<?php
/*
 SPDX-License-Identifier: AGPL-3.0-only
 SPDX-FileCopyrightText: © 2024 Millions Missing FRANCE <info@millionsmissing.fr>
 */

namespace MillionsMissingFrance\FreescoutRestrictedCustomers\Http\Controllers;

use App\Conversation;
use Modules\Crm\Entities\CustomerField;
use Modules\Crm\Entities\CustomerCustomerField;
use Validator;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Routing\Controller;
use Modules\Crm\Http\Controllers\CrmController as BaseCrmController;
use MillionsMissingFrance\FreescoutRestrictedCustomers\Customer;
use MillionsMissingFrance\FreescoutRestrictedCustomers\Email;
use MillionsMissingFrance\FreescoutRestrictedCustomers\Mailbox;

class CrmController extends BaseCrmController {
	public function createCustomer(Request $request) {
		$customer = new Customer();

		// Get the list of Mailboxes the current User has access to.
		$user = auth()->user();
		$mailboxes = $user->mailboxesCanView();

		return view('freescout-restricted-customers::create_customer', [
			'customer'  => $customer,
			'mailboxes' => $mailboxes,
			'emails'    => [''],
		]);
	}

	public function createCustomerSave(Request $request) {
		// TODO: Find a way to call parent::createCustomerSave while only overriding the Customer class,
		//       instead of overriding the whole method here.
		$validator = Validator::make($request->all(), [
			'first_name' => 'nullable|string|max:255|required_without:emails.0',
			'last_name'  => 'nullable|string|max:255',
			'city'       => 'nullable|string|max:255',
			'state'      => 'nullable|string|max:255',
			'zip'        => 'nullable|string|max:12',
			'country'    => 'nullable|string|max:2',
			//'emails'     => 'array|required_without:first_name',
			//'emails.1'   => 'nullable|email|required_without:first_name',
			'emails.*'   => 'nullable|email|distinct|required_without:first_name',
		]);
		$validator->setAttributeNames([
			//'emails.1'   => __('Email'),
			'emails.*'   => __('Email'),
		]);

		// Check email uniqueness.
		$fail = false;
		$mailbox = Mailbox::find($request->mailbox);
		foreach ($request->emails as $i => $email) {
			$sanitized_email = Email::sanitizeEmail($email);
			if ($sanitized_email) {
				$email_exists = Email::alreadyExistsInMailbox($mailbox, $sanitized_email);

				if ($email_exists) {
					$validator->getMessageBag()->add('emails.'.$i, __('A customer with this email already exists.'));
					$fail = true;
				}
			}
		}

		if ($fail || $validator->fails()) {
			return redirect()->route('freescout-restricted-customers.create_customer')
					->withErrors($validator)
					->withInput();
		}

		$customer = new Customer();

		$customer->setData($request->all());
		$customer->save();
		$customer->syncEmails($request->emails);
		\Eventy::action('customer.created', $customer);

		\Session::flash('flash_success_unescaped', __('Customer saved successfully.'));

		\Session::flash('customer.updated', 1);

		// Create customer.
		if ($customer->id) {
			return redirect()->route('customers.update', ['id' => $customer->id]);
		} else {
			// Something went wrong.
			return $this->createCustomer($request);
		}
	}

	/**
	 * Ajax controller.
	 */
	public function ajax(Request $request) {
		// TODO: Find a way to call parent::ajax while only overriding the Customer class,
		//       instead of overriding the whole method here.
		$response = [
			'status' => 'error',
			'msg'    => '', // this is error message
		];

		switch ($request->action) {

			// Delete customer.
		case 'delete_customer':
			$has_conversations = Conversation::where('customer_id', $request->customer_id)->first();

			if ($has_conversations) {
				$response['msg'] = __("This customer has conversations. In order to delete the customer you need to completely delete all customer's conversations first.");
			}
			if (!$response['msg']) {
				$customer = Customer::find($request->customer_id);
				if ($customer) {
					$customer->deleteCustomer();
					$response['msg_success'] = __('Customer deleted');
					$response['status'] = 'success';
				} else {
					$response['msg'] = __('Customer not found');
				}
			}
			break;

		case 'delete_without_conv':
			// Delete customers by bunches.
			do {
				$customers = $this->getCustomersWithoutConvQuery()
					  ->limit(100)
					  ->get();

				foreach ($customers as $customer) {
					$customer->deleteCustomer();
				}
			} while(count($customers));

