const core = require("@actions/core");
const github = require("@actions/github");

const sanitizeTask = (text) =>
  (text || "").replace(/@bot\b[:]?\s*/gi, "").trim();

async function fetchFirstIssueComment(
  repoFullName,
  issueNumber,
  githubToken,
  serverUrl,
) {
  if (!repoFullName || !issueNumber) return null;

  const url = `${serverUrl}/api/v1/repos/${repoFullName}/issues/${issueNumber}/comments?limit=1`;
  const headers = { Accept: "application/vnd.github+json" };

  if (githubToken) {
    headers.Authorization = `Bearer ${githubToken}`;
  }

  try {
    const response = await fetch(url, { headers });
    if (!response.ok) {
      core.warning(
        `Failed to fetch issue comments (${response.status}): ${response.statusText}`,
      );
      return null;
    }

    const comments = await response.json();
    if (!Array.isArray(comments) || comments.length === 0) return null;

    return sanitizeTask(comments[0]?.body);
  } catch (error) {
    core.warning(`Error fetching issue comments: ${error}`);
    return null;
  }
}

async function run() {
  const apiUrl =
    core.getInput("api_url") || "http://agents-api.servc-nonprod:3000";
  const apiToken = core.getInput("api_token");
  const botRoute = core.getInput("bot_route") || "agent-bot";
  const debug = (core.getInput("debug") || "false").toLowerCase() === "true";
  const serverUrl = (
    process.env.GITHUB_SERVER_URL ||
    github.context.serverUrl ||
    "https://git.yusufali.ca"
  ).replace(/\/$/, "");

  const payload = github.context.payload;
  const commentBody = payload?.comment?.body || "";
  const issueNumber = payload?.issue?.number;
  const repoName = payload?.repository?.full_name;
  const repoUrl = payload?.repository?.clone_url;
  const githubToken = process.env.GITHUB_TOKEN;

  if (!commentBody) {
    if (!debug) {
      core.setFailed("No comment body found in the event payload");
      return;
    }

    core.info(
      "No comment body found in the event payload, continuing because debug is enabled",
    );
  }

  let task =
    (await fetchFirstIssueComment(
      repoName,
      issueNumber,
      githubToken,
      serverUrl,
    )) || sanitizeTask(commentBody);

  if (!task) {
    if (!debug) {
      core.setFailed("Unable to determine the task to send to the agent");
      return;
    }

    core.info("Unable to determine the task, using debug placeholder");
    task = "[debug] empty task";
  }

  const requestPayload = {
    type: "input",
    route: botRoute,
    argumentId: "plain",
    force: true,
    instanceId: null,
    inputs: {
      method: "start",
      inputs: {
        repo_name: repoName,
        repo_url: repoUrl,
        issue_number: String(issueNumber),
        task,
      },
    },
  };

  if (debug) {
    core.info(`API URL: ${apiUrl}`);
    core.info(`Route: ${botRoute}`);
    core.info(`Server URL: ${serverUrl}`);
    core.info(`Using auth: ${Boolean(apiToken)}`);
    core.info(`Request payload: ${JSON.stringify(requestPayload)}`);
  }

  try {
    const headers = {
      "Content-Type": "application/json",
    };

    if (apiToken) {
      headers.Apitoken = apiToken;
    }

    const response = await fetch(apiUrl, {
      method: "POST",
      headers,
      body: JSON.stringify(requestPayload),
    });

    const responseText = await response.text();

    if (!response.ok) {
      core.setFailed(
        `Agent API request failed (${response.status}): ${responseText}`,
      );
      return;
    }

    core.info(`Agent response: ${responseText}`);
  } catch (error) {
    core.setFailed(`Error sending task to agent: ${error}`);
  }
}

run();