import Vex = require("vexflow");
import { Staff } from "../../VoiceData/Staff";
import { SourceMeasure } from "../../VoiceData/SourceMeasure";
import { VexFlowMeasure } from "./VexFlowMeasure";
import { VexFlowStaffEntry } from "./VexFlowStaffEntry";
import { VexFlowConverter } from "./VexFlowConverter";
import { StaffLine } from "../StaffLine";
import { GraphicalVoiceEntry } from "../GraphicalVoiceEntry";
import { VexFlowVoiceEntry } from "./VexFlowVoiceEntry";
import { Arpeggio } from "../../VoiceData/Arpeggio";
import { Voice } from "../../VoiceData/Voice";
import * as log from "loglevel";

export class VexFlowTabMeasure extends VexFlowMeasure {
    constructor(staff: Staff, sourceMeasure: SourceMeasure = undefined, staffLine: StaffLine = undefined) {
        super(staff, sourceMeasure, staffLine);
    }

    /**
     * Reset all the geometric values and parameters of this measure and put it in an initialized state.
     * This is needed to evaluate a measure a second time by system builder.
     */
    public resetLayout(): void {
        // Take into account some space for the begin and end lines of the stave
        // Will be changed when repetitions will be implemented
        //this.beginInstructionsWidth = 20 / UnitInPixels;
        //this.endInstructionsWidth = 20 / UnitInPixels;
        this.stave = new Vex.Flow.TabStave(0, 0, 0, {
            space_above_staff_ln: 0,
            space_below_staff_ln: 0,
        });
        this.updateInstructionWidth();
    }

    public graphicalMeasureCreatedCalculations(): void {
        for (let idx: number = 0, len: number = this.staffEntries.length; idx < len; ++idx) {
            const graphicalStaffEntry: VexFlowStaffEntry = (this.staffEntries[idx] as VexFlowStaffEntry);

            // create vex flow Notes:
            for (const gve of graphicalStaffEntry.graphicalVoiceEntries) {
                if (gve.notes[0].sourceNote.isRest()) {
                    (gve as VexFlowVoiceEntry).vfStaveNote = VexFlowConverter.GhostNote(gve.notes[0].sourceNote.Length);
                } else {
                    (gve as VexFlowVoiceEntry).vfStaveNote = VexFlowConverter.CreateTabNote(gve);
                }
            }
        }

        this.finalizeTuplets();

        const voices: Voice[] = this.getVoicesWithinMeasure();

        for (const voice of voices) {
            if (voice === undefined) {
                continue;
            }

            // add a vexFlow voice for this voice:
            this.vfVoices[voice.VoiceId] = new Vex.Flow.Voice({
                        beat_value: this.parentSourceMeasure.Duration.Denominator,
                        num_beats: this.parentSourceMeasure.Duration.Numerator,
                        resolution: Vex.Flow.RESOLUTION,
                    }).setMode(Vex.Flow.Voice.Mode.SOFT);

            const restFilledEntries: GraphicalVoiceEntry[] =  this.getRestFilledVexFlowStaveNotesPerVoice(voice);
            // create vex flow voices and add tickables to it:
            for (const voiceEntry of restFilledEntries) {
                if (voiceEntry.parentVoiceEntry) {
                    if (voiceEntry.parentVoiceEntry.IsGrace && !voiceEntry.parentVoiceEntry.GraceAfterMainNote) {
                        continue;
                    }
                }

                const vexFlowVoiceEntry: VexFlowVoiceEntry = voiceEntry as VexFlowVoiceEntry;
                if (voiceEntry.notes.length === 0 || !voiceEntry.notes[0] || !voiceEntry.notes[0].sourceNote.PrintObject) {
                    // GhostNote, don't add modifiers like in-measure clefs
                    this.vfVoices[voice.VoiceId].addTickable(vexFlowVoiceEntry.vfStaveNote);
                    continue;
                }

                // add fingering
                if (voiceEntry.parentVoiceEntry && this.rules.RenderFingerings) {
                    this.createFingerings(voiceEntry);
                }

                // add Arpeggio
                if (voiceEntry.parentVoiceEntry && voiceEntry.parentVoiceEntry.Arpeggio !== undefined) {
                    const arpeggio: Arpeggio = voiceEntry.parentVoiceEntry.Arpeggio;
                    // TODO right now our arpeggio object has all arpeggio notes from arpeggios across all voices.
                    // see VoiceGenerator. Doesn't matter for Vexflow for now though
                    if (voiceEntry.notes && voiceEntry.notes.length > 1) {
                        const type: Vex.Flow.Stroke.Type = VexFlowConverter.StrokeTypeFromArpeggioType(arpeggio.type);
                        const stroke: Vex.Flow.Stroke = new Vex.Flow.Stroke(type, {
                            all_voices: this.rules.ArpeggiosGoAcrossVoices
                            // default: false. This causes arpeggios to always go across all voices, which is often unwanted.
                            // also, this can cause infinite height of stroke, see #546
                        });
                        //if (arpeggio.notes.length === vexFlowVoiceEntry.notes.length) { // different workaround for endless y bug
                        if (this.rules.RenderArpeggios) {
                            vexFlowVoiceEntry.vfStaveNote.addStroke(0, stroke);
                        }
                    } else {
                        log.debug(`[OSMD] arpeggio in measure ${this.MeasureNumber} could not be drawn.
                        voice entry had less than two notes, arpeggio is likely between voice entries, not currently supported in Vexflow.`);
                        // TODO: create new arpeggio with all the arpeggio's notes (arpeggio.notes), perhaps with GhostNotes in a new vfStaveNote. not easy.
                    }
                }

                this.vfVoices[voice.VoiceId].addTickable(vexFlowVoiceEntry.vfStaveNote);
            }
        }
        //this.createArticulations();
        //this.createOrnaments();
    }
}