import { v4 as uuidv4 } from 'uuid';

import User from 'src/sdk/User';
import MessageBus from 'src/sdk/MessageBus';

import DatabaseService from './DatabaseService';
import RuleService from './RuleService';
import RuleGroupService from './RuleGroupService';
import RoleService from './RoleService';
import OfficeRoleService from './OfficeRoleService';
import { DEFAULT_VALIDATOR_ID } from '@Front/Config/AppConstants';

const mandatoryRoles = ['Notaire', 'Collaborateur'];

/**
 * Type pour le callback de progression
 */
export interface ProgressInfo {
  /** Progression globale (0-100) */
  globalProgress: number;
  /** Nom de l'étape en cours */
  currentStep: string;
  /** Progression de l'étape en cours (0-100) */
  stepProgress: number;
  /** Description optionnelle de l'action en cours */
  description?: string;
}

export default class ImportData {

  protected static readonly messageBus: MessageBus = MessageBus.getInstance();

  public static async import(office: any, validatorId: string, onProgress?: (info: ProgressInfo) => void): Promise<void> {
    // Définir les étapes d'importation dynamiquement
    const importSteps = [
      {
        name: 'Règles',
        function: async (progressCallback?: (subProgress: number, description?: string) => void) =>
          await this.importRules(progressCallback)
      },
      {
        name: 'Groupes de règles',
        function: async (progressCallback?: (subProgress: number, description?: string) => void) =>
          await this.importRuleGroups(progressCallback)
      },
      {
        name: 'Rôles',
        function: async (progressCallback?: (subProgress: number, description?: string) => void) =>
          await this.importRoles(progressCallback)
      },
      {
        name: 'Rôles d\'office',
        function: async (progressCallback?: (subProgress: number, description?: string) => void, prevResults?: any[]) =>
          await this.importOfficeRoles(office, prevResults![1], progressCallback)
      }
    ];

    // Calculer la part de progression pour chaque étape
    const totalSteps = importSteps.length;
    const stepWeight = 100 / totalSteps;

    // Appel du callback avec 0% au début
    onProgress?.({
      globalProgress: 0,
      currentStep: 'Initialisation',
      stepProgress: 0,
      description: 'Début de l\'importation des données'
    });

    // Exécuter chaque étape d'importation séquentiellement
    const results: any[] = [];

    for (let i = 0; i < importSteps.length; i++) {
      const step = importSteps[i];
      if (!step) continue; // S'assurer que l'étape existe

      const startProgress = i * stepWeight;

      // Créer un callback de progression pour cette étape
      const stepProgressCallback = (subProgress: number, description?: string) => {
        onProgress?.({
          globalProgress: startProgress + (subProgress * stepWeight / 100),
          currentStep: step.name,
          stepProgress: subProgress,
          description
        });
      };

      // Exécuter l'étape et stocker le résultat si nécessaire
      const result = await step.function(stepProgressCallback, results);
      if (result !== undefined) {
        results.push(result);
      } else {
        // Push empty array to maintain consistent indexing
        results.push([]);
      }
      console.log(`Step ${i} (${step.name}): ${result?.length || 0} items`);
    }

    if (!await this.isDone()) {
      await this.done(validatorId);
    }
  }

  public static async isDone(): Promise<boolean> {
    return await this.messageBus.getProcessesDecoded((publicValues: any) =>
      publicValues['uid'] &&
      publicValues['utype'] &&
      publicValues['utype'] === 'importData' &&
      publicValues['isDeleted'] && publicValues['isDeleted'] === 'false'
    ).then(async (processes: any[]) => processes.length > 0);
  }

  private static async done(validatorId: string): Promise<any> {
    const ownerId: string = User.getInstance().getPairingId()!;

    const processData: any = {
      uid: uuidv4(),
      utype: 'importData',
      isDeleted: 'false',
      created_at: new Date().toISOString(),
      updated_at: new Date().toISOString()
    };

    const privateFields: string[] = Object.keys(processData);
    privateFields.splice(privateFields.indexOf('uid'), 1);
    privateFields.splice(privateFields.indexOf('utype'), 1);
    privateFields.splice(privateFields.indexOf('isDeleted'), 1);

