-- Scheduler helpers for running SIMULATE_COMMERCE_ACTIVITY asynchronously.
-- Run as the schema owner after oracle_ecommerce_activity.sql.
-- The schema owner needs the CREATE JOB system privilege.

WHENEVER SQLERROR EXIT SQL.SQLCODE
SET DEFINE OFF
SET SERVEROUTPUT ON SIZE UNLIMITED

CREATE OR REPLACE PROCEDURE create_commerce_activity_job (
    p_job_name                    IN VARCHAR2,
    p_iterations                  IN PLS_INTEGER,
    p_seconds_between_iterations IN NUMBER,
    p_average_rows_per_iteration IN NUMBER
) AS
    l_job_name VARCHAR2(128);
BEGIN
    IF p_job_name IS NULL OR TRIM(p_job_name) IS NULL THEN
        RAISE_APPLICATION_ERROR(-20010, 'p_job_name must not be empty');
    END IF;
    l_job_name := DBMS_ASSERT.SIMPLE_SQL_NAME(UPPER(TRIM(p_job_name)));

    IF p_iterations IS NULL OR p_iterations < 0 THEN
        RAISE_APPLICATION_ERROR(-20011, 'p_iterations must be a non-negative integer');
    END IF;
    IF p_seconds_between_iterations IS NULL OR p_seconds_between_iterations < 0 THEN
        RAISE_APPLICATION_ERROR(-20012, 'p_seconds_between_iterations must be non-negative');
    END IF;
    IF p_average_rows_per_iteration IS NULL OR p_average_rows_per_iteration < 0
       OR p_average_rows_per_iteration > 10000 THEN
        RAISE_APPLICATION_ERROR(-20013, 'p_average_rows_per_iteration must be between 0 and 10000');
    END IF;

    DBMS_SCHEDULER.CREATE_JOB(
        job_name            => l_job_name,
        job_type            => 'STORED_PROCEDURE',
        job_action          => 'SIMULATE_COMMERCE_ACTIVITY',
        number_of_arguments => 3,
        start_date          => SYSTIMESTAMP,
        enabled             => FALSE,
        auto_drop           => FALSE,
        comments            => 'Background e-commerce activity simulation'
    );

    DBMS_SCHEDULER.SET_JOB_ARGUMENT_VALUE(
        job_name => l_job_name,
        argument_position => 1,
        argument_value => TO_CHAR(p_iterations, 'TM9', 'NLS_NUMERIC_CHARACTERS=''.,''')
    );
    DBMS_SCHEDULER.SET_JOB_ARGUMENT_VALUE(
        job_name => l_job_name,
        argument_position => 2,
        argument_value => TO_CHAR(
            p_seconds_between_iterations, 'TM9', 'NLS_NUMERIC_CHARACTERS=''.,'''
        )
    );
    DBMS_SCHEDULER.SET_JOB_ARGUMENT_VALUE(
        job_name => l_job_name,
        argument_position => 3,
        argument_value => TO_CHAR(
            p_average_rows_per_iteration, 'TM9', 'NLS_NUMERIC_CHARACTERS=''.,'''
        )
    );

    DBMS_SCHEDULER.ENABLE(l_job_name);
    DBMS_OUTPUT.PUT_LINE(
        'Enabled Scheduler job ' || l_job_name ||
        ' to run SIMULATE_COMMERCE_ACTIVITY in the background.'
    );
END;
/

CREATE OR REPLACE PROCEDURE list_commerce_activity_jobs AS
    l_jobs_found PLS_INTEGER := 0;
BEGIN
    DBMS_OUTPUT.PUT_LINE(
        RPAD('JOB NAME', 32) || RPAD('STATE', 16) ||
        RPAD('ENABLED', 10) || RPAD('RUNS', 8) ||
        RPAD('FAILURES', 10) || 'LAST START'
    );
    DBMS_OUTPUT.PUT_LINE(RPAD('-', 100, '-'));

