import * as exec from '@actions/exec'
import fs from 'fs'
import path from 'path'
import {CacheCleaner} from '../../src/cache-cleaner'

jest.setTimeout(120000)

test('will cleanup unused dependency jars and build-cache entries', async () => {
    const projectRoot = prepareTestProject()
    const gradleUserHome = path.resolve(projectRoot, 'HOME')
    const tmpDir = path.resolve(projectRoot, 'tmp')
    const cacheCleaner = new CacheCleaner(gradleUserHome, tmpDir)

    await runGradleBuild(projectRoot, 'build', '3.1')
    
    await cacheCleaner.prepare()

    await runGradleBuild(projectRoot, 'build', '3.1.1')

    const commonsMath31 = path.resolve(gradleUserHome, "caches/modules-2/files-2.1/org.apache.commons/commons-math3/3.1")
    const commonsMath311 = path.resolve(gradleUserHome, "caches/modules-2/files-2.1/org.apache.commons/commons-math3/3.1.1")
    const buildCacheDir = path.resolve(gradleUserHome, "caches/build-cache-1")

    expect(fs.existsSync(commonsMath31)).toBe(true)
    expect(fs.existsSync(commonsMath311)).toBe(true)
    expect(fs.readdirSync(buildCacheDir).length).toBe(4)

    await cacheCleaner.forceCleanup()

    expect(fs.existsSync(commonsMath31)).toBe(false)
    expect(fs.existsSync(commonsMath311)).toBe(true)
    expect(fs.readdirSync(buildCacheDir).length).toBe(3)
})

test('will cleanup unused gradle versions', async () => {
    const projectRoot = prepareTestProject()
    const gradleUserHome = path.resolve(projectRoot, 'HOME')
    const tmpDir = path.resolve(projectRoot, 'tmp')
    const cacheCleaner = new CacheCleaner(gradleUserHome, tmpDir)

    // Initialize HOME with 2 different Gradle versions
    await runGradleWrapperBuild(projectRoot, 'build')
    await runGradleBuild(projectRoot, 'build')
    
    await cacheCleaner.prepare()

    // Run with only one of these versions
    await runGradleBuild(projectRoot, 'build')

    const gradle733 = path.resolve(gradleUserHome, "caches/7.3.3")
    const wrapper733 = path.resolve(gradleUserHome, "wrapper/dists/gradle-7.3.3-bin")
    const gradleCurrent = path.resolve(gradleUserHome, "caches/7.6")

    expect(fs.existsSync(gradle733)).toBe(true)
    expect(fs.existsSync(wrapper733)).toBe(true)
    expect(fs.existsSync(gradleCurrent)).toBe(true)

    await cacheCleaner.forceCleanup()

    expect(fs.existsSync(gradle733)).toBe(false)
    expect(fs.existsSync(wrapper733)).toBe(false)
    expect(fs.existsSync(gradleCurrent)).toBe(true)
})

async function runGradleBuild(projectRoot: string, args: string, version: string = '3.1'): Promise<void> {
    const status31 = await exec.exec(`gradle -g HOME --no-daemon --build-cache -Dcommons_math3_version="${version}" ${args}`, [], {
        cwd: projectRoot
    })
    console.log(`Gradle User Home initialized with commons_math3_version=${version} ${args}`)
}

async function runGradleWrapperBuild(projectRoot: string, args: string, version: string = '3.1'): Promise<void> {
    const status31 = await exec.exec(`./gradlew -g HOME --no-daemon --build-cache -Dcommons_math3_version="${version}" ${args}`, [], {
        cwd: projectRoot
    })
    console.log(`Gradle User Home initialized with commons_math3_version="${version}" ${args}`)
}

function prepareTestProject(): string {
    const projectRoot = 'test/jest/resources/cache-cleanup'
    fs.rmSync(path.resolve(projectRoot, 'HOME'), { recursive: true, force: true })
    fs.rmSync(path.resolve(projectRoot, 'tmp'), { recursive: true, force: true })
    fs.rmSync(path.resolve(projectRoot, 'build'), { recursive: true, force: true })
    fs.rmSync(path.resolve(projectRoot, '.gradle'), { recursive: true, force: true })
    return projectRoot
}