<?php

namespace App\Controllers\Backend;

use CodeIgniter\HTTP\ResponseInterface;
use CodeIgniter\RESTful\ResourceController;

use App\Models\PromoSetting;
use App\Models\PromoCode;
use App\Models\PromoRedemptionRecord;

helper('promo'); // loads app/Helpers/promo_helper.php


class PromoSettingController extends ResourceController
{
    private $promoSetting;
    private $promoCode;
    private $promoRedemptionRecord;
    protected $db;

    public function __construct()
    {
        $this->promoSetting = new PromoSetting();
        $this->promoCode = new PromoCode();
        $this->promoRedemptionRecord = new PromoRedemptionRecord();
        $this->db = \Config\Database::connect();
    }

    public function index()
    {
        $promoSettingsData = $this->promoSetting->findAll();
        // print_r($promoSettingsData);exit;

        if(empty($promoSettingsData)){
            return $this->respond(['status' => 400, 'result' => 'No data found.']);
        }

        $result = [];

        foreach($promoSettingsData as $key => $value){
            $result[$key] = [
                "id" => $value['id'],
                "title" => $value['title'],
                "status" => $value['status'],
            ];

            $promoCode = $this->promoCode->where('promo_setting_id', $value['id'])->findAll()[0];

            if(!empty($promoCode)){
                $result[$key]['promoCode'] = $promoCode['code'];
                $result[$key]['total_redemption_limit'] = $promoCode['total_redemption_limit'];
                $result[$key]['start_date'] = $promoCode['start_date'];
                $result[$key]['end_date'] = $promoCode['end_date'];

                $count_redemptions = $this->promoRedemptionRecord->where('promo_codes_id', $promoCode['id'])->countAllResults();

                $result[$key]['left_redemption'] = $promoCode['total_redemption_limit'] - $count_redemptions;
            }

        }

        return $this->respond(['status' => 200, 'message' => 'Retrieve Promo Setting Successfully!', 'result' => $result]);
    }

    public function show($id = null)
    {
        $promoSetting = $this->promoSetting->find($id);

        if(empty($promoSetting)){
            return $this->respond(['status' => 400, 'result' => 'No data found.']);
        }
        // print_r(json_decode($promoSetting['promo_setting'], true));exit;
        $promoSettingData = revertPromoSetting(json_decode($promoSetting['promo_setting'], true));
        // print_r($promoSettingData);exit;

        $result = [
            "id" => $promoSetting['id'],
            "promotionType" => $promoSetting['promotion_type'],
            "promotionName" => $promoSetting['title'],
            "promotionDescription" => $promoSetting['description'],

            //promo_setting
            "discountAmount" => $promoSettingData['discountAmount'],
            "discountType" => $promoSettingData['discountType'],
            "getNumber" => $promoSettingData['getNumber'],
            "minimumSpend" => $promoSettingData['minimumSpend'],
            "itemCategory1" => $promoSettingData['itemCategory1'],
            "itemCategoryID1" => $promoSettingData['itemCategoryID1'],
            "itemCategory2" => $promoSettingData['itemCategory2'],
            "itemCategoryID2" => $promoSettingData['itemCategoryID2'],
            "minimumQuantity" => $promoSettingData['minimumQuantity'],
            "everyQuantity" => $promoSettingData['everyQuantity'],
            // "minimumAmount" => $promoSettingData['minimumAmount'],
            "promoType" => $promoSettingData['promoType'],
        ];

        // print_r($result);exit;

        $promoCode = $this->promoCode->where('promo_setting_id', $promoSetting['id'])->findAll()[0];

        $result['promoCodeId'] = $promoCode['id'];
        $result['promotionCode'] = $promoCode['code'];
        $result['usageLimit'] = $promoCode['usage_limit_type'];
        $result['voucherLimitPerCustomer'] = $promoCode['usage_limit'];
        $result['totalRedemptionLimit'] = $promoCode['total_redemption_limit'];
        $result['storeStartDate'] = $promoCode['start_date'];
        $result['storeEndDate'] = $promoCode['end_date'];
        $result['customDayTime'] = json_decode($promoCode['customize_validity'], true);
        $result['applyToDeliveryPickup'] = $promoCode['promo_order_type'];
        // print_r($result);exit;

