import { h, Component } from "preact"
import Notes, { IVault, BaseNote } from "../../../notes";
import AddButton from "../../AddButton";
import Navigation from "../../../navigation";
import ArrowLeft from "feather-icons/dist/icons/arrow-left.svg"
import Search from "feather-icons/dist/icons/search.svg"
import ContextMenu from "../../context";
import Notifications from "../../../notifications";
import { Observable, Lock } from "@hibas123/utils";


export default class EntryList extends Component<{ vault: Promise<IVault> }, { notes: BaseNote[], context: JSX.Element | undefined }> {
   rawNotes: BaseNote[];

   private searchObservableServer = new Observable<void>(1000);
   private searchObservable = this.searchObservableServer.getPublicApi();

   constructor(props) {
      super(props)
      console.log("Creating new Instance of EntryList")
      this.state = { notes: [], context: undefined }
      this.onDragOver = this.onDragOver.bind(this);
      this.onDrop = this.onDrop.bind(this);
      this.reloadNotes = this.reloadNotes.bind(this);
      this.searchChanged = this.searchChanged.bind(this);
   }
   vault: IVault;

   async reloadNotes(s?: boolean) {
      if (s)
         return;
      this.rawNotes = await this.vault.getAllNotes();
      await this.applySearch(true);
   }

   async componentWillMount() {
      this.vault = await this.props.vault;
      this.reloadNotes();
      document.body.addEventListener("dragover", this.onDragOver);
      document.body.addEventListener("drop", this.onDrop);
      Notes.syncObservable.subscribe(this.reloadNotes);
      this.searchObservable.subscribeCollect(() => this.applySearch());
   }

   componentWillUnmount() {
      document.body.removeEventListener("dragover", this.onDragOver);
      document.body.removeEventListener("drop", this.onDrop);
      Notes.syncObservable.unsubscribe(this.reloadNotes);
   }

   componentDidMount() {
      console.log("ON Component Did mount", this.search);
      this.searchInput.value = this.search;
   }

   onDragOver(evt: DragEvent) {
      evt.preventDefault();
   }

   onContext(evt: MouseEvent, note: BaseNote) {
      evt.preventDefault();
      evt.stopPropagation();

      const close = () => {
         document.documentElement.removeEventListener("click", close);
         this.setState({ context: undefined });
      }
      document.documentElement.addEventListener("click", close);


      const shareNote = async () => {
         let nav = window.navigator as any;
         if (nav.share !== undefined) {
            let vnote = await this.vault.getNote(note._id);
            nav.share({ title: vnote.preview.split("\n")[0], text: vnote.__value })
               .then(() => console.log('Successful share'))
               .catch(error => {
                  console.error('Error sharing:', error)
                  Notifications.sendError(error)
               });
         } else {
            Notifications.sendError("Sharing not possible on this device")
         }
      }

      const deleteNote = async () => {
         this.vault.deleteNote(note._id).then(() => {
            Notifications.sendSuccess("Deleted")
            this.rawNotes = this.rawNotes.filter(e => e._id !== note._id);
            this.setState({ notes: this.state.notes.filter(e => e._id !== note._id) });
         }).catch(err => {
            Notifications.sendError(err);
         })
      }

      const copyNote = async () => {
         this.vault.getNote(note._id).then(note => {
            const el = document.createElement('textarea');
            el.value = note.__value;
            document.body.appendChild(el);
            el.select();
            document.execCommand('copy');
            document.body.removeChild(el);
            Notifications.sendSuccess("Copied");
         })
      }

      let share;
      if ((window.navigator as any).share) {
         share = <button class="btn" onClick={shareNote}>
            share
         </button>
      }

      let context = <ContextMenu event={evt} >
         {share}
         <button class="btn" onClick={deleteNote}>delete</button>
         <button class="btn" onClick={copyNote}>copy</button>
      </ContextMenu>

      this.setState({ context });
      return false;
   }

   async onDrop(evt: DragEvent) {
      evt.preventDefault();
      if (evt.dataTransfer.items) {
         for (let i = 0; i < evt.dataTransfer.items.length; i++) {
            let item = evt.dataTransfer.items[i];

            if (item.kind === "file") {
               let file = item.getAsFile();
               if (file.type !== "application/json") {
                  Notifications.sendError("Invalid File Type!!!")
               } else {
                  try {
                     let data = await new Promise<string>((yes, no) => {
                        let fr = new FileReader()
                        fr.onload = (ev) => {
                           yes((ev.target as any).result);
                        }
                        fr.onerror = no;
                        fr.readAsText(file);
                     })
                     let parsed = JSON.parse(data);
                     let c = new Error("Could not parse!");
                     let notes: { content: string, time: Date }[] = null;
                     if (Array.isArray(parsed)) { // Could be from SecureNotes 1
                        notes = parsed.map(elm => {
                           if (typeof elm.message !== "string" || typeof elm.time !== "string") {
                              throw c;
                           }

