import { defineStore } from "pinia";
import type { PreviewData, SubmitResult, UploadFileAsset, UploadItem } from "../api/appraisal";

type ProductState = {
  categoryId: number;
  categoryName: string;
  brandId: number;
  brandName: string;
};

type ExtraState = {
  purchaseChannel: string;
  purchasePrice: string;
  purchaseDate: string;
  usageStatus: string;
  conditionDesc: string;
  accessories: string[];
  remark: string;
};

type ReturnAddressState = {
  id: number;
  consignee: string;
  mobile: string;
  province: string;
  city: string;
  district: string;
  detailAddress: string;
  fullAddress: string;
  isDefault: boolean;
};

const storageKey = "anxinyan_appraisal_flow";
const legacyDemoExtra: ExtraState = {
  purchaseChannel: "专柜",
  purchasePrice: "8500",
  purchaseDate: "",
  usageStatus: "light_use",
  conditionDesc: "轻微使用痕迹",
  accessories: ["防尘袋", "包装盒"],
  remark: "",
};

function initialProduct(): ProductState {
  return {
    categoryId: 0,
    categoryName: "",
    brandId: 0,
    brandName: "",
  };
}

function initialExtra(): ExtraState {
  return {
    purchaseChannel: "",
    purchasePrice: "",
    purchaseDate: "",
    usageStatus: "",
    conditionDesc: "",
    accessories: [],
    remark: "",
  };
}

function isLegacyDemoExtra(extra: Partial<ExtraState> | undefined) {
  if (!extra) return false;
  const accessories = Array.isArray(extra.accessories) ? extra.accessories : [];
  return (
    extra.purchaseChannel === legacyDemoExtra.purchaseChannel &&
    extra.purchasePrice === legacyDemoExtra.purchasePrice &&
    (extra.purchaseDate || "") === legacyDemoExtra.purchaseDate &&
    extra.usageStatus === legacyDemoExtra.usageStatus &&
    extra.conditionDesc === legacyDemoExtra.conditionDesc &&
    (extra.remark || "") === legacyDemoExtra.remark &&
    accessories.length === legacyDemoExtra.accessories.length &&
    accessories.every((item, index) => item === legacyDemoExtra.accessories[index])
  );
}

function initialReturnAddress(): ReturnAddressState {
  return {
    id: 0,
    consignee: "",
    mobile: "",
    province: "",
    city: "",
    district: "",
    detailAddress: "",
    fullAddress: "",
    isDefault: false,
  };
}