    FOR job_rec IN (
        SELECT job_name, state, enabled, run_count, failure_count, last_start_date
        FROM user_scheduler_jobs
        WHERE job_type = 'STORED_PROCEDURE'
          AND job_action = 'SIMULATE_COMMERCE_ACTIVITY'
        ORDER BY job_name
    ) LOOP
        l_jobs_found := l_jobs_found + 1;
        DBMS_OUTPUT.PUT_LINE(
            RPAD(job_rec.job_name, 32) ||
            RPAD(job_rec.state, 16) ||
            RPAD(CASE WHEN job_rec.enabled = 'TRUE' THEN 'YES' ELSE 'NO' END, 10) ||
            RPAD(TO_CHAR(job_rec.run_count), 8) ||
            RPAD(TO_CHAR(job_rec.failure_count), 10) ||
            NVL(
                TO_CHAR(job_rec.last_start_date, 'YYYY-MM-DD HH24:MI:SS TZH:TZM'),
                'never'
            )
        );
    END LOOP;

    IF l_jobs_found = 0 THEN
        DBMS_OUTPUT.PUT_LINE('No SIMULATE_COMMERCE_ACTIVITY Scheduler jobs found.');
    END IF;
END;
/

CREATE OR REPLACE PROCEDURE stop_commerce_activity_job (
    p_job_name IN VARCHAR2
) AS
    l_job_name  VARCHAR2(128);
    l_job_count PLS_INTEGER;
BEGIN
    IF p_job_name IS NULL OR TRIM(p_job_name) IS NULL THEN
        RAISE_APPLICATION_ERROR(-20020, 'p_job_name must not be empty');
    END IF;
    l_job_name := DBMS_ASSERT.SIMPLE_SQL_NAME(UPPER(TRIM(p_job_name)));

    SELECT COUNT(*)
    INTO l_job_count
    FROM user_scheduler_jobs
    WHERE job_name = l_job_name
      AND job_type = 'STORED_PROCEDURE'
      AND job_action = 'SIMULATE_COMMERCE_ACTIVITY';
    IF l_job_count = 0 THEN
        RAISE_APPLICATION_ERROR(-20021, 'No activity Scheduler job named ' || l_job_name);
    END IF;

    DBMS_SCHEDULER.DISABLE(
        name  => l_job_name,
        force => TRUE
    );
    DBMS_OUTPUT.PUT_LINE('Stopped and disabled Scheduler job ' || l_job_name || '.');
END;
/

CREATE OR REPLACE PROCEDURE remove_commerce_activity_job (
    p_job_name IN VARCHAR2
) AS
    l_job_name  VARCHAR2(128);
    l_job_count PLS_INTEGER;
BEGIN
    IF p_job_name IS NULL OR TRIM(p_job_name) IS NULL THEN
        RAISE_APPLICATION_ERROR(-20030, 'p_job_name must not be empty');
    END IF;
    l_job_name := DBMS_ASSERT.SIMPLE_SQL_NAME(UPPER(TRIM(p_job_name)));

    SELECT COUNT(*)
    INTO l_job_count
    FROM user_scheduler_jobs
    WHERE job_name = l_job_name
      AND job_type = 'STORED_PROCEDURE'
      AND job_action = 'SIMULATE_COMMERCE_ACTIVITY';
    IF l_job_count = 0 THEN
        RAISE_APPLICATION_ERROR(-20031, 'No activity Scheduler job named ' || l_job_name);
    END IF;

    DBMS_SCHEDULER.DROP_JOB(
        job_name => l_job_name,
        force    => TRUE
    );
    DBMS_OUTPUT.PUT_LINE('Removed Scheduler job ' || l_job_name || '.');
END;
/

SHOW ERRORS PROCEDURE create_commerce_activity_job
SHOW ERRORS PROCEDURE list_commerce_activity_jobs
SHOW ERRORS PROCEDURE stop_commerce_activity_job
SHOW ERRORS PROCEDURE remove_commerce_activity_job