import { Controller, Post, Body, Logger, Headers, HttpException } from '@nestjs/common';
import { PlatformGraphqlService } from '../platform/platform-graphql.service';
import { AiEnrichmentService } from '../ai/ai-enrichment.service';

@Controller('api/call')
export class CallLookupController {
    private readonly logger = new Logger(CallLookupController.name);

    constructor(
        private readonly platform: PlatformGraphqlService,
        private readonly ai: AiEnrichmentService,
    ) {}

    @Post('lookup')
    async lookupCaller(
        @Body() body: { phoneNumber: string },
        @Headers('authorization') authHeader: string,
    ) {
        if (!authHeader) throw new HttpException('Authorization required', 401);
        if (!body.phoneNumber) throw new HttpException('phoneNumber required', 400);

        const phone = body.phoneNumber.replace(/^0+/, '');
        this.logger.log(`Looking up caller: ${phone}`);

        // Query platform for leads matching this phone number
        let lead = null;
        let activities: any[] = [];

        try {
            lead = await this.platform.findLeadByPhoneWithToken(phone, authHeader);
        } catch (err) {
            this.logger.warn(`Lead lookup failed: ${err}`);
        }

        if (lead) {
            this.logger.log(`Matched lead: ${lead.id} — ${lead.contactName?.firstName} ${lead.contactName?.lastName}`);

            // Get recent activities
            try {
                activities = await this.platform.getLeadActivitiesWithToken(lead.id, authHeader, 5);
            } catch (err) {
                this.logger.warn(`Activity fetch failed: ${err}`);
            }

            // AI enrichment if no existing summary
            if (!lead.aiSummary) {
                try {
                    const enrichment = await this.ai.enrichLead({
                        firstName: lead.contactName?.firstName,
                        lastName: lead.contactName?.lastName,
                        leadSource: lead.leadSource ?? undefined,
                        interestedService: lead.interestedService ?? undefined,
                        leadStatus: lead.leadStatus ?? undefined,
                        contactAttempts: lead.contactAttempts ?? undefined,
                        createdAt: lead.createdAt,
                        activities: activities.map((a: any) => ({
                            activityType: a.activityType ?? '',
                            summary: a.summary ?? '',
                        })),
                    });

                    lead.aiSummary = enrichment.aiSummary;
                    lead.aiSuggestedAction = enrichment.aiSuggestedAction;

                    // Persist AI enrichment back to platform
                    try {
                        await this.platform.updateLeadWithToken(lead.id, {
                            aiSummary: enrichment.aiSummary,
                            aiSuggestedAction: enrichment.aiSuggestedAction,
                        }, authHeader);
                    } catch (err) {
                        this.logger.warn(`Failed to persist AI enrichment: ${err}`);
                    }
                } catch (err) {
                    this.logger.warn(`AI enrichment failed: ${err}`);
                }
            }
        } else {
            this.logger.log(`No lead found for phone ${phone}`);
        }

        return {
            lead,
            activities,
            matched: lead !== null,
        };
    }
}