import fp from 'fastify-plugin';
import { asClass, Lifetime } from 'awilix';
import type { ZodTypeProvider } from 'fastify-type-provider-zod';
import { z } from 'zod/v4';
import {
  CreateRefillListSchema,
  UpdateRefillListSchema,
  UpdateRefillListItemSchema,
  RefillListQuerySchema,
  RefillAlertQuerySchema,
  RefillAlertResponseSchema,
  RefillListResponseSchema,
  RefillListListResponseSchema,
  AddToCabinetResponseSchema,
  StoreComparisonItemSchema,
  type CreateRefillListInput,
  type UpdateRefillListInput,
  type UpdateRefillListItemInput,
  type RefillListQueryInput,
} from '@meshitrack/shared';
import { RefillsRepository } from './refills.repository.js';
import { RefillsService } from './refills.service.js';
import type { RefillListDocument } from '../../schemas/refill-list.schema.js';

interface SerializedRefillListItemResponse {
  _id: string;
  medicineId: string;
  medicineName: string;
  quantity: number;
  unit: string;
  estimatedPrice?: number;
  actualPrice?: number;
  checked: boolean;
  checkedAt?: string;
  addedToCabinet: boolean;
  storeId?: string;
  notes?: string;
}

interface SerializedRefillListResponse {
  _id: string;
  householdId: string;
  name: string;
  items: SerializedRefillListItemResponse[];
  status: 'active' | 'completed' | 'cancelled';
  preferredStoreId?: string;
  totalEstimatedCost?: number;
  createdBy: string;
  createdAt: string;
  updatedAt: string;
}

function toListResponse(doc: RefillListDocument): SerializedRefillListResponse {
  const docAny = doc as unknown as {
    preferredStoreId?: string | null;
    totalEstimatedCost?: number | null;
    createdAt?: { toISOString?: () => string } | string;
    updatedAt?: { toISOString?: () => string } | string;
  };

  const getIsoStr = (d: { toISOString?: () => string } | string | undefined | null): string => {
    if (!d) return '';
    if (typeof d === 'string') return d;
    if (typeof d.toISOString === 'function') return d.toISOString();
    return String(d);
  };

  const response: SerializedRefillListResponse = {
    _id: doc._id.toString(),
    householdId: doc.householdId,
    name: doc.name,
    items: doc.items.map((item) => {
      const itemAny = item as unknown as {
        _id: { toString: () => string };
        estimatedPrice?: number | null;
        actualPrice?: number | null;
        checkedAt?: { toISOString?: () => string } | string | Date;
        storeId?: string | null;
        notes?: string | null;
      };

      const itemResponse: SerializedRefillListItemResponse = {
        _id: itemAny._id.toString(),
        medicineId: item.medicineId,
        medicineName: item.medicineName,
        quantity: item.quantity,
        unit: item.unit,
        checked: item.checked,
        addedToCabinet: item.addedToCabinet,
      };

      if (itemAny.estimatedPrice != null) itemResponse.estimatedPrice = itemAny.estimatedPrice;
      if (itemAny.actualPrice != null) itemResponse.actualPrice = itemAny.actualPrice;
      if (itemAny.checkedAt) {
        if (typeof itemAny.checkedAt === 'string') {
          itemResponse.checkedAt = itemAny.checkedAt;
        } else if (itemAny.checkedAt instanceof Date) {
          itemResponse.checkedAt = itemAny.checkedAt.toISOString();
        } else if (typeof itemAny.checkedAt.toISOString === 'function') {
          itemResponse.checkedAt = itemAny.checkedAt.toISOString();
        }
      }
      if (itemAny.storeId) itemResponse.storeId = itemAny.storeId;
      if (itemAny.notes) itemResponse.notes = itemAny.notes;

      return itemResponse;
    }),
    status: doc.status as 'active' | 'completed' | 'cancelled',
    createdBy: doc.createdBy,
    createdAt: getIsoStr(docAny.createdAt),
    updatedAt: getIsoStr(docAny.updatedAt),
  };

  if (docAny.preferredStoreId) response.preferredStoreId = docAny.preferredStoreId;
  if (docAny.totalEstimatedCost != null) response.totalEstimatedCost = docAny.totalEstimatedCost;

  return response;
}

declare module '@fastify/awilix' {
  interface Cradle {
    refillsRepository: RefillsRepository;
    refillsService: RefillsService;
  }
}

export default fp(
  async (fastify) => {
    fastify.diContainer.register({
      refillsRepository: asClass(RefillsRepository, { lifetime: Lifetime.SINGLETON }),
      refillsService: asClass(RefillsService, { lifetime: Lifetime.SINGLETON }),
    });

    const app = fastify.withTypeProvider<ZodTypeProvider>();
    const householdParams = z.object({ householdId: z.string() });

