name: "Publish Hex Release"

on:
  workflow_dispatch:
    inputs:
      package:
        description: "Package"
        type: choice
        options:
          - "aws_xray"
          - "cowboy"
          - "dataloader"
          - "ecto"
          - "elli"
          - "finch"
          - "grpcbox"
          - "http_instrumentation"
          - "httpoison"
          - "nebulex"
          - "oban"
          - "opentelemetry_telemetry"
          - "phoenix"
          - "process_propagator"
          - "redix"
          - "req"
          - "tesla"
        required: true
      action:
        description: "Publish release"
        required: true
        type: choice
        options:
          - prep
          - publish

jobs:
  config:
    runs-on: ubuntu-latest
    outputs:
      authorized_users: ${{ steps.set-config.outputs.authorized_users }}
      build_tool: ${{ steps.set-config.outputs.build_tool }}
      language: ${{ steps.set-config.outputs.language }}
      name: ${{ steps.set-config.outputs.name }}
      package_name: ${{ steps.set-config.outputs.package_name }}
      tag_prefix: ${{ steps.set-config.outputs.tag_prefix}}
      working_directory: ${{ steps.set-config.outputs.working_directory }}
    steps:
      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
      - name: Read file
        id: set-config
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
        env:
          package: ${{ inputs.package }}
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs');
            const steps = ${{ toJson(steps) }};

            const configFile = JSON.parse(fs.readFileSync('.github/hex-packages.json', 'UTF8'))
            const packageConfig = configFile[process.env.package]

            const workingDir = packageConfig['workingDirectory']
            switch(workingDir) {
              case undefined:
              case '':
                core.setOutput('working_directory', './')
                break;
              default:
                core.setOutput('working_directory', workingDir)
            }

            core.setOutput('name', packageConfig.name)
            core.setOutput('package_name', packageConfig.packageName)
            core.setOutput('tag_prefix', packageConfig.tagPrefix)
            core.setOutput('build_tool', packageConfig.buildTool)
            core.setOutput('language', packageConfig.language)
            core.setOutput('authorized_users', packageConfig.authorizedUsers)

  authorized_publisher:
    needs: config
    runs-on: ubuntu-latest
    steps:
      - run: ${{ contains(fromJson(needs.config.outputs.authorized_users), github.actor) }}

  publish:
    needs: [authorized_publisher, config]
    runs-on: ubuntu-latest

    permissions:
      # write permission is required to create a github release
      contents: write
      pull-requests: write
    steps:
      - name: "Fetch Github Draft Release"
        id: fetch-release
        run: |
          release="$(gh api repos/${{ github.repository }}/releases --jq '.[] | select(.draft == true)  | select(.tag_name | test("^${{ needs.config.outputs.tag_prefix }}"))')"

          echo "gh_release=$release" >> $GITHUB_OUTPUT
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - name: Checkout
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
      - run: npm install semver
      - name: "Update Files"
        id: update-files
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs');
            const semver = require('semver');
            const needs = ${{ toJson(needs) }};
            const steps = ${{ toJson(steps) }};

            const ghRelease = JSON.parse(steps["fetch-release"]["outputs"]["gh_release"])

            const semverRegex = /v(?<tagvsn>\d+\.\d+\.\d+)$/;

            let match = ghRelease.tag_name.match(semverRegex);
            let version = match.groups.tagvsn;

            core.exportVariable('package_version', version);
            core.exportVariable('gh_release_tag_name', ghRelease.tag_name)

            core.info(`Draft release tag to be created: ${version}`)

            var srcFilePath = "";
            var srcVersionRegex = "";
            var vsnLineTemplate = "";

            core.debug(`Language: ${needs.config.outputs.language}`)

            switch(needs.config.outputs.language) {
              case 'elixir':
                srcFilePath = `${needs.config.outputs.working_directory}/mix.exs`;
                core.debug(`Source file path: ${srcFilePath}`)
                
                srcVersionRegex = /@version\s+"[^"]+"/;
                core.debug(`Source version regex: ${srcVersionRegex}`)
                
                vsnLineTemplate = `@version "${version}"`;
                core.debug(`Version line template: ${vsnLineTemplate}`)
                
                core.setOutput('srcFilePath', srcFilePath);
                break;
              case 'elixir-erlang':
              case 'erlang':
                srcFilePath = `${needs.config.outputs.working_directory}/src/${needs.config.outputs.package_name}.app.src`;
                core.debug(`Source file path: ${srcFilePath}`)
                
