import { lintSource } from "@secretlint/core";
import { loadConfig, loadPackagesFromConfigDescriptor } from "@secretlint/config-loader";
import { createRawSource } from "@secretlint/source-creator";
import { loadFormatter } from "@secretlint/formatter";
import {
    SecretLintConfigDescriptor,
    SecretLintCoreConfig,
    SecretLintCoreResult,
    SecretLintRuleLocaleTag,
} from "@secretlint/types";
import os from "node:os";
import path from "node:path";
import { secretLintProfiler } from "@secretlint/profiler";
import pMap from "p-map";
import debug0 from "debug";

const debug = debug0("@secretlint/node");
export type SecretLintEngineOptionsBase = {
    /**
     * If cwd is not defined, cwd(current working dir) is current working dir.
     */
    cwd?: string;
    /**
     * If color is false, disable ANSI-color of the output.
     * Default: true
     */
    color?: boolean;
    /**
     * Specify formatter name for output
     */
    formatter: string;
    /**
     * If terminalLink is true, some formatter will output that includes clickable click
     * Support Terminal: https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
     * Default: false
     */
    terminalLink?: boolean;

    /**
     * locale for rule message
     */
    locale?: SecretLintRuleLocaleTag;

    /**
     * If maskSecrets is true, mask secret values with "***".
     * If you want to hide actual secret values, set true
     * https://github.com/secretlint/secretlint/issues/176
     * Default: false
     */
    maskSecrets?: boolean;
};
export type SecretLintEngineOptionsConfigFilePath = SecretLintEngineOptionsBase & {
    /**
     * If configFilePath is not defined, search config file from cwd(current working dir)
     */
    configFilePath?: string;
};
export type SecretLintEngineOptionsConfigFileJSON = SecretLintEngineOptionsBase & {
    /**
     * configFileJSON is a json object
     * that is used instead of configFilePath.
     */
    configFileJSON: SecretLintConfigDescriptor;
};

export type SecretLintEngineOptions = SecretLintEngineOptionsConfigFilePath | SecretLintEngineOptionsConfigFileJSON;

const isConfigFileJSON = (v: any): v is SecretLintEngineOptionsConfigFileJSON => {
    return "configFileJSON" in v && v.configFileJSON !== undefined;
};
const lintFile = async ({
    filePath,
    config,
    options,
}: {
    filePath: string;
    config: SecretLintCoreConfig;
    options: SecretLintEngineOptions;
}) => {
    const rawSource = await createRawSource(filePath);
    return lintSource({
        source: rawSource,
        options: {
            ...options,
            config: config,
        },
    });
};

const hasErrorMessage = (result: SecretLintCoreResult): boolean => {
    return result.messages.length > 0;
};
const executeOnContent = async ({
    content,
    filePath,
    config,
    options,
}: {
    content: string;
    filePath: string;
    config: SecretLintCoreConfig;
    options: SecretLintEngineOptions;
}) => {
    debug("executeOnContent content: %s", `${content.slice(0, 24)}...`);
    debug("executeOnContent filePath: %s", filePath);
    const result = await lintSource({
        source: {
            filePath: filePath,
            content: content,
            ext: path.extname(filePath),
            contentType: "text",
        },
        options: {
            ...options,
            config,
        },
    });
    debug("executeOnContent result: %o", result);
    secretLintProfiler.mark({
        type: "@node>format::start",
    });
    const formatter = await loadFormatter({
        color: options.color ?? true,
        formatterName: options.formatter,
        terminalLink: options.terminalLink ?? false,
    });
    const output = formatter.format([result]);
    secretLintProfiler.mark({
        type: "@node>format::end",
    });
    return {
        ok: !hasErrorMessage(result),
        output: output,
    };
};

const executeOnFiles = async ({
    filePathList,
    config,
    options,
}: {
    filePathList: string[];
    config: SecretLintCoreConfig;
    options: SecretLintEngineOptions;
}) => {
    const mapper = async (filePath: string) => {
        debug("executeOnFiles file: %s", filePath);
        const result = await lintFile({ filePath: filePath, config: config, options: options });
        debug("executeOnFiles result: %o", result);
        return result;
    };
    const results = await pMap(filePathList, mapper, {
        // Avoid: EMFILE: too many open files, uv_cwd
        // https://github.com/secretlint/secretlint/issues/72
        concurrency: os.cpus().length,
    });
    debug("executeOnFiles result counts: %s", results.length);
    secretLintProfiler.mark({
        type: "@node>format::start",
    });
    const formatter = await loadFormatter({
        color: options.color ?? true,
        formatterName: options.formatter,
        terminalLink: options.terminalLink ?? false,
    });
    const output = formatter.format(results);
    secretLintProfiler.mark({
        type: "@node>format::end",
    });
    const hasErrorAtLeastOne = results.some((result) => {
        return hasErrorMessage(result);
    });
    return {
        ok: !hasErrorAtLeastOne,
        output: output,
    };
};

/**
 * Create SecretLint Engine and return the instance.
 * The engine load config file(.secretlintrc) automatically
 * @param options
 */
export const createEngine = async (options: SecretLintEngineOptions) => {
    secretLintProfiler.mark({
        type: "@node>load-config::start",
    });
    const loadedResult = await (async () => {
        if (isConfigFileJSON(options)) {
            debug("Load ConfigFileJSON: %s", options.configFileJSON);
            return loadPackagesFromConfigDescriptor({
                configDescriptor: options.configFileJSON,
            });
        }
        const loadConfigResult = await loadConfig({
            cwd: options.cwd,
            configFilePath: options.configFilePath,
        });
        debug("Loaded ConfigFilePath: %s", loadConfigResult.configFilePath);
        return loadConfigResult;
    })();
    secretLintProfiler.mark({
        type: "@node>load-config::end",
    });
    if (!loadedResult.ok) {
        throw new Error("Fail to load secretlint config");
    }
    debug("Config: %O", loadedResult.config);
    return {
        /**
         * Lint a content and return the formatted results
         * @param content
         * @param filePath
         */
        executeOnContent: ({ content, filePath }: { content: string; filePath: string }) => {
            debug("executeOnContent content: %s", content);
            debug("executeOnContent filePath: %s", filePath);
            secretLintProfiler.mark({
                type: "@node>execute::start",
            });
            return executeOnContent({
                content,
                filePath,
                config: loadedResult.config,
                options: options,
            }).finally(() => {
                secretLintProfiler.mark({
                    type: "@node>execute::end",
                });
            });
        },
        /**
         * Lint files and return the formatted results
         * @param filePathList
         */
        executeOnFiles: ({ filePathList }: { filePathList: string[] }) => {
            debug("executeOnFiles file counts: %s", filePathList.length);
            secretLintProfiler.mark({
                type: "@node>execute::start",
            });
            return executeOnFiles({
                filePathList,
                config: loadedResult.config,
                options: options,
            }).finally(() => {
                secretLintProfiler.mark({
                    type: "@node>execute::end",
                });
            });
        },
    };
};