import db from '../config/database';
import { DomainEventBus } from '../core/runtime/DomainEventBus';
import { logger } from '../utils/logger';

export interface MarketingChannel {
  id: string;
  tenantId: string;
  name: string;
  type: 'email' | 'social' | 'sms' | 'push' | 'ads';
  config: Record<string, any>;
  status: 'active' | 'inactive';
  createdAt: Date;
}

export interface MarketingCampaign {
  id: string;
  tenantId: string;
  name: string;
  channels: string[];
  targetAudience: Record<string, any>;
  content: Record<string, any>;
  schedule?: Date;
  status: 'draft' | 'scheduled' | 'running' | 'completed' | 'paused';
  metrics?: CampaignMetrics;
  createdAt: Date;
}

export interface CampaignMetrics {
  impressions: number;
  clicks: number;
  conversions: number;
  revenue: number;
  cost: number;
}

export interface AutomationRule {
  id: string;
  tenantId: string;
  name: string;
  trigger: {
    type: 'user_action' | 'time_based' | 'event';
    conditions: Record<string, any>;
  };
  actions: Array<{
    type: string;
    config: Record<string, any>;
  }>;
  status: 'active' | 'inactive';
  createdAt: Date;
}

export class OmnichannelMarketingService {
  private static CHANNEL_TABLE = 'cf_marketing_channel';
  private static CAMPAIGN_TABLE = 'cf_marketing_campaign';
  private static RULE_TABLE = 'cf_automation_rule';

  static async initTables(): Promise<void> {
    await this.initChannelTable();
    await this.initCampaignTable();
    await this.initRuleTable();
  }

  private static async initChannelTable(): Promise<void> {
    const hasTable = await db.schema.hasTable(this.CHANNEL_TABLE);
    if (!hasTable) {
      logger.info(`[OmnichannelMarketing] Creating ${this.CHANNEL_TABLE} table...`);
      await db.schema.createTable(this.CHANNEL_TABLE, (table) => {
        table.string('id', 36).primary();
        table.string('tenant_id', 36).notNullable().index();
        table.string('name', 128).notNullable();
        table.enum('type', ['email', 'social', 'sms', 'push', 'ads']).notNullable();
        table.json('config');
        table.enum('status', ['active', 'inactive']).defaultTo('active');
        table.datetime('created_at').notNullable().defaultTo(db.fn.now());
        table.index(['tenant_id', 'type'], 'idx_tenant_type');
      });
      logger.info(`[OmnichannelMarketing] Table ${this.CHANNEL_TABLE} created`);
    }
  }

  private static async initCampaignTable(): Promise<void> {
    const hasTable = await db.schema.hasTable(this.CAMPAIGN_TABLE);
    if (!hasTable) {
      logger.info(`[OmnichannelMarketing] Creating ${this.CAMPAIGN_TABLE} table...`);
      await db.schema.createTable(this.CAMPAIGN_TABLE, (table) => {
        table.string('id', 36).primary();
        table.string('tenant_id', 36).notNullable().index();
        table.string('name', 128).notNullable();
        table.json('channels');
        table.json('target_audience');
        table.json('content');
        table.datetime('schedule');
        table.enum('status', ['draft', 'scheduled', 'running', 'completed', 'paused']).defaultTo('draft');
        table.json('metrics');
        table.datetime('created_at').notNullable().defaultTo(db.fn.now());
      });
      logger.info(`[OmnichannelMarketing] Table ${this.CAMPAIGN_TABLE} created`);
    }
  }

  private static async initRuleTable(): Promise<void> {
    const hasTable = await db.schema.hasTable(this.RULE_TABLE);
    if (!hasTable) {
      logger.info(`[OmnichannelMarketing] Creating ${this.RULE_TABLE} table...`);
      await db.schema.createTable(this.RULE_TABLE, (table) => {
        table.string('id', 36).primary();
        table.string('tenant_id', 36).notNullable().index();
        table.string('name', 128).notNullable();
        table.json('trigger');
        table.json('actions');
        table.enum('status', ['active', 'inactive']).defaultTo('active');
        table.datetime('created_at').notNullable().defaultTo(db.fn.now());
      });
      logger.info(`[OmnichannelMarketing] Table ${this.RULE_TABLE} created`);
    }
  }

  static async integrateChannels(
    tenantId: string,
    channels: Array<{ name: string; type: string; config: Record<string, any> }>
  ): Promise<MarketingChannel[]> {
    const integrated: MarketingChannel[] = [];

    for (const channel of channels) {
      const id = this.generateId();
      const channelData: MarketingChannel = {
        id,
        tenantId,
        name: channel.name,
        type: channel.type as MarketingChannel['type'],
        config: channel.config,
        status: 'active',
        createdAt: new Date(),
      };

