import { Controller, Post, Body, Headers, Logger } from '@nestjs/common';
import { PlatformGraphqlService } from '../platform/platform-graphql.service';
import { ConfigService } from '@nestjs/config';

@Controller('webhooks/ozonetel')
export class MissedCallWebhookController {
    private readonly logger = new Logger(MissedCallWebhookController.name);
    private readonly apiKey: string;

    constructor(
        private readonly platform: PlatformGraphqlService,
        private readonly config: ConfigService,
    ) {
        this.apiKey = config.get<string>('platform.apiKey') ?? '';
    }

    @Post('missed-call')
    async handleCallWebhook(@Body() body: Record<string, any>) {
        // Ozonetel sends the payload as a JSON string inside a "data" field
        let payload: Record<string, any>;
        try {
            payload = typeof body.data === 'string' ? JSON.parse(body.data) : body;
        } catch {
            payload = body;
        }

        this.logger.log(`Call webhook: ${payload.CallerID} | ${payload.Status} | ${payload.Type}`);

        const callerPhone = (payload.CallerID ?? '').replace(/^\+?91/, '');
        const status = payload.Status; // NotAnswered, Answered, Abandoned
        const type = payload.Type; // InBound, OutBound
        const startTime = payload.StartTime;
        const endTime = payload.EndTime;
        const duration = this.parseDuration(payload.CallDuration ?? '00:00:00');
        const agentName = payload.AgentName ?? null;
        const recordingUrl = payload.AudioFile ?? null;
        const ucid = payload.monitorUCID ?? null;
        const disposition = payload.Disposition ?? null;
        const hangupBy = payload.HangupBy ?? null;

        if (!callerPhone) {
            this.logger.warn('No caller phone in webhook — skipping');
            return { received: true, processed: false };
        }

        // Determine call status for our platform
        const callStatus = status === 'Answered' ? 'COMPLETED' : 'MISSED';
        const direction = type === 'InBound' ? 'INBOUND' : 'OUTBOUND';

        // Use API key auth for server-to-server writes
        const authHeader = this.apiKey ? `Bearer ${this.apiKey}` : '';
        if (!authHeader) {
            this.logger.warn('No PLATFORM_API_KEY configured — cannot write call records');
            return { received: true, processed: false };
        }

        try {
            // Step 1: Create call record
            const callId = await this.createCall({
                callerPhone,
                direction,
                callStatus,
                agentName,
                startTime,
                endTime,
                duration,
                recordingUrl,
                disposition,
                ucid,
            }, authHeader);

            this.logger.log(`Created call record: ${callId} (${callStatus})`);

            // Step 2: Find matching lead by phone number
            const lead = await this.findLeadByPhone(callerPhone, authHeader);

            if (lead) {
                // Step 3: Link call to lead
                await this.updateCall(callId, { leadId: lead.id }, authHeader);

                // Step 4: Create lead activity
                const summary = callStatus === 'MISSED'
                    ? `Missed inbound call from ${callerPhone} (${duration}s, ${hangupBy ?? 'unknown'})`
                    : `Inbound call from ${callerPhone} — ${duration}s, ${disposition || 'no disposition'}`;

                await this.createLeadActivity({
                    leadId: lead.id,
                    activityType: callStatus === 'MISSED' ? 'CALL_RECEIVED' : 'CALL_RECEIVED',
                    summary,
                    channel: 'PHONE',
                    performedBy: agentName ?? 'System',
                    durationSeconds: duration,
                    outcome: callStatus === 'MISSED' ? 'NO_ANSWER' : 'SUCCESSFUL',
                }, authHeader);

                // Step 5: Update lead contact timestamps
                await this.updateLead(lead.id, {
                    lastContacted: startTime ? new Date(startTime).toISOString() : new Date().toISOString(),
                    contactAttempts: (lead.contactAttempts ?? 0) + 1,
                }, authHeader);

                this.logger.log(`Linked call to lead ${lead.id} (${lead.name}), activity created`);
            } else {
                this.logger.log(`No matching lead for ${callerPhone} — call record created without lead link`);
            }

            return { received: true, processed: true, callId, leadId: lead?.id ?? null };
        } catch (err: any) {
            const responseData = err?.response?.data ? JSON.stringify(err.response.data) : '';
            this.logger.error(`Webhook processing failed: ${err.message} ${responseData}`);
            return { received: true, processed: false, error: String(err) };
        }
    }

