digraph G {
    subgraph main {
        rankDir=UD;
        compound=true;
        nodesep=2;
        margin=0
        style="invis"

        scheduler [
            shapefile="./actor.png",
            peripheries = 0,
            label="\n\n\n\n\n\n\n\nGitHub Actions Cron",
            rank=min
        ]

        contributor [
            shapefile="./actor.png",
            peripheries = 0,
            label="\n\n\n\n\n\n\n\nContributor",
            rank=min
        ]

        maintainer [
            shapefile="./actor.png",
            peripheries = 0,
            label="\n\n\n\n\n\n\n\nMaintainer",
            rank=min
        ]

        edge [arrowhead="vee", label=""];

        # Tool Updater Flow    
        scheduler -> "Tool Updater" [label="Every Midnight UTC"]

        "Tool Updater" -> "Check for PDK Updates"
        "Tool Updater" -> "Check for Tool Updates"

        "Check for Tool Updates" -> "Pull Request" [label="[updates found]"]
        "Check for PDK Updates" -> "Pull Request"
        [label="[updates found]"]

        # Pull Request Flow
        bdi_fast [
            label="Build Docker Image"
        ]
        contributor -> "Pull Request"
        "Pull Request" -> bdi_fast
        bdi_fast -> "Fastest Test Set" [label="[image built successfully]"]
        bdi_fast -> "PR CI Fails" [label="[else]"]
        "Fastest Test Set" -> "Valid Pull Request" [label="[test pass]"]
        "Fastest Test Set" -> "PR CI Fails" [label="[else]"]
        "Valid Pull Request" -> "Review"
        maintainer -> "Review" [label="approve"]
        "Review" -> "Good Pull Request"

        # Extended Test Set Flow
        bdi_full [
            label="Build Docker Image"
        ]
        maintainer -> bdi_full [label="Manual Dispatch"]
        scheduler -> bdi_full [ label="Every Midnight UTC"]
        bdi_full -> "Extended Test Set" [label="[image built successfully]"]
        bdi_full -> "Deployment CI Fails" [label="[else]"]
        "Extended Test Set" -> "Create New Version" [label="[tests pass]"]
        "Extended Test Set" -> "Deployment CI Fails" [label="[else]"]
        "Create New Version" -> "Deploy Docker Image To DockerHub"
    }

}