    app.route({
      method: 'GET',
      url: '/api/v1/households/:householdId/refills/alerts',
      schema: {
        params: householdParams,
        querystring: RefillAlertQuerySchema,
        response: { 200: z.object({ data: z.array(RefillAlertResponseSchema) }) },
      },
      handler: async (request, reply) => {
        const service = fastify.diContainer.resolve('refillsService');
        const params = request.params as { householdId: string };
        const query = request.query as { userId?: string; thresholdDays?: number };
        const alerts = await service.getAlerts(
          params.householdId,
          query.userId ?? request.user.keycloakId,
          query.thresholdDays,
        );
        return reply.send({
          data: alerts.map((a) => ({
            ...a,
            lastKnownPrice: a.lastKnownPrice
              ? { ...a.lastKnownPrice, date: a.lastKnownPrice.date.toISOString() }
              : undefined,
            cheapestOption: a.cheapestOption
              ? { ...a.cheapestOption, date: a.cheapestOption.date.toISOString() }
              : undefined,
          })),
        });
      },
    });

    app.route({
      method: 'POST',
      url: '/api/v1/households/:householdId/refills/lists',
      schema: {
        params: householdParams,
        body: CreateRefillListSchema,
        response: { 201: RefillListResponseSchema },
      },
      handler: async (request, reply) => {
        const service = fastify.diContainer.resolve('refillsService');
        const params = request.params as { householdId: string };
        const body = request.body as CreateRefillListInput;
        const list = await service.createList(body, params.householdId, request.user.keycloakId);
        return reply.status(201).send(toListResponse(list));
      },
    });

    app.route({
      method: 'GET',
      url: '/api/v1/households/:householdId/refills/lists',
      schema: {
        params: householdParams,
        querystring: RefillListQuerySchema,
        response: { 200: RefillListListResponseSchema },
      },
      handler: async (request, reply) => {
        const service = fastify.diContainer.resolve('refillsService');
        const params = request.params as { householdId: string };
        const query = request.query as RefillListQueryInput;
        const result = await service.list(params.householdId, query);
        return reply.send({
          data: result.data.map(toListResponse),
          pagination: result.pagination,
        });
      },
    });

    app.route({
      method: 'GET',
      url: '/api/v1/households/:householdId/refills/lists/:id',
      schema: {
        params: householdParams.extend({ id: z.string() }),
        response: { 200: RefillListResponseSchema },
      },
      handler: async (request, reply) => {
        const service = fastify.diContainer.resolve('refillsService');
        const params = request.params as { householdId: string; id: string };
        const list = await service.getById(params.id, params.householdId);
        return reply.send(toListResponse(list));
      },
    });

    app.route({
      method: 'PATCH',
      url: '/api/v1/households/:householdId/refills/lists/:id',
      schema: {
        params: householdParams.extend({ id: z.string() }),
        body: UpdateRefillListSchema,
        response: { 200: RefillListResponseSchema },
      },
      handler: async (request, reply) => {
        const service = fastify.diContainer.resolve('refillsService');
        const params = request.params as { householdId: string; id: string };
        const body = request.body as UpdateRefillListInput;
        const list = await service.updateList(params.id, params.householdId, body);
        return reply.send(toListResponse(list));
      },
    });

    app.route({
      method: 'PATCH',
      url: '/api/v1/households/:householdId/refills/lists/:id/items/:itemId',
      schema: {
        params: householdParams.extend({ id: z.string(), itemId: z.string() }),
        body: UpdateRefillListItemSchema,
        response: { 200: RefillListResponseSchema },
      },
      handler: async (request, reply) => {
        const service = fastify.diContainer.resolve('refillsService');
        const params = request.params as { householdId: string; id: string; itemId: string };
        const body = request.body as UpdateRefillListItemInput;
        const list = await service.updateItem(params.id, params.householdId, params.itemId, body);
        return reply.send(toListResponse(list));
      },
    });

    app.route({
      method: 'POST',
      url: '/api/v1/households/:householdId/refills/lists/:id/add-to-cabinet',
      schema: {
        params: householdParams.extend({ id: z.string() }),
        response: { 200: AddToCabinetResponseSchema },
      },
      handler: async (request, reply) => {
        const service = fastify.diContainer.resolve('refillsService');
        const params = request.params as { householdId: string; id: string };
        const result = await service.addToCabinet(
          params.id,
          params.householdId,
          request.user.keycloakId,
        );
        return reply.send(result);
      },
    });

    app.route({
      method: 'GET',
      url: '/api/v1/households/:householdId/refills/lists/:id/store-comparison',
      schema: {
        params: householdParams.extend({ id: z.string() }),
        response: {
          200: z.object({
            data: z.array(
              z.object({
                medicineId: z.string(),
                storeOptions: z.array(StoreComparisonItemSchema),
              }),
            ),
          }),
        },
      },
      handler: async (request, reply) => {
        const service = fastify.diContainer.resolve('refillsService');
        const params = request.params as { householdId: string; id: string };
        const comparisons = await service.getStoreComparison(params.id, params.householdId);
        return reply.send({
          data: comparisons.map((c) => ({
            medicineId: c.medicineId,
            storeOptions: c.storeOptions.map((opt) => ({
              ...opt,
              date: opt.date.toISOString(),
            })),
          })),
        });
      },
    });
  },
  {
    name: 'refills-routes',
    dependencies: ['auth-plugin'],
  },
);