import * as core from "@actions/core";
import * as path from "path";
import {parseArgsStringToArgv} from "string-argv";

import * as execution from "./execution";
import * as gradlew from "./gradlew";
import * as provision from "./provision";


// Invoked by Github Actions
export async function run() {
    try {

        const baseDirectory = process.env[`GITHUB_WORKSPACE`] || "";

        let result = await execution.execute(
            await resolveGradleExecutable(baseDirectory),
            resolveBuildRootDirectory(baseDirectory),
            parseCommandLineArguments()
        );

        if (result.buildScanUrl) {
            core.setOutput("build-scan-url", result.buildScanUrl);
        }

        if (result.status != 0) {
            core.setFailed(`Gradle process exited with status ${result.status}`)
        }

    } catch (error) {
        core.setFailed(error.message);
    }
}


run();


async function resolveGradleExecutable(baseDirectory: string): Promise<string> {

    const gradleVersion = inputOrNull("gradle-version");
    if (gradleVersion != null) {
        return provision.gradleVersion(gradleVersion)
    }

    const gradleExecutable = inputOrNull("gradle-executable");
    if (gradleExecutable != null) {
        return path.join(baseDirectory, gradleExecutable)
    }

    const wrapperDirectory = inputOrNull("wrapper-directory");
    const executableDirectory = wrapperDirectory != null
        ? path.join(baseDirectory, wrapperDirectory)
        : baseDirectory;

    return path.join(executableDirectory, gradlew.wrapperFilename());
}


function resolveBuildRootDirectory(baseDirectory: string): string {
    let buildRootDirectory = inputOrNull("build-root-directory");
    return buildRootDirectory == null ? baseDirectory : path.join(baseDirectory, buildRootDirectory);
}


function parseCommandLineArguments(): string[] {
    const input = inputOrNull("arguments");
    return input == null ? [] : parseArgsStringToArgv(input)
}


function inputOrNull(name: string): string | null {
    const inputString = core.getInput(name);
    if (inputString.length == 0) {
        return null;
    }
    return inputString
}