#!/bin/bash

# File paths for output
OUTPUT_FILE="/tmp/apex_smtp_settings.tmp"
PDB_LIST_FILE="/tmp/pdb_list.tmp"
> "$OUTPUT_FILE" # Clear the output file before starting
touch $OUTPUT_FILE
chown oracle $OUTPUT_FILE

# Function to execute the SMTP Settings query in a specific container
run_query() {
    local container_name="$1"
    su - oracle -s /bin/bash -c "
        sqlplus -s / as sysdba <<EOF >> \"$OUTPUT_FILE\"
        whenever sqlerror exit sql.sqlcode;
        SET ECHO ON
        SET HEADING ON
        SET UNDERLINE '='
        SET FEEDBACK OFF
        SET LINESIZE 150
        SET PAGESIZE 100
        COLUMN PARAMETER_NAME FORMAT A20
        COLUMN PARAMETER_VALUE FORMAT A50

        -- Switch to the specified container
        ALTER SESSION SET CONTAINER = $container_name;

        -- Print the container name for clarity
        PROMPT APEX SMTP Settings for container: $container_name;

        SELECT 
            'SMTP_HOST_ADDRESS' AS PARAMETER_NAME, APEX_INSTANCE_ADMIN.GET_PARAMETER('SMTP_HOST_ADDRESS') AS PARAMETER_VALUE
        FROM 
            DUAL
        UNION ALL
        SELECT 
            'SMTP_PORT', APEX_INSTANCE_ADMIN.GET_PARAMETER('SMTP_HOST_PORT')
        FROM 
            DUAL
        UNION ALL
        SELECT 
            'SMTP_USERNAME', APEX_INSTANCE_ADMIN.GET_PARAMETER('SMTP_USERNAME')
        FROM 
            DUAL
        UNION ALL
        SELECT 
            'SMTP_PASSWORD' AS PARAMETER_NAME, 
            CASE 
                WHEN APEX_INSTANCE_ADMIN.GET_PARAMETER('SMTP_PASSWORD') IS NOT NULL THEN 'ABCDEFGHIJKLM'
                ELSE NULL
            END AS PARAMETER_VALUE
        FROM 
            DUAL
        UNION ALL
        SELECT 
            'SMTP_TLS_MODE', APEX_INSTANCE_ADMIN.GET_PARAMETER('SMTP_TLS_MODE')
        FROM 
            DUAL;
        exit;
EOF
    "
}

# Get a list of all PDBs, excluding PDB$SEED, and write to a temporary file
su - oracle -s /bin/bash -c "
    sqlplus -s / as sysdba <<EOF
    set heading off
    set feedback off
    set pagesize 0
    spool $PDB_LIST_FILE
    SELECT NAME FROM v\\\$pdbs WHERE NAME NOT IN ('PDB\\\$SEED');
    spool off
    exit;
EOF
"

# Verify that the PDB_LIST_FILE was created and contains data
if [[ -f "$PDB_LIST_FILE" && -s "$PDB_LIST_FILE" ]]; then
    # Read each valid PDB name from the temporary file
    while IFS= read -r PDB; do
        PDB=$(echo "$PDB" | xargs)  # Trim any leading/trailing whitespace
        if [[ -n "$PDB" ]]; then
            echo "Gathering APEX SMTP Settings for PDB: $PDB..." >> "$OUTPUT_FILE"
            run_query "$PDB"
        fi
    done < "$PDB_LIST_FILE"
else
    echo "No PDBs found or could not access v\$pdbs view" >> "$OUTPUT_FILE"
fi

cat "$OUTPUT_FILE"
# Clean up the temporary file
rm -f "$PDB_LIST_FILE"