/**
 * This file is part of Satie music engraver <https://github.com/jnetterf/satie>.
 * Copyright (C) Joshua Netterfield <joshua.ca> 2015 - present.
 * 
 * Satie is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * Satie is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with Satie.  If not, see <http://www.gnu.org/licenses/>.
 */

import {createFactory, ReactElement} from "react";
import {renderToStaticMarkup} from "react-dom/server";

import {ScoreHeader, Print, Grouping, FiguredBass, Attributes, Sound, Direction,
        Harmony, Barline} from "musicxml-interfaces";
import {IAny} from "musicxml-interfaces/operations";
import {find} from "lodash";

import ProxyExports from "./implProxy_proxyModel";
import SpacerExports from "./implSpacer_spacerModel";
import VisualCursorExports from "./implVisualCursor_visualCursorModel";

import {IFactory} from "./private_factory";

import {IAttributesSnapshot} from "./private_attributesSnapshot";
import {ILayoutOptions} from "./private_layoutOptions";
import {IChord} from "./private_chordUtil";

import validate from "./engine_processors_validate";
import layoutSong, {ILinePlacementHint} from "./engine_processors_layout";

import PageView from "./implPage_pageView";

import {IMeasure} from "./document_measure";
import {IModel} from "./document_model";
import Type from "./document_types";

const $PageView = createFactory(PageView);

export {ISegment, IMeasurePart, IMeasure, getMeasureSegments, reduceToShortestInSegments} from "./document_measure";
export {IModel, generateModelKey, ILayout, detach} from "./document_model";
export {IMouseEvent, IProps, IPatchSpec, specIsRaw, specIsDocBuilder, specIsPartBuilder, ISong,
    ISongClass} from "./document_song";
export {default as Type} from "./document_types";

import {IMeasureLayout} from "./private_measureLayout";

export interface ICleanlinessTracking {
    measures: {[measure: string]: {
        /** x is cleared whenever rerendering a dirty measure not in preview mode */
        x: {
            [part: string]: {
                [voice: number]: {
                    voiceX: number[];
                    staffX: {[staff: number]: number[]};
                };
            }
        };
        clean: IMeasureLayout;
        layout: IMeasureLayout;
    }};
    lines: number[][];
    linePlacementHints: ReadonlyArray<ILinePlacementHint>;
}

/**
 * Models a document in a certain state. Songs wrap documents to support change tracking.
 * Songs should not be mutated by user code.
 */
export class Document {
    error: Error;
    header: ScoreHeader;
    measures: IMeasure[];
    parts: string[];
    _visualCursor: any;

    private _factory: IFactory;

    modelHasType(model: IModel, modelType: Type.Chord): model is (IChord & IModel);
    modelHasType(model: IModel, modelType: Type.Print): model is (Print & IModel);
    modelHasType(model: IModel, modelType: Type.Grouping): model is (Grouping & IModel);
    modelHasType(model: IModel, modelType: Type.FiguredBass): model is (FiguredBass & IModel);
    modelHasType(model: IModel, modelType: Type.Attributes): model is (Attributes & IModel & {_snapshot: IAttributesSnapshot});
    modelHasType(model: IModel, modelType: Type.Sound): model is (Sound & IModel);
    modelHasType(model: IModel, modelType: Type.Direction): model is (Direction & IModel);
    modelHasType(model: IModel, modelType: Type.Harmony): model is (Harmony & IModel);
    modelHasType(model: IModel, modelType: Type.Proxy): model is ProxyExports.IProxyModel;
    modelHasType(model: IModel, modelType: Type.Spacer): model is SpacerExports.ISpacerModel;
    modelHasType(model: IModel, modelType: Type.VisualCursor):
        model is VisualCursorExports.IVisualCursorModel;
    modelHasType(model: IModel, modelType: Type.Barline): model is (Barline & IModel);
    modelHasType(model: IModel, ...modelTypes: Type[]): boolean;
    modelHasType(model: IModel, ...modelTypes: Type[]): boolean {
        return this._factory.modelHasType(model, ...modelTypes);
    }

