exports.up = function (knex) {
    return knex.schema.createTable("stat_hourly", function (table) {
        table.increments("id");
        table.comment("This table contains the hourly aggregate statistics for each monitor");
        table
            .integer("monitor_id")
            .unsigned()
            .notNullable()
            .references("id")
            .inTable("monitor")
            .onDelete("CASCADE")
            .onUpdate("CASCADE");
        table.integer("timestamp").notNullable().comment("Unix timestamp rounded down to the nearest hour");
        table.float("ping").notNullable().comment("Average ping in milliseconds");
        table.float("ping_min").notNullable().defaultTo(0).comment("Minimum ping during this period in milliseconds");
        table.float("ping_max").notNullable().defaultTo(0).comment("Maximum ping during this period in milliseconds");
        table.smallint("up").notNullable();
        table.smallint("down").notNullable();

        table.unique(["monitor_id", "timestamp"]);
    });
};

exports.down = function (knex) {
    return knex.schema.dropTable("stat_hourly");
};