			$response['msg_success'] = __('Customers deleted');
			$response['status'] = 'success';
			break;

		default:
			$response['msg'] = 'Unknown action';
			break;
		}

		if ($response['status'] == 'error' && empty($response['msg'])) {
			$response['msg'] = 'Unknown error occured';
		}

		return \Response::json($response);
	}

	/**
	 * Ajax controller.
	 */
	public function ajaxAdmin(Request $request) {
		// TODO: Find a way to call parent::ajaxAdmin while only overriding the Customer class,
		//       instead of overriding the whole method here.
		$response = [
			'status' => 'error',
			'msg'    => '', // this is error message
		];

		switch ($request->action) {

			// Create/update saved reply
		case 'customer_field_create':
		case 'customer_field_update':

			// if (!$user->isAdmin()) {
			//     $response['msg'] = __('Not enough permissions');
			// }

			if (!$response['msg']) {
				$name = $request->name;

				if (!$name) {
					$response['msg'] = __('Name is required');
				}
			}

			// Check unique name.
			if (!$response['msg']) {
				$name_exists = CustomerField::where('name', $name);

				if ($request->action == 'customer_field_update') {
					$name_exists->where('id', '!=', $request->customer_field_id);
				}
				$name_exists = $name_exists->first();

				if ($name_exists) {
					$response['msg'] = __('A Customer Field with this name already exists.');
				}
			}

			if (!$response['msg']) {

				if ($request->action == 'customer_field_update') {
					$customer_field = CustomerField::find($request->customer_field_id);
					if (!$customer_field) {
						$response['msg'] = __('Customer Field not found');
					}
				} else {
					$customer_field = new CustomerField();
					$customer_field->setSortOrderLast();
				}

				if (!$response['msg']) {
					//$customer_field->mailbox_id = $mailbox->id;
					$customer_field->name = $name;
					if ($request->action != 'customer_field_update') {
						$customer_field->type = $request->type;
					}
					if ($customer_field->type == CustomerField::TYPE_DROPDOWN) {

						if ($request->action == 'customer_field_create') {
							$options = [];
							$options_tmp = preg_split('/\r\n|[\r\n]/', $request->options ?? '');
							// Remove empty
							$option_index = 1;
							foreach ($options_tmp as $i => $value) {
								$value = trim($value);
								if ($value) {
									$options[$option_index] = $value;
									$option_index++;
								}
							}
							if (empty($options)) {
								$options = [1 => ''];
							}
						} else {
							$options = $request->options;
						}

						$customer_field->options = $options;

						// Remove values.
						if ($customer_field->id) {
							CustomerCustomerField::where('customer_field_id', $customer_field->id)
								->whereNotIn('value', array_keys($request->options))
								->delete();
						}
					} elseif (isset($request->options)) {
						$customer_field->options = $request->options;
					} else {
						$customer_field->options = '';
					}
					$customer_field->required = $request->filled('required');
					$customer_field->display = $request->filled('display');
					$customer_field->conv_list = $request->filled('conv_list');
					$customer_field->customer_can_view = $request->filled('customer_can_view');
					$customer_field->customer_can_edit = $request->filled('customer_can_edit');
					$customer_field->save();

