package repository

import (
	"encoding/json"
	"regexp"
	"strings"
	"testing"
	"time"

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

func TestMaterialRepoGetByIDReturnsOnlyMasterData(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

	query := `SELECT id, organization_id, material_code, name, material_image, spec, manufacturer_model,
		category_id, base_unit_id, unit, status, version, created_at, updated_at
		FROM materials WHERE id = ?`
	now := time.Date(2026, 9, 15, 9, 0, 0, 0, time.UTC)
	mock.ExpectQuery(regexp.QuoteMeta(query)).WithArgs(int64(7)).WillReturnRows(
		sqlmock.NewRows([]string{"id", "organization_id", "material_code", "name", "material_image", "spec", "manufacturer_model", "category_id", "base_unit_id", "unit", "status", "version", "created_at", "updated_at"}).
			AddRow(7, 1, "MAT-007", "轴承", nil, "6205", nil, 12, 3, "件", "active", 2, now, now),
	)

	var material model.Material
	if err := NewMaterialRepo().GetByID(7, &material); err != nil {
		t.Fatalf("get material: %v", err)
	}
	payload, err := json.Marshal(material)
	if err != nil {
		t.Fatalf("marshal material: %v", err)
	}
	if regexp.MustCompile(`current_stock|warning_stock`).Match(payload) {
		t.Fatalf("material payload leaks inventory fields: %s", payload)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}

func TestMaterialRepoRecognizesOnlyActiveSubcategories(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

	query := `SELECT EXISTS(
		SELECT 1 FROM material_categories
		WHERE id = ? AND organization_id = ? AND parent_id IS NOT NULL AND status = 'active'
	)`
	mock.ExpectQuery(regexp.QuoteMeta(query)).WithArgs(int64(12), int64(1)).
		WillReturnRows(sqlmock.NewRows([]string{"exists"}).AddRow(true))

	exists, err := NewMaterialRepo().IsActiveSubcategory(12, 1)
	if err != nil {
		t.Fatalf("check category: %v", err)
	}
	if !exists {
		t.Fatal("active subcategory should be accepted")
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}

const (
	obsoleteStockQuery = `SELECT COUNT(*) FROM inventory_balances WHERE material_id = ? AND (on_hand <> 0 OR reserved <> 0 OR locked <> 0 OR in_transit <> 0)`
	obsoleteUpdateStmt = `UPDATE materials SET status = 'obsolete', version = version + 1 WHERE id = ?`
)

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

func TestMaterialRepoObsoleteRejectsUnknownMaterial(t *testing.T) {
	mock, cleanup := newObsoleteMock(t)
	t.Cleanup(cleanup)

	mock.ExpectQuery(regexp.QuoteMeta(obsoleteStockQuery)).WithArgs(int64(999999)).
		WillReturnRows(sqlmock.NewRows([]string{"count"}).AddRow(0))
	mock.ExpectExec(regexp.QuoteMeta(obsoleteUpdateStmt)).WithArgs(int64(999999)).
		WillReturnResult(sqlmock.NewResult(0, 0))

	err := NewMaterialRepo().Obsolete(999999)
	if err == nil || !strings.Contains(err.Error(), "物料不存在") {
		t.Fatalf("obsoleting a missing material should report 物料不存在, got %v", err)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}

func TestMaterialRepoObsoleteUpdatesExistingMaterial(t *testing.T) {
	mock, cleanup := newObsoleteMock(t)
	t.Cleanup(cleanup)

	mock.ExpectQuery(regexp.QuoteMeta(obsoleteStockQuery)).WithArgs(int64(7)).
		WillReturnRows(sqlmock.NewRows([]string{"count"}).AddRow(0))
	mock.ExpectExec(regexp.QuoteMeta(obsoleteUpdateStmt)).WithArgs(int64(7)).
		WillReturnResult(sqlmock.NewResult(0, 1))

	if err := NewMaterialRepo().Obsolete(7); err != nil {
		t.Fatalf("obsolete existing material: %v", err)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}

func TestMaterialRepoObsoleteIsBlockedByStock(t *testing.T) {
	mock, cleanup := newObsoleteMock(t)
	t.Cleanup(cleanup)

	mock.ExpectQuery(regexp.QuoteMeta(obsoleteStockQuery)).WithArgs(int64(7)).
		WillReturnRows(sqlmock.NewRows([]string{"count"}).AddRow(1))

	err := NewMaterialRepo().Obsolete(7)
	if err == nil || !strings.Contains(err.Error(), "仍有库存") {
		t.Fatalf("obsoleting a stocked material should be blocked, got %v", err)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}