import { ipcMain, WebContents } from "electron";
import { spawn, ChildProcess, exec } from "node:child_process";
import { promisify } from "node:util";
import pino from "pino";

import { ChannelPayload, InstalledAppInfo } from "../../typedefinition";

const logger = pino({ name: "install-manager" });

type InstallTask = {
  id: number;
  pkgname: string;
  execCommand: string;
  execParams: string[];
  process: ChildProcess | null;
  webContents: WebContents | null;
};

const SHELL_CALLER_PATH = "/opt/apm-store/extras/shell-caller.sh";

export const tasks = new Map<number, InstallTask>();

let idle = true; // Indicates if the installation manager is idle

const checkSuperUserCommand = async (): Promise<string> => {
  let superUserCmd = "";
  const execAsync = promisify(exec);
  if (process.getuid && process.getuid() !== 0) {
    const { stdout, stderr } = await execAsync("which /usr/bin/pkexec");
    if (stderr) {
      logger.error("没有找到 pkexec 命令");
      return;
    }
    logger.info(`找到提升权限命令: ${stdout.trim()}`);
    superUserCmd = stdout.trim();

    if (superUserCmd.length === 0) {
      logger.error("没有找到提升权限的命令 pkexec!");
    }
  }
  return superUserCmd;
};

const runCommandCapture = async (execCommand: string, execParams: string[]) => {
  return await new Promise<{ code: number; stdout: string; stderr: string }>(
    (resolve) => {
      const child = spawn(execCommand, execParams, {
        shell: true,
        env: process.env,
      });

      let stdout = "";
      let stderr = "";

      child.stdout?.on("data", (data) => {
        stdout += data.toString();
      });

      child.stderr?.on("data", (data) => {
        stderr += data.toString();
      });

      child.on("error", (err) => {
        resolve({ code: -1, stdout, stderr: err.message });
      });

      child.on("close", (code) => {
        resolve({ code: typeof code === "number" ? code : -1, stdout, stderr });
      });
    },
  );
};

const parseInstalledList = (output: string) => {
  const apps: Array<InstalledAppInfo> = [];
  const lines = output.split("\n");
  for (const line of lines) {
    const trimmed = line.trim();
    if (!trimmed) continue;
    if (trimmed.startsWith("Listing")) continue;
    if (trimmed.startsWith("[INFO]")) continue;

    const match = trimmed.match(/^(\S+)\/\S+,\S+\s+(\S+)\s+(\S+)\s+\[(.+)\]$/);
    if (!match) continue;
    apps.push({
      pkgname: match[1],
      version: match[2],
      arch: match[3],
      flags: match[4],
      raw: trimmed,
    });
  }
  return apps;
};

const parseUpgradableList = (output: string) => {
  const apps: Array<{
    pkgname: string;
    newVersion: string;
    currentVersion: string;
    raw: string;
  }> = [];
  const lines = output.split("\n");
  for (const line of lines) {
    const trimmed = line.trim();
    if (!trimmed) continue;
    if (trimmed.startsWith("Listing")) continue;
    if (trimmed.startsWith("[INFO]")) continue;
    if (trimmed.includes("=") && !trimmed.includes("/")) continue;

    if (!trimmed.includes("/")) continue;

    const tokens = trimmed.split(/\s+/);
    if (tokens.length < 2) continue;
    const pkgToken = tokens[0];
    const pkgname = pkgToken.split("/")[0];
    const newVersion = tokens[1] || "";
    const currentMatch = trimmed.match(
      /\[(?:upgradable from|from):\s*([^\]\s]+)\]/i,
    );
    const currentToken = tokens[5] || "";
    const currentVersion =
      currentMatch?.[1] || currentToken.replace("[", "").replace("]", "");

    if (!pkgname) continue;
    apps.push({ pkgname, newVersion, currentVersion, raw: trimmed });
  }
  return apps;
};

// Listen for download requests from renderer process
ipcMain.on("queue-install", async (event, download_json) => {
  const download = JSON.parse(download_json);
  const { id, pkgname } = download || {};

  if (!id || !pkgname) {
    logger.warn("passed arguments missing id or pkgname");
    return;
  }

  logger.info(`收到下载任务: ${id},  软件包名称: ${pkgname}`);

