 {
+			sb.WriteString(",")
+		}
+	}
+
+	if truncated > 0 {
+		sb.WriteString(fmt.Sprintf(" ... (+%d more)", truncated))
+	}
+
+	sb.WriteString(".")
+	return sb.String()
+}
+
+func buildCorrectiveLog(row driftRow, drift float64, actorID uint, notes string) entity.StockLog {
+	corrective := entity.StockLog{
+		ProductWarehouseId: row.ProductWarehouseID,
+		CreatedBy:          actorID,
+		LoggableType:       string(utils.StockLogTypeAdjustment),
+		LoggableId:         0,
+		Stock:              row.CurrentQty,
+		Notes:              notes,
+		CreatedAt:          time.Now(),
+	}
+	if drift > 0 {
+		corrective.Increase = drift
+		corrective.Decrease = 0
+	} else {
+		corrective.Increase = 0
+		corrective.Decrease = -drift
+	}
+	return corrective
+}
+
+func modeLabel(apply bool) string {
+	if apply {
+		return "APPLY"
+	}
+	return "DRY-RUN"
+}
+
+func nearlyEqual(a, b float64) bool {
+	return math.Abs(a-b) <= qtyEpsilon
+}