					$response['id']     = $customer_field->id;
					$response['name']   = $customer_field->name;
					$response['required']   = (int)$customer_field->required;
					$response['display']   = (int)$customer_field->display;
					$response['conv_list']   = (int)$customer_field->conv_list;
					$response['customer_can_view']   = (int)$customer_field->customer_can_view;
					$response['customer_can_edit']   = (int)$customer_field->customer_can_edit;
					$response['status'] = 'success';

					if ($request->action == 'customer_field_update') {
						$response['msg_success'] = __('Customer field updated');
					} else {
						// Flash
						\Session::flash('flash_success_floating', __('Customer field created'));
					}
				}
			}
			break;

			// Delete
		case 'customer_field_delete':

			// if (!$user->isAdmin()) {
			//     $response['msg'] = __('Not enough permissions');
			// }

			if (!$response['msg']) {
				$customer_field = CustomerField::find($request->customer_field_id);

				if (!$customer_field) {
					$response['msg'] = __('Customer Field not found');
				}
			}

			if (!$response['msg']) {
				\Eventy::action('customer_field.before_delete', $customer_field);
				$customer_field->delete();

				// Delete links to customers;
				CustomerCustomerField::where('customer_field_id', $request->customer_field_id)->delete(); 

				$response['status'] = 'success';
				$response['msg_success'] = __('Customer Field deleted');

				\Eventy::action('customer_field.after_delete', $request->customer_field_id);
			}
			break;

			// Update saved reply
		case 'customer_field_update_sort_order':

			// if (!$user->isAdmin()) {
			//     $response['msg'] = __('Not enough permissions');
			// }

			if (!$response['msg']) {

				$customer_fields = CustomerField::whereIn('id', $request->customer_fields)->select('id', 'sort_order')->get();

				if (count($customer_fields)) {
					foreach ($request->customer_fields as $i => $request_customer_field_id) {
						foreach ($customer_fields as $customer_field) {
							if ($customer_field->id != $request_customer_field_id) {
								continue;
							}
							$customer_field->sort_order = $i+1;
							$customer_field->save();
						}
					}
					$response['status'] = 'success';
				}
			}
			break;

			// Parse CSV before importing.
		case 'import_parse':
			if (!$request->hasFile('file') || !$request->file('file')->isValid() || !$request->file) {
				$response['msg'] = __('Error occurred uploading file');
			}

			if (!$response['msg']) {
				try {
					$csv = $this->readCsv($request->file('file')->getPathName(), $request->separator, $request->enclosure, $request->encoding);
				} catch (\Exception $e) {
					$response['msg'] = __('Error occurred').': '.$e->getMessage();
				}

				if (!$response['msg'] && $csv && is_array($csv)) {
					$response['cols'] = [];
					foreach ($csv as $r => $row) {
						if ($request->skip_header && $r == 0) {
							continue;
						}
						foreach ($row as $c => $value) {
							if (!empty($response['cols'][$c])
								&& $response['cols'][$c] != __('Column :number', ['number' => $c+1])
							) {
								continue;
							}
							if ($request->skip_header) {
								if ($r == 0) {
									if (isset($csv[1][$c]) && $csv[1][$c] != '') {
										$response['cols'][$c] = $value . ' ('.$csv[1][$c].')';
									} elseif ($value != '') {
										$response['cols'][$c] = $value;
									} else {
										$response['cols'][$c] = __('Column :number', ['number' => $c+1]);
									}
								} elseif (isset($csv[0][$c]) && $value) {
									$response['cols'][$c] = $csv[0][$c] . ' ('.$value.')';
								} elseif ($value != '') {
									$response['cols'][$c] = $value;
								} else {
									$response['cols'][$c] = __('Column :number', ['number' => $c+1]);
								}
							} elseif ($value != '') {
								$response['cols'][$c] = $value;
							} else {
								$response['cols'][$c] = __('Column :number', ['number' => $c+1]);
							}
						}
					}
				}
				if (!$response['msg']) {
					if (!empty($response['cols'])) {
						$response['status'] = 'success';
					} else {
						$response['msg'] = __('Could not parse CSV file.');
					}
				}
			}
			break;

