import { Controller, Post, Get, Body, Query, Logger, HttpException } from '@nestjs/common';
import { OzonetelAgentService } from './ozonetel-agent.service';
import { MissedQueueService } from '../worklist/missed-queue.service';
import { PlatformGraphqlService } from '../platform/platform-graphql.service';
import { EventBusService } from '../events/event-bus.service';
import { Topics } from '../events/event-types';
import { TelephonyConfigService } from '../config/telephony-config.service';
import { SupervisorService } from '../supervisor/supervisor.service';

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

    constructor(
        private readonly ozonetelAgent: OzonetelAgentService,
        private readonly telephony: TelephonyConfigService,
        private readonly missedQueue: MissedQueueService,
        private readonly platform: PlatformGraphqlService,
        private readonly eventBus: EventBusService,
        private readonly supervisor: SupervisorService,
    ) {}

    // Read-through accessors so admin updates take effect immediately.
    private get defaultAgentId(): string {
        return this.telephony.getConfig().ozonetel.agentId || 'agent3';
    }
    private get defaultAgentPassword(): string {
        return this.telephony.getConfig().ozonetel.agentPassword;
    }
    private get defaultSipId(): string {
        return this.telephony.getConfig().ozonetel.sipId || '521814';
    }

    @Post('agent-login')
    async agentLogin(
        @Body() body: { agentId: string; password: string; phoneNumber: string; mode?: string },
    ) {
        this.logger.log(`Agent login request for ${body.agentId}`);

        try {
            const result = await this.ozonetelAgent.loginAgent(body);
            return result;
        } catch (error: any) {
            throw new HttpException(
                error.response?.data?.message ?? 'Agent login failed',
                error.response?.status ?? 500,
            );
        }
    }

    @Post('agent-logout')
    async agentLogout(
        @Body() body: { agentId: string; password: string },
    ) {
        this.logger.log(`Agent logout request for ${body.agentId}`);

        try {
            const result = await this.ozonetelAgent.logoutAgent(body);
            return result;
        } catch (error: any) {
            throw new HttpException(
                error.response?.data?.message ?? 'Agent logout failed',
                error.response?.status ?? 500,
            );
        }
    }

    @Post('agent-state')
    async agentState(
        @Body() body: { state: 'Ready' | 'Pause'; pauseReason?: string },
    ) {
        if (!body.state) {
            throw new HttpException('state required', 400);
        }

        this.logger.log(`[AGENT-STATE] ${this.defaultAgentId} → ${body.state} (${body.pauseReason ?? 'none'})`);

        try {
            const result = await this.ozonetelAgent.changeAgentState({
                agentId: this.defaultAgentId,
                state: body.state,
                pauseReason: body.pauseReason,
            });
            this.logger.log(`[AGENT-STATE] Ozonetel response: ${JSON.stringify(result)}`);

            // Auto-assign missed call when agent goes Ready
            if (body.state === 'Ready') {
                try {
                    const assigned = await this.missedQueue.assignNext(this.defaultAgentId);
                    if (assigned) {
                        this.logger.log(`[AGENT-STATE] Auto-assigned missed call ${assigned.id}`);
                        return { ...result, assignedCall: assigned };
                    }
                } catch (err) {
                    this.logger.warn(`[AGENT-STATE] Auto-assignment on Ready failed: ${err}`);
                }
            }

            return result;
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'State change failed';
            const responseData = error.response?.data ? JSON.stringify(error.response.data) : '';
            this.logger.error(`[AGENT-STATE] FAILED: ${message} ${responseData}`);
            return { status: 'error', message };
        }
    }

    // force-ready moved to /api/maint/force-ready

    @Post('dispose')
    async dispose(
        @Body() body: {
            ucid: string;
            disposition: string;
            agentId?: string;
            callerPhone?: string;
            direction?: string;
            durationSec?: number;
            leadId?: string;
            notes?: string;
            missedCallId?: string;
        },
    ) {
        if (!body.ucid || !body.disposition) {
            throw new HttpException('ucid and disposition required', 400);
        }

        const agentId = body.agentId ?? this.defaultAgentId;
        const ozonetelDisposition = this.mapToOzonetelDisposition(body.disposition);

        // Cancel the ACW auto-dispose timer — the frontend submitted disposition
        this.supervisor.cancelAcwTimer(agentId);

        this.logger.log(`[DISPOSE] ucid=${body.ucid} disposition=${body.disposition} → ozonetel="${ozonetelDisposition}" agentId=${agentId} callerPhone=${body.callerPhone ?? 'none'} direction=${body.direction ?? 'unknown'} leadId=${body.leadId ?? 'none'}`);

        try {
            const result = await this.ozonetelAgent.setDisposition({
                agentId,
                ucid: body.ucid,
                disposition: ozonetelDisposition,
            });
            this.logger.log(`[DISPOSE] Ozonetel response: ${JSON.stringify(result)}`);
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'Disposition failed';
            const responseData = error.response?.data ? JSON.stringify(error.response.data) : '';
            this.logger.error(`[DISPOSE] FAILED: ${message} ${responseData}`);
        }

