<?php

defined('BASEPATH') or exit('No direct script access allowed');

include_once(APPPATH . 'libraries/Stripe_core.php');

class Stripe_subscriptions extends Stripe_core
{
    public function __construct()
    {
        parent::__construct();
    }

    public function get_upcoming_invoice($subscription_id)
    {
        return \Stripe\Invoice::upcoming(['subscription' => $subscription_id]);
    }

    public function get_plans()
    {
        $hasMore       = true;
        $data          = null;
        $startingAfter = null;
        do {
            $plans = \Stripe\Plan::all(
                array_merge(['limit' => 100, 'expand' => ['data.product']], $startingAfter ? ['starting_after' => $startingAfter] : [])
            );

            if (is_null($data)) {
                $data = $plans;
            } else {
                $data->data = array_merge($data->data, $plans->data);
            }

            $startingAfter = $data->data[count($data->data) - 1]->id ?? null;
            $hasMore       = $plans['has_more'];
            $data['has_more'] = $hasMore;
        } while ($hasMore);

        return $data;
    }

    public function get_plan($id)
    {
        return \Stripe\Plan::retrieve($id);
    }

    public function get_product($id)
    {
        return \Stripe\Product::retrieve($id);
    }

    public function get_subscription($data)
    {
        return \Stripe\Subscription::retrieve($data);
    }

    public function cancel($id)
    {
        $sub = $this->get_subscription($id);
        $sub->cancel();
    }

    public function cancel_at_end_of_billing_period($id)
    {
        $sub = $this->get_subscription($id);

        \Stripe\Subscription::update($id, [
            'cancel_at_period_end' => true,
        ]);

        return $sub->current_period_end;
    }

    public function resume($id, $plan_id)
    {
        $stripeSubscription = $this->get_subscription($id);

        \Stripe\Subscription::update($id, [
        'cancel_at_period_end' => false,
        'items'                => [
            [
                'id'   => $stripeSubscription->items->data[0]->id,
                'plan' => $plan_id,
            ],
        ],
    ]);
    }

    public function pause()
    {
        $sub = $this->get_subscription($id);
        $sub->cancel();
    }

    public function update_subscription($subscription_id, $update_values, $db_subscription, $prorate = false)
    {
        if (empty($subscription_id)) {
            return false;
        }

        if ($update_values['stripe_tax_id'] != $db_subscription->stripe_tax_id
                    || $update_values['stripe_tax_id_2'] != $db_subscription->stripe_tax_id_2
                    || $update_values['quantity'] != $db_subscription->quantity
                    || $update_values['stripe_plan_id'] != $db_subscription->stripe_plan_id
                ) {
            $stripeSubscription = $this->get_subscription($subscription_id);

            if (empty($update_values['stripe_tax_id']) && empty($update_values['stripe_tax_id_2'])) {
                $stripeSubscription->default_tax_rates = null;
            } else {
                $taxRates = null;
                foreach (['stripe_tax_id', 'stripe_tax_id_2'] as $key) {
                    if (!empty($update_values[$key])) {
                        if (!is_array($taxRates)) {
                            $taxRates = [];
                        }
                        $taxRates[] = $update_values[$key];
                    }
                }
                $stripeSubscription->default_tax_rates = $taxRates;
            }


            // Causing issue when changin both plan/items and quantity
            if ($update_values['quantity'] != $db_subscription->quantity && $update_values['stripe_plan_id'] == $db_subscription->stripe_plan_id) {
                $stripeSubscription->quantity = $update_values['quantity'];
            }

            if ($update_values['stripe_plan_id'] != $db_subscription->stripe_plan_id) {
                $items = [
                            [
                                'id'   => $stripeSubscription->items->data[0]->id,
                                'plan' => $update_values['stripe_plan_id'],
                            ],
                         ];

                // If quantity is changed, update quantity too
                if ($update_values['quantity'] != $db_subscription->quantity) {
                    $items[0]['quantity'] = $update_values['quantity'];
                }

                $stripeSubscription->items = $items;
            }

            $stripeSubscription->prorate = $prorate;
            $stripeSubscription->save();
        }
    }

    public function subscribe($customer_id, $params = [])
    {
        return \Stripe\Subscription::create(array_merge([
            'customer' => $customer_id,
        ], $params));
    }
}
