'use strict'

const webhooksMixin = {
  _webhookGossipKeys: null,
  _webhookRegistryHealWatermark: null,
  _webhookExecuteHealWatermark: null,

  _initWebhooksMixinState () {
    if (!this._webhookGossipKeys) {
      this._webhookGossipKeys = new Set()
    }
  },

  _shouldGossipWebhookUpsert (hook) {
    this._initWebhooksMixinState()
    if (!hook?.guildId || !hook?.id) return true
    const hash = `${hook.guildId}:${hook.id}:${hook.name || ''}:${hook.channelId || ''}:${hook.avatarUrl || ''}:${hook.managed ? 1 : 0}:${hook.createdAt || 0}`
    if (this._webhookGossipKeys.has(hash)) return false
    this._webhookGossipKeys.add(hash)
    if (this._webhookGossipKeys.size > 8192) {
      const first = this._webhookGossipKeys.values().next().value
      if (first) this._webhookGossipKeys.delete(first)
    }
    return true
  },

  async _healWebhookRegistryOnPartition (guildId) {
    const gid = guildId || this.guild?.guild?.id || null
    const span = this.log.time('webhook.heal', {
      spanKind: 'webhook.heal',
      guildId: gid,
      slice: 'registry'
    })
    try {
      if (!gid || !this.listChannelWebhooks) {
        span.end({ relisted: 0, skipped: true })
        return { relisted: 0, skipped: true }
      }
      const rows = await this.listChannelWebhooks().catch(() => [])
      let relisted = 0
      for (const row of rows) {
        if (row.guildId && row.guildId !== gid) continue
        if (this._shouldGossipWebhookUpsert(row) && this.guild?.gossipWebhookUpsert) {
          this.guild.gossipWebhookUpsert(row)
          relisted++
        }
      }
      const watermark = Date.now()
      this._webhookRegistryHealWatermark = watermark
      span.end({ relisted, watermark, guildWebhookCount: rows.length })
      return { relisted, watermark, guildWebhookCount: rows.length }
    } catch (err) {
      this.log.error('webhook.heal error', {
        guildId: gid,
        slice: 'registry',
        error: err?.message || String(err)
      })
      span.fail(err)
      return { relisted: 0, error: err?.message || String(err) }
    }
  },

  async _healWebhookExecuteCursorOnPartition (guildId) {
    const gid = guildId || this.guild?.guild?.id || null
    const span = this.log.time('webhook.execute', {
      spanKind: 'webhook.execute',
      guildId: gid,
      context: 'heal.cursor'
    })
    try {
      if (!gid) {
        span.end({ relisted: 0, skipped: true, guildWebhookCount: 0 })
        return { relisted: 0, skipped: true }
      }
      const list = await this.listChannelWebhooks().catch(() => [])
      const watermark = Date.now()
      this._webhookExecuteHealWatermark = watermark
      span.end({
        relisted: 0,
        watermark,
        guildWebhookCount: list.length,
        channelWebhookCount: new Set(list.map((h) => h.channelId).filter(Boolean)).size,
        guildCount: (this.guilds || []).length,
        activeChannelId: this.activeChannelId || null,
        bridgeKind: 'webhook.execute'
      })
      return { relisted: 0, watermark, guildWebhookCount: list.length }
    } catch (err) {
      this.log.error('webhook.execute error', {
        guildId: gid,
        context: 'heal.cursor',
        error: err?.message || String(err)
      })
      span.fail(err)
      return { relisted: 0, error: err?.message || String(err) }
    }
  }
}

module.exports = { webhooksMixin }