exports.up = function(knex) {
    return knex.schema
        .createTable('users', function(table) {
            table.increments('user_id').primary()
            table.string('user_name', 32).notNullable()
            table.string('user_email', 90).notNullable()
        })
        .createTable('profiles', function(table) {
            table.increments('profile_id').primary()
            table.integer('user_id').notNullable()
        })
        .createTable('response_keys', function(table) {
            table.increments('response_key_id').primary()
            table.string('response_key_name').notNullable()
            table.string('response_key_description')
        })
        .createTable('responses', function(table) {
            table.increments('response_id').primary()
            table.integer('profile_id').notNullable()
            table.integer('response_key_id').notNullable()
            table.string('val').notNullable()
        })
        .createTable('groupings', function(table) {
            table.increments('grouping_id').primary()
            table.string('grouping_name', 128).notNullable()
            table.string('grouping_type', 128).notNullable() // Don't over normalize
        })
        .createTable('memberships', function(table) {
            table.increments('membership_id').primary()
            table.integer('user_id').notNullable() // From
            table.integer('grouping_id').notNullable() // To
            table.string('membership_type', 128).notNullable() // Don't over normalize
            table.boolean('can_edit').notNullable()
        })
        .createTable('messages', function(table) {
            table.increments('message_id').primary()
            table.integer('user_id').notNullable()
            table.integer('grouping_id').notNullable()
            table.string('message', 255).notNullable()
        })
}

exports.down = function(knex) {
    return knex.schema
        .dropTable('users')
        .dropTable('profiles')
        .dropTable('response_keys')
        .dropTable('responses')
        .dropTable('groupings')
        .dropTable('memberships')
        .dropTable('chats')
        .dropTable('messages')
}