    private async createCall(data: {
        callerPhone: string;
        direction: string;
        callStatus: string;
        agentName: string | null;
        startTime: string | null;
        endTime: string | null;
        duration: number;
        recordingUrl: string | null;
        disposition: string | null;
        ucid: string | null;
    }, authHeader: string): Promise<string> {
        const callData: Record<string, any> = {
            name: `${data.direction === 'INBOUND' ? 'Inbound' : 'Outbound'} — ${data.callerPhone}`,
            direction: data.direction,
            callStatus: data.callStatus,
            callerNumber: { primaryPhoneNumber: `+91${data.callerPhone}` },
            agentName: data.agentName,
            startedAt: data.startTime ? new Date(data.startTime).toISOString() : null,
            endedAt: data.endTime ? new Date(data.endTime).toISOString() : null,
            durationSec: data.duration,
            disposition: this.mapDisposition(data.disposition),
        };
        // Set callback tracking fields for missed calls so they appear in the worklist
        if (data.callStatus === 'MISSED') {
            callData.callbackstatus = 'PENDING_CALLBACK';
            callData.missedcallcount = 1;
        }
        if (data.recordingUrl) {
            callData.recording = { primaryLinkUrl: data.recordingUrl, primaryLinkLabel: 'Recording' };
        }

        const result = await this.platform.queryWithAuth<any>(
            `mutation($data: CallCreateInput!) { createCall(data: $data) { id } }`,
            { data: callData },
            authHeader,
        );
        return result.createCall.id;
    }

    private async findLeadByPhone(phone: string, authHeader: string): Promise<{ id: string; name: string; contactAttempts: number } | null> {
        const result = await this.platform.queryWithAuth<any>(
            `{ leads(first: 50) { edges { node { id name contactPhone { primaryPhoneNumber } contactAttempts lastContacted } } } }`,
            undefined,
            authHeader,
        );
        const leads = result.leads.edges.map((e: any) => e.node);
        const cleanPhone = phone.replace(/\D/g, '');

        return leads.find((l: any) => {
            const lp = (l.contactPhone?.primaryPhoneNumber ?? '').replace(/\D/g, '');
            return lp.endsWith(cleanPhone) || cleanPhone.endsWith(lp);
        }) ?? null;
    }

    private async updateCall(callId: string, data: Record<string, any>, authHeader: string): Promise<void> {
        await this.platform.queryWithAuth<any>(
            `mutation($id: UUID!, $data: CallUpdateInput!) { updateCall(id: $id, data: $data) { id } }`,
            { id: callId, data },
            authHeader,
        );
    }

    private async createLeadActivity(data: {
        leadId: string;
        activityType: string;
        summary: string;
        channel: string;
        performedBy: string;
        durationSeconds: number;
        outcome: string;
    }, authHeader: string): Promise<void> {
        await this.platform.queryWithAuth<any>(
            `mutation($data: LeadActivityCreateInput!) { createLeadActivity(data: $data) { id } }`,
            {
                data: {
                    name: data.summary.substring(0, 80),
                    activityType: data.activityType,
                    summary: data.summary,
                    occurredAt: new Date().toISOString(),
                    performedBy: data.performedBy,
                    channel: data.channel,
                    durationSec: data.durationSeconds,
                    outcome: data.outcome,
                    leadId: data.leadId,
                },
            },
            authHeader,
        );
    }

    private async updateLead(leadId: string, data: Record<string, any>, authHeader: string): Promise<void> {
        await this.platform.queryWithAuth<any>(
            `mutation($id: UUID!, $data: LeadUpdateInput!) { updateLead(id: $id, data: $data) { id } }`,
            { id: leadId, data },
            authHeader,
        );
    }

    private parseDuration(timeStr: string): number {
        const parts = timeStr.split(':').map(Number);
        if (parts.length === 3) return parts[0] * 3600 + parts[1] * 60 + parts[2];
        if (parts.length === 2) return parts[0] * 60 + parts[1];
        return parseInt(timeStr) || 0;
    }

    private mapDisposition(disposition: string | null): string | null {
        if (!disposition) return null;
        const map: Record<string, string> = {
            'General Enquiry': 'INFO_PROVIDED',
            'Appointment Booked': 'APPOINTMENT_BOOKED',
            'Follow Up': 'FOLLOW_UP_SCHEDULED',
            'Not Interested': 'CALLBACK_REQUESTED',
            'Wrong Number': 'WRONG_NUMBER',
        };
        return map[disposition] ?? null;
    }
}