NightSpire/web-next/lib/store.ts

import type { RowDataPacket } from 'mysql2'
import { db, DB } from './db'
import { executeSoapCommand } from './soap'
import { PD_PER_UNIT } from './dpoints'
import { VP_PRICE_FACTOR } from './pay-with-dpoints'

/**
 * Tienda de ítems (transfiguración/equipo), portada del sistema antiguo (BENNU).
 * Catálogo en `home_store_category` (árbol por `code` "1-1-1") + `home_store_item`
 * (precio en PD o PV, cantidad, icono). Se paga con el saldo PD/PV de la cuenta y
 * los ítems se envían por correo al personaje elegido (SOAP `.send items`).
 */

export type Currency = 'pd' | 'pv'
const SAFE_NAME = /^[A-Za-z]{1,12}$/
const MAIL_ITEM_LIMIT = 12 // máximo de ítems por correo en AzerothCore

export interface StoreItem {
  id: number // fila de home_store_item (clave del carrito)
  itemId: number
  name: string
  icon: string | null
  qty: number
  currency: Currency
  price: number
  preview: string | null
}

export interface StoreCategory {
  code: string
  name: string
  depth: number
  children: StoreCategory[]
  items: StoreItem[]
}

interface CatRow extends RowDataPacket {
  code: string
  parent_code: string | null
  name: string
  depth: number
  sort: number
}
interface ItemRow extends RowDataPacket {
  id: number
  category_code: string
  item_id: number
  name: string
  icon: string | null
  quantity: number
  currency: Currency
  price: number
  preview: string | null
  sort: number
}

/** Árbol completo de la tienda (categorías anidadas con sus ítems en las hojas). */
export async function getStoreCatalog(): Promise<StoreCategory[]> {
  let cats: CatRow[] = []
  let items: ItemRow[] = []
  try {
    ;[cats] = await db(DB.default).query<CatRow[]>(
      'SELECT code, parent_code, name, depth, sort FROM home_store_category ORDER BY sort',
    )
    ;[items] = await db(DB.default).query<ItemRow[]>(
      'SELECT id, category_code, item_id, name, icon, quantity, currency, price, preview, sort FROM home_store_item ORDER BY sort',
    )
  } catch {
    return []
  }

  const nodes = new Map<string, StoreCategory>()
  for (const c of cats) {
    nodes.set(c.code, { code: c.code, name: c.name, depth: c.depth, children: [], items: [] })
  }
  const roots: StoreCategory[] = []
  for (const c of cats) {
    const node = nodes.get(c.code)!
    if (c.parent_code && nodes.has(c.parent_code)) nodes.get(c.parent_code)!.children.push(node)
    else roots.push(node)
  }
  for (const it of items) {
    const leaf = nodes.get(it.category_code)
    if (!leaf) continue
    leaf.items.push({
      id: it.id,
      itemId: it.item_id,
      name: it.name,
      icon: it.icon,
      qty: it.quantity,
      currency: it.currency,
      price: it.price,
      preview: it.preview,
    })
  }
  return roots
}

/** Saldos PD y PV de la cuenta (para mostrar y validar). */
export async function getStoreBalances(accountId: number): Promise<{ dp: number; vp: number }> {
  if (!accountId) return { dp: 0, vp: 0 }
  try {
    const [rows] = await db(DB.default).query<RowDataPacket[]>(
      'SELECT dp, vp FROM home_api_points WHERE accountID = ?',
      [accountId],
    )
    return rows[0] ? { dp: Number(rows[0].dp), vp: Number(rows[0].vp) } : { dp: 0, vp: 0 }
  } catch {
    return { dp: 0, vp: 0 }
  }
}

export interface PricedCart {
  lines: { id: number; itemId: number; qty: number; currency: Currency; price: number }[]
  pdTotal: number
  vpTotal: number
}

/**
 * Valida el carrito contra la BD (precios/cantidades/moneda REALES, nunca del
 * cliente) a partir de las filas `home_store_item.id`. Devuelve null si vacío.
 */
export async function priceStoreCart(itemRowIds: number[]): Promise<PricedCart | null> {
  const ids = [...new Set((Array.isArray(itemRowIds) ? itemRowIds : []).map((n) => Math.floor(Number(n))).filter((n) => n > 0))]
  if (ids.length === 0) return null
  let rows: ItemRow[] = []
  try {
    ;[rows] = await db(DB.default).query<ItemRow[]>(
      `SELECT id, item_id, quantity, currency, price FROM home_store_item WHERE id IN (${ids.map(() => '?').join(',')})`,
      ids,
    )
  } catch {
    return null
  }
  if (rows.length === 0) return null
  const lines = rows.map((r) => ({ id: Number(r.id), itemId: Number(r.item_id), qty: Number(r.quantity), currency: r.currency, price: Number(r.price) }))
  const pdTotal = lines.filter((l) => l.currency === 'pd').reduce((s, l) => s + l.price, 0)
  const vpTotal = lines.filter((l) => l.currency === 'pv').reduce((s, l) => s + l.price, 0)
  return { lines, pdTotal, vpTotal }
}

