import { Controller } from "@hotwired/stimulus"
import { Nostrify } from "nostrify"

// Connects to data-controller="settings--nostr-pubkey"
export default class extends Controller {
  static targets = [
    "noExtension",
    "setPubkey", "pubkeyBech32Input",
    "relayList", "relayListStatus",
    "profileStatusNip05", "profileStatusLud16"
  ]
  static values  = {
    userAddress: String,
    pubkeyHex: String,
    site: String,
    sharedSecret: String
  }

  connect () {
    if (window.nostr) {
      if (this.hasSetPubkeyTarget) {
        this.setPubkeyTarget.disabled = false
      }

      if (this.pubkeyHexValue) {
        this.discoverUserOnNostr().then(() => {
          this.renderRelayStatus()
          this.renderProfileNip05Status()
          this.renderProfileLud16Status()
        })
      }
    } else {
      this.noExtensionTarget.classList.remove("hidden")
    }
  }

  async setPubkey () {
    this.setPubkeyTarget.disabled = true

    try {
      // Auth based on NIP-42
      const signedEvent = await window.nostr.signEvent({
        created_at: Math.floor(Date.now() / 1000),
        kind: 22242,
        tags: [
          ["site", this.siteValue],
          ["challenge", this.sharedSecretValue]
        ],
        content: ""
      })

      const res = await fetch("/settings/set_nostr_pubkey", {
        method: "POST", credentials: "include", headers: {
          "Accept": "application/json", 'Content-Type': 'application/json',
          "X-CSRF-Token": this.csrfToken
        }, body: JSON.stringify({ signed_event: signedEvent })
      });

      window.location.reload()
    } catch (error) {
      console.warn('Unable to verify pubkey:', error.message)
      this.setPubkeyTarget.disabled = false
    }
  }

  async discoverUserOnNostr () {
    this.nip65Relays = await this.findUserRelays()
    this.profile = await this.findUserProfile()
  }

  async findUserRelays () {
    const controller = new AbortController();
    const signal = controller.signal;
    const filters = [{ kinds: [10002], authors: [this.pubkeyHexValue], limit: 1 }]
    const messages = []

    for await (const msg of this.discoveryPool.req(filters, { signal })) {
      if (msg[0] === 'EVENT') {
        if (!messages.find(m => m.id === msg[2].id)) {
          messages.push(msg[2])
        }
      }
      if (msg[0] === 'EOSE') { break }
    }

    // Close the relay subscription
    controller.abort()
    if (messages.length === 0) { return messages }

    const sortedMessages = messages.sort((a, b) => a.createdAt - b.createdAt)
    const newestMessage = messages[messages.length - 1]

    return newestMessage.tags.filter(t => t[0] === 'r')
                             .map(t => { return { url: t[1], marker: t[2] } })
  }

  async findUserProfile () {
    const controller = new AbortController();
    const signal = controller.signal;
    const filters = [{ kinds: [0], authors: [this.pubkeyHexValue], limit: 1 }]
    const messages = []

    for await (const msg of this.discoveryPool.req(filters, { signal })) {
      if (msg[0] === 'EVENT') {
        if (!messages.find(m => m.id === msg[2].id)) {
          messages.push(msg[2])
        }
      }
      if (msg[0] === 'EOSE') { break }
    }

    // Close the relay subscription
    controller.abort()
    if (messages.length === 0) { return null }

    const sortedMessages = messages.sort((a, b) => a.createdAt - b.createdAt)
    const newestMessage = messages[messages.length - 1]

    return JSON.parse(newestMessage.content)
  }

  renderRelayStatus () {
    let showStatus

    if (this.nip65Relays.length > 0) {
      if (this.relaysContainAccountsRelay) {
        showStatus = 'green'
      } else {
        showStatus = 'orange'
      }
    } else {
      showStatus = 'red'
    }
    // showStatus = 'red'

    this.relayListStatusTarget
      .querySelector(`.status-${showStatus}`)
      .classList.remove("hidden")
  }

  renderProfileNip05Status () {
    let showStatus

    if (this.profile?.nip05) {
      if (this.profile.nip05 === this.userAddressValue) {
        showStatus = 'green'
      } else {
        showStatus = 'red'
      }
    } else {
      showStatus = 'orange'
    }

    this.profileStatusNip05Target
      .querySelector(`.status-${showStatus}`)
      .classList.remove("hidden")
  }

  renderProfileLud16Status () {
    let showStatus

    if (this.profile?.lud16) {
      if (this.profile.lud16 === this.userAddressValue) {
        showStatus = 'green'
      } else {
        showStatus = 'red'
      }
    } else {
      showStatus = 'orange'
    }

    this.profileStatusLud16Target
      .querySelector(`.status-${showStatus}`)
      .classList.remove("hidden")
  }

  // renderRelayList (relays) {
  //   const html = relays.map(relay => `
  //     <li class="flex items-center justify-between p-2 border-b">
  //       <span>${relay.url}</span>
  //       <button 
  //         data-action="click->list#handleItemClick" 
  //         data-item="${relay.url}"
  //         class="bg-blue-500 text-white px-3 py-1 rounded">
  //         Action
  //       </button>
  //     </li>
  //   `).join("")
  //
  //   this.relayListTarget.innerHTML = html
  // }

  get csrfToken () {
    const element = document.head.querySelector('meta[name="csrf-token"]')
    return element.getAttribute("content")
  }

  // Used to find a user's profile and relays
  get discoveryRelays () {
    return [
      'ws://localhost:4777',
      'wss://nostr.kosmos.org',
      'wss://purplepag.es',
      // 'wss://relay.nostr.band',
      // 'wss://njump.me',
      // 'wss://relay.damus.io',
      // 'wss://nos.lol',
      // 'wss://eden.nostr.land',
      // 'wss://relay.snort.social',
      // 'wss://nostr.wine',
      // 'wss://relay.primal.net',
      // 'wss://nostr.bitcoiner.social',
    ]
  }

  get discoveryPool () {
    if (!this._discoveryPool) {
      this._discoveryPool = new Nostrify.NPool({
        open: (url) => new Nostrify.NRelay1(url),
        reqRouter: async (filters) => new Map(
          this.discoveryRelays.map(relayUrl => [ relayUrl, filters ])
        ),
        eventRouter: async (event) => [],
      })
    }

    return this._discoveryPool
  }

  get relaysContainAccountsRelay () {
    // TODO use URL from view/settings
    return !!this.nip65Relays.find(r => r.url.match('wss://nostr.kosmos.org'))
  }
}