			// Import.
		case 'import_import':
			if (!$request->hasFile('file') || !$request->file('file')->isValid() || !$request->file) {
				$response['msg'] = __('Error occurred uploading file');
			}

			if (!$response['msg']) {
				try {
					$csv = $this->readCsv($request->file('file')->getPathName(), $request->separator, $request->enclosure, $request->encoding);
					$imported = 0;
					$errors = [];
					$email_conflicts = [];
					if ($csv && is_array($csv)) {
						foreach ($csv as $r => $row) {
							if ($request->skip_header && $r == 0) {
								continue;
							}
							$data = $this->importParseRow($row, json_decode($request->mapping, true));

							try {
								if (!empty($data['emails'])) {
									// Try to find customers with emails.
									// If found one - update.
									// If found more than one customer - it's a conflict.
									$customers_count = 0;
									$customer_email = '';
									$customer_customer = null;
									foreach ($data['emails'] as $email) {
										$customer = Customer::getByEmail($email);
										if ($customer) {
											$customer_email = $email;
											$customer_customer = $customer;
											$customers_count++;
										}
									}
									if ($customers_count > 1) {
										$email_conflicts[] = (int)($r+1);
									} elseif ($customers_count == 1 && $customer_customer) {
										// Update existing customer.
										$imported++;
										$customer_customer->setData($this->prepareEmails($data), true, true);
									} else {
										$customer_customer = Customer::create($data['emails'][0], $this->prepareEmails($data));
										if ($customer_customer) {
											$imported++;
										}
									}
								} else {
									// Create without email.
									if (!empty($data['first_name'])) {
										$customer_customer = Customer::createWithoutEmail($this->prepareEmails($data));
										if ($customer_customer) {
											$imported++;
										}
									} else {
										$errors[] = '#'.($r+1);
									}
								}
								// Set photo.
								if (!empty($data['photo_url']) && $customer_customer) {
									try {
										$customer_customer->setPhotoFromRemoteFile($data['photo_url']);
										$customer_customer->save();
									} catch (\Exception $e) {

									}
								}
							} catch (\Exception $e) {
								$errors[] = '#'.($r+1);
							}
						}
					}
					// if ($imported) {
					//     $flash_type = 'flash_success_floating';
					// } else {
					//     $flash_type = 'flash_error_floating';
					// }

					$response['result_html'] = __('Imported or updated: :imported customers.', ['imported' => $imported]);
					if (count($errors)) {
						$response['result_html'] .= '<br/>'.__('Could not import the following CSV rows as they contain not enough data: :errors.', ['errors' => implode(', ', $errors)]);
					}
					if (count($email_conflicts)) {
						$response['result_html'] .= '<br/>'.__('Could not import the following CSV rows as emails specified in those rows belong to different existing customers: :email_conflicts.', ['email_conflicts' => implode(', ', $email_conflicts)]);
					}
					// \Session::flash($flash_type, __(':imported customer(s) imported, :errors error(s) occurred', ['imported' => $imported, 'errors' => $errors]));
					// \Session::reflash();
				} catch (\Exception $e) {
					$response['msg'] = __('Error occurred').': '.$e->getMessage();
				}

				if (!$response['msg'] && $csv) {
					$response['status'] = 'success';
				}
			}
			break;

		default:
			$response['msg'] = 'Unknown action';
			break;
		}

		if ($response['status'] == 'error' && empty($response['msg'])) {
			$response['msg'] = 'Unknown error occured';
		}

		return \Response::json($response);
	}

	public function importParseRow($row, $mapping) {
		// TODO: Find a way to call parent::importParseRow while only overriding the Customer class,
		//       instead of overriding the whole method here.
		$data = [];
		foreach ($mapping as $field_name => $field_row_i) {
			if (!isset($row[$field_row_i])) {
				continue;
			}
			$data[$field_name] = $row[$field_row_i];
			$data_value = $data[$field_name];