  // 避免重复添加同一任务，但允许重试下载
  if (tasks.has(id) && !download.retry) {
    tasks.get(id)?.webContents.send("install-log", {
      id,
      time: Date.now(),
      message: `任务id： ${id} 已在列表中，忽略重复添加`,
    });
    tasks.get(id)?.webContents.send("install-complete", {
      id: id,
      success: false,
      time: Date.now(),
      exitCode: -1,
      message: `{"message":"任务id： ${id} 已在列表中，忽略重复添加","stdout":"","stderr":""}`,
    });
    return;
  }

  const webContents = event.sender;

  // 开始组装安装命令
  const superUserCmd = await checkSuperUserCommand();
  let execCommand = "";
  const execParams = [];
  if (superUserCmd.length > 0) {
    execCommand = superUserCmd;
    execParams.push(SHELL_CALLER_PATH);
  } else {
    execCommand = SHELL_CALLER_PATH;
  }
  execParams.push("apm", "install", "-y", pkgname);

  const task: InstallTask = {
    id,
    pkgname,
    execCommand,
    execParams,
    process: null,
    webContents,
  };
  tasks.set(id, task);
  if (idle) processNextInQueue(0);
});

function processNextInQueue(index: number) {
  if (!idle) return;

  idle = false;
  const task = Array.from(tasks.values())[index];
  const webContents = task.webContents;
  let stdoutData = "";
  let stderrData = "";

  webContents.send("install-status", {
    id: task.id,
    time: Date.now(),
    message: "installing",
  });
  webContents.send("install-log", {
    id: task.id,
    time: Date.now(),
    message: `开始执行: ${task.execCommand} ${task.execParams.join(" ")}`,
  });
  logger.info(`启动安装命令: ${task.execCommand} ${task.execParams.join(" ")}`);

  const child = spawn(task.execCommand, task.execParams, {
    shell: true,
    env: process.env,
  });
  task.process = child;

  // 监听 stdout
  child.stdout.on("data", (data) => {
    stdoutData += data.toString();
    webContents.send("install-log", {
      id: task.id,
      time: Date.now(),
      message: data.toString(),
    });
  });

  // 监听 stderr
  child.stderr.on("data", (data) => {
    stderrData += data.toString();
    webContents.send("install-log", {
      id: task.id,
      time: Date.now(),
      message: data.toString(),
    });
  });
  child.on("close", (code) => {
    const success = code === 0;
    // 拼接json消息
    const messageJSONObj = {
      message: success ? "安装完成" : `安装失败，退出码 ${code}`,
      stdout: stdoutData,
      stderr: stderrData,
    };

    if (success) {
      logger.info(messageJSONObj);
    } else {
      logger.error(messageJSONObj);
    }

    webContents.send("install-complete", {
      id: task.id,
      success: success,
      time: Date.now(),
      exitCode: code,
      message: JSON.stringify(messageJSONObj),
    });
    tasks.delete(task.id);
    idle = true;
    if (tasks.size > 0) processNextInQueue(0);
  });
}

ipcMain.handle("check-installed", async (_event, pkgname: string) => {
  if (!pkgname) {
    logger.warn("check-installed missing pkgname");
    return false;
  }
  let isInstalled = false;

  logger.info(`检查应用是否已安装: ${pkgname}`);

  const child = spawn(
    SHELL_CALLER_PATH,
    ["apm", "list", "--installed", pkgname],
    {
      shell: true,
      env: process.env,
    },
  );

  let output = "";

  child.stdout.on("data", (data) => {
    output += data.toString();
  });

  await new Promise<void>((resolve) => {
    child.on("close", (code) => {
      if (code === 0 && output.includes(pkgname)) {
        isInstalled = true;
        logger.info(`应用已安装: ${pkgname}`);
      } else {
        logger.info(`应用未安装: ${pkgname}`);
      }
      resolve();
    });
  });
  return isInstalled;
});

ipcMain.on("remove-installed", async (_event, pkgname: string) => {
  const webContents = _event.sender;
  if (!pkgname) {
    logger.warn("remove-installed missing pkgname");
    return;
  }
  logger.info(`卸载已安装应用: ${pkgname}`);

