"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.CODEQL_OVERLAY_MINIMUM_VERSION = exports.OverlayDatabaseMode = void 0;
exports.writeBaseDatabaseOidsFile = writeBaseDatabaseOidsFile;
exports.writeOverlayChangesFile = writeOverlayChangesFile;
exports.checkOverlayBaseDatabase = checkOverlayBaseDatabase;
exports.uploadOverlayBaseDatabaseToCache = uploadOverlayBaseDatabaseToCache;
exports.downloadOverlayBaseDatabaseFromCache = downloadOverlayBaseDatabaseFromCache;
const fs = __importStar(require("fs"));
const path = __importStar(require("path"));
const actionsCache = __importStar(require("@actions/cache"));
const actions_util_1 = require("./actions-util");
const git_utils_1 = require("./git-utils");
const util_1 = require("./util");
var OverlayDatabaseMode;
(function (OverlayDatabaseMode) {
    OverlayDatabaseMode["Overlay"] = "overlay";
    OverlayDatabaseMode["OverlayBase"] = "overlay-base";
    OverlayDatabaseMode["None"] = "none";
})(OverlayDatabaseMode || (exports.OverlayDatabaseMode = OverlayDatabaseMode = {}));
exports.CODEQL_OVERLAY_MINIMUM_VERSION = "2.20.5";
/**
 * Writes a JSON file containing Git OIDs for all tracked files (represented
 * by path relative to the source root) under the source root. The file is
 * written into the database location specified in the config.
 *
 * @param config The configuration object containing the database location
 * @param sourceRoot The root directory containing the source files to process
 * @throws {Error} If the Git repository root cannot be determined
 */
async function writeBaseDatabaseOidsFile(config, sourceRoot) {
    const gitFileOids = await (0, git_utils_1.getFileOidsUnderPath)(sourceRoot);
    const gitFileOidsJson = JSON.stringify(gitFileOids);
    const baseDatabaseOidsFilePath = getBaseDatabaseOidsFilePath(config);
    await fs.promises.writeFile(baseDatabaseOidsFilePath, gitFileOidsJson);
}
/**
 * Reads and parses the JSON file containing the base database Git OIDs.
 * This file contains the mapping of file paths to their corresponding Git OIDs
 * that was previously written by writeBaseDatabaseOidsFile().
 *
 * @param config The configuration object containing the database location
 * @param logger The logger instance to use for error reporting
 * @returns An object mapping file paths (relative to source root) to their Git OIDs
 * @throws {Error} If the file cannot be read or parsed
 */
async function readBaseDatabaseOidsFile(config, logger) {
    const baseDatabaseOidsFilePath = getBaseDatabaseOidsFilePath(config);
    try {
        const contents = await fs.promises.readFile(baseDatabaseOidsFilePath, "utf-8");
        return JSON.parse(contents);
    }
    catch (e) {
        logger.error("Failed to read overlay-base file OIDs from " +
            `${baseDatabaseOidsFilePath}: ${e.message || e}`);
        throw e;
    }
}
function getBaseDatabaseOidsFilePath(config) {
    return path.join(config.dbLocation, "base-database-oids.json");
}
/**
 * Writes a JSON file containing the source-root-relative paths of files under
 * `sourceRoot` that have changed (added, removed, or modified) from the overlay
 * base database.
 *
 * This function uses the Git index to determine which files have changed, so it
 * requires the following preconditions, both when this function is called and
 * when the overlay-base database was initialized:
 *
 * - It requires that `sourceRoot` is inside a Git repository.
 * - It assumes that all changes in the working tree are staged in the index.
 * - It assumes that all files of interest are tracked by Git, e.g. not covered
 *   by `.gitignore`.
