/**
 * @fileoverview 
 * @module utils/phone-resolver
 * @description 
 */

(global => {
    'use strict';

    const PhoneResolverEngine = {
        /**
         * @param {string|number} phone 
         * @returns {string} 
         */
        normalize: function(phone) {
            if (!phone) return '';
            let cleaned = String(phone).trim().replace(/[^0-9+]/g, '');

            if (cleaned.startsWith('00')) {
                cleaned = '+' + cleaned.slice(2);
            }

            if (!cleaned.startsWith('+') && cleaned.length >= 10) {
                if (cleaned.startsWith('01') && cleaned.length === 11) {
                    cleaned = '+20' + cleaned.slice(1);
                } else if (!cleaned.startsWith('+')) {
                    cleaned = '+' + cleaned;
                }
            }

            return cleaned;
        },

        /**
         * @param {string} phone 
         * @returns {{ isValid: boolean, normalized: string, digitsCount: number }}
         */
        validatePhoneFormat: function(phone) {
            const norm = this.normalize(phone);
            const digits = norm.replace(/[^0-9]/g, '');

            return {
                isValid: digits.length >= 8 && digits.length <= 16,
                normalized: norm,
                digitsCount: digits.length
            };
        },

        /**
         * @param {string} rawPhone 
         * @param {Array<Object>} contactsList 
         * @returns {Object|null} 
         */
        lookupByPhone: function(rawPhone, contactsList = []) {
            if (!rawPhone) return null;
            const normTarget = this.normalize(rawPhone);
            if (!normTarget) return null;

            const exactMatch = contactsList.find(c => {
                const normC = this.normalize(c.phone);
                if (normC === normTarget) return true;

                if (c.altPhones && Array.isArray(c.altPhones)) {
                    return c.altPhones.some(ap => {
                        const pVal = typeof ap === 'object' ? ap.phone : ap;
                        return this.normalize(pVal) === normTarget;
                    });
                }
                return false;
            });

            if (exactMatch) return exactMatch;

            const digitsOnly = normTarget.replace(/[^0-9]/g, '');
            if (digitsOnly.length >= 8) {
                const partialMatch = contactsList.find(c => {
                    const cDigits = (c.phone || '').replace(/[^0-9]/g, '');
                    return cDigits.endsWith(digitsOnly) || digitsOnly.endsWith(cDigits);
                });
                if (partialMatch) return partialMatch;
            }

            return null;
        },

        bindGlobalAutoResolution: function() {
            if (window.__fritreeGlobalPhoneAutoResBound) return;
            window.__fritreeGlobalPhoneAutoResBound = true;

            document.addEventListener('input', (e) => {
                const target = e.target;
                if (!target || (target.tagName !== 'INPUT' && target.tagName !== 'TEXTAREA')) return;
                if (target.classList.contains('kljqnbvx11')) return; 

                const val = target.value;
                if (!val || val.length < 8) return;

                const cleaned = this.normalize(val);
                if (cleaned && cleaned.length >= 8) {
                    const contacts = global.FritreeContacts ? global.FritreeContacts.getContacts() : [];
                    const match = this.lookupByPhone(cleaned, contacts);

                    if (match && match.name) {
                        const parentForm = target.closest('div, form, section') || target.parentNode;
                        if (parentForm) {
                            const nameInputs = parentForm.querySelectorAll('input[type="text"]:not([readonly]), input[id*="name"], input[placeholder*="اسم"]');
                            nameInputs.forEach(input => {
                                if (input !== target && !input.value) {
                                    input.value = match.name;
                                    input.dispatchEvent(new Event('input', { bubbles: true }));

                                    const originalBg = input.style.backgroundColor;
                                    input.style.backgroundColor = '#dcfce7';
                                    input.style.transition = 'background-color 0.3s ease';
                                    setTimeout(() => { 
                                        input.style.backgroundColor = originalBg || ''; 
                                    }, 1600);
                                }
                            });
                        }
                    }
                }
            });
        }
    };

    global.FritreeContactsResolver = PhoneResolverEngine;

})(typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : this);