  const superUserCmd = await checkSuperUserCommand();
  let execCommand = "";
  const execParams = [];
  if (superUserCmd.length > 0) {
    execCommand = superUserCmd;
    execParams.push(SHELL_CALLER_PATH);
  } else {
    execCommand = SHELL_CALLER_PATH;
  }
  const child = spawn(
    execCommand,
    [...execParams, "apm", "remove", "-y", pkgname],
    {
      shell: true,
      env: process.env,
    },
  );
  let output = "";

  child.stdout.on("data", (data) => {
    const chunk = data.toString();
    output += chunk;
    webContents.send("remove-progress", chunk);
  });

  child.on("close", (code) => {
    const success = code === 0;
    // 拼接json消息
    const messageJSONObj = {
      message: success ? "卸载完成" : `卸载失败，退出码 ${code}`,
      stdout: output,
      stderr: "",
    };

    if (success) {
      logger.info(messageJSONObj);
    } else {
      logger.error(messageJSONObj);
    }

    webContents.send("remove-complete", {
      id: 0,
      success: success,
      time: Date.now(),
      exitCode: code,
      message: JSON.stringify(messageJSONObj),
    } satisfies ChannelPayload);
  });
});

ipcMain.handle("list-upgradable", async () => {
  const { code, stdout, stderr } = await runCommandCapture(SHELL_CALLER_PATH, [
    "apm",
    "list",
    "--upgradable",
  ]);
  if (code !== 0) {
    logger.error(`list-upgradable failed: ${stderr || stdout}`);
    return {
      success: false,
      message: stderr || stdout || `list-upgradable failed with code ${code}`,
      apps: [],
    };
  }

  const apps = parseUpgradableList(stdout);
  return { success: true, apps };
});

ipcMain.handle("list-installed", async () => {
  const superUserCmd = await checkSuperUserCommand();
  const execCommand =
    superUserCmd.length > 0 ? superUserCmd : SHELL_CALLER_PATH;
  const execParams =
    superUserCmd.length > 0
      ? [SHELL_CALLER_PATH, "apm", "list", "--installed"]
      : ["apm", "list", "--installed"];

  const { code, stdout, stderr } = await runCommandCapture(
    execCommand,
    execParams,
  );
  if (code !== 0) {
    logger.error(`list-installed failed: ${stderr || stdout}`);
    return {
      success: false,
      message: stderr || stdout || `list-installed failed with code ${code}`,
      apps: [],
    };
  }

  const apps = parseInstalledList(stdout);
  return { success: true, apps };
});

ipcMain.handle("uninstall-installed", async (_event, pkgname: string) => {
  if (!pkgname) {
    logger.warn("uninstall-installed missing pkgname");
    return { success: false, message: "missing pkgname" };
  }

  const superUserCmd = await checkSuperUserCommand();
  const execCommand =
    superUserCmd.length > 0 ? superUserCmd : SHELL_CALLER_PATH;
  const execParams =
    superUserCmd.length > 0
      ? [SHELL_CALLER_PATH, "apm", "remove", "-y", pkgname]
      : ["apm", "remove", "-y", pkgname];

  const { code, stdout, stderr } = await runCommandCapture(
    execCommand,
    execParams,
  );
  const success = code === 0;

  if (success) {
    logger.info(`卸载完成: ${pkgname}`);
  } else {
    logger.error(`卸载失败: ${pkgname} ${stderr || stdout}`);
  }

  return {
    success,
    message: success
      ? "卸载完成"
      : stderr || stdout || `卸载失败，退出码 ${code}`,
  };
});

ipcMain.handle("launch-app", async (_event, pkgname: string) => {
  if (!pkgname) {
    logger.warn("No pkgname provided for launch-app");
  }

  const execCommand = "/opt/apm-store/extras/host-spawn";
  const execParams = ["/opt/apm-store/extras/apm-launcher", "launch", pkgname];

  logger.info(
    `Launching app: ${pkgname} with command: ${execCommand} ${execParams.join(" ")}`,
  );

  spawn(execCommand, execParams, {
    shell: false,
    env: process.env,
    detached: true,
    stdio: "ignore",
  }).unref();
});