 */
async function writeOverlayChangesFile(config, sourceRoot, logger) {
    const baseFileOids = await readBaseDatabaseOidsFile(config, logger);
    const overlayFileOids = await (0, git_utils_1.getFileOidsUnderPath)(sourceRoot);
    const changedFiles = computeChangedFiles(baseFileOids, overlayFileOids);
    logger.info(`Found ${changedFiles.length} changed file(s) under ${sourceRoot}.`);
    const changedFilesJson = JSON.stringify({ changes: changedFiles });
    const overlayChangesFile = path.join((0, actions_util_1.getTemporaryDirectory)(), "overlay-changes.json");
    logger.debug(`Writing overlay changed files to ${overlayChangesFile}: ${changedFilesJson}`);
    await fs.promises.writeFile(overlayChangesFile, changedFilesJson);
    return overlayChangesFile;
}
function computeChangedFiles(baseFileOids, overlayFileOids) {
    const changes = [];
    for (const [file, oid] of Object.entries(overlayFileOids)) {
        if (!(file in baseFileOids) || baseFileOids[file] !== oid) {
            changes.push(file);
        }
    }
    for (const file of Object.keys(baseFileOids)) {
        if (!(file in overlayFileOids)) {
            changes.push(file);
        }
    }
    return changes;
}
// Constants for database caching
const CACHE_VERSION = 1;
const CACHE_PREFIX = "codeql-overlay-base-database";
const MAX_CACHE_OPERATION_MS = 120_000; // Two minutes
/**
 * Checks that the overlay-base database is valid by checking for the
 * existence of the base database OIDs file.
 *
 * @param config The configuration object
 * @param logger The logger instance
 * @param warningPrefix Prefix for the check failure warning message
 * @returns True if the verification succeeded, false otherwise
 */
function checkOverlayBaseDatabase(config, logger, warningPrefix) {
    // An overlay-base database should contain the base database OIDs file.
    const baseDatabaseOidsFilePath = getBaseDatabaseOidsFilePath(config);
    if (!fs.existsSync(baseDatabaseOidsFilePath)) {
        logger.warning(`${warningPrefix}: ${baseDatabaseOidsFilePath} does not exist`);
        return false;
    }
    return true;
}
/**
 * Uploads the overlay-base database to the GitHub Actions cache. If conditions
 * for uploading are not met, the function does nothing and returns false.
 *
 * This function uses the `checkout_path` input to determine the repository path
 * and works only when called from `analyze` or `upload-sarif`.
 *
 * @param codeql The CodeQL instance
 * @param config The configuration object
 * @param logger The logger instance
 * @returns A promise that resolves to true if the upload was performed and
 * successfully completed, or false otherwise
 */
async function uploadOverlayBaseDatabaseToCache(codeql, config, logger) {
    const overlayDatabaseMode = config.augmentationProperties.overlayDatabaseMode;
    if (overlayDatabaseMode !== OverlayDatabaseMode.OverlayBase) {
        logger.debug(`Overlay database mode is ${overlayDatabaseMode}. ` +
            "Skip uploading overlay-base database to cache.");
        return false;
    }
    if (!config.augmentationProperties.useOverlayDatabaseCaching) {
        logger.debug("Overlay database caching is disabled. " +
            "Skip uploading overlay-base database to cache.");
        return false;
    }
    if ((0, util_1.isInTestMode)()) {
        logger.debug("In test mode. Skip uploading overlay-base database to cache.");
        return false;
    }
    const databaseIsValid = checkOverlayBaseDatabase(config, logger, "Abort uploading overlay-base database to cache");
    if (!databaseIsValid) {
        return false;
    }
    const dbLocation = config.dbLocation;
    const codeQlVersion = (await codeql.getVersion()).version;
    const checkoutPath = (0, actions_util_1.getRequiredInput)("checkout_path");
    const cacheKey = await generateCacheKey(config, codeQlVersion, checkoutPath);
    logger.info(`Uploading overlay-base database to Actions cache with key ${cacheKey}`);
    try {
        const cacheId = await (0, util_1.withTimeout)(MAX_CACHE_OPERATION_MS, actionsCache.saveCache([dbLocation], cacheKey), () => { });
        if (cacheId === undefined) {
            logger.warning("Timed out while uploading overlay-base database");
            return false;
        }
    }
    catch (error) {
        logger.warning("Failed to upload overlay-base database to cache: " +
            `${error instanceof Error ? error.message : String(error)}`);
        return false;
    }
    logger.info(`Successfully uploaded overlay-base database from ${dbLocation}`);
    return true;
}
/**
 * Downloads the overlay-base database from the GitHub Actions cache. If conditions
 * for downloading are not met, the function does nothing and returns false.
