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

dotenv.config();

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

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

// Configuration
const GITEA_API_URL = process.env.GITEA_API_URL || "https://git.mworld.cloud/api/v1";
const GITEA_TOKEN = process.env.GITEA_TOKEN;
const GITEA_USERNAME = process.env.GITEA_USERNAME;

if (!GITEA_TOKEN || !GITEA_USERNAME) {
  throw new Error("Missing GITEA_TOKEN or GITEA_USERNAME");
}

// Helper to call Gitea API
async function callGitea(method: string, path: string, body?: any) {
  const headers: Record<string, string> = {
    Authorization: `token ${GITEA_TOKEN}`,
    "Content-Type": "application/json",
  };

  const response = await fetch(`${GITEA_API_URL}${path}`, {
    method,
    headers,
    body: body ? JSON.stringify(body) : undefined,
  });

  if (!response.ok && response.status !== 404) {
    const errorText = await response.text();
    throw new Error(`Gitea API Error ${response.status}: ${errorText}`);
  }

  return response;
}

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

    // 1. Sanitize Repo Name
    const sanitizedRepoName = repoName
      .toLowerCase()
      .trim()
      .replace(/\s+/g, "-")
      .replace(/[^\w-]/g, "");

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

    try {
      await job.updateProgress(10);

      let repoDetails: any;
      
      const checkRepo = await callGitea("GET", `/repos/${GITEA_USERNAME}/${sanitizedRepoName}`);

      if (checkRepo.status === 404) {
        console.log(`[Job ${job.id}] Repo not found, creating new repo: ${sanitizedRepoName}`);
        
        // Create Repo
        const createRes = await callGitea("POST", "/user/repos", {
          name: sanitizedRepoName,
          private: true,
          auto_init: true,
          description: `Generated by MWorld for chat ${chatId}`,
        });

        if (!createRes.ok) throw new Error("Failed to create repository");
        
        repoDetails = await createRes.json();

        await new Promise((r) => setTimeout(r, 2000));
      } else {
        repoDetails = await checkRepo.json();
      }

      const defaultBranch = repoDetails.default_branch || "main"; //

      await job.updateProgress(30);

      // 3. Prepare Batch File Operations
      const fileOperations = Object.entries(files).map(([path, content]) => ({
        operation: "upload", 
        path: path,
        content: Buffer.from(content as string).toString("base64"),
      }));

      await job.updateProgress(60);

      // 4. Commit and Push (Atomic Batch Operation)
      const commitRes = await callGitea(
        "POST",
        `/repos/${GITEA_USERNAME}/${sanitizedRepoName}/contents`,
        {
          branch: defaultBranch,
          message: `Deploy updates from MWorld ⚡️ (Chat ${chatId})`,
          files: fileOperations,
          author: {
            name: "MWorld Bot",
            email: "bot@mworld.com",
          },
        }
      );

      if (!commitRes.ok) {
        throw new Error(`Failed to commit files: ${await commitRes.text()}`);
      }

      await job.updateProgress(100);

      const repoUrl = `${GITEA_API_URL.replace("/api/v1", "")}/${GITEA_USERNAME}/${sanitizedRepoName}`;
      console.log(`[Job ${job.id}] Deployment Complete! 🚀 URL: ${repoUrl}`);

      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,
    },
  }
);

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