        // Create call record for outbound calls. Inbound calls are
        // created by the webhook — but we skip outbound in the webhook
        // (they're not "missed calls"). So the dispose endpoint is the
        // only place that creates the call record for outbound dials.
        if (body.direction === 'OUTBOUND' && body.callerPhone) {
            try {
                const callData: Record<string, any> = {
                    name: `Outbound — ${body.callerPhone}`,
                    direction: 'OUTBOUND',
                    callStatus: 'COMPLETED',
                    callerNumber: { primaryPhoneNumber: `+91${body.callerPhone.replace(/^\+?91/, '')}` },
                    agentName: agentId,
                    durationSec: body.durationSec ?? 0,
                    disposition: body.disposition,
                };
                if (body.leadId) callData.leadId = body.leadId;

                const apiKey = process.env.PLATFORM_API_KEY;
                if (apiKey) {
                    const result = await this.platform.queryWithAuth<any>(
                        `mutation($data: CallCreateInput!) { createCall(data: $data) { id } }`,
                        { data: callData },
                        `Bearer ${apiKey}`,
                    );
                    this.logger.log(`[DISPOSE] Created outbound call record: ${result.createCall.id}`);
                }
            } catch (err: any) {
                this.logger.warn(`[DISPOSE] Failed to create outbound call record: ${err.message}`);
            }
        }

        // Handle missed call callback status update
        if (body.missedCallId) {
            const statusMap: Record<string, string> = {
                APPOINTMENT_BOOKED: 'CALLBACK_COMPLETED',
                INFO_PROVIDED: 'CALLBACK_COMPLETED',
                FOLLOW_UP_SCHEDULED: 'CALLBACK_COMPLETED',
                CALLBACK_REQUESTED: 'CALLBACK_COMPLETED',
                WRONG_NUMBER: 'WRONG_NUMBER',
            };
            const newStatus = statusMap[body.disposition];
            if (newStatus) {
                try {
                    await this.platform.query<any>(
                        `mutation { updateCall(id: "${body.missedCallId}", data: { callbackStatus: ${newStatus} }) { id } }`,
                    );
                } catch (err) {
                    this.logger.warn(`Failed to update missed call status: ${err}`);
                }
            }
        }

        // Auto-assign next missed call to this agent
        try {
            await this.missedQueue.assignNext(this.defaultAgentId);
        } catch (err) {
            this.logger.warn(`Auto-assignment after dispose failed: ${err}`);
        }

        // Emit event for downstream processing (AI insights, metrics, etc.)
        this.eventBus.emit(Topics.CALL_COMPLETED, {
            callId: null,
            ucid: body.ucid,
            agentId: this.defaultAgentId,
            callerPhone: body.callerPhone ?? '',
            direction: body.direction ?? 'INBOUND',
            durationSec: body.durationSec ?? 0,
            disposition: body.disposition,
            leadId: body.leadId ?? null,
            notes: body.notes ?? null,
            timestamp: new Date().toISOString(),
        }).catch(() => {});

        return { status: 'ok' };
    }

    @Post('dial')
    async dial(
        @Body() body: { phoneNumber: string; agentId?: string; campaignName?: string; leadId?: string },
    ) {
        if (!body.phoneNumber) {
            throw new HttpException('phoneNumber required', 400);
        }

        const agentId = body.agentId ?? this.defaultAgentId;
        const did = this.telephony.getConfig().ozonetel.did;
        const campaignName = body.campaignName
            || this.telephony.getConfig().ozonetel.campaignName
            || (did ? `Inbound_${did}` : '');

        if (!campaignName) {
            throw new HttpException('Campaign name not configured — set in Telephony settings or pass campaignName', 400);
        }

        this.logger.log(`[DIAL] phone=${body.phoneNumber} campaign=${campaignName} agentId=${agentId} lead=${body.leadId ?? 'none'}`);

        try {
            const result = await this.ozonetelAgent.manualDial({
                agentId,
                campaignName,
                customerNumber: body.phoneNumber,
            });
            return result;
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'Dial failed';
            throw new HttpException(message, error.response?.status ?? 502);
        }
    }

