import { Injectable, NotFoundException } from '@nestjs/common';
import { PrismaService } from '../prisma/prisma.service';

@Injectable()
export class ObjectService {
  constructor(private prisma: PrismaService) {}

  // Setup endpoints - Object metadata management
  async getObjectDefinitions(tenantId: string) {
    return this.prisma.objectDefinition.findMany({
      where: { tenantId },
      include: {
        fields: true,
      },
      orderBy: { label: 'asc' },
    });
  }

  async getObjectDefinition(tenantId: string, apiName: string) {
    const obj = await this.prisma.objectDefinition.findUnique({
      where: {
        tenantId_apiName: {
          tenantId,
          apiName,
        },
      },
      include: {
        fields: {
          where: { isActive: true },
          orderBy: { label: 'asc' },
        },
      },
    });

    if (!obj) {
      throw new NotFoundException(`Object ${apiName} not found`);
    }

    return obj;
  }

  async createObjectDefinition(
    tenantId: string,
    data: {
      apiName: string;
      label: string;
      pluralLabel?: string;
      description?: string;
      isSystem?: boolean;
    },
  ) {
    return this.prisma.objectDefinition.create({
      data: {
        tenantId,
        ...data,
        tableName: `custom_${data.apiName.toLowerCase()}`,
      },
    });
  }

  async createFieldDefinition(
    tenantId: string,
    objectApiName: string,
    data: {
      apiName: string;
      label: string;
      type: string;
      description?: string;
      isRequired?: boolean;
      isUnique?: boolean;
      isLookup?: boolean;
      referenceTo?: string;
      defaultValue?: string;
      options?: any;
    },
  ) {
    const obj = await this.getObjectDefinition(tenantId, objectApiName);

    return this.prisma.fieldDefinition.create({
      data: {
        objectId: obj.id,
        ...data,
      },
    });
  }

  // Runtime endpoints - CRUD operations
  async getRecords(
    tenantId: string,
    objectApiName: string,
    userId: string,
    filters?: any,
  ) {
    // For demonstration, using Account as example static object
    if (objectApiName === 'Account') {
      return this.prisma.account.findMany({
        where: {
          tenantId,
          ownerId: userId, // Basic sharing rule
          ...filters,
        },
      });
    }

    // For custom objects, you'd need dynamic query building
    // This is a simplified version
    throw new Error(`Runtime queries for ${objectApiName} not yet implemented`);
  }

  async getRecord(
    tenantId: string,
    objectApiName: string,
    recordId: string,
    userId: string,
  ) {
    if (objectApiName === 'Account') {
      const record = await this.prisma.account.findFirst({
        where: {
          id: recordId,
          tenantId,
          ownerId: userId,
        },
      });

      if (!record) {
        throw new NotFoundException('Record not found');
      }

      return record;
    }

    throw new Error(`Runtime queries for ${objectApiName} not yet implemented`);
  }

  async createRecord(
    tenantId: string,
    objectApiName: string,
    data: any,
    userId: string,
  ) {
    if (objectApiName === 'Account') {
      return this.prisma.account.create({
        data: {
          tenantId,
          ownerId: userId,
          ...data,
        },
      });
    }

    throw new Error(`Runtime queries for ${objectApiName} not yet implemented`);
  }

  async updateRecord(
    tenantId: string,
    objectApiName: string,
    recordId: string,
    data: any,
    userId: string,
  ) {
    if (objectApiName === 'Account') {
      // Verify ownership
      await this.getRecord(tenantId, objectApiName, recordId, userId);

      return this.prisma.account.update({
        where: { id: recordId },
        data,
      });
    }

    throw new Error(`Runtime queries for ${objectApiName} not yet implemented`);
  }

  async deleteRecord(
    tenantId: string,
    objectApiName: string,
    recordId: string,
    userId: string,
  ) {
    if (objectApiName === 'Account') {
      // Verify ownership
      await this.getRecord(tenantId, objectApiName, recordId, userId);

      return this.prisma.account.delete({
        where: { id: recordId },
      });
    }

    throw new Error(`Runtime queries for ${objectApiName} not yet implemented`);
  }
}