import type { Product } from '@/models/products'
import { getTradeBuyPrice, getTradeSellPrice, lastPrice } from '@/utils/price'
import { resolveProductCashFeeBuyRial, resolveProductCashFeeSellRial } from '@/utils/productCashFee'
import {
  isAppPriceProduct,
  isColleaguePriceProduct,
  isMeltedProductUsingAppPrice,
  isMeltedTradeGroup,
  isMetalCommodityGroup,
  usesQuantityTrade,
} from '@/utils/productCategories'
import { isProductTradingHoursOpen } from '@/utils/productTradeOpen'
import { lastPriceIncludesSpecial } from '@/utils/specialPricing'

/**
 * قیمت‌گیری محصول — هم‌تراز با khaneghi_user:
 * آبشده / قیمت‌اپ از مظنه زنده؛ قیمت ثابت و مرجع از سرور.
 */

function productUsesLastPriceIfZero(product: Product): boolean {
  return Boolean(product.use_last_price_if_zero)
}

function hasReferenceReadingMethod(product: Product): boolean {
  return Boolean(product.reading_method)
}

/** پایه از buy/sell مظنه آمده — special همان‌جا اعمال شده و نباید دوباره جمع شود */
function productUsesLiveBoardQuote(product: Product, side: 'buy' | 'sell'): boolean {
  if (isColleaguePriceProduct(product)) {
    const stored = side === 'sell'
      ? Number(product.sellPrice ?? product.price ?? 0)
      : Number(product.price ?? 0)
    if (stored > 0) {
      return false
    }
    const live = side === 'buy' ? getTradeBuyPrice(lastPrice.value) : getTradeSellPrice(lastPrice.value)
    return isMeltedTradeGroup(product.group_type) && live > 0
  }

  if (isMeltedProductUsingAppPrice(product) || isAppPriceProduct(product)) {
    const live = side === 'buy' ? getTradeBuyPrice(lastPrice.value) : getTradeSellPrice(lastPrice.value)
    return live > 0
  }

  return false
}

function cashFeeOptions(product: Product, side: 'buy' | 'sell') {
  if (lastPriceIncludesSpecial(lastPrice.value) && productUsesLiveBoardQuote(product, side)) {
    return { includeSpecial: false as const }
  }
  return undefined
}

function buyCashFee(product: Product, base: number) {
  return resolveProductCashFeeBuyRial(product, base, cashFeeOptions(product, 'buy'))
}

function sellCashFee(product: Product, base: number) {
  return resolveProductCashFeeSellRial(product, base, cashFeeOptions(product, 'sell'))
}

/** سمت خرید/فروش همکار؛ اگر سرور نفرستاده باشد همان قیمت وسط قبلی */
function colleagueSideUnit(product: Product, side: 'buy' | 'sell', live: number): number {
  const sided = side === 'buy' ? Number(product.price_buy ?? 0) : Number(product.price_sell ?? 0)
  if (sided > 0) {
    return sided
  }
  return getColleagueSourcedUnitPrice(product, live)
}

/** قیمت منبع همکار؛ اگر خالی بود آبشده همان مظنهٔ صفحه اصلی را می‌گیرد */
function getColleagueSourcedUnitPrice(product: Product, live: number, apiPrice = Number(product.price ?? 0)): number {
  if (apiPrice > 0) {
    return apiPrice
  }
  if (isMeltedTradeGroup(product.group_type) && live > 0) {
    return applyPriceOffsetPercent(live, product.price_offset_percent)
  }
  return 0
}

function hasProductUnitWeight(product?: Product | null) {
  if (!product || isMeltedTradeGroup(product.group_type)) {
    return false
  }
  return Number(product.amount ?? 0) > 0
}

function productPriceAmountFactor(product?: Product | null) {
  if (!product || product.reading_method || isColleaguePriceProduct(product)) {
    return 1
  }
  if (isAppPriceProduct(product)) {
    const amount = Number(product.amount ?? 0)
    return amount > 0 ? amount : 1
  }
  if (hasProductUnitWeight(product) && Number(product.direct_price ?? 0) === 0) {
    const amount = Number(product.amount ?? 0)
    return amount > 0 ? amount : 1
  }
  return 1
}

function getReferenceProductBaseBuyPrice(product: Product): number {
  const storedUnit = Number(product.price ?? 0)
  const useLast = productUsesLastPriceIfZero(product)

  if (!useLast) {
    return storedUnit > 0 ? storedUnit : 0
  }

  return storedUnit
}

export function resolvePriceOffsetRatio(offsetPercent?: number | null) {
  const offset = Number(offsetPercent ?? 0)
  if (!offset) {
    return 0
  }

  if (Math.abs(offset) > 0 && Math.abs(offset) < 1) {
    return offset
  }

  return offset / 100
}

export function applyPriceOffsetPercent(basePrice: number, offsetPercent?: number | null) {
  const ratio = resolvePriceOffsetRatio(offsetPercent)
  if (!ratio) {
    return basePrice
  }

  return Math.round(basePrice * (1 + ratio))
}

/** قیمت پایه بدون کارمزد */
export function getProductBaseBuyPrice(product?: Product | null): number {
  if (!product) {
    return 0
  }

  if (isColleaguePriceProduct(product)) {
    return colleagueSideUnit(product, 'buy', getTradeBuyPrice(lastPrice.value))
  }

  if (isMeltedProductUsingAppPrice(product) || isAppPriceProduct(product)) {
    const liveBuy = getTradeBuyPrice(lastPrice.value)
    if (liveBuy > 0) {
      return applyPriceOffsetPercent(liveBuy, product.price_offset_percent)
    }
    if (productUsesLastPriceIfZero(product) && Number(product.price ?? 0) > 0) {
      return Number(product.price ?? 0)
    }
    return 0
  }

