import { Inject, Injectable, NotFoundException } from '@nestjs/common';
import { Prisma } from '@lisglosips/database';
import { PrismaService } from '../database/prisma.service.js';

export type CdrCarrier = 'MOBILE' | 'UNICOM' | 'TELECOM' | 'BROADCAST' | 'MVNO' | 'UNKNOWN';

export interface CdrQuery {
  caller?: string;
  callee?: string;
  customerGatewayId?: string;
  vendorGatewayId?: string;
  cityCode?: string;
  carrier?: CdrCarrier;
  startedFrom?: Date;
  startedTo?: Date;
  take: number;
  skip: number;
}

export interface CdrPageMeta {
  total: number;
  take: number;
  skip: number;
  hasMore: boolean;
}

export interface CdrListItem {
  id: string;
  eventId: string;
  callId: string;
  sourceIp: string | null;
  caller: string;
  callee: string;
  rawCallee: string | null;
  businessPrefixId: string | null;
  businessPrefix: string | null;
  calleeCityCode: string | null;
  calleeCityName: string | null;
  calleeProvinceName: string | null;
  calleeOperator: CdrCarrier;
  calleeNumberType: string;
  customerId: string | null;
  customerName: string | null;
  customerGatewayId: string | null;
  customerGatewayName: string | null;
  vendorId: string | null;
  vendorName: string | null;
  vendorGatewayId: string | null;
  vendorGatewayName: string | null;
  vendorGatewayHost: string | null;
  vendorGatewayPort: number | null;
  lineGroupId: string | null;
  lineGroupName: string | null;
  landingCaller: string | null;
  landingCallee: string | null;
  startedAt: Date;
  answeredAt: Date | null;
  endedAt: Date;
  durationSec: number;
  sipCode: number;
  hangupReason: string | null;
  recordingKey: string | null;
  configVersion: number | null;
  ratingStatus: string;
  customerFee: string | null;
  vendorCost: string | null;
  grossProfit: string | null;
  billSec: number | null;
  hasRecording: boolean;
  recordingId: string | null;
  recordingStatus: string | null;
}

export interface CdrEntityRef {
  id: string;
  name: string;
  status?: string;
}

export interface CdrGatewayRef extends CdrEntityRef {
  authMode?: string;
  sourceIp?: string | null;
  host?: string;
  port?: number;
  transport?: string;
}

export interface CdrPolicyRef extends CdrEntityRef {
  priority: number;
  callerMode: string;
  callerValue: string | null;
  calleeMode: string;
  calleeValue: string | null;
}

export interface CdrRatedDetail {
  id: string;
  billSec: number;
  customerFee: string;
  vendorCost: string;
  grossProfit: string;
  customerRate: Prisma.JsonValue | null;
  vendorRate: Prisma.JsonValue | null;
  ratedAt: Date;
}

export interface CdrRecordingDetail {
  id: string;
  storageKey: string;
  sha256: string | null;
  bytes: string;
  durationSec: number;
  status: string;
  movedAt: Date | null;
  createdAt: Date;
}

export interface CdrDetail extends CdrListItem {
  customer: CdrEntityRef | null;
  customerGateway: CdrGatewayRef | null;
  customerGatewayPolicy: CdrPolicyRef | null;
  businessPrefixRef: CdrEntityRef & { prefix: string; priority: number } | null;
  vendor: CdrEntityRef | null;
  vendorGateway: CdrGatewayRef | null;
  lineGroup: CdrEntityRef | null;
  rated: CdrRatedDetail | null;
  recording: CdrRecordingDetail | null;
  payload: Prisma.JsonValue | null;
  receivedAt: Date;
  createdAt: Date;
}

export interface CdrsRepository {
  list(query: CdrQuery): Promise<{ items: CdrListItem[]; meta: CdrPageMeta }>;
  get(id: string): Promise<CdrDetail>;
}

export const CDRS_REPOSITORY = Symbol('CDRS_REPOSITORY');

type RawCdrRecord = Prisma.RawCdrGetPayload<{
  include: {
    customer: { select: { name: true } };
    customerGateway: { select: { name: true } };
    vendor: { select: { name: true } };
    vendorGateway: { select: { name: true; host: true; port: true } };
    lineGroup: { select: { name: true } };
    ratedCdr: { select: { customerFee: true; vendorCost: true; grossProfit: true; billSec: true } };
    recording: { select: { id: true; status: true } };
  };
}>;

