Subversion Repositories SmartDukaan

import com.spice.profitmandi.common.exception.ProfitMandiBusinessException;

import com.spice.profitmandi.common.model.ProfitMandiConstants;

import com.spice.profitmandi.common.model.UserInfo;

import com.spice.profitmandi.dao.cart.CartService;

import com.spice.profitmandi.dao.cart.v2.CartValidationService;

import com.spice.profitmandi.dao.cart.v2.CheckoutValidationResult;

import com.spice.profitmandi.dao.cart.v2.OpenCartValidationResult;

import com.spice.profitmandi.dao.cart.v2.SaleType;

import com.spice.profitmandi.dao.entity.catalog.Item;

import com.spice.profitmandi.dao.entity.catalog.TagListing;

import com.spice.profitmandi.dao.entity.user.CartLine;

import com.spice.profitmandi.dao.model.CartItem;

import com.spice.profitmandi.dao.model.UserCart;

import com.spice.profitmandi.dao.repository.catalog.ItemRepository;

import com.spice.profitmandi.dao.repository.catalog.TagListingRepository;

import com.spice.profitmandi.dao.repository.dtr.UserAccountRepository;

import com.spice.profitmandi.dao.repository.user.CartLineRepository;

import com.spice.profitmandi.service.scheme.SchemeService;

import org.springframework.http.HttpStatus;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.HashSet;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.stream.Collectors;

import org.springframework.transaction.annotation.Transactional;

@Transactional(rollbackFor = Throwable.class)

    @Autowired

    private CartValidationService cartValidationService;

    @Autowired

    private UserAccountRepository userAccountRepository;

    @Autowired

    private CartService cartService;

    @Autowired

    private CartLineRepository cartLineRepository;

    @Autowired

    private ItemRepository itemRepository;

    @Autowired

    private TagListingRepository tagListingRepository;

    @Autowired

    private SchemeService schemeService;

    @Autowired

    private com.spice.profitmandi.dao.repository.user.CartRepository cartRepository;

    private static final int MRP_TAG_ID = 4;

    private static final double CARRY_BAG_THRESHOLD = 12000d;

    private static final float CARRY_BAG_PRICE = 0.01f;

    // =================================================================

    // Cart v2 redesign — two-step validation (open + checkout)

    // All endpoints require authentication. Guests are rejected with 401.

    // =================================================================

    /** STEP 1 — soft validation. Never blocks. Surfaces warnings for price drift,

     *  qty downgrade, OOS, unavailability. Refreshes last-seen price baseline

     *  used by Step 2 drift detection.

     *  Pincode is derived from the cart's bound address server-side; clients

     *  do not pass it. */

    @GetMapping("/cart/open")

    public ResponseEntity<?> openCart(HttpServletRequest request)

            throws ProfitMandiBusinessException {

        java.util.Optional<AuthCtx> auth = resolveAuth(request);

        if (!auth.isPresent()) return unauthorized();

        AuthCtx ctx = auth.get();

        OpenCartValidationResult result = cartValidationService.validateForOpen(

                ctx.cartId, ctx.storeId);

        return ResponseEntity.ok(ApiResponse.success(result));

    }

    /** STEP 2 — hard validation immediately before payment. Returns

     *  {@code valid=false} on any drift; user must hit {@code /cart/open}

     *  to re-confirm, then retry this endpoint. On pass, creates a 240s

     *  stock reservation and returns a {@code reservationId}.

     *  Procurement only — tertiary billing drafts check out via

     *  /v2/billing/drafts/{cartId}/commit. */

    @PostMapping("/cart/validate")

    public ResponseEntity<?> validateForCheckout(HttpServletRequest request,

                                                 @RequestParam(value = "addressId") long addressId)

            throws ProfitMandiBusinessException {

        java.util.Optional<AuthCtx> auth = resolveAuth(request);

        if (!auth.isPresent()) return unauthorized();

        AuthCtx ctx = auth.get();

        CheckoutValidationResult result = cartValidationService.validateForCheckout(

                ctx.cartId, ctx.userId, ctx.storeId, addressId, SaleType.PARTNER_PROCUREMENT);

        return ResponseEntity.ok(ApiResponse.success(result));

    }

    // -----------------------------------------------------------------

    // Cart mutations — productId-only payload. All return the freshly

    // hydrated cart (Step 1 result) so the client never keeps stale state.