    search(models: IModel[], idx: number, modelType: Type.Chord): (IChord & IModel)[];
    search(models: IModel[], idx: number, modelType: Type.Print): (Print & IModel)[];
    search(models: IModel[], idx: number, modelType: Type.Grouping): (Grouping & IModel)[];
    search(models: IModel[], idx: number, modelType: Type.FiguredBass): (FiguredBass & IModel)[];
    search(models: IModel[], idx: number, modelType: Type.Attributes): (Attributes & IModel)[];
    search(models: IModel[], idx: number, modelType: Type.Sound): (Sound & IModel)[];
    search(models: IModel[], idx: number, modelType: Type.Direction): (Direction & IModel)[];
    search(models: IModel[], idx: number, modelType: Type.Harmony): (Harmony & IModel)[];
    search(models: IModel[], idx: number, modelType: Type.Proxy): ProxyExports.IProxyModel[];
    search(models: IModel[], idx: number, modelType: Type.Spacer): SpacerExports.ISpacerModel[];
    search(models: IModel[], idx: number, modelType: Type.VisualCursor):
        VisualCursorExports.IVisualCursorModel[];
    search(models: IModel[], idx: number, ...types: Type[]): IModel[];
    search(models: IModel[], idx: number, ...types: Type[]): IModel[] {
        return this._factory.search(models, idx, ...types);
    }

    getPrint(startMeasure: number): Print {
        let firstMeasure = this.measures[startMeasure];
        if (!firstMeasure) {
            throw new Error("No such measure " + startMeasure);
        }
        let partWithPrint = find(firstMeasure.parts, part => !!part.staves[1] &&
                this.search(part.staves[1], 0, Type.Print).length);

        if (partWithPrint) {
            return this.search(partWithPrint.staves[1], 0, Type.Print)[0]._snapshot;
        }

        throw new Error("Part does not contain a Print element at division 0. Is it validated?");
    }

    renderToStaticMarkup(startMeasure: number): string {
        const core = renderToStaticMarkup(
            this.__getPage(startMeasure, false, "svg-export", null, false));

        return `<?xml version="1.0" encoding="UTF-8" standalone="no"?>${
            core.replace("<svg", "<svg xmlns=\"http://www.w3.org/2000/svg\"")
                .replace(/class="tn_"/g, "font-family='Alegreya'")
                .replace(/class="mmn_"/g, "font-family='Alegreya' " +
                            "font-style='italic' stroke='#7a7a7a'")
                .replace(/class="bn_"/g, "font-family='Alegreya' " +
                        "font-style='italic' text-anchor='end' stroke='#7a7a7a'")
                .replace(/<noscript><\/noscript>/g, "")}`;
    }

    /**
     * INTERNAL. Renders a page. Instead, use renderToStaticMarkup() or the
     * functions provided in Song.
     *
     * Invariant: document must be validated.
     */
    __getPage(startMeasure: number, preview: boolean,
        renderTarget?: "svg-web" | "svg-export", pageClassName?: string, singleLineMode?: boolean,
        fixedMeasureWidth?: number,
        onOperationsAppended?: (ops: IAny[]) => void,
        ref?: (svg: SVGSVGElement) => void,
        onPageHeightChanged?: (height: number) => void): ReactElement<any> {

        let opts: ILayoutOptions = {
            document: this,
            attributes: {},
            debug: true,
            header: this.header,
            lineCount: NaN, // YYY
            lineIndex: NaN, // YYY
            measures: this.measures,
            modelFactory: this._factory,
            postprocessors: this._factory.postprocessors,
            preprocessors: [],
            print: this.getPrint(startMeasure),
            preview,
            singleLineMode,
            fixedMeasureWidth,
            fixup: onOperationsAppended ? (segment, patch) => {
                onOperationsAppended(patch);
            } : null,
        };

        validate(opts);
        // Print snapshot may have been changed.
        opts.print = this.getPrint(startMeasure);
        const lineLayouts = layoutSong(opts);

        return $PageView({
            className: pageClassName,
            lineLayouts: lineLayouts,
            print: opts.print,
            renderTarget: renderTarget,
            scoreHeader: this.header,
            singleLineMode,
            svgRef: ref,
            onPageHeightChanged: onPageHeightChanged,
        });
    }

    constructor(header: ScoreHeader, measures: IMeasure[], parts: string[],
            internalFactory: IFactory, error?: Error) {

        if (error) {
            this.error = error;
            return;
        };
        this.header = header;
        this.measures = measures;
        this._factory = internalFactory;
    }

    cleanlinessTracking: ICleanlinessTracking = {
        measures: {},
        lines: [],
        linePlacementHints: null,
    };
}