import * as core from '@actions/core'
import * as github from '@actions/github'
import {SUMMARY_ENV_VAR} from '@actions/core/lib/summary'

import * as params from './input-params'
import {BuildResult} from './build-results'
import {CacheListener, generateCachingReport} from './cache-reporting'

export async function generateJobSummary(buildResults: BuildResult[], cacheListener: CacheListener): Promise<void> {
    const summaryTable = renderSummaryTable(buildResults)
    const cachingReport = generateCachingReport(cacheListener)

    if (shouldGenerateJobSummary()) {
        core.info('Generating Job Summary')

        core.summary.addRaw(summaryTable)
        core.summary.addRaw(cachingReport)
        await core.summary.write()
    } else {
        core.info('============================')
        core.info(summaryTable)
        core.info('============================')
        core.info(cachingReport)
        core.info('============================')
    }

    if (shouldAddPRComment()) {
        await addPRComment(summaryTable)
    }
}

async function addPRComment(jobSummary: string): Promise<void> {
    try {
        const github_token = params.getGithubToken()

        const context = github.context
        if (context.payload.pull_request == null) {
            core.info('No pull_request trigger: not adding PR comment')
            return
        }

        const pull_request_number = context.payload.pull_request.number
        core.info(`Adding Job Summary as comment to PR #${pull_request_number}.`)

        const prComment = `<h3>Job Summary for gradle-build-action</h3>
<h5>${github.context.workflow} :: <em>${github.context.job}</em></h5>

${jobSummary}`

        const octokit = github.getOctokit(github_token)
        await octokit.rest.issues.createComment({
            ...context.repo,
            issue_number: pull_request_number,
            body: prComment
        })
    } catch (error) {
        core.warning(`Failed to generate PR comment: ${String(error)}`)
    }
}

function renderSummaryTable(results: BuildResult[]): string {
    if (results.length === 0) {
        return 'No Gradle build results detected.'
    }

    return `
<table>
    <tr>
        <th>Gradle Root Project</th>
        <th>Requested Tasks</th>
        <th>Gradle Version</th>
        <th>Build Outcome</th>
        <th>Build Scan®</th>
    </tr>${results.map(result => renderBuildResultRow(result)).join('')}
</table>
    `
}

function renderBuildResultRow(result: BuildResult): string {
    return `
    <tr>
        <td>${result.rootProjectName}</td>
        <td>${result.requestedTasks}</td>
        <td align='center'>${result.gradleVersion}</td>
        <td align='center'>${renderOutcome(result)}</td>
        <td>${renderBuildScan(result)}</td>
    </tr>`
}

function renderOutcome(result: BuildResult): string {
    return result.buildFailed ? ':x:' : ':white_check_mark:'
}

function renderBuildScan(result: BuildResult): string {
    if (result.buildScanFailed) {
        return renderBuildScanBadge(
            'PUBLISH_FAILED',
            'orange',
            'https://docs.gradle.com/enterprise/gradle-plugin/#troubleshooting'
        )
    }
    if (result.buildScanUri) {
        return renderBuildScanBadge('PUBLISHED', '06A0CE', result.buildScanUri)
    }
    return renderBuildScanBadge('NOT_PUBLISHED', 'lightgrey', 'https://scans.gradle.com')
}

function renderBuildScanBadge(outcomeText: string, outcomeColor: string, targetUrl: string): string {
    const badgeUrl = `https://img.shields.io/badge/Build%20Scan%C2%AE-${outcomeText}-${outcomeColor}?logo=Gradle`
    const badgeHtml = `<img src="${badgeUrl}" alt="Build Scan ${outcomeText}" />`
    return `<a href="${targetUrl}" rel="nofollow">${badgeHtml}</a>`
}

function shouldGenerateJobSummary(): boolean {
    // Check if Job Summary is supported on this platform
    if (!process.env[SUMMARY_ENV_VAR]) {
        return false
    }

    return params.isJobSummaryEnabled()
}

function shouldAddPRComment(): boolean {
    return params.isPRCommentEnabled()
}