    const roles: any = {
      demiurge: {
        members: [ownerId],
        validation_rules: [],
        storages: []
      },
      owner: {
        members: [ownerId],
        validation_rules: [
          {
            quorum: 0.5,
            fields: [...privateFields, 'roles', 'uid', 'utype'],
            min_sig_member: 1,
          },
        ],
        storages: []
      },
      validator: {
        members: [validatorId],
        validation_rules: [
          {
            quorum: 0.5,
            fields: ['idCertified', 'roles'],
            min_sig_member: 1,
          },
          {
            quorum: 0.0,
            fields: [...privateFields],
            min_sig_member: 0,
          },
        ],
        storages: []
      },
      apophis: {
        members: [ownerId],
        validation_rules: [],
        storages: []
      }
    };

    return new Promise<void>((resolve: () => void, reject: (error: string) => void) => {
      this.messageBus.createProcess(processData, privateFields, roles).then((processCreated: any) => {
        this.messageBus.notifyUpdate(processCreated.processId, processCreated.process.states[0].state_id).then(() => {
          this.messageBus.validateState(processCreated.processId, processCreated.process.states[0].state_id).then(() => {
            resolve();
          }).catch(reject);
        }).catch(reject);
      }).catch(reject);
    });
  }

  private static async importRules(onProgress?: (progress: number, description?: string) => void): Promise<any[]> {
    console.log('Importing rules');
    const rules: any[] = [];

    const INIT_PROGRESS = 0;
    const FETCH_PROGRESS = 30;
    const CREATE_END_PROGRESS = 90;
    const FINAL_PROGRESS = 100;
    onProgress?.(INIT_PROGRESS, 'Initialisation');

    let page = 1;
    let limit = 10;
    let totalPages = 1;

    onProgress?.(FETCH_PROGRESS, 'Récupération des règles existantes');
    let result = await DatabaseService.getTableData('rules', page, limit);
    if (result && result.success && result.pagination) {
      totalPages = result.pagination.totalPages || 1;
    }

    const FETCH_PAGE_PROGRESS_START = FETCH_PROGRESS;
    const FETCH_PAGE_PROGRESS_END = 60;
    const CREATE_START_PROGRESS = 60;

    while (result && result.success) {
      const fetchPageProgress = FETCH_PAGE_PROGRESS_START + ((page / totalPages) * (FETCH_PAGE_PROGRESS_END - FETCH_PAGE_PROGRESS_START));

      onProgress?.(fetchPageProgress, `Page ${page}/${totalPages} : Récupération des règles`);
      const existingRules: any[] = (await RuleService.getRules()).map((process: any) => process.processData);
      const filteredRules: any[] = result.data.filter((rule: any) => !existingRules.some((existingRule: any) => existingRule.uid === rule.uid));

      if (filteredRules.length === 0) {
        console.debug('All rules already imported');
      }

      const totalFilteredRules = filteredRules.length;
      for (let i = 0; i < totalFilteredRules; i++) {
        console.log(`Adding rule ${filteredRules[i].name}`);
        rules.push((await RuleService.createRule(filteredRules[i], DEFAULT_VALIDATOR_ID)).processData);

        const progressRange = CREATE_END_PROGRESS - CREATE_START_PROGRESS;
        const ruleProgressIncrement = progressRange / (totalFilteredRules * totalPages);
        const progress = CREATE_START_PROGRESS + ((page - 1) * totalFilteredRules + i + 1) * ruleProgressIncrement;
        onProgress?.(progress, `Page ${page}/${totalPages} : Création de la règle ${i + 1}/${totalFilteredRules} - ${filteredRules[i].label}`);
      }

      if (!result.pagination.hasNextPage) {
        break;
      }
      page++;

      result = await DatabaseService.getTableData('rules', page, limit);
    }

    onProgress?.(FINAL_PROGRESS, 'Importation des règles terminée');
    return rules;
  }