 *
 * @param codeql The CodeQL instance
 * @param config The configuration object
 * @param logger The logger instance
 * @returns A promise that resolves to download statistics if an overlay-base
 * database was successfully downloaded, or undefined if the download was
 * either not performed or failed.
 */
async function downloadOverlayBaseDatabaseFromCache(codeql, config, logger) {
    const overlayDatabaseMode = config.augmentationProperties.overlayDatabaseMode;
    if (overlayDatabaseMode !== OverlayDatabaseMode.Overlay) {
        logger.debug(`Overlay database mode is ${overlayDatabaseMode}. ` +
            "Skip downloading overlay-base database from cache.");
        return undefined;
    }
    if (!config.augmentationProperties.useOverlayDatabaseCaching) {
        logger.debug("Overlay database caching is disabled. " +
            "Skip downloading overlay-base database from cache.");
        return undefined;
    }
    if ((0, util_1.isInTestMode)()) {
        logger.debug("In test mode. Skip downloading overlay-base database from cache.");
        return undefined;
    }
    const dbLocation = config.dbLocation;
    const codeQlVersion = (await codeql.getVersion()).version;
    const restoreKey = getCacheRestoreKey(config, codeQlVersion);
    logger.info(`Looking in Actions cache for overlay-base database with restore key ${restoreKey}`);
    let databaseDownloadDurationMs = 0;
    try {
        const databaseDownloadStart = performance.now();
        const foundKey = await (0, util_1.withTimeout)(MAX_CACHE_OPERATION_MS, actionsCache.restoreCache([dbLocation], restoreKey), () => {
            logger.info("Timed out downloading overlay-base database from cache");
        });
        databaseDownloadDurationMs = Math.round(performance.now() - databaseDownloadStart);
        if (foundKey === undefined) {
            logger.info("No overlay-base database found in Actions cache");
            return undefined;
        }
        logger.info(`Downloaded overlay-base database in cache with key ${foundKey}`);
    }
    catch (error) {
        logger.warning("Failed to download overlay-base database from cache: " +
            `${error instanceof Error ? error.message : String(error)}`);
        return undefined;
    }
    const databaseIsValid = checkOverlayBaseDatabase(config, logger, "Downloaded overlay-base database is invalid");
    if (!databaseIsValid) {
        logger.warning("Downloaded overlay-base database failed validation");
        return undefined;
    }
    const databaseSizeBytes = await (0, util_1.tryGetFolderBytes)(dbLocation, logger);
    if (databaseSizeBytes === undefined) {
        logger.info("Filesystem error while accessing downloaded overlay-base database");
        // The problem that warrants reporting download failure is not that we are
        // unable to determine the size of the database. Rather, it is that we
        // encountered a filesystem error while accessing the database, which
        // indicates that an overlay analysis will likely fail.
        return undefined;
    }
    logger.info(`Successfully downloaded overlay-base database to ${dbLocation}`);
    return {
        databaseSizeBytes: Math.round(databaseSizeBytes),
        databaseDownloadDurationMs,
    };
}
async function generateCacheKey(config, codeQlVersion, checkoutPath) {
    const sha = await (0, git_utils_1.getCommitOid)(checkoutPath);
    return `${getCacheRestoreKey(config, codeQlVersion)}${sha}`;
}
function getCacheRestoreKey(config, codeQlVersion) {
    // The restore key (prefix) specifies which cached overlay-base databases are
    // compatible with the current analysis: the cached database must have the
    // same cache version and the same CodeQL bundle version.
    //
    // Actions cache supports using multiple restore keys to indicate preference.
    // Technically we prefer a cached overlay-base database with the same SHA as
    // we are analyzing. However, since overlay-base databases are built from the
    // default branch and used in PR analysis, it is exceedingly unlikely that
    // the commit SHA will ever be the same, so we can just leave it out.
    const languages = [...config.languages].sort().join("_");
    return `${CACHE_PREFIX}-${CACHE_VERSION}-${languages}-${codeQlVersion}-`;
}
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