    // -----------------------------------------------------------------

    /** Add a single product to the cart. Increments qty if already present. */

    @PostMapping("/cart/items")

    public ResponseEntity<?> addItem(HttpServletRequest request,

                                     @RequestBody AddCartItemRequest body)

            throws ProfitMandiBusinessException {

        java.util.Optional<AuthCtx> auth = resolveAuth(request);

        if (!auth.isPresent()) return unauthorized();

        AuthCtx ctx = auth.get();

        if (body == null || body.productId <= 0 || body.quantity <= 0) {

            throw new ProfitMandiBusinessException("body", body, "CART_ITEM_INVALID_PAYLOAD");

        }

        List<CartItem> desired = currentLinesAsItems(ctx.cartId);

        boolean found = false;

        for (CartItem existing : desired) {

            if (existing.getItemId() == body.productId) {

                existing.setQuantity(existing.getQuantity() + body.quantity);

                found = true;

                break;

            }

        }

        if (!found) {

            desired.add(new CartItem(body.quantity, body.productId));

        }

        return applyAndHydrate(ctx, desired);

    }

    /** Set a specific line's quantity. quantity=0 removes the line. */

    @PatchMapping("/cart/items/{productId}")

    public ResponseEntity<?> updateQuantity(HttpServletRequest request,

                                            @PathVariable int productId,

                                            @RequestParam int quantity)

            throws ProfitMandiBusinessException {

        java.util.Optional<AuthCtx> auth = resolveAuth(request);

        if (!auth.isPresent()) return unauthorized();

        AuthCtx ctx = auth.get();

        if (quantity < 0) {

            throw new ProfitMandiBusinessException("quantity", quantity, "CART_ITEM_NEGATIVE_QTY");

        }

        List<CartItem> desired = currentLinesAsItems(ctx.cartId);

        if (quantity == 0) {

            desired = desired.stream()

                    .filter(ci -> ci.getItemId() != productId)

                    .collect(Collectors.toList());

        } else {

            boolean found = false;

            for (CartItem existing : desired) {

                if (existing.getItemId() == productId) {

                    existing.setQuantity(quantity);

                    found = true;

                    break;

                }

            }

            if (!found) {

                desired.add(new CartItem(quantity, productId));

            }

        }

        return applyAndHydrate(ctx, desired);

    }

    /** Remove a single line by productId. */

    @DeleteMapping("/cart/items/{productId}")

    public ResponseEntity<?> removeItem(HttpServletRequest request,

                                        @PathVariable int productId)

            throws ProfitMandiBusinessException {

        java.util.Optional<AuthCtx> auth = resolveAuth(request);

        if (!auth.isPresent()) return unauthorized();

        AuthCtx ctx = auth.get();

        List<CartItem> desired = currentLinesAsItems(ctx.cartId).stream()

                .filter(ci -> ci.getItemId() != productId)

                .collect(Collectors.toList());

        return applyAndHydrate(ctx, desired);

    }

    /** Clear the entire cart. */

    @DeleteMapping("/cart")

    public ResponseEntity<?> clearCart(HttpServletRequest request)

            throws ProfitMandiBusinessException {

        java.util.Optional<AuthCtx> auth = resolveAuth(request);

        if (!auth.isPresent()) return unauthorized();

        AuthCtx ctx = auth.get();

        cartService.clearCart(ctx.cartId);

        return ResponseEntity.ok(ApiResponse.success(

                cartValidationService.validateForOpen(ctx.cartId, ctx.storeId)));

    }

    /**

     * Enriches each desired CartItem with the live selling price, runs the

     * procurement carry-bag rebalance, applies the change, then returns a

     * hydrated Step-1 view. /v2/cart/* is procurement-only; tertiary drafts

     * have their own controller.

     */

    private ResponseEntity<?> applyAndHydrate(AuthCtx ctx, List<CartItem> desired)

            throws ProfitMandiBusinessException {

        enrichPrices(ctx, desired);

        rebalanceCarryBag(desired);

        cartService.addItemsToCart(ctx.cartId, desired);

        return ResponseEntity.ok(ApiResponse.success(

                cartValidationService.validateForOpen(ctx.cartId, ctx.storeId)));

    }

    /**

     * Populates {@link CartItem#setSellingPrice(double)} for each non-carry-bag item

     * with the live (MOP - scheme cashback) figure. Preserves the existing value on

     * lookup miss so a partial-Solr outage doesn't zero out prices.

     */

    private void enrichPrices(AuthCtx ctx, List<CartItem> desired) throws ProfitMandiBusinessException {

        Set<Integer> itemIds = desired.stream()

                .filter(ci -> ci.getItemId() != ProfitMandiConstants.ITEM_CARRY_BAG)

                .map(CartItem::getItemId)

                .collect(Collectors.toSet());

        if (itemIds.isEmpty()) return;

        Map<Integer, TagListing> tagByItem = tagListingRepository

                .selectByItemIdsAndTagIds(itemIds, new HashSet<>(Arrays.asList(MRP_TAG_ID)))

                .stream()

                .collect(Collectors.toMap(TagListing::getItemId, x -> x, (a, b) -> a));

