import { getAsciiArt } from "../util/asciiArt.ts";
import { toCase } from "util/caseManagement.ts";
import { ArgParser } from "./argParser.ts";
import { colorize } from "./colorize.ts";
import { selectMenuInteractive } from "./selectMenu.ts";
import { TerminalBlock, TerminalLayout } from "./TerminalLayout.ts";

export class PdfToolsCli {
  private tools: Map<string, ITool> = new Map();
  private terminalLayout = new TerminalLayout();

  private args = ArgParser.parse(Deno.args);

  async importTools(tools?: string) {
    tools = tools?.replace(/\/$/, "").replace(/^\.?\//, "") || "tools";
    for (const toolfile of Deno.readDirSync(tools)) {
      if (toolfile.isFile) {
        const tool = await import(
          Deno.cwd() + "/" + tools + "/" + toolfile.name
        );
        if (tool.default) {
          this.tools.set(
            toCase(toolfile.name.replace(".ts", ""), "title"),
            tool.default,
          );
        }
      }
    }
  }

  private async banana() {
    const asciiArt = await getAsciiArt("banana");
    console.log(colorize(asciiArt, "yellow"));
  }

  private help() {
    console.log("BearMetal PDF CLI");
  }

  public async run() {
    try {
      const lines: string[] = [];
      for (const t of ["bearmetal:porple", "pdftools:cyan"]) {
        const [name, color] = t.split(":");
        const asciiArt = await getAsciiArt(name);
        lines.push(...colorize(asciiArt, color).split("\n"));
      }
      const titleBlock = new TerminalBlock();
      this.terminalLayout.register("title", titleBlock);
      const bodyBlock = new TerminalBlock();
      this.terminalLayout.register("body", bodyBlock);
      titleBlock.setFixedHeight(lines.length);
      titleBlock.setLines(lines);
      if (Deno.args.length === 0) {
        // console.log(
        //   colorize("No tool specified. Importing all tools...", "gray"),
        // );
        await this.importTools();
      }
      this.toolMenu();
    } finally {
      this.terminalLayout.clearAll();
    }
  }

  private async toolMenu() {
    const tools = this.tools.keys().toArray();
    const bodyBlock = this.terminalLayout.getBlock("body");
    const selected = await selectMenuInteractive("Choose a tool", tools, {
      terminalBlock: bodyBlock,
    });
    bodyBlock.clear();
    if (!selected) return;
    await this.runTool(selected);
    this.toolMenu();
  }

  private async runTool(toolName: string) {
    const tool = this.tools.get(toolName);
    if (tool) {
      await tool.run();
      await tool.done?.();
    }
  }
}