                srcVersionRegex = /{vsn,\s+"[^"]+"},/;
                core.debug(`Source version regex: ${srcVersionRegex}`)
                
                vsnLineTemplate = `{vsn, "${version}"},`;
                core.debug(`Version line template: ${vsnLineTemplate}`)
                
                core.setOutput('srcFilePath', srcFilePath);
                break;
              default:
                core.setFailed('Language not recognized');
            }

            core.info(`srcFilePath: ${srcFilePath}`)

            let srcFile = fs.readFileSync(srcFilePath, 'UTF8')

            var srcVersion = srcFile.match(srcVersionRegex)[0].split('"')[1]
            core.exportVariable('src_file_version', srcVersion)
            core.info(`Source file version: ${srcVersion}`)

            core.exportVariable('releasePrepped', true)
            core.setOutput('srcFileUpdated', false)

            if (!semver.eq(version, srcVersion)) {
              core.exportVariable('releasePrepped', false)
              core.exportVariable('published', false)

              if (semver.lt(version, srcVersion)) {
                core.setFailed(`Proposed package version does not increment the current version`)
              } else {
                core.setOutput('prRequired')
                core.notice('Release not ready. Creating PR.')

                let updatedSrcFile = srcFile.replace(srcVersionRegex, vsnLineTemplate);
                fs.writeFileSync(srcFilePath, updatedSrcFile);

                core.setOutput('srcFileUpdated', true)
              }
            }

      - uses: erlef/setup-beam@2f0cc07b4b9bea248ae098aba9e1a8a1de5ec24c # v1
        with:
          version-type: strict
          otp-version: "25.3.2.5"
          elixir-version: "1.14.5"
          rebar3-version: "3.22.1"

      - name: "Mix Hex Publish Dry-run"
        if: ${{ needs.config.outputs.build_tool == 'mix' }}
        working-directory: ${{ needs.config.outputs.working_directory }}
        env:
          HEX_API_KEY: ${{ secrets.OTEL_HEX_KEY }}
        run: |
          mix deps.get
          mix hex.publish --dry-run --yes

      - name: "Rebar3 Hex Publish Dry-run"
        if: ${{ needs.config.outputs.build_tool == 'rebar3' }}
        working-directory: ${{ needs.config.outputs.working_directory }}
        env:
          HEX_API_KEY: ${{ secrets.OTEL_HEX_KEY }}
        run: |
          rebar3 upgrade
          rebar3 hex publish --dry-run --yes

      - name: "Open a Version Update PR"
        if: ${{ env.releasePrepped == 'false' }}
        id: version-update-pr
        uses: peter-evans/create-pull-request@a4f52f8033a6168103c2538976c07b467e8163bc # v6
        with:
          add-paths: |
            ${{ steps.update-files.outputs.srcFilePath }}
          base: main
          branch: "${{ needs.config.outputs.tag_prefix }}${{ env.package_version }}-release"
          commit-message: "Prep release v${{ env.package_version }}"
          body: |
            Prepare hex release v${{ env.package_version }}
          labels: |
            automated-pr
            release
            skip-changelog
          title: "${{ needs.config.outputs.name }} v${{ env.package_version }}"
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: "Publish Github Release"
        if: ${{ env.releasePrepped == 'true' && inputs.action == 'publish' }}
        id: publish-gh-release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh release edit ${{ env.gh_release_tag_name }} --draft=false --latest

      - name: "Mix Publish to Hex"
        id: mix-hex-publish
        if: ${{ env.releasePrepped == 'true' && inputs.action == 'publish' && needs.config.outputs.build_tool == 'mix' }}
        working-directory: ${{ needs.config.outputs.working_directory }}
        env:
          HEX_API_KEY: ${{ secrets.OTEL_HEX_KEY }}
        run: |
          mix hex.publish --yes
          echo "published=true" >> $GITHUB_ENV

      - name: "Rebar3 Publish to Hex"
        id: rebar3-hex-publish
        if: ${{ env.releasePrepped == 'true' && inputs.action == 'publish' && needs.config.outputs.build_tool == 'rebar3' }}
        working-directory: ${{ needs.config.outputs.working_directory }}
        env:
          HEX_API_KEY: ${{ secrets.OTEL_HEX_KEY }}
        run: |
          rebar3 upgrade
          rebar3 hex publish --yes
          echo "published=true" >> $GITHUB_ENV