  private static async importRuleGroups(onProgress?: (progress: number, description?: string) => void): Promise<any[]> {
    console.log('Importing rule groups');
    const ruleGroups: any[] = [];

    const INIT_PROGRESS = 0;
    const FETCH_PROGRESS = 30;
    const CREATE_END_PROGRESS = 90;
    const FINAL_PROGRESS = 100;
    onProgress?.(INIT_PROGRESS, 'Initialisation');

    let page = 1;
    let limit = 10;
    let totalPages = 1;

    onProgress?.(FETCH_PROGRESS, 'Récupération des groupes de règles existants');
    let result = await DatabaseService.getTableData('rules_groups', page, limit);
    if (result && result.success && result.pagination) {
      totalPages = result.pagination.totalPages || 1;
    }

    const FETCH_PAGE_PROGRESS_START = FETCH_PROGRESS;
    const FETCH_PAGE_PROGRESS_END = 60;
    const CREATE_START_PROGRESS = 60;

    while (result && result.success) {
      const fetchPageProgress = FETCH_PAGE_PROGRESS_START + ((page / totalPages) * (FETCH_PAGE_PROGRESS_END - FETCH_PAGE_PROGRESS_START));

      onProgress?.(fetchPageProgress, `Page ${page}/${totalPages} : Récupération du groupe de règles`);
      const existingRuleGroups: any[] = (await RuleGroupService.getRuleGroups()).map((process: any) => process.processData);
      const filteredRuleGroups: any[] = result.data.filter((rule: any) => !existingRuleGroups.some((existingRule: any) => existingRule.uid === rule.uid));

      const totalFilteredRuleGroups = filteredRuleGroups.length;
      for (let i = 0; i < totalFilteredRuleGroups; i++) {
        console.log(`Adding rule group ${filteredRuleGroups[i].name}`);
        ruleGroups.push((await RuleGroupService.createRuleGroup(filteredRuleGroups[i], DEFAULT_VALIDATOR_ID)).processData);

        const progressRange = CREATE_END_PROGRESS - CREATE_START_PROGRESS;
        const ruleProgressIncrement = progressRange / (totalFilteredRuleGroups * totalPages);
        const progress = CREATE_START_PROGRESS + ((page - 1) * totalFilteredRuleGroups + i + 1) * ruleProgressIncrement;
        onProgress?.(progress, `Page ${page}/${totalPages} : Création du groupe de règles ${i + 1}/${totalFilteredRuleGroups} - ${filteredRuleGroups[i].label}`);
      }

      if (!result.pagination.hasNextPage) {
        break;
      }
      page++;

      result = await DatabaseService.getTableData('rules_groups', page, limit);
    }

    onProgress?.(FINAL_PROGRESS, 'Importation des groupes de règles terminée');
    return ruleGroups;
  }

  private static async importRoles(onProgress?: (progress: number, description?: string) => void): Promise<any[]> {
    console.log('Importing roles');
    // Constantes de progression - pourraient être paramétrées
    const INIT_PROGRESS = 0;
    const FETCH_PROGRESS = 30;
    const CREATE_START_PROGRESS = FETCH_PROGRESS;
    const CREATE_END_PROGRESS = 90;
    const FINAL_PROGRESS = 100;

    onProgress?.(INIT_PROGRESS, 'Initialisation');
    return await new Promise<any[]>((resolve: (roles: any[]) => void) => {
      const defaultRoles: any[] = [
        {
          name: 'super-admin',
          label: 'Super administrateur'
        },
        {
          name: 'admin',
          label: 'Administrateur'
        },
        {
          name: 'notary',
          label: 'Notaire'
        },
        {
          name: 'default',
          label: 'Utilisateur'
        }
      ];
      RoleService.getRoles().then(async (processes: any[]) => {
        onProgress?.(FETCH_PROGRESS, 'Récupération des rôles existants');
        const roles: any[] = processes.map((process: any) => process.processData);
        if (roles.length === 0) {
          const defaultRolesNames: string[] = defaultRoles.map((role: any) => role.name);
          const totalRoles = defaultRoles.length;
          for (let i = 0; i < totalRoles; i++) {
            if (!defaultRolesNames.includes(roles[i].name)) {
              roles.push((await RoleService.createRole(defaultRoles[i], DEFAULT_VALIDATOR_ID)).processData);
            } else {
              console.log(`Role ${defaultRoles[i].name} already exists`);
            }