			switch ($field_name) {
			case 'emails':
			case 'phones':
			case 'websites':
			case 'social_profiles':
				$data[$field_name] = explode(',', $data[$field_name]);
				if (is_array($data[$field_name]) 
					&& count($data[$field_name]) == 1
					&& isset($data[$field_name][0])
					&& empty($data[$field_name][0])
				) {
					unset($data[$field_name][0]);
				}
				break;
			}

			if ($field_name == 'social_profiles' && is_array($data[$field_name])) {
				// Social profiles.
				foreach ($data[$field_name] as $i => $value) {
					preg_match("/^([^:]+):(.*)/", $value, $m);
					if (!empty($m[1]) && !empty($m[2])) {
						$social_name = $m[1];
						if (array_search($social_name, Customer::$social_type_names)) {
							$data[$field_name][$i] = [
								'value' => $m[2],
								'type' => array_search($social_name, Customer::$social_type_names),
							];
						}
					}
				}
			} elseif ($field_name == 'country') {
				// Country.
				if (array_search($data[$field_name], Customer::$countries)) {
					$data[$field_name] = array_search($data[$field_name], Customer::$countries);
				}
				$data[$field_name] = strtoupper(mb_substr($data[$field_name], 0, 2));
			} elseif (\Str::startsWith($field_name, CustomerField::NAME_PREFIX)) {
				// Custom field.
				$value = $data[$field_name];

				$field_id = preg_replace("/^".CustomerField::NAME_PREFIX."/", '', $field_name);
				$field = CustomerField::find($field_id);

				if ($field) {
					$data[$field_name] = CustomerField::sanitizeValue($value, $field);
				}
			}
		}

		return $data;
	}

	public function getCustomersWithoutConvQuery() {
		// TODO: Find a way to call parent::getCustomersWithoutConvQuery while only overriding the Customer class,
		//       instead of overriding the whole method here.
		return Customer::select('customers.*')
			->leftJoin('conversations', function ($join) {
				$join->on('conversations.customer_id', '=', 'customers.id');
			})
			->leftJoin('threads', function ($join) {
				$join->on('threads.created_by_customer_id', '=', 'customers.id');
			})
			->where('conversations.customer_id', null)
			->where('threads.created_by_customer_id', null);
	}

	/**
	 * Export.
	 */
	public function export(Request $request) {
		// TODO: Find a way to call parent::export while only overriding the Customer class,
		//       instead of overriding the whole method here.
		$fields = $request->fields ?? [];
		$export_emails = false;

		$exportable_fields = \Crm::getExportableFields();

		$fields_regular = [];

		foreach ($fields as $i => $field_name) {
			if (array_key_exists($field_name, $exportable_fields)) {
				if (!preg_match("/^".CustomerField::NAME_PREFIX."/", $field_name)) {
					$fields_regular[] = $field_name;
				}
			} else {
				unset($fields[$i]);
			}
			if ($field_name == 'emails') {
				$export_emails = true;
				if (\Helper::isMySql()) {
					$fields_regular[count($fields_regular)-1] = \DB::raw("GROUP_CONCAT(emails.email SEPARATOR ', ') as emails");
				} else {
					$fields_regular[count($fields_regular)-1] = \DB::raw("string_agg(emails.email, ', ') as emails");
				}
			}
		}

		$results = [];

		if (count($fields_regular)) {

			if (!in_array('customers.id', $fields_regular)) {
				$fields_regular[] = 'customers.id';
			}

			if ($export_emails) {
				$query = Customer::select($fields_regular)
					->leftJoin('emails', function ($join) {
						$join->on('emails.customer_id', '=', 'customers.id');
					})
					->groupby('customers.id');
			} else {
				$query = Customer::select($fields_regular);
			}

