import type { RowDataPacket } from 'mysql2'
import { db, DB } from './db'
import { executeSoapCommand } from './soap'
import { getGameCharacters } from './characters'

/**
 * Recuperar ítems (/restore-items): usa el sistema de recuperación de AzerothCore
 * por SOAP. `.item restore list <char>` lista los ítems borrados recuperables (el
 * core aplica las condiciones: calidad Raro+, equipable, se liga al recoger,
 * borrado < 7 días). `.item restore <recoverId> <char>` restaura uno. Cada
 * restauración cuesta **100 PD**. La consulta tiene cooldown de 8 h por personaje.
 */

export const RESTORE_ITEM_PD = 100
const SEARCH_COOLDOWN_MS = 8 * 60 * 60 * 1000
const SAFE_NAME = /^[A-Za-z]{1,12}$/

export interface DeletedItem {
  recoverId: number
  itemId: number
  name: string
  count: number
}

/** Parsea la salida de `.item restore list` (líneas "Recover id: X | Item: NAME (ID) | Count: N"). */
export function parseRecoverList(soap: string): DeletedItem[] {
  const items: DeletedItem[] = []
  const re = /Recover id:\s*(\d+)\s*\|\s*Item:\s*(.+?)\s*\((\d+)\)\s*\|\s*Count:\s*(\d+)/g
  let m: RegExpExecArray | null
  while ((m = re.exec(soap)) !== null) {
    items.push({ recoverId: Number(m[1]), name: m[2].trim(), itemId: Number(m[3]), count: Number(m[4]) })
  }
  return items
}

async function ownsCharacter(accountId: number, character: string): Promise<boolean> {
  if (!SAFE_NAME.test(character)) return false
  const chars = await getGameCharacters(accountId)
  return chars.some((c) => c.name === character)
}

export interface ListResult {
  success: boolean
  error?: string
  minutes?: number
  items?: DeletedItem[]
}

/** Lista los ítems borrados recuperables de un personaje (cooldown 8 h). */
export async function listDeletedItems(accountId: number, character: string): Promise<ListResult> {
  if (!(await ownsCharacter(accountId, character))) return { success: false, error: 'characterNotOwned' }

  // Cooldown de 8 h por personaje.
  try {
    const [last] = await db(DB.default).query<RowDataPacket[]>(
      'SELECT used_at FROM home_itemsearchhistory WHERE character_name = ? ORDER BY used_at DESC LIMIT 1',
      [character],
    )
    if (last[0]) {
      const diff = Date.now() - new Date(last[0].used_at).getTime()
      if (diff < SEARCH_COOLDOWN_MS) {
        return { success: false, error: 'cooldown', minutes: Math.ceil((SEARCH_COOLDOWN_MS - diff) / 60000) }
      }
    }
  } catch {
    /* ignore */
  }

  const soap = await executeSoapCommand(`.item restore list ${character}`)
  if (soap === null) return { success: false, error: 'soapError' }

  await db(DB.default)
    .query('INSERT INTO home_itemsearchhistory (character_name, used_at) VALUES (?, NOW())', [character])
    .catch(() => {})
  return { success: true, items: parseRecoverList(soap) }
}

export interface RestoreResult {
  success: boolean
  error?: string
  name?: string
}

/** Restaura un ítem borrado (cuesta 100 PD; reembolsa si el SOAP falla). */
export async function restoreItem(accountId: number, character: string, recoverId: number): Promise<RestoreResult> {
  if (!(await ownsCharacter(accountId, character))) return { success: false, error: 'characterNotOwned' }
  if (!Number.isInteger(recoverId) || recoverId <= 0) return { success: false, error: 'invalidRequest' }

  // Cobra 100 PD de forma atómica.
  let charged = false
  try {
    const [res] = await db(DB.default).query(
      'UPDATE home_api_points SET dp = dp - ? WHERE accountID = ? AND dp >= ?',
      [RESTORE_ITEM_PD, accountId, RESTORE_ITEM_PD],
    )
    // @ts-expect-error affectedRows
    charged = res.affectedRows === 1
  } catch {
    return { success: false, error: 'genericError' }
  }
  if (!charged) return { success: false, error: 'insufficientPoints' }

  const soap = await executeSoapCommand(`.item restore ${recoverId} ${character}`)
  if (soap === null) {
    await db(DB.default)
      .query('UPDATE home_api_points SET dp = dp + ? WHERE accountID = ?', [RESTORE_ITEM_PD, accountId])
      .catch(() => {})
    return { success: false, error: 'soapError' }
  }

  return { success: true }
}