        $count_redemptions = $this->promoRedemptionRecord->where('promo_codes_id', $promoCode['id'])->countAllResults();

        $result['left_redemption'] = $promoCode['total_redemption_limit'] - $count_redemptions;

        return $this->respond(['status' => 200, 'message' => 'Retrieve Promo Setting Successfully!', 'result' => $result]);
    }

    public function create()
    {
        $validationRules = [
            "promotionType" => "required",
            "promotionName" => "required",
            "promotionDescription" => "permit_empty",
            "usageLimit" => "required",
            "totalRedemptionLimit" => "required",
            "voucherLimitPerCustomer" => "permit_empty",
            "startDate" => "permit_empty",
            "endDate" => "permit_empty",
            "customDayTime" => "permit_empty",
            "applyToDeliveryPickup" => "required",
        ];

        $validation = $this->validate($validationRules);

        if (!$validation) {
            return $this->failValidationErrors($this->validator->getErrors());
        }

        $this->db->transBegin();

        try {
            $applyToDeliveryPickup = $this->request->getVar("applyToDeliveryPickup");
            
            if (!is_array($applyToDeliveryPickup)) {
                throw new \Exception("applyToDeliveryPickup must be an array");
            }
            
            $validOptions = ['delivery', 'pickup', 'dinein'];
            foreach ($applyToDeliveryPickup as $option) {
                if (!in_array($option, $validOptions)) {
                    throw new \Exception("Invalid option in applyToDeliveryPickup: " . $option);
                }
            }
            
            if (empty($applyToDeliveryPickup)) {
                throw new \Exception("applyToDeliveryPickup cannot be empty");
            }

            $minimumSpend = $this->request->getVar("minimumSpend");
            $minimumQuantity = $this->request->getVar("minimumQuantity");
            $everyQuantity = $this->request->getVar("everyQuantity");
            $itemCategory1 = $this->request->getVar("itemCategory1");
            $itemCategoryID1 = $this->request->getVar("itemCategoryID1");

            $discountAmount = $this->request->getVar("discountAmount");
            $discountType = $this->request->getVar("discountType");
            $getNumber = $this->request->getVar("getNumber");
            $itemCategory2 = $this->request->getVar("itemCategory2");
            $itemCategoryID2 = $this->request->getVar("itemCategoryID2");

            $promoType = $this->request->getVar("promoType");

            $promoSetting = [
                "MinimumSpend" => [
                    "type" => 'none',
                    "filter" => [],
                    "amount_type" => '',
                    "amount" => 0
                ],
                "Promo" => [
                    "promo_type" => $promoType,
                    "discount_type" => $discountType,
                    "filter_type" => 'total',
                    "filter" => [],
                    "amount" => 0,
                    "free_item" => []
                ]
            ];

            if (!empty($minimumSpend) || !empty($minimumQuantity) || !empty($everyQuantity)) {
                if (!empty($itemCategory1)) {
                    $promoSetting["MinimumSpend"]["type"] = $itemCategory1;
                    $promoSetting["MinimumSpend"]["filter"] = is_array($itemCategoryID1) ? $itemCategoryID1 : [];
                } else {
                    $promoSetting["MinimumSpend"]["type"] = "total";
                    $promoSetting["MinimumSpend"]["filter"] = [];
                }

                if (!empty($minimumSpend)) {
                    $promoSetting["MinimumSpend"]["amount_type"] = "amount";
                    $promoSetting["MinimumSpend"]["amount"] = floatval($minimumSpend);
                } elseif (!empty($minimumQuantity)) {
                    $promoSetting["MinimumSpend"]["amount_type"] = "quantity";
                    $promoSetting["MinimumSpend"]["amount"] = intval($minimumQuantity);
                } elseif (!empty($everyQuantity)) {
                    $promoSetting["MinimumSpend"]["amount_type"] = "every_quantity";
                    $promoSetting["MinimumSpend"]["amount"] = intval($everyQuantity);
                }
            }