        Map<Integer, Item> items = itemRepository.selectByIds(itemIds).stream()

                .collect(Collectors.toMap(Item::getId, x -> x, (a, b) -> a));

        List<Integer> catalogIds = items.values().stream()

                .map(Item::getCatalogItemId).distinct().collect(Collectors.toList());

        Map<Integer, Float> cashbackByCatalog = schemeService.getCatalogSchemeCashBack(ctx.storeId, catalogIds);

        if (cashbackByCatalog == null) cashbackByCatalog = java.util.Collections.emptyMap();

        for (CartItem ci : desired) {

            if (ci.getItemId() == ProfitMandiConstants.ITEM_CARRY_BAG) continue;

            TagListing tl = tagByItem.get(ci.getItemId());

            Item it = items.get(ci.getItemId());

            if (tl == null || it == null) continue;

            float cashback = cashbackByCatalog.getOrDefault(it.getCatalogItemId(), 0f);

            ci.setSellingPrice(tl.getMop() - cashback);

        }

    }

    /**

     * Server-side port of the legacy Zustand carry-bag rule: any item with

     * sellingPrice > ₹12,000 needs one carry bag per unit. Runs BEFORE addItemsToCart

     * so the full-sync semantics keep the cart consistent in one round-trip.

     */

    private void rebalanceCarryBag(List<CartItem> desired) {

        int bagsNeeded = 0;

        for (CartItem ci : desired) {

            if (ci.getItemId() == ProfitMandiConstants.ITEM_CARRY_BAG) continue;

            if (ci.getSellingPrice() > CARRY_BAG_THRESHOLD) {

                bagsNeeded += ci.getQuantity();

            }

        }

        desired.removeIf(ci -> ci.getItemId() == ProfitMandiConstants.ITEM_CARRY_BAG);

        if (bagsNeeded > 0) {

            CartItem bag = new CartItem(bagsNeeded, ProfitMandiConstants.ITEM_CARRY_BAG);

            bag.setSellingPrice(CARRY_BAG_PRICE);

            desired.add(bag);

        }

    }

    private List<CartItem> currentLinesAsItems(int cartId) {

        List<CartLine> lines = cartLineRepository.selectAllByCart(cartId);

        if (lines == null) return new ArrayList<>();

        return lines.stream()

                .map(l -> {

                    CartItem ci = new CartItem(l.getQuantity(), l.getItemId());

                    ci.setSellingPrice(l.getActualPrice());

                    return ci;

                })

                .collect(Collectors.toList());

    }

    public static class AddCartItemRequest {

        public int productId;

        public int quantity;

    }

    // -----------------------------------------------------------------

    // Auth helpers — login is mandatory per product decision (2026-04-21).

    // Guest carts are not supported; unauthenticated requests get 401.

    //

    // Returns the auth context as an Optional rather than throwing, because

    // GlobalExceptionHandler's @ExceptionHandler(Exception.class) would

    // otherwise wrap any RuntimeException as HTTP 500 regardless of

    // @ResponseStatus annotations on the exception class.

    // -----------------------------------------------------------------

    private static final class AuthCtx {

        final int userId;

        final int storeId;

        final int cartId;

        AuthCtx(int userId, int storeId, int cartId) {

            this.userId = userId; this.storeId = storeId; this.cartId = cartId;

        }

    }

    /**

     * Resolves the authenticated partner's PROCUREMENT cart. v2/cart/* is

     * procurement-only. Tertiary billing drafts live under /v2/billing/* and

     * are resolved per-cartId there.

     */

    private java.util.Optional<AuthCtx> resolveAuth(HttpServletRequest request) {

        Object userIdAttr = request.getAttribute("userId");

        if (userIdAttr == null) {

            return java.util.Optional.empty();

        }

        int userId;

        try {

            userId = (int) userIdAttr;

        } catch (ClassCastException e) {

            return java.util.Optional.empty();

        }

        if (userId <= 0) {

            return java.util.Optional.empty();

        }

        Object userInfoAttr = request.getAttribute("userInfo");

        int storeId = userInfoAttr instanceof UserInfo ? ((UserInfo) userInfoAttr).getRetailerId() : 0;

        UserCart uc = userAccountRepository.getUserCart(userId);

        if (uc == null || uc.getCartId() <= 0) {

            return java.util.Optional.empty();

        }

        return java.util.Optional.of(new AuthCtx(userId, storeId, uc.getCartId()));

    }

    private ResponseEntity<?> unauthorized() {

        java.util.Map<String, Object> body = new java.util.HashMap<>();

        body.put("responseStatus", "FAILURE");

        body.put("statusCode", 401);

        body.put("statusMessage", "LOGIN_REQUIRED");

        body.put("message", "Authentication is required. Send a valid Auth-Token header.");

        return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body(body);

    }