digraph JiraVein {
    rankdir=LR;
    compound=true;
    fontname="Helvetica";
    node [fontname="Helvetica", fontsize=11, shape=box, style="rounded,filled"];
    edge [fontname="Helvetica", fontsize=10];

    labelloc="t";
    label="Jira Vein - API Flow";
    fontsize=16;

    // Client
    subgraph cluster_client {
        label="Soleprint";
        style=filled;
        color="#E8F5E9";
        fillcolor="#E8F5E9";

        app [label="Application", fillcolor="#C8E6C9"];
        vein [label="Jira Vein\n(artery/veins/jira)", fillcolor="#A5D6A7"];
    }

    // Auth
    subgraph cluster_auth {
        label="Authentication";
        style=filled;
        color="#FFF8E1";
        fillcolor="#FFF8E1";

        token [label="API Token\n(Basic Auth)", fillcolor="#FFECB3"];
    }

    // Jira API
    subgraph cluster_jira {
        label="Jira Cloud API";
        style=filled;
        color="#E3F2FD";
        fillcolor="#E3F2FD";

        issues [label="/rest/api/3/issue", fillcolor="#BBDEFB"];
        search [label="/rest/api/3/search", fillcolor="#BBDEFB"];
        projects [label="/rest/api/3/project", fillcolor="#BBDEFB"];
        transitions [label="/rest/api/3/issue/{id}/transitions", fillcolor="#BBDEFB"];
    }

    // Flow
    app -> vein [label="get_issue()"];
    vein -> token [label="auth"];
    token -> issues [label="GET/POST"];
    token -> search [label="JQL"];
    token -> projects [label="list"];
    token -> transitions [label="update status"];
}