# https://aka.ms/yaml

jobs:
- job: test
  displayName: 'Lint & Test'

  pool:
    vmImage: 'Ubuntu-16.04'

  steps:
    - script: |
        set -euo pipefail

        REQUEST_URL="https://dev.azure.com/\
        python-discord/${SYSTEM_TEAMPROJECTID}/_apis/build/builds?\
        queryOrder=finishTimeDescending&\
        resultFilter=succeeded&\
        \$top=1&\
        repositoryType=${BUILD_REPOSITORY_PROVIDER}&\
        repositoryId=${BUILD_REPOSITORY_NAME}&\
        branchName=${BUILD_SOURCEBRANCH}&\
        api-version=5.0"

        printf '%s\n' "Retrieving latest successful build using ${REQUEST_URL}"
        response="$(curl -sSL "${REQUEST_URL}")"

        if [[ "$(printf '%s' "${response}" | jq -re '.count')" = 0 ]]; then
            (>&2 echo \
                "No previous build was found." \
                "Either the previous build is too old and was deleted" \
                "or the branch was empty before this build."
            )
            exit 0
        fi

        prev_build="$(printf '%s' "${response}" | jq -re '.value[0].id')"
        printf '%s\n' "Most recent successful build: ${prev_build}"
        printf '%s\n' "##vso[task.setvariable variable=PREV_BUILD;isOutput=true]${prev_build}"

        if [[ "${BUILD_REASON}" = "PullRequest" ]]; then
            key='triggerInfo."pr.sourceSha"'
        else
            key='sourceVersion'
        fi

        prev_commit="$(printf '%s' "${response}" | jq -re ".value[0].${key}")"
        printf '%s\n' "Previous commit: ${prev_commit}"
        printf '%s\n' "##vso[task.setvariable variable=PREV_COMMIT;isOutput=true]${prev_commit}"
      displayName: 'Get Previous Successful Build'

    - script: echo $(PREV_BUILD)

    - task: ShellScript@2
      inputs:
        scriptPath: './scripts/test.sh'
        args: $(PREV_BUILD)
      displayName: 'Print PREV_BUILD'

    - task: DownloadPipelineArtifact@2
      inputs:
        buildType: 'specific'
        project: $(System.TeamProjectId)
        pipeline: $(System.DefinitionId)
        buildVersionToDownload: 'specific'
        buildId: $(PREV_BUILD)
        artifactName: 'base_id'
      displayName: 'Download Base ID Artifact'

    - script: |
        base_id="$(cat "${SYSTEM_ARTIFACTSDIRECTORY}"/base.sha256)"
        printf '%s\n' "##vso[task.setvariable variable=BASE_ID]${base_id}"
      displayName: 'Write Base ID to Variable'

    - script: docker build -t pythondiscord/snekbox-base:latest -f docker/base.Dockerfile .
      displayName: 'Build Base Image'

    - script: |
        id="$(docker images -q --no-trunc pythondiscord/snekbox-base:latest)"
        if [[ -z "${id}" ]]; then
          (>&2 echo 'failed to get ID of pythondiscord/snekbox-base:latest')
            exit 1
        fi

        printf '%s\n' "Base ID is ${id}"
        printf '%s' "${id}" >> base.sha256
      displayName: 'Create Base ID Artifact'

    - task: PublishPipelineArtifact@1
      inputs:
        path: base.sha256
        artifact: BaseId
      displayName: 'Publish Base ID Artifact'
      enabled: false