<cfsetting showdebugoutput="false">
<cfsetting enablecfoutputonly="true">
<cfcontent type="application/json; charset=utf-8" reset="true">

<cfscript>
// Check for an active (uncompleted) chat task at a business
// Input: BusinessID, ServicePointID (optional), UserID (optional)
// Output: { OK: true, HAS_ACTIVE_CHAT: true/false, TASK_ID: ... }

function apiAbort(required struct payload) {
    writeOutput(serializeJSON(payload));
    abort;
}

function readJsonBody() {
    var raw = getHttpRequestData().content;
    if (isNull(raw)) raw = "";
    if (!len(trim(raw))) return {};
    try {
        var data = deserializeJSON(raw);
        if (isStruct(data)) return data;
    } catch (any e) {}
    return {};
}

try {
    data = readJsonBody();
    businessID = val(structKeyExists(data, "BusinessID") ? data.BusinessID : 0);
    servicePointID = val(structKeyExists(data, "ServicePointID") ? data.ServicePointID : 0);
    userID = val(structKeyExists(data, "UserID") ? data.UserID : 0);

    if (businessID == 0) {
        apiAbort({ "OK": false, "ERROR": "missing_params", "MESSAGE": "BusinessID is required" });
    }

    // Look for any active chat task at this business (TaskTypeID = 2, not completed)
    // Priority order:
    // 1. Chats that are claimed (worker is responding)
    // 2. Chats that have messages (ongoing conversation)
    // 3. Most recently created chat
    qChat = queryExecute("
        SELECT t.TaskID, t.TaskTitle, t.TaskSourceID,
               (SELECT COUNT(*) FROM ChatMessages m WHERE m.TaskID = t.TaskID) as MessageCount
        FROM Tasks t
        WHERE t.TaskBusinessID = :businessID
          AND t.TaskTypeID = 2
          AND t.TaskCompletedOn IS NULL
        ORDER BY
          CASE WHEN t.TaskClaimedByUserID > 0 THEN 0 ELSE 1 END,
          (SELECT COUNT(*) FROM ChatMessages m WHERE m.TaskID = t.TaskID) DESC,
          t.TaskAddedOn DESC
        LIMIT 1
    ", {
        businessID: { value: businessID, cfsqltype: "cf_sql_integer" }
    }, { datasource: "payfrit" });

    if (qChat.recordCount > 0) {
        apiAbort({
            "OK": true,
            "HAS_ACTIVE_CHAT": true,
            "TASK_ID": qChat.TaskID,
            "TASK_TITLE": qChat.TaskTitle
        });
    } else {
        apiAbort({
            "OK": true,
            "HAS_ACTIVE_CHAT": false,
            "TASK_ID": 0,
            "TASK_TITLE": ""
        });
    }

} catch (any e) {
    apiAbort({
        "OK": false,
        "ERROR": "server_error",
        "MESSAGE": e.message
    });
}
</cfscript>