/**
 * Cobra el carrito (descuenta PD y PV de forma atómica, ambos a la vez) y envía
 * los ítems por correo al personaje. Reembolsa si el envío por SOAP falla.
 * Devuelve un código de error si algo no cuadra.
 */
export async function purchaseStoreCart(
  accountId: number,
  character: string,
  cart: PricedCart,
): Promise<{ success: boolean; error?: string }> {
  if (!SAFE_NAME.test(character)) return { success: false, error: 'invalidCharacter' }
  if (cart.pdTotal <= 0 && cart.vpTotal <= 0) return { success: false, error: 'emptyCart' }

  // Cobro atómico: bloquea la fila y exige saldo suficiente en AMBAS monedas.
  const conn = await db(DB.default).getConnection()
  let charged = false
  try {
    await conn.beginTransaction()
    const [pts] = await conn.query<RowDataPacket[]>(
      'SELECT dp, vp FROM home_api_points WHERE accountID = ? FOR UPDATE',
      [accountId],
    )
    const dp = pts[0] ? Number(pts[0].dp) : 0
    const vp = pts[0] ? Number(pts[0].vp) : 0
    if (dp < cart.pdTotal) { await conn.rollback(); return { success: false, error: 'insufficientPd' } }
    if (vp < cart.vpTotal) { await conn.rollback(); return { success: false, error: 'insufficientVp' } }
    await conn.query('UPDATE home_api_points SET dp = dp - ?, vp = vp - ? WHERE accountID = ?', [cart.pdTotal, cart.vpTotal, accountId])
    await conn.commit()
    charged = true
  } catch {
    try { await conn.rollback() } catch { /* ignore */ }
    return { success: false, error: 'genericError' }
  } finally {
    conn.release()
  }

  // Envío por correo (troceado a 12 ítems). Si falla, se reembolsa el saldo.
  const ok = await sendStoreItems(character, cart.lines.map((l) => ({ i: l.itemId, q: l.qty })))
  if (!ok) {
    if (charged) {
      await db(DB.default)
        .query('UPDATE home_api_points SET dp = dp + ?, vp = vp + ? WHERE accountID = ?', [cart.pdTotal, cart.vpTotal, accountId])
        .catch(() => {})
    }
    return { success: false, error: 'deliveryFailed' }
  }
  return { success: true }
}

/**
 * Coste del carrito en euros para pagar con tarjeta. Inverso exacto de cómo se
 * derivan los precios PD/PV de un precio en euros en el resto de servicios:
 * 100 PD = 1 € y los PV cuestan VP_PRICE_FACTOR× (200 PV = 1 €).
 */
export function storeEuroTotal(pdTotal: number, vpTotal: number): number {
  const eur = pdTotal / PD_PER_UNIT + vpTotal / (PD_PER_UNIT * VP_PRICE_FACTOR)
  return Math.round(eur * 100) / 100
}

/** Guarda el carrito como pedido pendiente (para entregarlo tras el pago con tarjeta). */
export async function createStoreOrder(
  ref: string,
  accountId: number,
  character: string,
  cart: PricedCart,
): Promise<boolean> {
  const items = cart.lines.map((l) => `${l.itemId}:${l.qty}`).join(',')
  const amount = storeEuroTotal(cart.pdTotal, cart.vpTotal)
  try {
    await db(DB.default).query(
      'INSERT INTO home_store_order (ref, account_id, character_name, items, amount) VALUES (?, ?, ?, ?, ?)',
      [ref, accountId, character, items, amount],
    )
    return true
  } catch {
    return false
  }
}

/**
 * Entrega un pedido pagado con tarjeta: busca el carrito por `ref` y envía los
 * ítems por correo. Lo llama el fulfillment del servicio `store` (webhook/return).
 */
export async function fulfillStoreOrder(character: string, ref: string): Promise<boolean> {
  if (!ref) return false
  let rows: RowDataPacket[] = []
  try {
    ;[rows] = await db(DB.default).query<RowDataPacket[]>(
      'SELECT character_name, items FROM home_store_order WHERE ref = ?',
      [ref],
    )
  } catch {
    return false
  }
  const order = rows[0]
  if (!order) return false
  const target = character || String(order.character_name)
  const items = String(order.items)
    .split(',')
    .map((p) => {
      const [i, q] = p.split(':')
      return { i: Number(i), q: Number(q) }
    })
    .filter((it) => it.i > 0 && it.q >= 1)
  return sendStoreItems(target, items)
}

/** Envía los ítems de la tienda por correo (SOAP `.send items`), troceado. */
async function sendStoreItems(character: string, items: { i: number; q: number }[]): Promise<boolean> {
  if (!SAFE_NAME.test(character)) return false
  const clean = items
    .map((it) => ({ i: Math.floor(Number(it.i)), q: Math.floor(Number(it.q)) }))
    .filter((it) => it.i > 0 && it.q >= 1)
  if (clean.length === 0) return false
  const subject = 'Tienda'
  const body = 'Has recibido los objetos de la tienda. ¡Que los disfrutes!'
  for (let n = 0; n < clean.length; n += MAIL_ITEM_LIMIT) {
    const chunk = clean.slice(n, n + MAIL_ITEM_LIMIT)
    const itemsStr = chunk.map((it) => `${it.i}:${it.q}`).join(' ')
    const res = await executeSoapCommand(`.send items "${character}" "${subject}" "${body}" ${itemsStr}`)
    if (res === null) return false
  }
  return true
}