/**
 *  LogarithmPlotter - 2D plotter software to make BODE plots, sequences and distribution functions.
 *  Copyright (C) 2021-2024  Ad5001
 * 
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  This program 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 General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

import { executeExpression, Expression } from "../mathlib.mjs"
import * as P from "../parameters.mjs"
import Objects from "../objects.mjs"
import Latex from "../math/latex.mjs"

import { API as Common, ExecutableObject } from "common.mjs"
import { API as HistoryAPI } from "../history/common.mjs"
import { CreateNewObject } from "../historylib.mjs"


export default class PhaseBode extends ExecutableObject {
    static type(){return 'Phase Bode'}
    static displayType(){return qsTr('Bode Phase')}
    static displayTypeMultiple(){return qsTr('Bode Phases')}
    static properties() {return {
        [QT_TRANSLATE_NOOP('prop','om_0')]:          new P.ObjectType('Point'),
        [QT_TRANSLATE_NOOP('prop','phase')]:         new P.Expression(),
        [QT_TRANSLATE_NOOP('prop','unit')]:          new P.Enum('°', 'deg', 'rad'),
        [QT_TRANSLATE_NOOP('prop','labelPosition')]: P.Enum.Position,
        [QT_TRANSLATE_NOOP('prop','labelX')]:        'number'
    }}
    
    constructor(name = null, visible = true, color = null, labelContent = 'name + value', 
                om_0 = '', phase = 90, unit = '°', labelPosition = 'above', labelX = 1) {
        if(name == null) name = Common.getNewName('φ')
        if(name === 'φ') name = 'φ₀' // φ is reserved for sum of BODE phases (Somme phases Bode).
        super(name, visible, color, labelContent)
        if(typeof phase == 'number' || typeof phase == 'string') phase = new Expression(phase.toString())
        this.phase = phase
        if(typeof om_0 == "string") {
            // Point name or create one
            om_0 = Objects.currentObjectsByName[om_0]
            if(om_0 == null) {
                // Create new point
                om_0 = Objects.createNewRegisteredObject('Point', [Common.getNewName('ω'), this.color, 'name'])
                om_0.labelPosition = this.phase.execute() >= 0 ? 'above' : 'below'
                HistoryAPI.history.addToHistory(new CreateNewObject(om_0.name, 'Point', om_0.export()))
                labelPosition = 'below'
            }
            om_0.requiredBy.push(this)
        }
        /** @type {Point} */
        this.om_0 = om_0
        this.unit = unit
        this.labelPosition = labelPosition
        this.labelX = labelX
    }
    
    export() {
        return [this.name, this.visible, this.color.toString(), this.labelContent, 
        this.om_0.name, this.phase.toEditableString(), this.unit, this.labelPosition, this.labelX]
    }
    
    getReadableString() {
        return `${this.name}: ${this.phase.toString(true)}${this.unit} at ${this.om_0.name} = ${this.om_0.x}`
    }
    
    getLatexString() {
        return `${Latex.variable(this.name)}: ${this.phase.latexMarkup}\\textsf{${this.unit} at }${Latex.variable(this.om_0.name)} = ${this.om_0.x.latexMarkup}`
    }
    
    execute(x=1) {
        if(typeof x == 'string') x = executeExpression(x)
        if(x < this.om_0.x) {
            return this.om_0.y.execute()
        } else {
            return this.om_0.y.execute() + this.phase.execute()
        }
    }
    
    simplify(x = 1) {
        let xval = x
        if(typeof x == 'string') xval = executeExpression(x)
        if(xval < this.om_0.x) {
            return this.om_0.y.toString()
        } else {
            let newExp = this.om_0.y.toEditableString() + ' + ' + this.phase.toEditableString()
            return (new Expression(newExp)).toString()
        }
    }
    
    canExecute(x = 1) {
        return true
    }
    
    draw(canvas) {
        let baseX = canvas.x2px(this.om_0.x.execute())
        let omy = this.om_0.y.execute()
        let augmt = this.phase.execute()
        let baseY = canvas.y2px(omy)
        let augmtY = canvas.y2px(omy+augmt)
        // Before change line.
        canvas.drawLine(0, baseY, Math.min(baseX, canvas.height), baseY)
        // Transition line.
        canvas.drawLine(baseX, baseY, baseX, augmtY)
        // After change line
        canvas.drawLine(Math.max(0, baseX), augmtY, canvas.width, augmtY)
        
        // Label
        this.drawLabel(canvas, this.labelPosition, canvas.x2px(this.labelX), canvas.y2px(this.execute(this.labelX)))
    }
    
    update() {
        if(Objects.currentObjects['Somme phases Bode'] !== undefined && Objects.currentObjects['Somme phases Bode'].length > 0) {
            Objects.currentObjects['Somme phases Bode'][0].recalculateCache()
        } else {
            Objects.createNewRegisteredObject('Somme phases Bode')
        }
    }
}