import { json } from "@remix-run/node";
import type { ActionFunctionArgs } from "@remix-run/node";
import { githubApp } from "~/lib/github-app.server";
import { hugexService } from "~/lib/hugex-service.server";
import type { HugExJobCreationParams } from "~/lib/hugex-service.server";

export async function action({ request }: ActionFunctionArgs) {
  if (request.method !== "POST") {
    return json({ error: "Method not allowed" }, { status: 405 });
  }

  let payload: string;
  let eventData: any;

  try {
    payload = await request.text();
    const signature = request.headers.get("x-hub-signature-256") || "";
    const event = request.headers.get("x-github-event") || "";
    const delivery = request.headers.get("x-github-delivery") || "";

    console.log(`📥 Received GitHub webhook: ${event} (${delivery})`);

    // // Verify webhook signature
    // if (!githubApp.verifyWebhookSignature(payload, signature)) {
    //   console.error("Invalid webhook signature");
    //   return json({ error: "Invalid signature" }, { status: 401 });
    // }

    try {
      eventData = JSON.parse(payload);
    } catch (parseError) {
      console.error("Failed to parse webhook payload:", parseError);
      return json({ error: "Invalid JSON payload" }, { status: 400 });
    }

    // Only log event data for specific events we care about
    if (["installation", "installation_repositories"].includes(event)) {
      console.log("Event data:", JSON.stringify(eventData, null, 2));
    }

    // Handle different webhook events
    switch (event) {
      case "installation":
        await handleInstallationEvent(eventData);
        break;

      case "installation_repositories":
        await handleInstallationRepositoriesEvent(eventData);
        break;

      case "push":
        await handlePushEvent(eventData);
        break;

      case "pull_request":
        await handlePullRequestEvent(eventData);
        break;

      case "issues":
        await handleIssuesEvent(eventData);
        break;

      default:
        console.log(`Unhandled event type: ${event}`);
    }

    return json({ success: true, event, delivery });
  } catch (error) {
    console.error("Webhook error:", error);
    return json({ error: "Internal server error" }, { status: 500 });
  }
}

async function handleInstallationEvent(data: any) {
  const { action, installation, repositories } = data;

  console.log(`🔧 Installation ${action}:`, {
    installationId: installation.id,
    account: installation.account.login,
    repositoryCount: repositories?.length || 0,
  });

  if (action === "created") {
    // App was installed - you can store installation info here
    console.log(`✅ App installed by ${installation.account.login}`);
  } else if (action === "deleted") {
    // App was uninstalled
    console.log(`❌ App uninstalled by ${installation.account.login}`);
  }
}

async function handleInstallationRepositoriesEvent(data: any) {
  const { action, installation, repositories_added, repositories_removed } =
    data;

  console.log(`📁 Installation repositories ${action}:`, {
    installationId: installation.id,
    added: repositories_added?.length || 0,
    removed: repositories_removed?.length || 0,
  });
}

async function handlePushEvent(data: any) {
  const { repository, pusher, commits } = data;

  console.log(`🚀 Push to ${repository.full_name}:`, {
    pusher: pusher.name,
    commits: commits.length,
    branch: data.ref.replace("refs/heads/", ""),
  });

  // Example: Use the pusher's authenticated session
  try {
    const userAuth = githubApp.getUserAuth(pusher.name);
    if (userAuth) {
      console.log(`🔑 Found authenticated user: ${pusher.name}`);

      const environment = {
        LLM_MODEL: "gpt-4",
        LLM_PROVIDER: "openai",
      };
      const secrets = {
        OPENAI_API_KEY: "sk-test", //userAuth.token, // Use the user's token for authentication
      };

      const params = {
        title: `Push by ${pusher.name} to ${repository.full_name}`,
        description: `New push to ${repository.full_name} by ${pusher.name}`,
        repository: {
          url: repository.html_url,
        },
        branch: data.ref.replace("refs/heads/", ""),
        environment,
        secrets,
      };

      console.log("Creating HugEx job with params:", params);

      // Create HugEx job
      const jobId = await hugexService.createJob(pusher.name, params);
      if (jobId) {
        console.log(`✅ Created HugEx job for push event: ${jobId}`);
      } else {
        console.warn(
          `⚠️ Failed to create HugEx job for push event by ${pusher.name}`
        );
      }
    } else {
      console.log(`⚠️ No authentication found for user: ${pusher.name}`);
    }
  } catch (error) {
    console.error("Error handling push event:", error);
  }
}

async function handlePullRequestEvent(data: any) {
  const { action, pull_request, repository } = data;

  console.log(`🔀 Pull request ${action} in ${repository.full_name}:`, {
    number: pull_request.number,
    title: pull_request.title,
    author: pull_request.user.login,
  });

  // Example: Use the PR author's authenticated session
  try {
    const userAuth = githubApp.getUserAuth(pull_request.user.login);
    if (userAuth) {
      console.log(`🔑 Found authenticated user: ${pull_request.user.login}`);
      // You can now use the user's authentication to perform actions
    } else {
      console.log(
        `⚠️ No authentication found for user: ${pull_request.user.login}`
      );
    }
  } catch (error) {
    console.error("Error handling pull request event:", error);
  }
}

async function handleIssuesEvent(data: any) {
  const { action, issue, repository } = data;

  console.log(`🐛 Issue ${action} in ${repository.full_name}:`, {
    number: issue.number,
    title: issue.title,
    author: issue.user.login,
  });

  // Process issue for HugEx if action is 'opened' or 'edited'
  if (["opened", "edited"].includes(action)) {
    try {
      // Check for @hugex mention and create job if found
      const jobCreated = await hugexService.processGitHubIssue(
        issue,
        repository
      );
      if (jobCreated) {
        console.log(`✅ Created HugEx job for issue #${issue.number}`);
      }
    } catch (error) {
      console.error("Error processing issue for HugEx:", error);
    }
  }

  // Example: Use the issue author's authenticated session
  try {
    const userAuth = githubApp.getUserAuth(issue.user.login);
    if (userAuth) {
      console.log(`🔑 Found authenticated user: ${issue.user.login}`);
      // You can now use the user's authentication to perform actions
    } else {
      console.log(`⚠️ No authentication found for user: ${issue.user.login}`);
    }
  } catch (error) {
    console.error("Error handling issues event:", error);
  }
}

// Prevent GET requests
export async function loader() {
  return json(
    { error: "This endpoint only accepts POST requests from GitHub webhooks" },
    { status: 405 }
  );
}