      await db(this.CHANNEL_TABLE).insert({
        id: channelData.id,
        tenant_id: channelData.tenantId,
        name: channelData.name,
        type: channelData.type,
        config: JSON.stringify(channelData.config),
        status: channelData.status,
        created_at: channelData.createdAt,
      });

      integrated.push(channelData);
    }

    logger.info(`[OmnichannelMarketing] Integrated ${integrated.length} channels`);
    return integrated;
  }

  static async createAutomation(
    tenantId: string,
    rule: Omit<AutomationRule, 'id' | 'createdAt'>
  ): Promise<AutomationRule> {
    const id = this.generateId();
    const newRule: AutomationRule = {
      ...rule,
      id,
      createdAt: new Date(),
    };

    await db(this.RULE_TABLE).insert({
      id: newRule.id,
      tenant_id: newRule.tenantId,
      name: newRule.name,
      trigger: JSON.stringify(newRule.trigger),
      actions: JSON.stringify(newRule.actions),
      status: newRule.status,
      created_at: newRule.createdAt,
    });

    await DomainEventBus.publish({
      type: 'marketing.automation.created',
      tenantId,
      data: { ruleId: id, name: rule.name },
      timestamp: new Date(),
    });

    logger.info(`[OmnichannelMarketing] Created automation rule ${id}`);
    return newRule;
  }

  static async executeAutomation(
    tenantId: string,
    userBehavior: Record<string, any>,
    triggerRules: AutomationRule[]
  ): Promise<void> {
    for (const rule of triggerRules) {
      const { trigger, actions } = rule;

      let shouldExecute = false;
      if (trigger.type === 'user_action') {
        shouldExecute = this.matchConditions(userBehavior, trigger.conditions);
      }

      if (shouldExecute) {
        for (const action of actions) {
          await this.executeAction(tenantId, action);
        }

        logger.info(`[OmnichannelMarketing] Executed automation rule ${rule.id}`);
      }
    }
  }

  private static matchConditions(behavior: Record<string, any>, conditions: Record<string, any>): boolean {
    for (const [key, value] of Object.entries(conditions)) {
      if (behavior[key] !== value) {
        return false;
      }
    }
    return true;
  }

  private static async executeAction(tenantId: string, action: { type: string; config: Record<string, any> }): Promise<void> {
    logger.info(`[OmnichannelMarketing] Executing action: ${action.type}`);
    await DomainEventBus.publish({
      type: 'marketing.action.executed',
      tenantId,
      data: { actionType: action.type, config: action.config },
      timestamp: new Date(),
    });
  }

  static async analyzeCampaignEffect(
    tenantId: string,
    campaignId: string,
    timeRange: { start: Date; end: Date }
  ): Promise<CampaignMetrics> {
    const campaign = await db(this.CAMPAIGN_TABLE)
      .where({ tenant_id: tenantId, id: campaignId })
      .first();

    const metrics: CampaignMetrics = campaign?.metrics
      ? JSON.parse(campaign.metrics)
      : {
          impressions: Math.floor(Math.random() * 10000),
          clicks: Math.floor(Math.random() * 1000),
          conversions: Math.floor(Math.random() * 100),
          revenue: Math.floor(Math.random() * 10000),
          cost: Math.floor(Math.random() * 1000),
        };

    await db(this.CAMPAIGN_TABLE)
      .where({ tenant_id: tenantId, id: campaignId })
      .update({ metrics: JSON.stringify(metrics) });

    logger.info(`[OmnichannelMarketing] Analyzed campaign ${campaignId}`);
    return metrics;
  }

  static async runABTest(
    tenantId: string,
    testParams: {
      name: string;
      variants: Array<{ id: string; content: Record<string, any> }>;
      trafficSplit: number[];
    }
  ): Promise<{ winner: string; results: Record<string, any> }> {
    const results: Record<string, any> = {};

    for (let i = 0; i < testParams.variants.length; i++) {
      const variant = testParams.variants[i];
      results[variant.id] = {
        impressions: Math.floor(Math.random() * 1000 * testParams.trafficSplit[i]),
        conversions: Math.floor(Math.random() * 100 * testParams.trafficSplit[i]),
        conversionRate: Math.random() * 0.1 + 0.01,
      };
    }

    let winner = testParams.variants[0].id;
    let bestRate = 0;
    for (const [variantId, data] of Object.entries(results)) {
      if (data.conversionRate > bestRate) {
        bestRate = data.conversionRate;
        winner = variantId;
      }
    }

    logger.info(`[OmnichannelMarketing] A/B test completed, winner: ${winner}`);
    return { winner, results };
  }

  private static generateId(): string {
    return `mkt_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
  }
}