  if (isMeltedTradeGroup(product.group_type)) {
    return Number(product.price ?? 0)
  }

  if (isMetalCommodityGroup(product.group_type)) {
    return Number(product.price_profit ?? 0) + Number(product.price ?? 0)
  }

  if (hasReferenceReadingMethod(product)) {
    return getReferenceProductBaseBuyPrice(product)
  }

  return Number(product.price ?? 0)
}

/** قیمت خرید نمایشی */
export function getProductBuyPrice(product?: Product | null): number {
  if (!product) {
    return 0
  }

  const base = getProductBaseBuyPrice(product)
  if (base <= 0) {
    return 0
  }

  const fee = buyCashFee(product, base)
  const withFee = base + fee

  if (isColleaguePriceProduct(product)) {
    return withFee
  }

  if (isAppPriceProduct(product)) {
    return withFee * productPriceAmountFactor(product)
  }

  if (
    isMeltedProductUsingAppPrice(product)
    || isMeltedTradeGroup(product.group_type)
    || isMetalCommodityGroup(product.group_type)
  ) {
    return withFee
  }

  if (usesQuantityTrade(product) && hasProductUnitWeight(product)) {
    return withFee * productPriceAmountFactor(product)
  }

  if (usesQuantityTrade(product)) {
    return withFee
  }

  return withFee * productPriceAmountFactor(product)
}

/** قیمت پایه فروش */
export function getProductBaseSellPrice(product?: Product | null): number {
  if (!product) {
    return 0
  }

  if (isColleaguePriceProduct(product)) {
    return colleagueSideUnit(product, 'sell', getTradeSellPrice(lastPrice.value))
  }

  if (isMeltedProductUsingAppPrice(product) || isAppPriceProduct(product)) {
    const liveSell = getTradeSellPrice(lastPrice.value)
    if (liveSell > 0) {
      return applyPriceOffsetPercent(liveSell, product.price_offset_percent)
    }
    if (productUsesLastPriceIfZero(product) && Number(product.price ?? 0) > 0) {
      return Number(product.price ?? 0)
    }
    return 0
  }

  if (isMeltedTradeGroup(product.group_type)) {
    return Number(product.sellPrice ?? product.price ?? 0)
  }

  const serverSell = Number(product.sellPrice ?? 0)
  if (serverSell > 0) {
    return serverSell
  }

  return getProductBaseBuyPrice(product)
}

/** قیمت فروش نمایشی */
export function getProductSellPrice(product?: Product | null): number {
  if (!product) {
    return 0
  }

  const base = getProductBaseSellPrice(product)
  if (base <= 0) {
    return 0
  }

  if (isColleaguePriceProduct(product)) {
    return base - sellCashFee(product, base)
  }

  if (isAppPriceProduct(product)) {
    const withFee = base - sellCashFee(product, base)
    return withFee * productPriceAmountFactor(product)
  }

  if (isMeltedProductUsingAppPrice(product) || isMeltedTradeGroup(product.group_type)) {
    return base - sellCashFee(product, base)
  }

  if (usesQuantityTrade(product) && hasProductUnitWeight(product)) {
    const withFee = base - sellCashFee(product, base)
    return withFee * productPriceAmountFactor(product)
  }

  if (usesQuantityTrade(product)) {
    return base - sellCashFee(product, base)
  }

  return base - sellCashFee(product, base)
}

/** کارت فروشگاه: قیمت نمایشی صفر → «بدون قیمت» */
export function isProductWithoutDisplayPrice(product?: Product | null): boolean {
  return getProductBuyPrice(product) <= 0
}

export function isProductPriceInactive(product?: Product | null): boolean {
  if (!product) {
    return true
  }

  if (!isProductTradingHoursOpen(product)) {
    return true
  }

  if (
    hasReferenceReadingMethod(product)
    && !productUsesLastPriceIfZero(product)
    && product.reference_provider_active === false
  ) {
    return true
  }

  return getProductBaseBuyPrice(product) <= 0
}

function tvBuyUnitPrice(product: Product): number {
  return Number(product.tv_price ?? 0)
}

function tvSellUnitPrice(product: Product): number {
  const sell = Number(product.tv_sell_price ?? 0)
  if (sell > 0) {
    return sell
  }
  return tvBuyUnitPrice(product)
}

export function getTvProductBuyPrice(product?: Product | null): number {
  if (!product) {
    return 0
  }
  const unit = tvBuyUnitPrice(product)
  if (unit > 0) {
    return unit
  }
  return getProductBuyPrice(product)
}

export function getTvProductSellPrice(product?: Product | null): number {
  if (!product) {
    return 0
  }
  const unit = tvSellUnitPrice(product)
  if (unit > 0) {
    return unit
  }
  return getProductSellPrice(product)
}

export function isTvProductPriceInactive(product?: Product | null): boolean {
  if (!product) {
    return true
  }
  if (tvBuyUnitPrice(product) > 0 || tvSellUnitPrice(product) > 0) {
    return false
  }
  return isProductPriceInactive(product)
}

/**
 * نمایش محصول در فروشگاه — اولویت با `show` سرور.
 * آبشدهٔ قیمت‌اپ با مظنه زنده حتی اگر show هنوز false باشد.
 */
export function isProductVisible(product?: Product | null): boolean {
  if (!product || product.active === false) {
    return false
  }

  if (product.show) {
    return true
  }

  return isMeltedProductUsingAppPrice(product) && getProductBaseBuyPrice(product) > 0
}

export { isMeltedTradeGroup, isMeltedProductUsingAppPrice } from '@/utils/productCategories'