"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createInstallationOctokit = createInstallationOctokit;
exports.handleMount = handleMount;
const auth_app_1 = require("@octokit/auth-app");
const rest_1 = require("@octokit/rest");
const supabase_1 = require("./supabase");
/**
 * Generates a GitHub App Installation Access Token and returns an
 * authenticated Octokit instance scoped to that installation.
 */
async function createInstallationOctokit(installationId) {
    const appId = process.env.APP_ID;
    let privateKey = process.env.PRIVATE_KEY;
    if (!appId || !privateKey) {
        throw new Error('APP_ID and PRIVATE_KEY must be set in environment variables.');
    }
    // Sanitize private key (same as index.ts)
    privateKey = privateKey.replace(/\\n/g, '\n').replace(/^"(.*)"$/, '$1');
    const auth = (0, auth_app_1.createAppAuth)({
        appId: Number(appId),
        privateKey
    });
    // Request an installation access token
    const installationAuth = await auth({
        type: 'installation',
        installationId
    });
    const octokit = new rest_1.Octokit({
        auth: installationAuth.token
    });
    return {
        octokit,
        token: installationAuth.token,
        expiresAt: installationAuth.expiresAt ||
            new Date(Date.now() + 3600000).toISOString()
    };
}
/**
 * Lists all repositories accessible to the given installation.
 * Handles pagination automatically.
 */
async function listInstallationRepos(octokit) {
    const repos = [];
    let page = 1;
    const perPage = 100;
    while (true) {
        const response = await octokit.request('GET /installation/repositories', {
            per_page: perPage,
            page
        });
        const fetchedRepos = response.data.repositories || [];
        for (const repo of fetchedRepos) {
            repos.push(repo.full_name);
        }
        // If we got fewer than perPage, we've reached the last page
        if (fetchedRepos.length < perPage) {
            break;
        }
        page++;
    }
    return repos;
}
/**
 * Updates the user record in Supabase with the installation ID and
 * overwrites selected_repos with the repos from the installation.
 */
async function syncUserInstallation(githubId, installationId, repos) {
    // UPSERT: Update if exists, otherwise this is an error
    // (user should already exist from the OAuth signup flow)
    const result = await supabase_1.db.query(`UPDATE users
     SET github_installation_id = $1,
         selected_repos = $2,
         updated_at = NOW()
     WHERE github_id = $3`, [installationId, repos, githubId]);
    if (result.rowCount === 0) {
        throw new Error(`No user found with github_id=${githubId}. User must sign up before mounting repositories.`);
    }
}
/**
 * Main mount handler — called by the Express route.
 */
async function handleMount(body) {
    const { installationId, githubId } = body;
    // 1. Validate
    if (!installationId || !githubId) {
        return {
            success: false,
            repos: [],
            error: 'Missing required fields: installationId and githubId'
        };
    }
    if (typeof installationId !== 'number' || typeof githubId !== 'number') {
        return {
            success: false,
            repos: [],
            error: 'installationId and githubId must be numbers'
        };
    }
    try {
        // 2. Generate Installation Access Token
        console.log(`[MOUNT] Generating installation token for installation=${installationId}, user=${githubId}`);
        const { octokit, expiresAt } = await createInstallationOctokit(installationId);
        // 3. List accessible repos
        const repos = await listInstallationRepos(octokit);
        console.log(`[MOUNT] Found ${repos.length} repos for installation ${installationId}: ${repos.join(', ')}`);
        // 4. Sync to database (overwrite strategy)
        await syncUserInstallation(githubId, installationId, repos);
        console.log(`[MOUNT] Successfully synced ${repos.length} repos for user ${githubId}`);
        return {
            success: true,
            repos,
            tokenExpiresAt: expiresAt
        };
    }
    catch (err) {
        console.error(`[MOUNT] Error: ${err.message}`);
        return {
            success: false,
            repos: [],
            error: err.message || 'Internal server error'
        };
    }
}
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