            $promoSetting["Promo"]["promo_type"] = $promoType;

            if ($promoType === "free_item") {
                $promoSetting["Promo"]["discount_type"] = '';
            } else {
                $promoSetting["Promo"]["discount_type"] = $discountType;
            }

            if (!empty($itemCategory2)) {
                $promoSetting["Promo"]["filter_type"] = $itemCategory2;
            } else {
                $promoSetting["Promo"]["filter_type"] = "total";
            }

            if ($promoType === "free_item") {
                $promoSetting["Promo"]["free_item"] = is_array($itemCategoryID2) ? $itemCategoryID2 : [];
                $promoSetting["Promo"]["filter"] = [];
            } else {
                $promoSetting["Promo"]["filter"] = is_array($itemCategoryID2) ? $itemCategoryID2 : [];
                $promoSetting["Promo"]["free_item"] = [];
            }

            if (!empty($discountAmount)) {
                $promoSetting["Promo"]["amount"] = floatval($discountAmount);
            } elseif (!empty($getNumber)) {
                $promoSetting["Promo"]["amount"] = intval($getNumber);
            }

            $promoSettingData = [
                "promotion_type" => $this->request->getVar("promotionType"),
                "title" => $this->request->getVar("promotionName"),
                "description" => $this->request->getVar("promotionDescription"),
                "promo_setting" => json_encode($promoSetting)
            ];

            $id = $this->promoSetting->insert($promoSettingData);
            if(!$id){
                throw new \Exception("Failed to create promotion setting.");
            }

            $promotionCode = $this->request->getVar("promotionCode");

            if(!empty($promotionCode)){
                $isExists = $this->promoCode->where('code', $promotionCode)->find();

                if(!empty($isExists)){
                    throw new \Exception("Promotion code already exists.");
                }
            }

            $promoOrderTypeString = implode(',', $applyToDeliveryPickup);
            
            $promoCodeData = [
                'promo_setting_id' => $id,
                "code" => $promotionCode,
                "usage_limit_type" => $this->request->getVar("usageLimit"),
                "usage_limit" => $this->request->getVar("voucherLimitPerCustomer"),
                "total_redemption_limit" => $this->request->getVar("totalRedemptionLimit"),
                "start_date" => $this->request->getVar("storeStartDate"),
                "end_date" => $this->request->getVar("storeEndDate"),
                "customize_validity" => json_encode($this->request->getVar("customDayTime")),
                "promo_order_type" => $promoOrderTypeString
            ];

            $promoCodeId = $this->promoCode->insert($promoCodeData);
            if(!$promoCodeId){
                throw new \Exception("Failed to create promotion code.");
            }

            $this->db->transCommit();

            return $this->respond([
                'status' => 200, 
                'message' => 'Promotion created successfully.',
                'data' => [
                    'promo_setting_id' => $id,
                    'promo_code_id' => $promoCodeId,
                    'promo_order_type' => $promoOrderTypeString 
                ]
            ]);

        } catch (\Exception $e) {
            $this->db->transRollback();
            log_message('error', 'Promotion creation failed: ' . $e->getMessage());
            return $this->failServerError('Failed to create promotion: '. $e->getMessage());
        }
    }

    public function update($id = null)
    {
        $promoSetting = $this->promoSetting->find($id);

        if(empty($promoSetting)){
            return $this->respond(['status' => 400, 'result' => 'No promotion setting data found.']);
        }

        $validationRules = [
            "promotionType" => "required",
            "promotionName" => "required",
            "promotionDescription" => "permit_empty",
            "usageLimit" => "required",
            "totalRedemptionLimit" => "required",
            "voucherLimitPerCustomer" => "permit_empty",
            "startDate" => "permit_empty",
            "endDate" => "permit_empty",
            "customDayTime" => "permit_empty",
            "applyToDeliveryPickup" => "required",
        ];

