import { Building, District } from "../types";
import { MOCK_BUILDINGS, MOCK_DISTRICTS } from "../constants";

const DB_KEY_BUILDINGS = 'mkd_buildings_v2';
const DB_KEY_DISTRICTS = 'mkd_districts_v2';
const DB_KEY_GLOBAL_PASSPORT_FIELDS = 'mkd_global_passport_fields';

export const storageService = {
  // --- DISTRICTS ---
  getDistricts: (): District[] => {
    try {
      const stored = localStorage.getItem(DB_KEY_DISTRICTS);
      if (stored) {
        const parsed = JSON.parse(stored);
        return Array.isArray(parsed) ? parsed : [];
      }
      return [];
    } catch (e) {
      return [];
    }
  },

  saveDistrict: (district: District): void => {
    const all = storageService.getDistricts();
    const index = all.findIndex(d => d.id === district.id);
    let newAll;
    if (index >= 0) {
      newAll = [...all];
      newAll[index] = district;
    } else {
      newAll = [...all, district];
    }
    localStorage.setItem(DB_KEY_DISTRICTS, JSON.stringify(newAll));
  },

  createDistrict: (data: Omit<District, 'id'>): District => {
    const newDistrict: District = {
      ...data,
      id: `d-${Date.now()}`
    };
    storageService.saveDistrict(newDistrict);
    return newDistrict;
  },

  deleteDistrict: (id: string): void => {
    const all = storageService.getDistricts();
    const newAll = all.filter(d => d.id !== id);
    localStorage.setItem(DB_KEY_DISTRICTS, JSON.stringify(newAll));
  },

  // --- BUILDINGS ---
  getAllBuildings: (): Building[] => {
    try {
      const stored = localStorage.getItem(DB_KEY_BUILDINGS);
      if (stored) {
        const parsed = JSON.parse(stored);
        return Array.isArray(parsed) ? parsed : [];
      }
      return [];
    } catch (e) {
      return [];
    }
  },

  getBuildingsByDistrict: (districtId: string): Building[] => {
    const all = storageService.getAllBuildings();
    return all.filter(b => b.districtId === districtId);
  },

  getBuildingById: (id: string): Building | undefined => {
    const all = storageService.getAllBuildings();
    return all.find(b => b.id === id);
  },

  saveBuildingData: (updatedBuilding: Building): void => {
    try {
      const all = storageService.getAllBuildings();
      const index = all.findIndex(b => b.id === updatedBuilding.id);
      const toSave = {
        ...updatedBuilding,
        isDirty: true,
        lastSync: Date.now()
      };
      let newAll;
      if (index >= 0) {
        newAll = [...all];
        newAll[index] = toSave;
      } else {
        newAll = [...all, toSave];
      }
      localStorage.setItem(DB_KEY_BUILDINGS, JSON.stringify(newAll));
    } catch (e) {
      console.error("Failed to save to storage", e);
    }
  },

  createBuilding: (data: Partial<Building> & { address: string, districtId: string }): Building => {
     const id = `b-${Date.now()}`;
     const newBuilding: Building = {
        id,
        districtId: data.districtId,
        imageUrl: data.imageUrl || 'https://picsum.photos/800/600',
        nps: 0,
        passport: {
            address: data.address,
            apartmentsCount: 0,
            general: {
                address: data.address,
                fiasCode: '',
                constructionYear: new Date().getFullYear(),
                commissionYear: new Date().getFullYear(),
                seriesType: 'Индивидуальный',
                floors: 1,
                undergroundFloors: 0,
                totalArea: 0,
                livingArea: 0,
                nonLivingArea: 0,
                commonArea: 0,
                cadastralNumberBuild: '',
                cadastralNumberLand: ''
            },
            construction: { foundationType: '', foundationMaterial: '', wallMaterial: '', floorMaterial: '', roofType: '', roofMaterial: '', roofArea: 0, facadeType: '', facadeInsulation: false, windowType: '' },
            engineering: { heatingType: '', heatingWiring: '', hasITP: false, waterSupplyMaterial: '', waterSupplyType: '', sewerMaterial: '', electricityEntries: 1, hasVRU: false, gasType: '', ventilationType: '' },
            odpu: { customFields: {} },
            meters: [],
            lifts: [],
            land: { area: 0, hasPlayground: false, hasSportsGround: false, hasParking: false, hasFencing: false, hasContainerSite: false },
            management: { 
                contractDate: '', 
                contractNumber: '', 
                servicesList: [], 
                tariffMaintenance: 0,
                reserveFund: 5.00, // Значение по умолчанию 5%
                serviceContracts: [] // Initialize empty array
            },
            ...data.passport
        },
        staff: [],
        entrances: [],
        commonSections: [],
        accounts: [],
        financials: { balance: 0, debt: 0, collectionRate: 0, topDebtors: [], invoices: [] },
        requests: { new: 0, inProgress: 0, overdue: 0 },
        inspectionHistory: [],
        tasks: [],
        annualPlan: [],
        inventory: [],
        writeOffHistory: [],
        residents: [],
        reports: [],
        isDirty: true,
        ...data
     };
     storageService.saveBuildingData(newBuilding);
     return newBuilding;
  },

