import {
  Controller,
  Get,
  Post,
  Param,
  Body,
  Logger,
  NotFoundException,
} from '@nestjs/common'
import { InjectRepository } from '@nestjs/typeorm'
import { Repository } from 'typeorm'

import { SubscriptionEntity } from '@/src/entities/subscription.entity'
import { SubscriptionStatus } from '@/providers/subscription.types'

/**
 * Admin Subscriptions Controller
 *
 * Administrative endpoints for managing platform subscriptions.
 * Matches frontend adminSubscriptionsApi contract.
 *
 * Routes:
 * - GET  /admin/subscriptions          — list all subscriptions
 * - POST /admin/subscriptions/:id/cancel — admin force-cancel
 */
@Controller('admin/subscriptions')
export class AdminSubscriptionsController {
  private readonly logger = new Logger(AdminSubscriptionsController.name)

  constructor(
    @InjectRepository(SubscriptionEntity)
    private readonly subscriptionRepository: Repository<SubscriptionEntity>,
  ) {}

  /**
   * GET /admin/subscriptions
   *
   * List all subscriptions with most recent first.
   */
  @Get()
  async list() {
    const subscriptions = await this.subscriptionRepository.find({
      order: { createdAt: 'DESC' },
    })
    return subscriptions
  }

  /**
   * POST /admin/subscriptions/:id/cancel
   *
   * Admin force-cancel a subscription.
   * Sets status to CANCELLED and records the cancellation timestamp.
   */
  @Post(':id/cancel')
  async cancel(
    @Param('id') id: string,
    @Body() body: { reason?: string },
  ) {
    const subscription = await this.subscriptionRepository.findOne({ where: { id } })

    if (!subscription) {
      throw new NotFoundException(`Subscription ${id} not found`)
    }

    subscription.status = SubscriptionStatus.CANCELLED
    subscription.cancelledAt = new Date()
    subscription.cancelAtPeriodEnd = false
    subscription.metadata = {
      ...subscription.metadata,
      adminCancelReason: body.reason || 'admin_force_cancel',
      adminCancelledAt: new Date().toISOString(),
    }

    const updated = await this.subscriptionRepository.save(subscription)

    this.logger.log(`Admin cancelled subscription ${id}, reason: ${body.reason || 'none provided'}`)

    return updated
  }
}