        $validation = $this->validate($validationRules);

        if (!$validation) {
            return $this->failValidationErrors($this->validator->getErrors());
        }

        $this->db->transBegin();

        try {

            $applyToDeliveryPickup = $this->request->getVar("applyToDeliveryPickup");
            

            if (!is_array($applyToDeliveryPickup)) {
                throw new \Exception("applyToDeliveryPickup must be an array");
            }
            
            $validOptions = ['delivery', 'pickup', 'dinein'];
            foreach ($applyToDeliveryPickup as $option) {
                if (!in_array($option, $validOptions)) {
                    throw new \Exception("Invalid option in applyToDeliveryPickup: " . $option);
                }
            }
            
            if (empty($applyToDeliveryPickup)) {
                throw new \Exception("applyToDeliveryPickup cannot be empty");
            }

            $minimumSpend = $this->request->getVar("minimumSpend");
            $minimumQuantity = $this->request->getVar("minimumQuantity");
            $everyQuantity = $this->request->getVar("everyQuantity");
            $itemCategory1 = $this->request->getVar("itemCategory1");
            $itemCategoryID1 = $this->request->getVar("itemCategoryID1");

            // print_r($itemCategory1);
            // print_r($itemCategoryID1);
            // exit;

            $discountAmount = $this->request->getVar("discountAmount");
            $discountType = $this->request->getVar("discountType");
            $getNumber = $this->request->getVar("getNumber");
            $itemCategory2 = $this->request->getVar("itemCategory2");
            $itemCategoryID2 = $this->request->getVar("itemCategoryID2");

            $promoType = $this->request->getVar("promoType");

            $promoSetting = [
                "MinimumSpend" => [
                    "type" => 'none',
                    "filter" => [],
                    "amount_type" => '',
                    "amount" => 0
                ],
                "Promo" => [
                    "promo_type" => $promoType,
                    "discount_type" => $discountType,
                    "filter_type" => 'total',
                    "filter" => [],
                    "amount" => 0,
                    "free_item" => []
                ]
            ];

            if (!empty($itemCategory1)) {
                $promoSetting["MinimumSpend"]["type"] = $itemCategory1;
                $promoSetting["MinimumSpend"]["filter"] = is_array($itemCategoryID1) ? $itemCategoryID1 : [];
            } else {
                $promoSetting["MinimumSpend"]["type"] = "total";
                $promoSetting["MinimumSpend"]["filter"] = [];
            }

            if (!empty($minimumSpend)) {
                $promoSetting["MinimumSpend"]["amount_type"] = "amount";
                $promoSetting["MinimumSpend"]["amount"] = floatval($minimumSpend);
            } elseif (!empty($minimumQuantity)) {
                $promoSetting["MinimumSpend"]["amount_type"] = "quantity";
                $promoSetting["MinimumSpend"]["amount"] = intval($minimumQuantity);
            } elseif (!empty($everyQuantity)) {
                $promoSetting["MinimumSpend"]["amount_type"] = "every_quantity";
                $promoSetting["MinimumSpend"]["amount"] = intval($everyQuantity);
            }

            $promoSetting["Promo"]["promo_type"] = $promoType;

            if ($promoType === "free_item") {
                $promoSetting["Promo"]["discount_type"] = '';
            } else {
                $promoSetting["Promo"]["discount_type"] = $discountType;
            }

            if (!empty($itemCategory2)) {
                $promoSetting["Promo"]["filter_type"] = $itemCategory2;
            } else {
                $promoSetting["Promo"]["filter_type"] = "total";
            }

            if ($promoType === "free_item") {
                $promoSetting["Promo"]["free_item"] = is_array($itemCategoryID2) ? $itemCategoryID2 : [];
                $promoSetting["Promo"]["filter"] = [];
            } else {
                $promoSetting["Promo"]["filter"] = is_array($itemCategoryID2) ? $itemCategoryID2 : [];
                $promoSetting["Promo"]["free_item"] = [];
            }

            if (!empty($discountAmount)) {
                $promoSetting["Promo"]["amount"] = floatval($discountAmount);
            } elseif (!empty($getNumber)) {
                $promoSetting["Promo"]["amount"] = intval($getNumber);
            }

