import mermaid from 'https://unpkg.com/mermaid@9.2.2/dist/mermaid.esm.min.mjs';
import { Actor } from './actor.js';
import { Action } from './action.js';
import { debounce, hexToRGB } from '../util.js';

class MermaidDiagram {
  constructor(box, logBox) {
    this.box = box;
    this.container = this.box.addBox('Container');
    this.element = this.box.addBox('Element');
    this.renderBox = this.box.addBox('Render');
    this.box.addBox('Spacer').setInnerHTML(' ');
    this.logBox = logBox;
    this.inSection = 0;
  }

  async log(msg, render = true) {
    this.logBox.addBox().setInnerHTML(msg).monospace();
    if (render) {
      await this.render();
    }
    return this;
  }

  async render() {
    const render = async () => {
      let innerText = this.logBox.getInnerText();
      for (let i = 0; i < this.inSection; i++) {
        innerText += '\nend';
      }
      const graph = await mermaid.mermaidAPI.render(
        this.element.getId(),
        innerText,
      );
      this.renderBox.setInnerHTML(graph);
    };
    await debounce(render, 100);
  }
}

export class Scene {
  constructor(name, rootBox) {
    this.name = name;
    this.box = rootBox.addBox(name);
    this.titleBox = this.box.addBox('Title').setInnerHTML(name);
    this.box.addBox('Spacer').setInnerHTML('&nbsp;');
    this.topSection = this.box.addBox('Top section').flex();
    this.displayValuesBox = this.topSection.addBox('Values');
    this.box.addBox('Spacer').setInnerHTML('&nbsp;');
    this.actors = new Set();

    mermaid.mermaidAPI.initialize({
      startOnLoad: false,
      theme: 'base',
      themeVariables: {
        darkMode: true,
        primaryColor: '#2a5b6c',
        primaryTextColor: '#b6b6b6',
        // lineColor: '#349cbd',
        lineColor: '#57747d',
        signalColor: '#57747d',
        // signalColor: '#349cbd',
        noteBkgColor: '#516f77',
        noteTextColor: '#cecece',
        activationBkgColor: '#1d3f49',
        activationBorderColor: '#569595',
      },
    });
  }

  withSequenceDiagram() {
    const box = this.box.addBox('Sequence diagram');
    this.box.addBox('Spacer').setInnerHTML('&nbsp;');
    const logBox = this.box.addBox('Sequence diagram text');
    this.sequence = new MermaidDiagram(box, logBox);
    this.sequence.log('sequenceDiagram', false);
    return this;
  }

  withFlowchart(direction = 'BT') {
    const box = this.topSection.addBox('Flowchart');
    this.box.addBox('Spacer').setInnerHTML('&nbsp;');
    const logBox = this.box.addBox('Flowchart text');
    this.flowchart = new MermaidDiagram(box, logBox);
    this.flowchart.log(`graph ${direction}`, false);
    return this;
  }

  async addActor(name) {
    const actor = new Actor(name, this);
    if (this.sequence) {
      await this.scene.sequence.log(`participant ${name}`);
    }
    return actor;
  }

  registerActor(actor) {
    this.actors.add(actor);
  }

  findActor(fn) {
    return Array.from(this.actors.values()).find(fn);
  }

  addAction(name) {
    const action = new Action(name, this);
    return action;
  }

  addDisplayValue(name) {
    const dv = this.displayValuesBox.addDisplayValue(name);
    return dv;
  }

  async deactivateAll() {
    for (const actor of this.actors.values()) {
      while (actor.active) {
        await actor.deactivate();
      }
    }
  }

  async startSection(color = '#08252c') {
    const { r, g, b } = hexToRGB(color);
    this.sequence.inSection++;
    this.sequence.log(`rect rgb(${r}, ${g}, ${b})`, false);
  }

  async endSection() {
    this.sequence.inSection--;
    this.sequence.log('end');
  }
}