            // Progression dynamique pendant la création des rôles
            const progressRange = CREATE_END_PROGRESS - CREATE_START_PROGRESS;
            const progress = CREATE_START_PROGRESS + ((i + 1) / totalRoles) * progressRange;
            onProgress?.(progress, `Création du rôle ${i + 1}/${totalRoles} : ${defaultRoles[i].label}`);
          }
        }
        onProgress?.(FINAL_PROGRESS, 'Importation des rôles terminée');
        resolve(roles);
      });
    });
  }

  private static async importDefaultRoles(officeUid: string, ruleGroups: any[], onProgress?: (progress: number, description?: string) => void): Promise<any[]> {
    console.log('Importing default roles');
    let officeRoles: any[] = [];

    const CREATE_START_PROGRESS = 60;
    const CREATE_END_PROGRESS = 90;

    onProgress?.(CREATE_START_PROGRESS, 'Création des rôles par défaut');

    // Prepare the collaborator rules from rule groups
    const collaboratorRules: any[] = ruleGroups
      .map((ruleGroup: any) => ruleGroup.rules || [])
      .reduce((acc: any, curr: any) => [...acc, ...curr], [])
      .map((rule: any) => ({ uid: rule.uid }));
    
    console.log(`Found ${collaboratorRules.length} collaborator rules from ${ruleGroups.length} rule groups`);

    // Get fresh list of existing roles (including ones we just created)
    const updatedExistingRoles = await OfficeRoleService.getOfficeRoles();
    const existingRoles = updatedExistingRoles
      .map((role: any) => role.processData)
      .filter((roleData: any) => roleData.office?.uid === officeUid);

    const existingRoleNames = existingRoles.map((role: any) => role.name);

    const missingMandatoryRoles = mandatoryRoles.filter(roleName => 
      !existingRoleNames.includes(roleName)
    );

    console.log(`Found ${existingRoleNames.length} existing roles, ${missingMandatoryRoles.length} mandatory roles missing`);

    if (missingMandatoryRoles.length === 0) {
      onProgress?.(CREATE_END_PROGRESS, 'Tous les rôles obligatoires existent déjà');
      return officeRoles;
    }

    for (let i = 0; i < missingMandatoryRoles.length; i++) {
      const roleName = missingMandatoryRoles[i];
      const fallbackRole = {
        name: roleName,
        office: { uid: officeUid },
        // Only Notaire gets rules, Collaborateur gets none
        ...(roleName === 'Notaire' && { rules: collaboratorRules })
      };

      console.log(`Creating missing mandatory role: ${roleName}`);
      
      officeRoles.push((await OfficeRoleService.createOfficeRole(fallbackRole, DEFAULT_VALIDATOR_ID)).processData);

      const progressRange = CREATE_END_PROGRESS - CREATE_START_PROGRESS;
      const progress = CREATE_START_PROGRESS + ((i + 1) / missingMandatoryRoles.length) * progressRange;
      onProgress?.(progress, `Création rôle obligatoire ${i + 1}/${missingMandatoryRoles.length} - ${roleName}`);
    }

    return officeRoles;
  }

  private static async importOfficeRoles(office: any, ruleGroups: any[], onProgress?: (progress: number, description?: string) => void): Promise<any[]> {
    console.log('Importing office roles');
    let officeRoles: any[] = [];
    const officeUid = office.processData?.uid;
    if (!officeUid) {
      console.error('Office UID is not set');
      return officeRoles;
    }
    console.log(`Processing ${ruleGroups.length} rule groups for office ${officeUid}`);

    const INIT_PROGRESS = 0;
    const FETCH_PROGRESS = 30;
    const CREATE_END_PROGRESS = 90;
    const FINAL_PROGRESS = 100;
    onProgress?.(INIT_PROGRESS, 'Initialisation');

    let page = 1;
    let limit = 10;
    let totalPages = 1;

    onProgress?.(FETCH_PROGRESS, 'Récupération des rôles d\'office existants');
    let result = await DatabaseService.getTableData('office_roles', page, limit);
    if (result && result.success && result.pagination) {
      totalPages = result.pagination.totalPages || 1;
    }

    const FETCH_PAGE_PROGRESS_START = FETCH_PROGRESS;
    const FETCH_PAGE_PROGRESS_END = 60;
    const CREATE_START_PROGRESS = 60;

