import { Injectable } from '@angular/core';
import { Storage } from '@ionic/storage';
import { environment } from 'src/environments/environment';

@Injectable({
  providedIn: 'root'
})
export class ChatStorageService {

  constructor(
    private storage: Storage,
  ) { }

  /**
   * @description delete message in the DB. get all messages, delete then corresponding message and update the store
   * @param id  message ID
   */

  async deleteMessageFromDb(messageId, roomId) {
    if (environment.chatOffline) {
      await this.storage.get('chatmsg' + roomId).then(async(messages: any = []) => {
        if(!Array.isArray(messages)) {
          messages = []
        }
  
        await messages.forEach( async (message, index) => {
  
          if(message._id == messageId) {
            messages.splice(index, 1)
          }
  
        })
  
        this.storage.set('chatmsg' + roomId, messages).then((value) => {
          // console.log('MSG SAVED ON STORAGE', value)
        });
        
      })
    }
  }

  async updateMessageDB(ChatMessage, roomId, identificator) {

    if (environment.chatOffline) { 
      await this.storage.get('chatmsg' + roomId).then(async(messages: any = []) => {
        if(!Array.isArray(messages)) {
          messages = []
        }

        let index;
        const find = messages.find((message, _index)=> {

          if(message?.localReference == ChatMessage?.localReference || 
            message?._id == ChatMessage?._id) {
            index = _index
            return true
          }

          return false
        })

        if(find) {
          
          
          messages[index] =  Object.assign(messages[index], ChatMessage)

          await this.storage.set('chatmsg' + roomId, messages)
        } else {
          // console.log('failed to update', identificator, ':',ChatMessage)
        }
        
      })
    }

  }

  async updateChat(history, roomId, identificator = '_id') {
    if (environment.chatOffline) { 
      await this.storage.get('chatmsg' + roomId).then(async(messages: any = []) => {
        if(!Array.isArray(messages)) {
          messages = []
        }

        history.forEach( async(ChatMessage)=>{
          let index;
          const find = messages.find((message, _index)=> {
  
            if(message[identificator]) {
              if(message[identificator] == ChatMessage[identificator]) {
                index = _index
                return true
              }
            }
  
            return false
          })
  
          if(find) {
            
            
            messages[index] =  Object.assign(messages[index], ChatMessage)
  
            // if(messages[index].msg.includes('***********')) {
            //   console.log('storage update') 
            //   console.log(JSON.stringify(messages[index]))
            //   console.log(JSON.stringify(ChatMessage))
            // }
  
            await this.storage.set('chatmsg' + roomId, messages)
          } else {
            console.log('failed to update', identificator)
          }
        })


        
      })
    }
  }

  async addMessageDB(ChatMessage, roomId) {
    if (environment.chatOffline) {
      await this.storage.get('chatmsg' + roomId).then(async(messages: any = []) => {
        if(!Array.isArray(messages)) {
          messages = []
        }


        if(!ChatMessage._id && environment.chatOffline) {

          delete ChatMessage.temporaryData
          messages.push(ChatMessage)
          console.log('no ID')
          
          await this.storage.set('chatmsg' + roomId, messages)
          // console.log('add to DB', ChatMessage)

        } else {
          const find = messages.find((message)=> {
            return message._id == ChatMessage._id
          })

          if(!find) {
            delete ChatMessage.temporaryData
            messages.push(ChatMessage)
            await this.storage.set('chatmsg' + roomId, messages)
            // console.log('add to DB', ChatMessage)
          } else {
            console.log('duplicate')
          }

        }
      })
    }
  }

  async addManyMessageDB(_ChatMessage: any[], roomId) {
    if (environment.chatOffline) {
      await this.storage.get('chatmsg' + roomId).then(async(messages: any = []) => {
        if(!Array.isArray(messages)) {
          messages = []
        }

        await _ChatMessage.forEach(async(ChatMessage)=>{
          if(!ChatMessage._id && environment.chatOffline) {

            delete ChatMessage.temporaryData
            messages.push(ChatMessage)
            // console.log('add to DB')
  
          } else {
            const find = messages.find((message)=> {
              return message._id == ChatMessage._id
            })
  
            if(!find) {
              delete ChatMessage.temporaryData
              messages.push(ChatMessage)
              // console.log('add to DB')
              
              
            }
          }
        })  

        await this.storage.set('chatmsg' + roomId, messages)

      })
    }
  }
  
}