export const useAppraisalStore = defineStore("appraisal", {
  state: () => ({
    draftId: 0,
    serviceProvider: "anxinyan",
    serviceMode: "physical",
    pricePackageId: 0,
    pricePackageName: "",
    pricePackageCode: "",
    pricePackagePrice: 0,
    currentStep: 1,
    product: initialProduct(),
    extra: initialExtra(),
    returnAddress: initialReturnAddress(),
    uploadTemplateId: 0,
    requiredItems: [] as UploadItem[],
    optionalItems: [] as UploadItem[],
    preview: null as PreviewData | null,
    submitResult: null as SubmitResult | null,
  }),
  actions: {
    hydrate() {
      const raw = uni.getStorageSync(storageKey);
      if (!raw) return;
      try {
        const parsed = JSON.parse(raw);
        Object.assign(this, parsed);
        if (isLegacyDemoExtra(this.extra)) {
          this.extra = initialExtra();
          this.persist();
        }
      } catch (error) {
        console.warn("hydrate appraisal store failed", error);
      }
    },
    persist() {
      uni.setStorageSync(
        storageKey,
        JSON.stringify({
          draftId: this.draftId,
          serviceProvider: this.serviceProvider,
          serviceMode: this.serviceMode,
          pricePackageId: this.pricePackageId,
          pricePackageName: this.pricePackageName,
          pricePackageCode: this.pricePackageCode,
          pricePackagePrice: this.pricePackagePrice,
          currentStep: this.currentStep,
          product: this.product,
          extra: this.extra,
          returnAddress: this.returnAddress,
          uploadTemplateId: this.uploadTemplateId,
          requiredItems: this.requiredItems,
          optionalItems: this.optionalItems,
          preview: this.preview,
          submitResult: this.submitResult,
        }),
      );
    },
    setServiceProvider(serviceProvider: string) {
      this.serviceProvider = serviceProvider;
      this.persist();
    },
    setPricePackage(payload: {
      id: number;
      packageName: string;
      packageCode: string;
      price: number;
    }) {
      this.pricePackageId = payload.id;
      this.pricePackageName = payload.packageName;
      this.pricePackageCode = payload.packageCode;
      this.pricePackagePrice = payload.price;
      this.persist();
    },
    setDraft(id: number) {
      this.draftId = id;
      this.persist();
    },
    setCurrentStep(step: number) {
      this.currentStep = step;
      this.persist();
    },
    setProduct(payload: Partial<ProductState>) {
      this.product = {
        ...this.product,
        ...payload,
      };
      this.persist();
    },
    setExtra(payload: Partial<ExtraState>) {
      this.extra = {
        ...this.extra,
        ...payload,
      };
      this.persist();
    },
    resetExtra() {
      this.extra = initialExtra();
      this.persist();
    },
    clearLegacyExtraDefaults() {
      if (!isLegacyDemoExtra(this.extra)) {
        return false;
      }
      this.extra = initialExtra();
      this.persist();
      return true;
    },
    setReturnAddress(payload: Partial<ReturnAddressState>) {
      this.returnAddress = {
        ...this.returnAddress,
        ...payload,
      };
      this.persist();
    },
    clearReturnAddress() {
      this.returnAddress = initialReturnAddress();
      this.persist();
    },
    setUploadTemplate(templateId: number, requiredItems: UploadItem[], optionalItems: UploadItem[]) {
      const requiredMap = new Map(this.requiredItems.map((item) => [item.item_code, item.files || []]));
      const optionalMap = new Map(this.optionalItems.map((item) => [item.item_code, item.files || []]));
      this.uploadTemplateId = templateId;
      this.requiredItems = requiredItems.map((item) => ({
        ...item,
        files: item.files || requiredMap.get(item.item_code) || [],
      }));
      this.optionalItems = optionalItems.map((item) => ({
        ...item,
        files: item.files || optionalMap.get(item.item_code) || [],
      }));
      this.persist();
    },
    hydrateUploadItems(items: UploadItem[]) {
      const required = items.filter((item) => item.is_required);
      const optional = items.filter((item) => !item.is_required);
      this.requiredItems = required.map((item) => ({
        ...item,
        files: item.files || [],
      }));
      this.optionalItems = optional.map((item) => ({
        ...item,
        files: item.files || [],
      }));
      this.persist();
    },
    upsertUploadFile(itemCode: string, file: UploadFileAsset, isRequired: boolean) {
      const target = isRequired ? this.requiredItems : this.optionalItems;
      const index = target.findIndex((item) => item.item_code === itemCode);
      if (index >= 0) {
        const currentFiles = target[index].files || [];
        const nextFiles = [...currentFiles, file];
        target[index] = {
          ...target[index],
          files: nextFiles,
          quality_status: nextFiles.length ? "uploaded" : "pending",
          quality_message: "",
        };
        this.persist();
      }
    },
    removeUploadFile(itemCode: string, fileId: string, isRequired: boolean) {
      const target = isRequired ? this.requiredItems : this.optionalItems;
      const index = target.findIndex((item) => item.item_code === itemCode);
      if (index >= 0) {
        const nextFiles = (target[index].files || []).filter((item) => item.file_id !== fileId);
        target[index] = {
          ...target[index],
          files: nextFiles,
          quality_status: nextFiles.length ? "uploaded" : (target[index].is_required ? "pending" : "optional"),
        };
        this.persist();
      }
    },
    setPreview(preview: PreviewData | null) {
      this.preview = preview;
      this.persist();
    },
    setSubmitResult(result: SubmitResult | null) {
      this.submitResult = result;
      this.persist();
    },
    resetForNewFlow() {
      this.serviceProvider = "anxinyan";
      this.serviceMode = "physical";
      this.pricePackageId = 0;
      this.pricePackageName = "";
      this.pricePackageCode = "";
      this.pricePackagePrice = 0;
      this.draftId = 0;
      this.currentStep = 1;
      this.product = initialProduct();
      this.extra = initialExtra();
      this.returnAddress = initialReturnAddress();
      this.uploadTemplateId = 0;
      this.requiredItems = [];
      this.optionalItems = [];
      this.preview = null;
      this.submitResult = null;
      this.persist();
    },
  },
});