import { create } from "zustand"
import { generateId } from "@/lib/id"
import { allow, deny } from "@/lib/policy/assert"
import type { PolicyDecision } from "@/lib/policy/decision"
import { mockReviews, mockUsers } from "@/lib/mock"
import type { Review } from "@/lib/types"
import { useOrderStore } from "@/store/orders"

interface SubmitReviewInput {
  orderId: string
  fromUserId: string
  rating: number
  content?: string
}

interface ReviewState {
  reviews: Review[]
  submitReview: (input: SubmitReviewInput) => PolicyDecision
  getReviewsByOrder: (orderId: string) => Review[]
  hasUserReviewed: (orderId: string, userId: string) => boolean
}

function resolveUser(userId: string) {
  return mockUsers.find((user) => user.id === userId)
}

function resolveOrderUser(orderId: string, userId: string) {
  const order = useOrderStore.getState().orders.find((item) => item.id === orderId)
  if (!order) return null

  if (order.consumerId === userId) {
    return {
      fromUserName: order.consumerName,
      toUserId: order.playerId,
      toUserName: order.playerName,
    }
  }

  if (order.playerId === userId) {
    return {
      fromUserName: order.playerName,
      toUserId: order.consumerId,
      toUserName: order.consumerName,
    }
  }

  return null
}

export const useReviewStore = create<ReviewState>((set, get) => ({
  reviews: mockReviews,
  getReviewsByOrder: (orderId) => get().reviews.filter((review) => review.orderId === orderId),
  hasUserReviewed: (orderId, userId) =>
    get().reviews.some((review) => review.orderId === orderId && review.fromUserId === userId),
  submitReview: (input) => {
    if (!input.fromUserId) {
      return deny("AUTH_REQUIRED", "请先登录")
    }

    if (!Number.isFinite(input.rating) || input.rating < 1 || input.rating > 5) {
      return deny("VALIDATION_FAILED", "评分范围应为 1-5")
    }

    const order = useOrderStore.getState().orders.find((item) => item.id === input.orderId)
    if (!order) {
      return deny("NOT_FOUND", "订单不存在")
    }

    if (order.status !== "pending_review") {
      return deny("INVALID_STATUS", "仅待评价订单可提交评价")
    }

    const relation = resolveOrderUser(input.orderId, input.fromUserId)
    if (!relation) {
      return deny("NOT_PARTICIPANT", "仅订单参与方可评价")
    }

    const exists = get().hasUserReviewed(input.orderId, input.fromUserId)
    if (exists) {
      return deny("ALREADY_DONE", "该订单已提交过评价")
    }

    const fromUser = resolveUser(input.fromUserId)
    const createdAt = new Date().toISOString()

    const review: Review = {
      id: generateId("rev"),
      orderId: input.orderId,
      fromUserId: input.fromUserId,
      fromUserName: relation.fromUserName,
      fromUserAvatar: fromUser?.avatar ?? "",
      toUserId: relation.toUserId,
      rating: input.rating,
      content: input.content?.trim() || undefined,
      sealed: true,
      createdAt,
    }

    set((state) => ({ reviews: [...state.reviews, review] }))

    const orderReviews = get().getReviewsByOrder(input.orderId)
    if (orderReviews.length >= 2) {
      set((state) => ({
        reviews: state.reviews.map((item) =>
          item.orderId === input.orderId ? { ...item, sealed: false } : item,
        ),
      }))
    }

    return allow()
  },
}))