            $promoSettingData = [
                "id" => $id,
                "promotion_type" => $this->request->getVar("promotionType"),
                "title" => $this->request->getVar("promotionName"),
                "description" => $this->request->getVar("promotionDescription"),
                "promo_setting" => json_encode($promoSetting)
            ];

            $response = $this->promoSetting->save($promoSettingData);
            if (!$response) {
                throw new \Exception('Failed to update promotion settings.');
            }

            $promoCode = $this->promoCode->where('promo_setting_id', $id)->find()[0];

            if(!$promoCode){
                throw new \Exception("Failed to update promotion code.");
            }

            $promotionCode = $this->request->getVar("promotionCode");
            if(!empty($promotionCode)){
                $isExists = $this->promoCode->where('code', $promotionCode)->where('id !=', $promoCode['id'])->find();

                if(!empty($isExists)){
                    throw new \Exception("Promotion code already exists.");
                }            
            }

            $promoOrderTypeString = implode(',', $applyToDeliveryPickup);
            
            $promoCodeData = [
                'id' => $promoCode['id'],
                'promo_setting_id' => $id,
                'code' => $promotionCode,
                'usage_limit_type' => $this->request->getVar("usageLimit"),
                'usage_limit' => $this->request->getVar("voucherLimitPerCustomer"),
                'total_redemption_limit' => $this->request->getVar("totalRedemptionLimit"),
                'start_date' => $this->request->getVar("storeStartDate"),
                'end_date' => $this->request->getVar("storeEndDate"),
                'customize_validity' => json_encode($this->request->getVar("customDayTime")),
                'promo_order_type' => $promoOrderTypeString
            ];

            $promoCodeResponse = $this->promoCode->save($promoCodeData);
            if (!$promoCodeResponse) {
                throw new \Exception('Failed to update promotion code.');
            }

            $this->db->transCommit();
            
            return $this->respond([
                'status' => 200, 
                'message' => 'Promotion updated successfully.',
                'data' => [
                    'promo_setting_id' => $id,
                    'promo_code_id' => $promoCode['id'],
                    'promo_order_type' => $promoOrderTypeString
                ]
            ]);

        } catch (\Exception $e) {
            $this->db->transRollback();
            log_message('error', 'Promotion update failed: ' . $e->getMessage());
            return $this->failServerError('Failed to update promotion: '. $e->getMessage());
        }
    }


    public function delete($id = null)
    {
        $promoSetting = $this->promoSetting->find($id);

        // print_r($promoSetting);exit;
        if(empty($promoSetting)){
            return $this->respond(['status' => 400, 'result' => 'No promotion setting data found.']);
        }

        $this->promoSetting->delete($id);
        $this->promoCode->where('promo_setting_id', $id)->delete();

        return $this->respond(['status' => 200, 'result' => 'Promotion deleted successfully.']);
    }

    public function promoSettingList(){
        $promo_setting_list = $this->promoSetting->findAll();

        if(empty($promo_setting_list)){
            return $this->fail('No promo setting data found!');
        }

        $data_list = [];

        foreach ($promo_setting_list as $key => $value) {
            $data_list[] = [
                'id' => $value['id'],
                'promotion_type' => $value['promotion_type'],
                'title' => $value['title'],
                'description'=> $value['description'],
                'status' => $value['status'],
                'promo_setting' => $value['promo_setting'],
            ];
        }

        return $this->respond([
            'status'=> 200, 
            'message' => 'Promo setting record found!',
            'data'=> $data_list
        ]);

    }
}