                           return {
                              content: elm.message,
                              time: new Date(elm.time)
                           }
                        })
                     } else if (parsed.version) { // Could be from SecureNotes 2
                        if (parsed.version === 1) { //Could be from SecureNotes 2 version 1
                           notes = (parsed.notes as any[]).map(elm => {
                              if (typeof elm.content !== "string" || typeof elm.time !== "string") {
                                 throw c;
                              }
                              return {
                                 content: elm.content,
                                 time: new Date(elm.time)
                              }
                           })
                        } else {
                           throw c;
                        }
                     } else
                        throw c;

                     await Promise.all(notes.map(n => {
                        let note = this.vault.newNote();
                        note.__value = n.content;
                        return this.vault.saveNote(note, n.time);
                     }));
                     await this.reloadNotes();
                     Notifications.sendSuccess(`Imported ${notes.length} notes!`);
                  } catch (err) {
                     Notifications.sendError("Cannot read File!")
                     console.error(err);
                  }
               }
            }
         }
      }
   }

   searchLock = new Lock();
   oldSearch = "";
   async applySearch(force = false) {
      const search = this.search.toLowerCase();
      if (!force && search === this.oldSearch) {
         return;
      }

      if (this.searchLock.locked)
         return;
      const lock = await this.searchLock.getLock();
      console.time("SearchOP");

      let notes: BaseNote[] = [];

      if (search === "") {
         notes = this.rawNotes;
      } else {
         const parts = search.split(" ");
         const match = (note: BaseNote) => {
            return parts.every(function (el) {
               return note.preview.toLowerCase().indexOf(el) > -1;
            });
         }

         let elements: BaseNote[];
         if (!force && this.oldSearch && search.startsWith(this.oldSearch)) {
            elements = [...this.state.notes];
         } else {
            elements = [...this.rawNotes];
         }


         await new Promise(yes => {
            const idle = () => {
               window.requestIdleCallback(deadline => {
                  let invTR = deadline.timeRemaining() <= 0;
                  while ((deadline.timeRemaining() > 0 || invTR) && elements.length > 0) {
                     let element = elements.shift();
                     if (match(element)) {
                        notes.push(element);
                     }
                  }
                  if (elements.length > 0)
                     idle();
                  else
                     yes();
               }, { timeout: 100 });
            }
            idle();
         })
         // notes = elements.filter(note => match(note));
      }

      await new Promise(yes => this.setState({ notes }, yes));
      this.oldSearch = search;
      lock.release();
      console.timeEnd("SearchOP");
   }

   search = "";
   searchChanged(evt: Event) {
      let input = evt.target as HTMLInputElement;
      this.search = input.value;
      this.searchObservableServer.send();
   }

   searchInput: HTMLInputElement;
   render() {
      const open_entry = (id: string | null) => {
         Navigation.setPage("/vault", { id: this.vault.id }, { id, entry: "true" })
      }

      return <div>
         {this.state.context}
         <header class="header">
            <a class="header-icon-button" onClick={() => history.back()}><ArrowLeft height={undefined} width={undefined} /></a>
            <h3 style="display:inline" class="header-title" onClick={() => Navigation.setPage("/")}>{this.vault ? this.vault.name : ""}</h3>
            <span></span>
            {/* <a class="button header_icon_button"><MoreVertival height={undefined} width={undefined} /></a> */}
         </header>
         <AddButton onClick={() => open_entry(null)} />
         <div class="container">
            <div style="display:flex;">
               <input class="inp" type="text" style="width: 100%; height: 40px;" onKeyUp={this.searchChanged} ref={elm => this.searchInput = elm} />
               <button class="btn btn-primary" style="padding: 5px 10px; margin: 0; height: 40px; width: 40px;">
                  <Search />
               </button>
            </div>

            <div class="vault-list" style="margin-top: 1rem;">
               {this.state.notes.map(note => {
                  let [first, second] = note.preview.split("\n", 2);
                  return <div class="card vault-vault" onContextMenu={evt => this.onContext(evt, note)} onClick={() => {
                     open_entry(note._id)
                  }}>
                     <div>{first}</div>
                     <div>{second}</div>
                  </div>
               })}
            </div>
         </div>
      </div>;
   }
}