import { useState } from 'react';
import { AnimatePresence, motion } from 'motion/react';

import { Button } from '@/components/base/buttons/button';
import { TopBar } from '@/components/layout/top-bar';
import { KpiCards } from '@/components/leads/kpi-cards';
import { SourceGrid } from '@/components/leads/source-grid';
import { LeadCard } from '@/components/leads/lead-card';
import { AgingWidget } from '@/components/leads/aging-widget';
import { FollowupWidget } from '@/components/leads/followup-widget';
import { AlertsWidget } from '@/components/leads/alerts-widget';
import { AssignModal } from '@/components/modals/assign-modal';
import { WhatsAppSendModal } from '@/components/modals/whatsapp-send-modal';
import { MarkSpamModal } from '@/components/modals/mark-spam-modal';
import { MergeModal } from '@/components/modals/merge-modal';
import { useLeads } from '@/hooks/use-leads';
import { useFollowUps } from '@/hooks/use-follow-ups';
import { useData } from '@/providers/data-provider';
import type { Lead, LeadSource } from '@/types/entities';

export const LeadWorkspacePage = () => {
    const [sourceFilter, setSourceFilter] = useState<LeadSource | null>(null);

    const { leads, total, updateLead } = useLeads({ source: sourceFilter ?? undefined, status: 'NEW' });
    const { leads: allLeads } = useLeads();
    const { overdue, upcoming } = useFollowUps();
    const { agents, templates } = useData();

    const displayLeads = leads.slice(0, 10);

    // Modal state
    const [isAssignOpen, setIsAssignOpen] = useState(false);
    const [isWhatsAppOpen, setIsWhatsAppOpen] = useState(false);
    const [isSpamOpen, setIsSpamOpen] = useState(false);
    const [isMergeOpen, setIsMergeOpen] = useState(false);
    const [targetLead, setTargetLead] = useState<Lead | null>(null);

    const handleAssign = (lead: Lead) => {
        setTargetLead(lead);
        setIsAssignOpen(true);
    };

    const handleMessage = (lead: Lead) => {
        setTargetLead(lead);
        setIsWhatsAppOpen(true);
    };

    const handleMarkSpam = (lead: Lead) => {
        setTargetLead(lead);
        setIsSpamOpen(true);
    };

    const handleMerge = (lead: Lead) => {
        setTargetLead(lead);
        setIsMergeOpen(true);
    };

    const handleLogCall = () => {
        // placeholder
    };

    const handleUpdateStatus = () => {
        // placeholder
    };

    return (
        <div className="flex flex-1 flex-col">
            <TopBar title="Lead Workspace" subtitle="Global Hospital · Last 24 hours" />
            <div className="flex flex-1 overflow-hidden">
                {/* Main content */}
                <div className="flex-1 space-y-6 overflow-y-auto p-7">
                    <KpiCards leads={allLeads} />

                    <div>
                        <div className="mb-3 flex items-center justify-between">
                            <h2 className="font-display text-md font-bold text-primary">Lead Sources</h2>
                            <span className="text-xs text-quaternary">Click to filter</span>
                        </div>
                        <SourceGrid leads={allLeads} onSourceFilter={setSourceFilter} activeSource={sourceFilter} />
                    </div>

                    <div>
                        <div className="mb-3.5 flex items-center justify-between">
                            <h2 className="font-display text-md font-bold text-primary">New Leads</h2>
                            <Button
                                href={sourceFilter ? `/leads?source=${sourceFilter}` : '/leads'}
                                color="link-color"
                                size="sm"
                            >
                                View All {total} Leads →
                            </Button>
                        </div>
                        <div className="space-y-2">
                            <AnimatePresence>
                                {displayLeads.map((lead) => (
                                    <motion.div
                                        key={lead.id}
                                        initial={{ opacity: 1, x: 0 }}
                                        exit={{ opacity: 0, x: -20, height: 0, marginBottom: 0 }}
                                        transition={{ duration: 0.3 }}
                                    >
                                        <LeadCard
                                            lead={lead}
                                            onAssign={handleAssign}
                                            onMessage={handleMessage}
                                            onMarkSpam={handleMarkSpam}
                                            onMerge={handleMerge}
                                            onLogCall={handleLogCall}
                                            onUpdateStatus={handleUpdateStatus}
                                        />
                                    </motion.div>
                                ))}
                            </AnimatePresence>
                            {displayLeads.length === 0 && (
                                <p className="py-8 text-center text-sm text-tertiary">
                                    No leads match the current filters.
                                </p>
                            )}
                        </div>
                    </div>
                </div>

                {/* Right sidebar */}
                <aside className="hidden w-80 space-y-5 overflow-y-auto border-l border-secondary bg-primary p-5 xl:block">
                    <AgingWidget leads={allLeads} />
                    <FollowupWidget overdue={overdue} upcoming={upcoming} />
                    <AlertsWidget leads={allLeads} />
                </aside>
            </div>

            {/* Modals */}
            {targetLead && (
                <>
                    <AssignModal
                        isOpen={isAssignOpen}
                        onOpenChange={setIsAssignOpen}
                        selectedLeads={[targetLead]}
                        agents={agents}
                        onAssign={(agentId) => {
                            updateLead(targetLead.id, {
                                assignedAgent: agents.find((a) => a.id === agentId)?.name ?? null,
                                leadStatus: 'CONTACTED',
                            });
                            setIsAssignOpen(false);
                        }}
                    />
                    <WhatsAppSendModal
                        isOpen={isWhatsAppOpen}
                        onOpenChange={setIsWhatsAppOpen}
                        selectedLeads={[targetLead]}
                        templates={templates.filter((t) => t.approvalStatus === 'APPROVED')}
                        onSend={() => setIsWhatsAppOpen(false)}
                    />
                    <MarkSpamModal
                        isOpen={isSpamOpen}
                        onOpenChange={setIsSpamOpen}
                        lead={targetLead}
                        onConfirm={() => {
                            updateLead(targetLead.id, { isSpam: true, leadStatus: 'LOST' });
                            setIsSpamOpen(false);
                        }}
                    />
                    <MergeModal
                        isOpen={isMergeOpen}
                        onOpenChange={setIsMergeOpen}
                        primaryLead={targetLead}
                        duplicateLead={allLeads.find((l) => l.id === targetLead.duplicateOfLeadId) ?? targetLead}
                        onMerge={() => setIsMergeOpen(false)}
                        onKeepSeparate={() => setIsMergeOpen(false)}
                    />
                </>
            )}
        </div>
    );
};