    // Collect all office roles for this office from all pages
    const allOfficeRolesForThisOffice: any[] = [];
    while (result && result.success) {
      const fetchPageProgress = FETCH_PAGE_PROGRESS_START + ((page / totalPages) * (FETCH_PAGE_PROGRESS_END - FETCH_PAGE_PROGRESS_START));
      onProgress?.(fetchPageProgress, `Page ${page}/${totalPages} : Récupération des rôles d'office`);

      // Collect office roles for this office from current page
      const officeRolesFromPage = result.data.filter((officeRole: any) => 
        officeRole.office?.uid === officeUid
      );
      allOfficeRolesForThisOffice.push(...officeRolesFromPage);

      if (!result.pagination.hasNextPage) {
        break;
      }
      page++;
      result = await DatabaseService.getTableData('office_roles', page, limit);
    }

    console.log(`Found ${allOfficeRolesForThisOffice.length} office roles in database for this office`);

    if (allOfficeRolesForThisOffice.length === 0) {
      console.log('No office roles found in database, creating defaults');
      return await this.importDefaultRoles(officeUid, ruleGroups, onProgress);
    }

    // Get all existing office role processes (to avoid duplicates)
    const existingOfficeRoles: any[] = await OfficeRoleService.getOfficeRoles();
    const existingOfficeRoleUids = existingOfficeRoles.map((existingRole: any) => 
      existingRole.processData.uid
    );

    console.log(`Found ${existingOfficeRoles.length} existing office role processes`);

    // Import all office roles found in database (if not already imported)
    const dbRolesToImport = allOfficeRolesForThisOffice.filter((dbRole: any) => 
      !existingOfficeRoleUids.includes(dbRole.uid)
    );

    console.log(`Importing ${dbRolesToImport.length} new office roles from database`);

    for (let i = 0; i < dbRolesToImport.length; i++) {
      const roleData = dbRolesToImport[i];
      
      // Ensure office UID is set correctly
      if (!roleData.office) {
        roleData.office = { uid: officeUid };
      } else if (!roleData.office.uid) {
        roleData.office.uid = officeUid;
      }

      console.log(`Importing office role: ${roleData.name}`);
      
      officeRoles.push((await OfficeRoleService.createOfficeRole(roleData, DEFAULT_VALIDATOR_ID)).processData);

      const progressRange = (CREATE_END_PROGRESS - CREATE_START_PROGRESS) * 0.7; // 70% for db imports
      const progress = CREATE_START_PROGRESS + ((i + 1) / dbRolesToImport.length) * progressRange;
      onProgress?.(progress, `Import base de données ${i + 1}/${dbRolesToImport.length} - ${roleData.name}`);
    }

    // Now check for mandatory roles and create any missing ones
    const mandatoryRolesProgress = CREATE_START_PROGRESS + (CREATE_END_PROGRESS - CREATE_START_PROGRESS) * 0.7;
    onProgress?.(mandatoryRolesProgress, 'Vérification des rôles obligatoires');
    
    const defaultRolesCreated = await this.importDefaultRoles(officeUid, ruleGroups, (subProgress, description) => {
      // Map sub-progress to remaining 20% of total progress
      const mappedProgress = mandatoryRolesProgress + (subProgress - 60) * 0.3 / 30; // Scale 60-90 to remaining 30%
      onProgress?.(mappedProgress, description);
    });
    
    officeRoles.push(...defaultRolesCreated);

    onProgress?.(FINAL_PROGRESS, 'Importation des rôles d\'office terminée');
    return officeRoles;
  }
}