/**
 * Represents a Message on Discord
 */
class Message {
  constructor(channel, data, client) {
    this.channel = channel;

    if (channel.guild) {
      this.guild = channel.guild;
    }

    this.client = client;
    if (data) {
      this.setup(data);
    }
  }

  setup(data) {
    this.author = this.client.store.newUser(data.author);
    this.content = data.content;
    this.timestamp = new Date(data.timestamp);
    this.editedTimestamp = data.edited_timestamp ? new Date(data.edited_timestamp) : null;
    this.tts = data.tts;
    this.mentionEveryone = data.mention_everyone;
    this.nonce = data.nonce;
    this.embeds = data.embeds;
    this.attachments = data.attachments;
    this.mentions = [];
    this.id = data.id;
    for (const mention of data.mentions) {
      let user = this.client.store.get('users', mention.id);
      if (user) {
        this.mentions.push(user);
      } else {
        user = this.client.store.newUser(mention);
        this.mentions.push(user);
      }
    }
  }

  patch(data) {
    if (data.author) {
      this.author = this.client.store.get('users', data.author.id);
    }
    if (data.content) {
      this.content = data.content;
    }
    if (data.timestamp) {
      this.timestamp = new Date(data.timestamp);
    }
    if (data.edited_timestamp) {
      this.editedTimestamp = data.edited_timestamp ? new Date(data.edited_timestamp) : null;
    }
    if (data.tts) {
      this.tts = data.tts;
    }
    if (data.mention_everyone) {
      this.mentionEveryone = data.mention_everyone;
    }
    if (data.nonce) {
      this.nonce = data.nonce;
    }
    if (data.embeds) {
      this.embeds = data.embeds;
    }
    if (data.attachments) {
      this.attachments = data.attachments;
    }
    if (data.mentions) {
      for (const mention of data.mentions) {
        let user = this.client.store.get('users', mention.id);
        if (user) {
          this.mentions.push(user);
        } else {
          user = this.client.store.newUser(mention);
          this.mentions.push(user);
        }
      }
    }

    if (data.id) {
      this.id = data.id;
    }
  }

  equals(message, rawData) {
    const embedUpdate = !message.author && !message.attachments;

    if (embedUpdate) {
      const base = this.id === message.id &&
        this.embeds.length === message.embeds.length;
      return base;
    }
    let base = this.id === message.id &&
        this.author.id === message.author.id &&
        this.content === message.content &&
        this.tts === message.tts &&
        this.nonce === message.nonce &&
        this.embeds.length === message.embeds.length &&
        this.attachments.length === message.attachments.length;

    if (base && rawData) {
      base = this.mentionEveryone === message.mentionEveryone &&
        this.timestamp.getTime() === new Date(rawData.timestamp).getTime() &&
        this.editedTimestamp === new Date(rawData.edited_timestamp).getTime();
    }

    return base;
  }

  delete() {
    return this.client.rest.methods.deleteMessage(this);
  }

  edit(content) {
    return this.client.rest.methods.updateMessage(this, content);
  }
}

module.exports = Message;