import { Octokit } from "@octokit/rest";
import { Job, Worker } from "bullmq";
import dotenv from "dotenv";
import { redisConfig } from "./redis.js";

dotenv.config();

console.log("👷 Deploy Worker Started...");

export interface DeployJobData {
  repoName: string;
  chatId: string;
  files: Record<string, string>;
}

const worker = new Worker<DeployJobData>(
  "github-deployments",
  async (job: Job) => {
    const {
      repoName,
      chatId,
      files,
    } = job.data;

    // 1. Sanitize Repo Name (e.g. "Hono Vite Health Check" -> "hono-vite-health-check")
    const sanitizedRepoName = repoName
      .toLowerCase()
      .trim()
      .replace(/\s+/g, "-")
      .replace(/[^\w-]/g, "");

    console.log(
      `[Job ${job.id}] Processing deployment for ${sanitizedRepoName} (Chat: ${chatId})...`
    );

    // 2. Auth
    const token = process.env.GITHUB_TOKEN;
    const username = process.env.GITHUB_USERNAME;

    if (!token || !username) {
      throw new Error("Missing GitHub Token or Username. Cannot deploy.");
    }

    // Initialize GitHub Client
    const octokit = new Octokit({ auth: token });

    try {
      await job.updateProgress(10);

      // 3. Ensure Repo Exists or Create it
      let latestCommitSha: string;

      try {
        // Check if repo exists
        await octokit.repos.get({ owner: username, repo: sanitizedRepoName });

        // If exists, get HEAD commit
        const ref = await octokit.git.getRef({
          owner: username,
          repo: sanitizedRepoName,
          ref: "heads/main",
        });
        latestCommitSha = ref.data.object.sha;
      } catch (e: any) {
        if (e.status === 404) {
          console.log(
            `[Job ${job.id}] Repo not found, creating new repo: ${sanitizedRepoName}`
          );

          // Create Repo
          await octokit.repos.createForAuthenticatedUser({
            name: sanitizedRepoName,
            private: true, // Set to true if you want private repos
            auto_init: true, // Creates an initial commit (README) so we have a HEAD
            description: `Generated by MWorld for chat ${chatId}`,
          });

          // Wait a brief moment for GitHub propagation
          await new Promise((r) => setTimeout(r, 2000));

          // Get the initial commit SHA
          const ref = await octokit.git.getRef({
            owner: username,
            repo: sanitizedRepoName,
            ref: "heads/main",
          });
          latestCommitSha = ref.data.object.sha;
        } else {
          throw e;
        }
      }

      await job.updateProgress(30);

      // 4. Create Tree (Blobs)
      // The API expects an array of file objects.
      const treeData = Object.entries(files).map(([path, content]) => ({
        path, // e.g., "src/main.jsx" or "package.json"
        mode: "100644" as const,
        type: "blob" as const,
        content: content as string, // The actual string content from Redis
      }));

      // Create a tree based on the latest commit
      const { data: tree } = await octokit.git.createTree({
        owner: username,
        repo: sanitizedRepoName,
        base_tree: latestCommitSha,
        tree: treeData,
      });

      await job.updateProgress(60);

      // 5. Create Commit
      const { data: commit } = await octokit.git.createCommit({
        owner: username,
        repo: sanitizedRepoName,
        message: `Deploy updates from MWorld ⚡️ (Chat ${chatId})`,
        tree: tree.sha,
        parents: [latestCommitSha],
      });

      await job.updateProgress(80);

      // 6. Push (Update Reference)
      await octokit.git.updateRef({
        owner: username,
        repo: sanitizedRepoName,
        ref: "heads/main",
        sha: commit.sha,
      });

      await job.updateProgress(100);

      const repoUrl = `https://github.com/${username}/${sanitizedRepoName}`;
      console.log(`[Job ${job.id}] Deployment Complete! 🚀 URL: ${repoUrl}`);

      // TODO: USE SUPABASE TO UPDATE THE REPO URL

      return { success: true, url: repoUrl };
    } catch (error: any) {
      console.error(`[Job ${job.id}] Failed:`, error.message);
      throw error;
    }
  },
  {
    connection: redisConfig,
    concurrency: 5,
    limiter: {
      max: 10,
      duration: 1000, // Rate limit protection for GitHub API
    },
  }
);

// Listener for errors
worker.on("failed", (job, err) => {
  console.error(`[Job ${job?.id}] Failed with error ${err.message}`);
});