import type { RowDataPacket } from 'mysql2'
import { db, DB } from './db'

// Armería: búsqueda de personajes/ítems/hermandades y ficha de personaje con equipo.
// Datos de personaje/equipo en acore_characters; datos de ítem (nombre/calidad/
// display_id) en django_wow.item_data (importado de los db2; item_template no existe
// en 3.4.3). Se resuelve en dos pasos para no depender de joins entre esquemas.

export interface CharacterResult {
  guid: number
  name: string
  race: number
  gender: number
  class: number
  level: number
}

export interface ItemResult {
  entry: number
  name: string
  quality: number
  itemLevel: number
  inventoryType: number
}

export interface GuildResult {
  guildid: number
  name: string
  members: number
}

export interface EquipItem {
  slot: number
  entry: number
  name: string
  quality: number
  itemLevel: number
  inventoryType: number
  displayId: number | null
  transmogEntry: number | null
  transmogDisplayId: number | null
}

const LIMIT = 25

export async function searchCharacters(q: string, limit = LIMIT): Promise<CharacterResult[]> {
  try {
    const [rows] = await db(DB.characters).query<RowDataPacket[]>(
      'SELECT guid, name, race, gender, class, level FROM characters WHERE name LIKE ? ORDER BY level DESC, name LIMIT ?',
      [`%${q}%`, limit],
    )
    return rows.map((r) => ({
      guid: r.guid,
      name: r.name,
      race: r.race,
      gender: r.gender,
      class: r.class,
      level: r.level,
    }))
  } catch {
    return []
  }
}

export async function searchGuilds(q: string, limit = LIMIT): Promise<GuildResult[]> {
  try {
    const [rows] = await db(DB.characters).query<RowDataPacket[]>(
      `SELECT g.guildid, g.name, (SELECT COUNT(*) FROM guild_member gm WHERE gm.guildid = g.guildid) AS members
       FROM guild g WHERE g.name LIKE ? ORDER BY members DESC LIMIT ?`,
      [`%${q}%`, limit],
    )
    return rows.map((r) => ({ guildid: r.guildid, name: r.name, members: Number(r.members ?? 0) }))
  } catch {
    return []
  }
}

export async function searchItems(q: string, locale: string, limit = LIMIT): Promise<ItemResult[]> {
  const col = locale === 'en' ? 'name_en' : 'name_es'
  try {
    const [rows] = await db(DB.default).query<RowDataPacket[]>(
      `SELECT entry, COALESCE(${col}, name_en) AS name, quality, item_level, inventory_type
       FROM item_data WHERE ${col} LIKE ? OR name_en LIKE ? ORDER BY item_level DESC LIMIT ?`,
      [`%${q}%`, `%${q}%`, limit],
    )
    return rows.map((r) => ({
      entry: r.entry,
      name: r.name,
      quality: r.quality,
      itemLevel: r.item_level,
      inventoryType: r.inventory_type,
    }))
  } catch {
    return []
  }
}

export async function getCharacter(guid: number): Promise<
  (CharacterResult & { guildName: string | null; guildId: number | null; online: boolean }) | null
> {
  try {
    const [rows] = await db(DB.characters).query<RowDataPacket[]>(
      'SELECT guid, name, race, gender, class, level, online FROM characters WHERE guid = ?',
      [guid],
    )
    const c = rows[0]
    if (!c) return null
    let guildName: string | null = null
    let guildId: number | null = null
    try {
      const [g] = await db(DB.characters).query<RowDataPacket[]>(
        `SELECT gu.guildid, gu.name FROM guild_member gm JOIN guild gu ON gu.guildid = gm.guildid WHERE gm.guid = ?`,
        [guid],
      )
      if (g[0]) {
        guildId = g[0].guildid
        guildName = g[0].name
      }
    } catch {
      /* sin hermandad */
    }
    return {
      guid: c.guid,
      name: c.name,
      race: c.race,
      gender: c.gender,
      class: c.class,
      level: c.level,
      online: c.online === 1,
      guildName,
      guildId,
    }
  } catch {
    return null
  }
}

/** Ítems equipados (slots 0-18) del personaje, resueltos con item_data. */
export async function getCharacterEquipment(guid: number, locale: string): Promise<EquipItem[]> {
  const col = locale === 'en' ? 'name_en' : 'name_es'
  try {
    const [inv] = await db(DB.characters).query<RowDataPacket[]>(
      `SELECT ci.slot, ii.itemEntry, ii.transmogrification
       FROM character_inventory ci JOIN item_instance ii ON ii.guid = ci.item
       WHERE ci.guid = ? AND ci.bag = 0 AND ci.slot <= 18 ORDER BY ci.slot`,
      [guid],
    )
    if (inv.length === 0) return []

    // Resolver todos los entries (equipados + transmog) en una consulta a item_data.
    const entries = [
      ...new Set(inv.flatMap((r) => [Number(r.itemEntry), Number(r.transmogrification)]).filter((n) => n > 0)),
    ]
    const meta = new Map<number, RowDataPacket>()
    if (entries.length) {
      const [items] = await db(DB.default).query<RowDataPacket[]>(
        `SELECT entry, COALESCE(${col}, name_en) AS name, quality, item_level, inventory_type, display_id
         FROM item_data WHERE entry IN (${entries.map(() => '?').join(',')})`,
        entries,
      )
      for (const it of items) meta.set(Number(it.entry), it)
    }

    return inv.map((r) => {
      const entry = Number(r.itemEntry)
      const tmog = Number(r.transmogrification) || null
      const m = meta.get(entry)
      const tm = tmog ? meta.get(tmog) : undefined
      return {
        slot: r.slot,
        entry,
        name: m?.name ?? `#${entry}`,
        quality: m ? Number(m.quality) : 0,
        itemLevel: m ? Number(m.item_level) : 0,
        inventoryType: m ? Number(m.inventory_type) : 0,
        displayId: m && m.display_id != null ? Number(m.display_id) : null,
        transmogEntry: tmog,
        transmogDisplayId: tm && tm.display_id != null ? Number(tm.display_id) : null,
      }
    })
  } catch {
    return []
  }
}

export interface GuildMember {
  guid: number
  name: string
  race: number
  class: number
  level: number
  rank: number
}

export async function getGuild(
  guildid: number,
): Promise<{ guildid: number; name: string; members: GuildMember[]; leaderName: string | null } | null> {
  try {
    const [g] = await db(DB.characters).query<RowDataPacket[]>(
      'SELECT guildid, name, leaderguid FROM guild WHERE guildid = ?',
      [guildid],
    )
    if (!g[0]) return null
    const [members] = await db(DB.characters).query<RowDataPacket[]>(
      `SELECT c.guid, c.name, c.race, c.class, c.level, gm.rank
       FROM guild_member gm JOIN characters c ON c.guid = gm.guid
       WHERE gm.guildid = ? ORDER BY gm.rank, c.level DESC`,
      [guildid],
    )
    const list = members.map((m) => ({
      guid: m.guid,
      name: m.name,
      race: m.race,
      class: m.class,
      level: m.level,
      rank: m.rank,
    }))
    const leader = list.find((m) => m.guid === g[0].leaderguid)
    return { guildid: g[0].guildid, name: g[0].name, members: list, leaderName: leader?.name ?? null }
  } catch {
    return null
  }
}