type RawCdrDetailRecord = Prisma.RawCdrGetPayload<{
  include: {
    customer: { select: { id: true; name: true; status: true } };
    customerGateway: { select: { id: true; name: true; status: true; authMode: true; sourceIp: true } };
    customerGatewayPolicy: {
      select: {
        id: true;
        name: true;
        status: true;
        priority: true;
        callerMode: true;
        callerValue: true;
        calleeMode: true;
        calleeValue: true;
      };
    };
    businessPrefixRef: { select: { id: true; name: true; prefix: true; priority: true; status: true } };
    vendor: { select: { id: true; name: true; status: true } };
    vendorGateway: { select: { id: true; name: true; status: true; authMode: true; host: true; port: true; transport: true } };
    lineGroup: { select: { id: true; name: true; status: true } };
    ratedCdr: {
      select: {
        id: true;
        billSec: true;
        customerFee: true;
        vendorCost: true;
        grossProfit: true;
        customerRate: true;
        vendorRate: true;
        ratedAt: true;
      };
    };
    recording: {
      select: {
        id: true;
        storageKey: true;
        sha256: true;
        bytes: true;
        durationSec: true;
        status: true;
        movedAt: true;
        createdAt: true;
      };
    };
  };
}>;

@Injectable()
export class PrismaCdrsRepository implements CdrsRepository {
  constructor(@Inject(PrismaService) private readonly prisma: PrismaService) {}

  async list(query: CdrQuery): Promise<{ items: CdrListItem[]; meta: CdrPageMeta }> {
    const where = this.where(query);
    const [items, total] = await Promise.all([
      this.prisma.rawCdr.findMany({
        where,
        orderBy: [{ startedAt: 'desc' }, { id: 'desc' }],
        take: query.take,
        skip: query.skip,
        include: this.includeCdr()
      }),
      this.prisma.rawCdr.count({ where })
    ]);
    return {
      items: items.map((item) => this.toItem(item)),
      meta: {
        total,
        take: query.take,
        skip: query.skip,
        hasMore: query.skip + items.length < total
      }
    };
  }

  async get(id: string): Promise<CdrDetail> {
    const item = await this.prisma.rawCdr.findUnique({
      where: { id },
      include: this.includeDetail()
    });
    if (!item) {
      throw new NotFoundException({ code: 'CDR_NOT_FOUND', message: 'CDR not found.' });
    }
    return this.toDetail(item);
  }

  private where(query: CdrQuery): Prisma.RawCdrWhereInput {
    return {
      caller: query.caller ? { contains: query.caller } : undefined,
      callee: query.callee ? { contains: query.callee } : undefined,
      customerGatewayId: query.customerGatewayId,
      vendorGatewayId: query.vendorGatewayId,
      calleeCityCode: query.cityCode,
      calleeOperator: query.carrier,
      startedAt: query.startedFrom || query.startedTo ? { gte: query.startedFrom, lte: query.startedTo } : undefined
    };
  }

  private includeCdr() {
    return {
      customer: { select: { name: true } },
      customerGateway: { select: { name: true } },
      vendor: { select: { name: true } },
      vendorGateway: { select: { name: true, host: true, port: true } },
      lineGroup: { select: { name: true } },
      ratedCdr: { select: { customerFee: true, vendorCost: true, grossProfit: true, billSec: true } },
      recording: { select: { id: true, status: true } }
    } satisfies Prisma.RawCdrInclude;
  }

  private includeDetail() {
    return {
      customer: { select: { id: true, name: true, status: true } },
      customerGateway: { select: { id: true, name: true, status: true, authMode: true, sourceIp: true } },
      customerGatewayPolicy: {
        select: {
          id: true,
          name: true,
          status: true,
          priority: true,
          callerMode: true,
          callerValue: true,
          calleeMode: true,
          calleeValue: true
        }
      },
      businessPrefixRef: { select: { id: true, name: true, prefix: true, priority: true, status: true } },
      vendor: { select: { id: true, name: true, status: true } },
      vendorGateway: { select: { id: true, name: true, status: true, authMode: true, host: true, port: true, transport: true } },
      lineGroup: { select: { id: true, name: true, status: true } },
      ratedCdr: {
        select: {
          id: true,
          billSec: true,
          customerFee: true,
          vendorCost: true,
          grossProfit: true,
          customerRate: true,
          vendorRate: true,
          ratedAt: true
        }
      },
      recording: {
        select: {
          id: true,
          storageKey: true,
          sha256: true,
          bytes: true,
          durationSec: true,
          status: true,
          movedAt: true,
          createdAt: true
        }
      }
    } satisfies Prisma.RawCdrInclude;
  }

