package com.baiyue.lastleg.controller;

import com.baiyue.common.core.api.ApiResponse;
import com.baiyue.common.core.api.PageResult;
import com.baiyue.common.event.EventEnvelope;
import com.baiyue.common.security.AuthenticatedUser;
import com.baiyue.lastleg.dto.LastlegOrderDetailResponse;
import com.baiyue.lastleg.dto.LastlegOrderRequests;
import com.baiyue.lastleg.dto.LastlegOrderSummary;
import com.baiyue.lastleg.security.InternalServiceTokenGuard;
import com.baiyue.lastleg.security.OverseasPermissions;
import com.baiyue.lastleg.service.LastlegOrderService;
import com.baiyue.lastleg.service.LoadingCompletedConsumer;
import com.baiyue.lastleg.shipping.service.ContainerShippingNodeConsumer;
import com.baiyue.common.event.EventTypes;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.validation.Valid;
import jakarta.annotation.Resource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.security.core.annotation.AuthenticationPrincipal;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.server.ResponseStatusException;

import java.nio.charset.StandardCharsets;

@RestController
@Tag(name = "Tail-leg orders")
public class LastlegOrderController {
    @Resource private LoadingCompletedConsumer consumer;
    @Resource private ContainerShippingNodeConsumer shippingNodeConsumer;
    @Resource private LastlegOrderService orderService;
    @Resource private InternalServiceTokenGuard tokenGuard;

    @PostMapping("/internal/lastleg/events")
    @Operation(summary = "Receive a first-leg loading or actual shipping-node event",
        description = "Accepts loading-completed V1/V2 and FirstLegContainerShippingNodeRecorded V1 through the internal token boundary; only monotonic actual PICKUP_READY-or-later facts open overseas PDA receiving.")
    public ApiResponse<Integer> receive(
        @RequestHeader(value = "X-Internal-Service-Token", required = false) String token,
        @RequestBody EventEnvelope event) {
        tokenGuard.verify(token);
        int consumed = EventTypes.FIRST_LEG_CONTAINER_SHIPPING_NODE_RECORDED.equals(event.eventType())
            ? shippingNodeConsumer.consume(event) : consumer.consume(event);
        return ApiResponse.success(consumed);
    }

    @GetMapping("/api/platform/v1/last-leg/orders")
    @PreAuthorize("hasAuthority('" + OverseasPermissions.LAST_MILE_ORDER_LIST + "')")
    @Operation(summary = "Page tail-leg order rows", description = "Required authority: " + OverseasPermissions.LAST_MILE_ORDER_LIST)
    public ApiResponse<PageResult<LastlegOrderSummary>> list(
        @AuthenticationPrincipal AuthenticatedUser user,
        @RequestParam(required = false) String customerId,
        @Valid LastlegOrderRequests.Query query) {
        return ApiResponse.success(orderService.page(platformScope(user, customerId), query));
    }

    @GetMapping("/api/platform/v1/last-leg/orders/{id}")
    @PreAuthorize("hasAuthority('" + OverseasPermissions.LAST_MILE_ORDER_LIST + "')")
    @Operation(summary = "Get one inbound-code-level tail-leg order", description = "Required authority: " + OverseasPermissions.LAST_MILE_ORDER_LIST)
    public ApiResponse<LastlegOrderDetailResponse> detail(
        @AuthenticationPrincipal AuthenticatedUser user,
        @RequestParam(required = false) String customerId,
        @PathVariable long id) {
        return ApiResponse.success(orderService.detail(platformScope(user, customerId), id));
    }

    @GetMapping(value = "/api/platform/v1/last-leg/orders/export", produces = "text/csv")
    @PreAuthorize("hasAuthority('" + OverseasPermissions.LAST_MILE_ORDER_EXPORT + "')")
    @Operation(summary = "Export filtered tail-leg orders as UTF-8 CSV", description = "Required authority: " + OverseasPermissions.LAST_MILE_ORDER_EXPORT)
    public ResponseEntity<byte[]> export(
        @AuthenticationPrincipal AuthenticatedUser user,
        @RequestParam(required = false) String customerId,
        @Valid LastlegOrderRequests.Query query) {
        byte[] body = orderService.exportCsv(platformScope(user, customerId), query);
        return ResponseEntity.ok()
            .contentType(new MediaType("text", "csv", StandardCharsets.UTF_8))
            .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=lastleg-orders.csv")
            .body(body);
    }

    @PutMapping("/api/platform/v1/last-leg/orders/{id}/destination")
    @PreAuthorize("hasAuthority('" + OverseasPermissions.LAST_MILE_ORDER_EDIT + "')")
    @Operation(summary = "Transfer one order to a destination warehouse", description = "Required authority: " + OverseasPermissions.LAST_MILE_ORDER_EDIT)
    public ApiResponse<Integer> transferOne(
        @AuthenticationPrincipal AuthenticatedUser user,
        @RequestParam(required = false) String customerId,
        @PathVariable long id,
        @Valid @RequestBody LastlegOrderRequests.SingleTransferDestination request) {
        return ApiResponse.success(orderService.transferDestination(platformScope(user, customerId), request.withOrderId(id)));
    }

    @PutMapping("/api/platform/v1/last-leg/orders/destination")
    @PreAuthorize("hasAuthority('" + OverseasPermissions.LAST_MILE_ORDER_EDIT + "')")
    @Operation(summary = "Transfer multiple orders to a destination warehouse", description = "Required authority: " + OverseasPermissions.LAST_MILE_ORDER_EDIT)
    public ApiResponse<Integer> transferBatch(
        @AuthenticationPrincipal AuthenticatedUser user,
        @RequestParam(required = false) String customerId,
        @Valid @RequestBody LastlegOrderRequests.TransferDestination request) {
        return ApiResponse.success(orderService.transferDestination(platformScope(user, customerId), request));
    }

    private String platformScope(AuthenticatedUser user, String requestedCustomer) {
        if (user == null || user.tenantId() == null) {
            throw new ResponseStatusException(HttpStatus.UNAUTHORIZED);
        }
        if (!"PLATFORM".equals(user.appCode()) || user.tenantId() != 0L) {
            throw new ResponseStatusException(HttpStatus.FORBIDDEN, "Platform identity is required");
        }
        return requestedCustomer == null || requestedCustomer.isBlank() || "0".equals(requestedCustomer)
            ? null : requestedCustomer.trim();
    }
}