			$results = $query->get()->toArray();
		}

		// Add customer fields.
		$fields_cf = [];
		foreach ($fields as $field_name) {
			if (preg_match("/^".CustomerField::NAME_PREFIX."/", $field_name)) {
				$fields_cf[] = str_replace(CustomerField::NAME_PREFIX, '', $field_name);
			}
		}
		if (count($fields_cf)) {
			$customer_fields = CustomerCustomerField::whereIn('customer_field_id', $fields_cf)
				->get();

			foreach ($results as $i => $row) {
				foreach ($fields_cf as $cf_id) {
					$results[$i][CustomerField::NAME_PREFIX.$cf_id] = '';
					foreach ($customer_fields as $cf_row) {
						if ($cf_row->customer_id == $row['id'] && $cf_row->customer_field_id == $cf_id) {
							$results[$i][CustomerField::NAME_PREFIX.$cf_id] = $cf_row->value;
							break;
						}
					}
				}
			}
		}

		foreach ($results as $i => $row) {
			if (!in_array('customers.id', $fields) && isset($row['id'])) {
				unset($results[$i]['id']);
			}
			if (!empty($row['photo_url'])) {
				$results[$i]['photo_url'] = Customer::getPhotoUrlByFileName($row['photo_url']);
			}
			if (!empty($row['phones'])) {
				$phones = json_decode($row['phones'], true);
				$row['phones'] = '';
				$phones_list = [];
				if (is_array($phones) && !empty($phones)) {
					foreach ($phones as $phone) {
						$phones_list[] = $phone['value'];
					}
					$results[$i]['phones'] = implode(', ', $phones_list);
				}
			}
			if (!empty($row['websites'])) {
				$websites = json_decode($row['websites'], true);
				$results[$i]['websites'] = '';

				if (is_array($websites) && !empty($websites)) {
					$results[$i]['websites'] = implode(', ', $websites);
				}
			}
			if (!empty($row['social_profiles'])) {
				$social_profiles = json_decode($row['social_profiles'], true);
				$row['social_profiles'] = '';
				$social_profiles_list = [];
				if (is_array($social_profiles) && !empty($social_profiles)) {
					foreach ($social_profiles as $social_profile) {
						$sp_formatted = Customer::formatSocialProfile($social_profile);
						$social_profiles_list[] = $sp_formatted['type_name'].':'.$social_profile['value'];
					}
					$results[$i]['social_profiles'] = implode(', ', $social_profiles_list);
				}
			}
		}

		$filename = 'customers_'.date('Y-m-d').'.csv';

		$encoding = $request->encoding;
		$separator = $request->separator;

		if ($separator == 'TAB') {
			$separator = "\t";
		}

		// Rename some fields.
		foreach ($fields as $i => $field_name) {
			// if (strstr($field_name, 'as emails')) {
			//     $field_name = 'emails';
			// }

			if (!empty($exportable_fields[$field_name])) {
				$fields[$i] = $exportable_fields[$field_name];
			}
		}

		$schema_insert = '"'.implode('"'.$separator.'"', $fields).'"';
		$out = $schema_insert."\n";

		foreach($results as $row) {
			$schema_insert = '';

			foreach ($row as $row_value) {
				$value_prepared = str_replace('"', '""', $row_value ?? '');
				$value_prepared = str_replace("\t", '', $value_prepared);
				$schema_insert .= '"'.$value_prepared.'"'.$separator;
			}

			$out .= $schema_insert."\n";
		}

		if (ob_get_contents()) {
			ob_clean();
		}

		if ($encoding != 'UTF-8') {
			try {
				$out = iconv("UTF-8", $encoding, $out);
			} catch (\Exception $e) {
				// https://github.com/freescout-helpdesk/freescout/issues/2825
				$out = iconv("UTF-8", $encoding.'//IGNORE', $out);
			}
			if ($encoding == 'UCS-2LE') {
				$out = "\xFF\xFE".$out;
			}
		} else {
			// BOM: https://github.com/freescout-helpdesk/freescout/issues/3993
			$out = "\xEF\xBB\xBF".$out;
		}

		header("Cache-Control: must-revalidate, no-cache, no-store, private");
		header("Content-Length: " . strlen($out));
		header("Content-type: application/csv; charset=UCS-2LE");
		header("Content-Disposition: attachment; filename=$filename");
		echo $out;
		exit;
	}
}