import { Body, Controller, Delete, Get, HttpCode, IsArray, IsOptional, IsString, NotFoundException, Param, ParseUUIDPipe, Patch, Post, Query } from '@nestjs/common';
import { and, desc, eq, isNull } from 'drizzle-orm';
import { CurrentSession } from '../auth/session.decorator';
import type { AuthenticatedSession } from '../auth/tenant.guard';
import { db } from '../db/client';
import { contacts } from '../db/schema';

class CreateContactDto {
  @IsString() fullName!: string;
  @IsOptional() @IsString() email?: string;
  @IsOptional() @IsString() phone?: string;
  @IsOptional() @IsString() role?: string;
  @IsOptional() @IsString() organizationId?: string;
  @IsOptional() @IsString() linkedinUrl?: string;
  @IsOptional() @IsString() notes?: string;
  @IsOptional() @IsArray() tags?: string[];
  @IsOptional() @IsString() source?: string;
  @IsOptional() @IsString() consentStatus?: string;
}

class UpdateContactDto {
  @IsOptional() @IsString() fullName?: string;
  @IsOptional() @IsString() email?: string;
  @IsOptional() @IsString() phone?: string;
  @IsOptional() @IsString() role?: string;
  @IsOptional() @IsString() organizationId?: string;
  @IsOptional() @IsString() linkedinUrl?: string;
  @IsOptional() @IsString() notes?: string;
  @IsOptional() @IsArray() tags?: string[];
  @IsOptional() @IsString() consentStatus?: string;
}

@Controller('contacts')
export class ContactsController {
  @Get()
  async list(@CurrentSession() session: AuthenticatedSession, @Query('limit') limitStr?: string) {
    const limit = Math.min(Math.max(1, parseInt(limitStr ?? '200', 10) || 200), 500);
    return db.query.contacts.findMany({
      where: and(eq(contacts.tenantId, session.tenantId), isNull(contacts.deletedAt)),
      orderBy: desc(contacts.createdAt),
      limit,
    });
  }

  @Post()
  async create(@CurrentSession() session: AuthenticatedSession, @Body() dto: CreateContactDto) {
    const [contact] = await db.insert(contacts).values({
      ...dto,
      tenantId: session.tenantId,
      tags: dto.tags ?? [],
    }).returning();
    return contact;
  }

  @Get(':id')
  async getOne(@CurrentSession() session: AuthenticatedSession, @Param('id', ParseUUIDPipe) id: string) {
    const contact = await db.query.contacts.findFirst({
      where: and(eq(contacts.id, id), eq(contacts.tenantId, session.tenantId), isNull(contacts.deletedAt)),
    });
    if (!contact) throw new NotFoundException('Contact not found');
    return contact;
  }

  @Patch(':id')
  async update(@CurrentSession() session: AuthenticatedSession, @Param('id', ParseUUIDPipe) id: string, @Body() dto: UpdateContactDto) {
    const [updated] = await db.update(contacts).set({ ...dto, updatedAt: new Date() })
      .where(and(eq(contacts.id, id), eq(contacts.tenantId, session.tenantId))).returning();
    if (!updated) throw new NotFoundException('Contact not found');
    return updated;
  }

  @Delete(':id')
  @HttpCode(204)
  async remove(@CurrentSession() session: AuthenticatedSession, @Param('id', ParseUUIDPipe) id: string) {
    await db.update(contacts).set({ deletedAt: new Date() })
      .where(and(eq(contacts.id, id), eq(contacts.tenantId, session.tenantId)));
  }
}