package repository

import (
	"regexp"
	"testing"

	"github.com/DATA-DOG/go-sqlmock"
	"github.com/wmms/wmms/pkg/database"
)

const stockByMaterialSQL = `SELECT m.id, m.material_code, m.name, m.spec, m.category, m.unit,
		COALESCE(SUM(ib.on_hand), 0), COALESCE(MAX(swr.minimum_available), 0)
		FROM materials m
		LEFT JOIN inventory_balances ib ON ib.material_id = m.id
		LEFT JOIN stock_warning_rules swr ON swr.organization_id = ib.organization_id
			AND swr.warehouse_id = ib.warehouse_id AND swr.material_id = m.id AND swr.enabled = TRUE
		WHERE m.id = ?
		GROUP BY m.id, m.material_code, m.name, m.spec, m.category, m.unit`

func TestStockRepoGetByMaterialIDReadsInventoryTables(t *testing.T) {
	db, mock, err := sqlmock.New()
	if err != nil {
		t.Fatalf("open sql mock: %v", err)
	}
	t.Cleanup(func() {
		database.DB = nil
		db.Close()
	})
	database.DB = db

	mock.ExpectQuery(regexp.QuoteMeta(stockByMaterialSQL)).WithArgs(int64(9)).WillReturnRows(
		sqlmock.NewRows([]string{"id", "material_code", "name", "spec", "category", "unit", "on_hand", "minimum_available"}).
			AddRow(9, "MAT-009", "电机", "80W", "A03", "台", 12, 3),
	)

	stock, err := NewStockRepo().GetByMaterialID(9)
	if err != nil {
		t.Fatalf("get stock: %v", err)
	}
	if stock.CurrentStock != 12 || stock.WarningStock != 3 {
		t.Fatalf("unexpected stock quantities: %+v", stock)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}

func TestStockRepoUpdateStockTxWritesDefaultInventoryBalance(t *testing.T) {
	db, mock, err := sqlmock.New()
	if err != nil {
		t.Fatalf("open sql mock: %v", err)
	}
	t.Cleanup(func() {
		database.DB = nil
		db.Close()
	})
	database.DB = db

	mock.ExpectBegin()
	tx, err := db.Begin()
	if err != nil {
		t.Fatalf("begin: %v", err)
	}
	query := `INSERT INTO inventory_balances (organization_id, warehouse_id, location_id, material_id, on_hand)
		SELECT o.id, w.id, l.id, ?, ?
		FROM organizations o
		JOIN warehouses w ON w.organization_id = o.id AND w.code = 'DEFAULT'
		JOIN warehouse_locations l ON l.warehouse_id = w.id AND l.code = 'MAIN'
		WHERE o.code = 'DEFAULT'
		ON DUPLICATE KEY UPDATE on_hand = on_hand + VALUES(on_hand), version = version + 1`
	mock.ExpectExec(regexp.QuoteMeta(query)).WithArgs(int64(11), 5).WillReturnResult(sqlmock.NewResult(1, 1))

	if err := NewStockRepo().UpdateStockTx(tx, 11, 5); err != nil {
		t.Fatalf("update inventory balance: %v", err)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}