  private toItem(item: RawCdrRecord): CdrListItem {
    return {
      id: item.id,
      eventId: item.eventId,
      callId: item.callId,
      sourceIp: item.sourceIp,
      caller: item.caller,
      callee: item.callee,
      rawCallee: item.rawCallee,
      businessPrefixId: item.businessPrefixId,
      businessPrefix: item.businessPrefix,
      calleeCityCode: item.calleeCityCode,
      calleeCityName: item.calleeCityName,
      calleeProvinceName: item.calleeProvinceName,
      calleeOperator: item.calleeOperator,
      calleeNumberType: item.calleeNumberType,
      customerId: item.customerId,
      customerName: item.customer?.name ?? null,
      customerGatewayId: item.customerGatewayId,
      customerGatewayName: item.customerGateway?.name ?? null,
      vendorId: item.vendorId,
      vendorName: item.vendor?.name ?? null,
      vendorGatewayId: item.vendorGatewayId,
      vendorGatewayName: item.vendorGateway?.name ?? null,
      vendorGatewayHost: item.vendorGateway?.host ?? null,
      vendorGatewayPort: item.vendorGateway?.port ?? null,
      lineGroupId: item.lineGroupId,
      lineGroupName: item.lineGroup?.name ?? null,
      landingCaller: item.landingCaller,
      landingCallee: item.landingCallee,
      startedAt: item.startedAt,
      answeredAt: item.answeredAt,
      endedAt: item.endedAt,
      durationSec: item.durationSec,
      sipCode: item.sipCode,
      hangupReason: item.hangupReason,
      recordingKey: item.recordingKey,
      configVersion: item.configVersion,
      ratingStatus: item.ratingStatus,
      customerFee: item.ratedCdr?.customerFee.toFixed(6) ?? null,
      vendorCost: item.ratedCdr?.vendorCost.toFixed(6) ?? null,
      grossProfit: item.ratedCdr?.grossProfit.toFixed(6) ?? null,
      billSec: item.ratedCdr?.billSec ?? null,
      hasRecording: Boolean(item.recording),
      recordingId: item.recording?.id ?? null,
      recordingStatus: item.recording?.status ?? null
    };
  }

  private toDetail(item: RawCdrDetailRecord): CdrDetail {
    const base = this.toItem(item);
    return {
      ...base,
      customer: item.customer ? { id: item.customer.id, name: item.customer.name, status: item.customer.status } : null,
      customerGateway: item.customerGateway
        ? {
            id: item.customerGateway.id,
            name: item.customerGateway.name,
            status: item.customerGateway.status,
            authMode: item.customerGateway.authMode,
            sourceIp: item.customerGateway.sourceIp
          }
        : null,
      customerGatewayPolicy: item.customerGatewayPolicy
        ? {
            id: item.customerGatewayPolicy.id,
            name: item.customerGatewayPolicy.name,
            status: item.customerGatewayPolicy.status,
            priority: item.customerGatewayPolicy.priority,
            callerMode: item.customerGatewayPolicy.callerMode,
            callerValue: item.customerGatewayPolicy.callerValue,
            calleeMode: item.customerGatewayPolicy.calleeMode,
            calleeValue: item.customerGatewayPolicy.calleeValue
          }
        : null,
      businessPrefixRef: item.businessPrefixRef
        ? {
            id: item.businessPrefixRef.id,
            name: item.businessPrefixRef.name,
            prefix: item.businessPrefixRef.prefix,
            priority: item.businessPrefixRef.priority,
            status: item.businessPrefixRef.status
          }
        : null,
      vendor: item.vendor ? { id: item.vendor.id, name: item.vendor.name, status: item.vendor.status } : null,
      vendorGateway: item.vendorGateway
        ? {
            id: item.vendorGateway.id,
            name: item.vendorGateway.name,
            status: item.vendorGateway.status,
            authMode: item.vendorGateway.authMode,
            host: item.vendorGateway.host,
            port: item.vendorGateway.port,
            transport: item.vendorGateway.transport
          }
        : null,
      lineGroup: item.lineGroup ? { id: item.lineGroup.id, name: item.lineGroup.name, status: item.lineGroup.status } : null,
      rated: item.ratedCdr
        ? {
            id: item.ratedCdr.id,
            billSec: item.ratedCdr.billSec,
            customerFee: item.ratedCdr.customerFee.toFixed(6),
            vendorCost: item.ratedCdr.vendorCost.toFixed(6),
            grossProfit: item.ratedCdr.grossProfit.toFixed(6),
            customerRate: item.ratedCdr.customerRate,
            vendorRate: item.ratedCdr.vendorRate,
            ratedAt: item.ratedCdr.ratedAt
          }
        : null,
      recording: item.recording
        ? {
            id: item.recording.id,
            storageKey: item.recording.storageKey,
            sha256: item.recording.sha256,
            bytes: item.recording.bytes.toString(),
            durationSec: item.recording.durationSec,
            status: item.recording.status,
            movedAt: item.recording.movedAt,
            createdAt: item.recording.createdAt
          }
        : null,
      payload: item.payload,
      receivedAt: item.receivedAt,
      createdAt: item.createdAt
    };
  }
}