  deleteBuilding: (id: string): void => {
    const all = storageService.getAllBuildings();
    const newAll = all.filter(b => b.id !== id);
    localStorage.setItem(DB_KEY_BUILDINGS, JSON.stringify(newAll));
  },

  syncWithServer: async (): Promise<boolean> => {
    return new Promise((resolve) => {
      setTimeout(() => {
        const all = storageService.getAllBuildings();
        const cleaned = all.map(b => ({ ...b, isDirty: false }));
        localStorage.setItem(DB_KEY_BUILDINGS, JSON.stringify(cleaned));
        resolve(true);
      }, 1500);
    });
  },
  clearLocal: () => {
    localStorage.removeItem(DB_KEY_BUILDINGS);
    localStorage.removeItem(DB_KEY_DISTRICTS);
  },

  // --- GLOBAL PASSPORT FIELDS (для всех домов) ---
  getGlobalPassportFields: (): { [section: string]: { [fieldName: string]: { value: any; type: string; files?: string[] } } } => {
    try {
      const stored = localStorage.getItem(DB_KEY_GLOBAL_PASSPORT_FIELDS);
      if (stored) return JSON.parse(stored);
      return {};
    } catch (e) {
      return {};
    }
  },

  saveGlobalPassportField: (section: 'general' | 'construction' | 'engineering' | 'odpu' | 'land' | 'management', fieldName: string, fieldType: 'text' | 'number' | 'checkbox'): void => {
    const globalFields = storageService.getGlobalPassportFields();
    if (!globalFields[section]) {
      globalFields[section] = {};
    }
    const defaultValue = fieldType === 'number' ? 0 : fieldType === 'checkbox' ? false : '';
    globalFields[section][fieldName] = {
      value: defaultValue,
      type: fieldType,
      files: []
    };
    localStorage.setItem(DB_KEY_GLOBAL_PASSPORT_FIELDS, JSON.stringify(globalFields));
    
    // Применяем это поле ко всем домам
    const allBuildings = storageService.getAllBuildings();
    allBuildings.forEach(building => {
      const sectionData = building.passport[section] as any;
      const customFields = { ...(sectionData.customFields || {}) };
      if (!customFields[fieldName]) {
        customFields[fieldName] = {
          value: defaultValue,
          type: fieldType,
          files: []
        };
        const updatedSection = { ...sectionData, customFields };
        building.passport[section] = updatedSection as any;
      }
    });
    localStorage.setItem(DB_KEY_BUILDINGS, JSON.stringify(allBuildings));
  },

  updateGlobalPassportField: (section: 'general' | 'construction' | 'engineering' | 'odpu' | 'land' | 'management', fieldName: string, value: any, files?: string[]): void => {
    const globalFields = storageService.getGlobalPassportFields();
    if (globalFields[section] && globalFields[section][fieldName]) {
      globalFields[section][fieldName].value = value;
      if (files !== undefined) {
        globalFields[section][fieldName].files = files;
      }
      localStorage.setItem(DB_KEY_GLOBAL_PASSPORT_FIELDS, JSON.stringify(globalFields));
      
      // Обновляем это поле во всех домах
      const allBuildings = storageService.getAllBuildings();
      allBuildings.forEach(building => {
        const sectionData = building.passport[section] as any;
        const customFields = { ...(sectionData.customFields || {}) };
        if (customFields[fieldName]) {
          customFields[fieldName].value = value;
          if (files !== undefined) {
            customFields[fieldName].files = files;
          }
          const updatedSection = { ...sectionData, customFields };
          building.passport[section] = updatedSection as any;
        }
      });
      localStorage.setItem(DB_KEY_BUILDINGS, JSON.stringify(allBuildings));
    }
  },

  deleteGlobalPassportField: (section: 'general' | 'construction' | 'engineering' | 'odpu' | 'land' | 'management', fieldName: string): void => {
    const globalFields = storageService.getGlobalPassportFields();
    if (globalFields[section] && globalFields[section][fieldName]) {
      delete globalFields[section][fieldName];
      if (Object.keys(globalFields[section]).length === 0) {
        delete globalFields[section];
      }
      localStorage.setItem(DB_KEY_GLOBAL_PASSPORT_FIELDS, JSON.stringify(globalFields));
      
      // Удаляем это поле из всех домов
      const allBuildings = storageService.getAllBuildings();
      allBuildings.forEach(building => {
        const sectionData = building.passport[section] as any;
        const customFields = { ...(sectionData.customFields || {}) };
        if (customFields[fieldName]) {
          delete customFields[fieldName];
          const updatedSection = { ...sectionData, customFields };
          building.passport[section] = updatedSection as any;
        }
      });
      localStorage.setItem(DB_KEY_BUILDINGS, JSON.stringify(allBuildings));
    }
  }
};