import java.io.FileInputStream;
import java.sql.*;
import java.util.Properties;

public class SimplifyG3Soft3 {
    static final String ALLOW = "ISNULL(CONVERT(int, SESSION_CONTEXT(N'allow_g3soft')), 0) = 1";
    public static void main(String[] args) throws Exception {
        Properties props = new Properties();
        try (FileInputStream in = new FileInputStream(args[0])) { props.load(in); }
        try (Connection conn = DriverManager.getConnection(props.getProperty("url"), props.getProperty("username"), props.getProperty("password"))) {
            conn.setAutoCommit(false);
            run(conn, "IF OBJECT_ID('dbo.v_s_log_audit') IS NOT NULL DROP VIEW dbo.v_s_log_audit");
            run(conn, "IF OBJECT_ID('dbo.v_b_user') IS NOT NULL DROP VIEW dbo.v_b_user");

            // find & drop default constraint on b_is_system
            String defCons = null;
            try (Statement st = conn.createStatement(); ResultSet rs = st.executeQuery(
                "SELECT dc.name FROM sys.default_constraints dc " +
                "WHERE dc.parent_object_id = OBJECT_ID('b_user') AND dc.parent_column_id = " +
                "(SELECT column_id FROM sys.columns WHERE object_id=OBJECT_ID('b_user') AND name='b_is_system')")) {
                if (rs.next()) defCons = rs.getString(1);
            }
            if (defCons != null) run(conn, "ALTER TABLE dbo.b_user DROP CONSTRAINT [" + defCons + "]");

            run(conn, "IF EXISTS (SELECT 1 FROM sys.columns WHERE object_id=OBJECT_ID('b_user') AND name='b_is_system') " +
                      "ALTER TABLE dbo.b_user DROP COLUMN b_is_system");
            run(conn, "CREATE VIEW dbo.v_b_user AS SELECT * FROM dbo.b_user WHERE b_account <> N'g3soft' OR " + ALLOW);
            run(conn, "CREATE VIEW dbo.v_s_log_audit AS SELECT * FROM dbo.s_log_audit WHERE b_operator_id IN (SELECT b_id FROM dbo.v_b_user) OR " + ALLOW);
            conn.commit();
            System.out.println("COMMITTED.");

            System.out.println("\n== b_user columns ==");
            dump(conn, "SELECT name FROM sys.columns WHERE object_id=OBJECT_ID('b_user') ORDER BY column_id");
            System.out.println("\n== v_b_user WITHOUT ctx ==");
            dump(conn, "SELECT b_id, b_account FROM v_b_user ORDER BY b_id");
            try (Statement st = conn.createStatement()) { st.execute("EXEC sys.sp_set_session_context @key=N'allow_g3soft', @value=1"); }
            System.out.println("== v_b_user WITH ctx=1 ==");
            dump(conn, "SELECT b_id, b_account FROM v_b_user ORDER BY b_id");
            try (Statement st = conn.createStatement()) { st.execute("EXEC sys.sp_set_session_context @key=N'allow_g3soft', @value=NULL"); }
            System.out.println("\n== views ==");
            dump(conn, "SELECT name FROM sys.views WHERE name LIKE 'v_%' ORDER BY name");
        }
    }
    static void run(Connection conn, String sql) throws SQLException {
        try (Statement st = conn.createStatement()) { st.execute(sql); }
        System.out.println("OK: " + sql.replaceAll("\\s+", " ").trim().substring(0, Math.min(95, sql.replaceAll("\\s+", " ").trim().length())));
    }
    static void dump(Connection conn, String sql) throws SQLException {
        try (Statement st = conn.createStatement(); ResultSet rs = st.executeQuery(sql)) {
            ResultSetMetaData m = rs.getMetaData();
            while (rs.next()) {
                StringBuilder sb = new StringBuilder("  ");
                for (int i = 1; i <= m.getColumnCount(); i++) {
                    if (i > 1) sb.append(" | ");
                    sb.append(m.getColumnName(i)).append("=").append(rs.getObject(i));
                }
                System.out.println(sb);
            }
        }
    }
}