import * as process from 'process';
import * as os from 'os';

import * as core from '@actions/core';
import * as github from '@actions/github';

import { Cargo } from '@actions-rs/core';

import * as input from './input';
import * as interfaces from './interfaces';
import * as reporter from './reporter';

const pkg = require('../package.json'); // eslint-disable-line @typescript-eslint/no-var-requires

const USER_AGENT = `${pkg.name}/${pkg.version} (${pkg.bugs.url})`;

async function getData(
    ignore: string[] | undefined,
): Promise<interfaces.Report> {
    const cargo = await Cargo.get();
    await cargo.findOrInstall('cargo-audit');

    await cargo.call(['generate-lockfile']);

    let stdout = '';
    try {
        core.startGroup('Calling cargo-audit (JSON output)');
        const commandArray = ['audit'];
        for (const item of ignore ?? []) {
            commandArray.push('--ignore', item);
        }
        commandArray.push('--json');
        await cargo.call(commandArray, {
            ignoreReturnCode: true,
            listeners: {
                stdout: (buffer) => {
                    stdout += buffer.toString();
                },
            },
        });
    } finally {
        // Cool story: `cargo-audit` JSON output is missing the trailing `\n`,
        // so the `::endgroup::` annotation from the line below is being
        // eaten by it.
        // Manually writing the `\n` to denote the `cargo-audit` end
        process.stdout.write(os.EOL);
        core.endGroup();
    }

    return JSON.parse(stdout);
}

export async function run(actionInput: input.Input): Promise<void> {
    const ignore = actionInput.ignore;
    const report = await getData(ignore);
    let shouldReport = false;
    if (!report.vulnerabilities.found) {
        core.info('No vulnerabilities were found');
    } else {
        core.warning(`${report.vulnerabilities.count} vulnerabilities found!`);
        shouldReport = true;
    }

    // In `cargo-audit < 0.12` report contained an array of `Warning`.
    // In `cargo-audit >= 0.12` it is a JSON object,
    // where key is a warning type, and value is an array of `Warning` of that type.
    let warnings: Array<interfaces.Warning> = [];
    if (Array.isArray(report.warnings)) {
        warnings = report.warnings;
    } else {
        for (const items of Object.values(report.warnings)) {
            warnings = warnings.concat(items);
        }
    }

    if (warnings.length === 0) {
        core.info('No warnings were found');
    } else {
        core.warning(`${warnings.length} warnings found!`);
        shouldReport = true;
    }

    if (!shouldReport) {
        return;
    }

    const client = new github.GitHub(actionInput.token, {
        userAgent: USER_AGENT,
    });
    const advisories = report.vulnerabilities.list;
    if (github.context.eventName == 'schedule') {
        core.debug(
            'Action was triggered on a schedule event, creating an Issues report',
        );
        await reporter.reportIssues(client, advisories, warnings);
    } else {
        core.debug(
            `Action was triggered on a ${github.context.eventName} event, creating a Check report`,
        );
        await reporter.reportCheck(client, advisories, warnings);
    }
}

async function main(): Promise<void> {
    try {
        const actionInput = input.get();
        await run(actionInput);
    } catch (error) {
        core.setFailed(error.message);
    }

    return;
}

main();