import color from "picocolors";
import { createStepUI } from "../../utils/stepui.js";
import { title, getSteps } from "./config.js";
import { stopKeypress, waitForKey, initKeypress } from "../../keyboard.js";
import { record } from "../../stats.js";
import { processImage } from "./service.js";
import path from "path";

const OPERATIONS = [
  { id: "compress", name: "压缩", stepIndex: 1, folder: "compressed" },
  { id: "resize", name: "生成多尺寸", stepIndex: 2, folder: "resized" },
  { id: "background", name: "统一背景", stepIndex: 3, folder: "background" },
  { id: "crop", name: "裁剪补边", stepIndex: 4, folder: "cropped" }
];

const run = async () => {
  try {
    // 强制清理并重新初始化键盘
    stopKeypress();
    await new Promise(resolve => setTimeout(resolve, 100));

    const steps = getSteps();
    const ui = createStepUI({
      title,
      getSteps: () => steps,
      validate: (results) => {
        // 验证是否有文件选择且至少有一个操作未跳过
        const files = results[0] || [];
        const hasOperation = OPERATIONS.some(op => results[op.stepIndex] !== "skip");
        return files.length > 0 && hasOperation;
      }
    });

    const result = await ui.runInteractive();

    if (!result) {
      stopKeypress();
      return "back";
    }

    const files = result.results[0] || [];
    const selectedOp = OPERATIONS.find(op => result.results[op.stepIndex] !== "skip");

    stopKeypress();

    const params = buildProcessParams(selectedOp.id, result.results[selectedOp.stepIndex]);

    ui.showSummary([
      "源文件: " + files.join(", "),
      "操作: " + selectedOp.name,
      getParamLabel(selectedOp.id, params)
    ]);

    const total = files.length;
    let success = 0;
    const failed = [];

    console.log(color.cyan(`开始处理 ${total} 个文件...\\n`));

    for (let i = 0; i < files.length; i++) {
      const file = files[i];
      const progress = `[${i + 1}/${total}]`;
      console.log(color.dim(`${progress} 处理中: ${file}`));

      try {
        const outputs = await processImage(file, selectedOp.id, params);
        success++;
        record("image_operation", selectedOp.id);

        const outputNames = Array.isArray(outputs)
          ? outputs.map(o => path.relative(process.cwd(), o)).join(", ")
          : path.relative(process.cwd(), outputs);
        console.log(color.green(`${progress} ✓ ${file} → ${outputNames}`));
      } catch (err) {
        failed.push({ file, reason: err?.message || String(err) });
        console.log(color.red(`${progress} ✖ 失败: ${file}`));
        console.log(color.dim("   " + String(err?.message || err)));
      }
    }

    console.log("\\n" + color.bgGreen(color.black(" 处理完成 ")));
    console.log(color.green(`成功: ${success} 个`));
    if (failed.length) console.log(color.yellow(`失败: ${failed.length} 个`));
    console.log(color.cyan(`输出目录: ${selectedOp.folder}/`));

    await waitForKey(color.dim("按 Esc 返回"), key => key?.name === "escape" || (key?.ctrl && key?.name === "c"));
    stopKeypress();
    return "back";
  } catch (err) {
    stopKeypress();
    console.error(color.red("发生错误:"), err);
    return "back";
  }
};

function getParamLabel(operation, params) {
  switch (operation) {
    case "compress":
      return `压缩质量: ${params.quality}%`;
    case "resize":
      const presets = {
        responsive: "响应式 (800/400/200)",
        thumbnail: "缩略图 (300/150/75)",
        large: "大图 (1920/1280/640)"
      };
      return `尺寸预设: ${presets[params.sizes] || "响应式"}`;
    case "background":
      return `背景颜色: ${params.bgColor === 0xFFFFFFFF ? "白色" : "其他"}`;
    case "crop":
      return `画布尺寸: ${params.width}×${params.height}`;
    default:
      return "";
  }
}

function buildProcessParams(operation, paramValue) {
  switch (operation) {
    case "compress":
      return { quality: paramValue };
    case "resize":
      const sizePresets = {
        responsive: [{ width: 800 }, { width: 400 }, { width: 200 }],
        thumbnail: [{ width: 300 }, { width: 150 }, { width: 75 }],
        large: [{ width: 1920 }, { width: 1280 }, { width: 640 }]
      };
      return { sizes: sizePresets[paramValue] || sizePresets.responsive };
    case "background":
      return { bgColor: paramValue };
    case "crop":
      const [width, height] = paramValue.split("x").map(Number);
      return { width, height, bgColor: 0xFFFFFFFF };
    default:
      return null;
  }
}

export default {
  id: "image",
  name: "图片批量处理",
  desc: "裁剪/缩放/转换",
  run,
};