import { withReporting } from "@calcom/lib/sentryWrapper";
import { prisma as defaultPrisma } from "@calcom/prisma";
import type { PrismaClient } from "@calcom/prisma";
import type { TimeUnit, WebhookTriggerEvents } from "@calcom/prisma/enums";

import type { WebhookSubscriber } from "../dto/types";
import type { IWebhookRepository } from "../interface/repository";
import type { GetSubscribersOptions } from "./types";

// Type for raw query results from the database
interface WebhookQueryResult {
  id: string;
  subscriberUrl: string;
  payloadTemplate: string | null;
  appId: string | null;
  secret: string | null;
  time: number | null;
  timeUnit: TimeUnit | null;
  eventTriggers: WebhookTriggerEvents[];
  priority: number; // This field is added by the query and removed before returning
}

export class WebhookRepository implements IWebhookRepository {
  constructor(private prisma: PrismaClient = defaultPrisma) {}

  async getSubscribers(options: GetSubscribersOptions): Promise<WebhookSubscriber[]> {
    const teamId = options.teamId;
    const userId = options.userId;
    const eventTypeId = options.eventTypeId;
    const teamIds = Array.isArray(teamId) ? teamId : teamId ? [teamId] : undefined;
    const orgId = options.orgId;
    const oAuthClientId = options.oAuthClientId;

    let managedParentEventTypeId: number | undefined;
    if (eventTypeId) {
      const managedChildEventType = await this.prisma.eventType.findFirst({
        where: {
          id: eventTypeId,
          parentId: {
            not: null,
          },
        },
        select: {
          parentId: true,
        },
      });
      managedParentEventTypeId = managedChildEventType?.parentId ?? undefined;
    }

    const webhooks = await this.getSubscribersRaw({
      userId,
      eventTypeId,
      managedParentEventTypeId,
      teamIds: teamIds && orgId ? [...teamIds, orgId] : teamIds || (orgId ? [orgId] : undefined),
      oAuthClientId,
      triggerEvent: options.triggerEvent,
    });

    return webhooks.map((webhook) => ({
      id: webhook.id,
      subscriberUrl: webhook.subscriberUrl,
      payloadTemplate: webhook.payloadTemplate,
      appId: webhook.appId,
      secret: webhook.secret,
      time: webhook.time,
      timeUnit: webhook.timeUnit as TimeUnit | null,
      eventTriggers: webhook.eventTriggers as WebhookTriggerEvents[],
    }));
  }

  /**
   * Raw SQL query using UNION for better index utilization than complex ORs
   * Each UNION branch can use its own optimal index
   */
  private async getSubscribersRaw(params: {
    userId?: number | null;
    eventTypeId?: number | null;
    managedParentEventTypeId?: number | null;
    teamIds?: number[];
    oAuthClientId?: string | null;
    triggerEvent: WebhookTriggerEvents;
  }): Promise<WebhookSubscriber[]> {
    const { userId, eventTypeId, managedParentEventTypeId, teamIds, oAuthClientId, triggerEvent } = params;

    // Use static SQL with IS NOT NULL guards and PostgreSQL ANY() for arrays
    const results = await this.prisma.$queryRaw<WebhookQueryResult[]>`
      -- Platform webhooks (highest priority)
      SELECT 
        id, "subscriberUrl", "payloadTemplate", "appId", secret, time, "timeUnit", "eventTriggers",
        1 as priority
      FROM "Webhook"
      WHERE active = true 
        AND platform = true 
        AND ${triggerEvent}::"WebhookTriggerEvents" = ANY("eventTriggers")
      
      UNION ALL
      
      -- User-specific webhooks (only if userId provided)
      SELECT 
        id, "subscriberUrl", "payloadTemplate", "appId", secret, time, "timeUnit", "eventTriggers",
        2 as priority
      FROM "Webhook"
      WHERE active = true 
        AND ${userId} IS NOT NULL
        AND "userId" = ${userId}
        AND ${triggerEvent}::"WebhookTriggerEvents" = ANY("eventTriggers")
        AND platform = false
      
      UNION ALL
      
      -- Event type webhooks (only if eventTypeId provided)
      SELECT 
        id, "subscriberUrl", "payloadTemplate", "appId", secret, time, "timeUnit", "eventTriggers",
        3 as priority
      FROM "Webhook"
      WHERE active = true 
        AND ${eventTypeId} IS NOT NULL
        AND "eventTypeId" = ${eventTypeId}
        AND ${triggerEvent}::"WebhookTriggerEvents" = ANY("eventTriggers")
        AND platform = false
      
      UNION ALL
      
      -- Parent event type webhooks (only if managedParentEventTypeId provided)
      SELECT 
        id, "subscriberUrl", "payloadTemplate", "appId", secret, time, "timeUnit", "eventTriggers",
        4 as priority
      FROM "Webhook"
      WHERE active = true 
        AND ${managedParentEventTypeId} IS NOT NULL
        AND "eventTypeId" = ${managedParentEventTypeId}
        AND ${triggerEvent}::"WebhookTriggerEvents" = ANY("eventTriggers")
        AND platform = false
      
      UNION ALL
      
      -- Team webhooks (only if teamIds provided and not empty)
      SELECT 
        id, "subscriberUrl", "payloadTemplate", "appId", secret, time, "timeUnit", "eventTriggers",
        5 as priority
      FROM "Webhook"
      WHERE active = true 
        AND ${teamIds} IS NOT NULL
        AND cardinality(${teamIds}::int[]) > 0
        AND "teamId" = ANY(${teamIds}::int[])
        AND ${triggerEvent}::"WebhookTriggerEvents" = ANY("eventTriggers")
        AND platform = false
      
      UNION ALL
      
      -- OAuth client webhooks (only if oAuthClientId provided)
      SELECT 
        id, "subscriberUrl", "payloadTemplate", "appId", secret, time, "timeUnit", "eventTriggers",
        6 as priority
      FROM "Webhook"
      WHERE active = true 
        AND ${oAuthClientId} IS NOT NULL
        AND "platformOAuthClientId" = ${oAuthClientId}
        AND ${triggerEvent}::"WebhookTriggerEvents" = ANY("eventTriggers")
        AND platform = false
      
      ORDER BY priority, id
    `;

    const uniqueWebhooks = new Map<string, WebhookSubscriber>();
    for (const webhook of results) {
      if (!uniqueWebhooks.has(webhook.id)) {
        const { priority: _priority, ...webhookData } = webhook;
        uniqueWebhooks.set(webhook.id, webhookData);
      }
    }

    return Array.from(uniqueWebhooks.values());
  }

  async getWebhookById(id: string): Promise<WebhookSubscriber | null> {
    const webhook = await this.prisma.webhook.findUnique({
      where: { id },
      select: {
        id: true,
        subscriberUrl: true,
        payloadTemplate: true,
        appId: true,
        secret: true,
        time: true,
        timeUnit: true,
        eventTriggers: true,
      },
    });

    if (!webhook) return null;

    return {
      id: webhook.id,
      subscriberUrl: webhook.subscriberUrl,
      payloadTemplate: webhook.payloadTemplate,
      appId: webhook.appId,
      secret: webhook.secret,
      time: webhook.time,
      timeUnit: webhook.timeUnit as TimeUnit | null,
      eventTriggers: webhook.eventTriggers,
    };
  }
}

export const webhookRepository = withReporting(
  (options: GetSubscribersOptions) => new WebhookRepository().getSubscribers(options),
  "WebhookRepository.getSubscribers"
);