    @Post('call-control')
    async callControl(
        @Body() body: {
            action: 'CONFERENCE' | 'HOLD' | 'UNHOLD' | 'MUTE' | 'UNMUTE' | 'KICK_CALL';
            ucid: string;
            conferenceNumber?: string;
        },
    ) {
        if (!body.action || !body.ucid) {
            throw new HttpException('action and ucid required', 400);
        }
        if (body.action === 'CONFERENCE' && !body.conferenceNumber) {
            throw new HttpException('conferenceNumber required for CONFERENCE action', 400);
        }

        this.logger.log(`Call control: ${body.action} ucid=${body.ucid}`);

        try {
            const result = await this.ozonetelAgent.callControl(body);
            return result;
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'Call control failed';
            throw new HttpException(message, error.response?.status ?? 502);
        }
    }

    @Post('recording')
    async recording(
        @Body() body: { ucid: string; action: 'pause' | 'unPause' },
    ) {
        if (!body.ucid || !body.action) {
            throw new HttpException('ucid and action required', 400);
        }

        try {
            const result = await this.ozonetelAgent.pauseRecording(body);
            return result;
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'Recording control failed';
            throw new HttpException(message, error.response?.status ?? 502);
        }
    }

    @Get('missed-calls')
    async missedCalls() {
        const result = await this.ozonetelAgent.getAbandonCalls();
        return result;
    }

    @Get('call-history')
    async callHistory(
        @Query('date') date?: string,
        @Query('status') status?: string,
        @Query('callType') callType?: string,
    ) {
        const targetDate = date ?? new Date().toISOString().split('T')[0];
        this.logger.log(`Call history: date=${targetDate} status=${status ?? 'all'} type=${callType ?? 'all'}`);

        const result = await this.ozonetelAgent.fetchCDR({
            date: targetDate,
            status,
            callType,
        });
        return result;
    }

    @Get('performance')
    async performance(@Query('date') date?: string, @Query('agentId') agentId?: string) {
        const agent = agentId ?? this.defaultAgentId;
        const targetDate = date ?? new Date().toISOString().split('T')[0];
        this.logger.log(`Performance: date=${targetDate} agent=${agent}`);

        const [cdr, summary, aht] = await Promise.all([
            this.ozonetelAgent.fetchCDR({ date: targetDate }),
            this.ozonetelAgent.getAgentSummary(agent, targetDate),
            this.ozonetelAgent.getAHT(agent),
        ]);

        // Filter CDR to this agent only — fetchCDR returns all agents' calls
        const agentCdr = cdr.filter((c: any) => c.AgentID === agent || c.AgentName === agent);

        const totalCalls = agentCdr.length;
        const inbound = agentCdr.filter((c: any) => c.Type === 'InBound').length;
        const outbound = agentCdr.filter((c: any) => c.Type === 'Manual' || c.Type === 'Progressive').length;
        const answered = agentCdr.filter((c: any) => c.Status === 'Answered').length;
        const missed = agentCdr.filter((c: any) => c.Status === 'NotAnswered').length;

        const talkTimes = agentCdr
            .filter((c: any) => c.TalkTime && c.TalkTime !== '00:00:00')
            .map((c: any) => {
                const parts = c.TalkTime.split(':').map(Number);
                return parts[0] * 3600 + parts[1] * 60 + parts[2];
            });
        const avgTalkTimeSec = talkTimes.length > 0
            ? Math.round(talkTimes.reduce((a: number, b: number) => a + b, 0) / talkTimes.length)
            : 0;

        const dispositions: Record<string, number> = {};
        for (const c of agentCdr) {
            const d = (c as any).Disposition || 'No Disposition';
            dispositions[d] = (dispositions[d] ?? 0) + 1;
        }

        const appointmentsBooked = agentCdr.filter((c: any) =>
            c.Disposition?.toLowerCase().includes('appointment'),
        ).length;

        return {
            date: targetDate,
            calls: { total: totalCalls, inbound, outbound, answered, missed },
            avgTalkTimeSec,
            avgHandlingTime: aht,
            conversionRate: totalCalls > 0 ? Math.round((appointmentsBooked / totalCalls) * 100) : 0,
            appointmentsBooked,
            timeUtilization: summary,
            dispositions,
        };
    }

    private mapToOzonetelDisposition(disposition: string): string {
        // Campaign only has 'General Enquiry' configured currently
        const map: Record<string, string> = {
            'APPOINTMENT_BOOKED': 'General Enquiry',
            'FOLLOW_UP_SCHEDULED': 'General Enquiry',
            'INFO_PROVIDED': 'General Enquiry',
            'NO_ANSWER': 'General Enquiry',
            'WRONG_NUMBER': 'General Enquiry',
            'CALLBACK_REQUESTED': 'General Enquiry',
        };
        return map[disposition] ?? 'General Enquiry';
    }
}