import { useMemo, useState } from 'react';
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { faSidebarFlip, faSidebar } from '@fortawesome/pro-duotone-svg-icons';
import { PageHeader } from '@/components/layout/page-header';
import { AiChatPanel } from '@/components/call-desk/ai-chat-panel';
import { DashboardKpi } from '@/components/dashboard/kpi-cards';
import { MissedQueue } from '@/components/dashboard/missed-queue';
import {
    RichAgentTable,
    TimeBreakdown,
    NpsConversion,
    PerformanceAlerts,
    useSupervisorRollup,
} from '@/components/dashboard/supervisor-rollup';
import { useData } from '@/providers/data-provider';
import { cx } from '@/utils/cx';

type DateRange = 'today' | 'week' | 'month';

const getDateRangeStart = (range: DateRange): Date => {
    const now = new Date();
    switch (range) {
        case 'today': { const s = new Date(now); s.setHours(0, 0, 0, 0); return s; }
        case 'week': { const s = new Date(now); s.setDate(s.getDate() - 7); return s; }
        case 'month': { const s = new Date(now); s.setDate(s.getDate() - 30); return s; }
    }
};

export const TeamDashboardPage = () => {
    const { calls, leads, campaigns, loading } = useData();
    const [dateRange, setDateRange] = useState<DateRange>('week');
    const [aiOpen, setAiOpen] = useState(true);

    // Pull the richer supervisor rollup (NPS, idle, time breakdown, alerts)
    // from the sidecar. Only `today`/`week`/`month` overlap with the rollup's
    // date-range semantics — map them through directly.
    const { agents: rollupAgents } = useSupervisorRollup(dateRange);

    const filteredCalls = useMemo(() => {
        const rangeStart = getDateRangeStart(dateRange);
        return calls.filter((call) => {
            if (!call.startedAt) return false;
            return new Date(call.startedAt) >= rangeStart;
        });
    }, [calls, dateRange]);

    const dateRangeLabel = dateRange === 'today' ? 'Today' : dateRange === 'week' ? 'This Week' : 'This Month';

    const convRate = useMemo(() => {
        if (filteredCalls.length === 0) return 0;
        const completed = filteredCalls.filter((c) => c.callStatus === 'COMPLETED').length;
        return Math.round((completed / filteredCalls.length) * 100);
    }, [filteredCalls]);

    const missedQueueCount = filteredCalls.filter((c) => c.callStatus === 'MISSED').length;

    return (
        <div className="flex flex-1 flex-col overflow-hidden">
            <PageHeader
                title="Team Dashboard"
                subtitle={dateRangeLabel}
                infoText="Aggregated call metrics, agent performance, and operational alerts."
                controls={
                    <>
                        <div className="flex rounded-lg border border-secondary overflow-hidden">
                            {(['today', 'week', 'month'] as const).map((range) => (
                                <button
                                    key={range}
                                    onClick={() => setDateRange(range)}
                                    className={cx(
                                        "px-3 py-1 text-xs font-medium transition duration-100 ease-linear",
                                        dateRange === range ? 'bg-active text-brand-secondary' : 'text-tertiary hover:bg-primary_hover',
                                    )}
                                >
                                    {range === 'today' ? 'Today' : range === 'week' ? 'Week' : 'Month'}
                                </button>
                            ))}
                        </div>
                        <button
                            onClick={() => setAiOpen(!aiOpen)}
                            className="flex size-8 items-center justify-center rounded-lg text-fg-quaternary hover:text-fg-secondary hover:bg-primary_hover transition duration-100 ease-linear"
                            title={aiOpen ? 'Hide AI panel' : 'Show AI panel'}
                        >
                            <FontAwesomeIcon icon={aiOpen ? faSidebarFlip : faSidebar} className="size-4" />
                        </button>
                    </>
                }
            />

            <div className="flex flex-1 overflow-hidden">
                {/* Main content — scrollable column with KPIs pinned at the
                    top, then stacked supervisor sections (Agent table, Time
                    breakdown, NPS/Conv, Alerts, Missed Queue, Campaigns).
                    No tabs: everything is scroll-visible so a supervisor
                    doesn't have to hunt across surfaces for their metrics. */}
                <div className="flex flex-1 flex-col overflow-y-auto">
                    <div className="px-6 pt-5 pb-3">
                        <DashboardKpi calls={filteredCalls} leads={leads} />
                    </div>

                    <div className="flex-1 space-y-5 px-6 pb-8">
                        {loading && rollupAgents.length === 0 ? (
                            <div className="flex items-center justify-center py-12">
                                <p className="text-sm text-tertiary">Loading...</p>
                            </div>
                        ) : (
                            <>
                                <RichAgentTable agents={rollupAgents} />

                                <TimeBreakdown agents={rollupAgents} />

                                <NpsConversion agents={rollupAgents} convRate={convRate} />

                                <PerformanceAlerts agents={rollupAgents} />

                                <div className="rounded-xl border border-secondary bg-primary p-4">
                                    <h3 className="text-sm font-semibold text-secondary mb-3">
                                        Missed Queue ({missedQueueCount})
                                    </h3>
                                    <MissedQueue calls={filteredCalls} />
                                </div>

                                <div className="rounded-xl border border-secondary bg-primary p-4">
                                    <h3 className="text-sm font-semibold text-secondary mb-3">
                                        Campaigns ({campaigns.length})
                                    </h3>
                                    {campaigns.length === 0 ? (
                                        <p className="text-sm text-tertiary py-4 text-center">No campaigns</p>
                                    ) : (
                                        <div className="space-y-3">
                                            {campaigns.map((c) => (
                                                <div key={c.id} className="flex items-center justify-between rounded-lg border border-secondary bg-primary p-4">
                                                    <div>
                                                        <span className="text-sm font-semibold text-primary">{c.campaignName}</span>
                                                        <div className="flex items-center gap-3 mt-1 text-xs text-tertiary">
                                                            <span>{c.campaignStatus}</span>
                                                            <span>{c.platform}</span>
                                                            <span>{c.leadCount} leads</span>
                                                            <span>{c.convertedCount} converted</span>
                                                        </div>
                                                    </div>
                                                    {c.budget && (
                                                        <span className="text-sm font-medium text-secondary">
                                                            ₹{Math.round(c.budget.amountMicros / 1_000_000).toLocaleString()}
                                                        </span>
                                                    )}
                                                </div>
                                            ))}
                                        </div>
                                    )}
                                </div>
                            </>
                        )}
                    </div>
                </div>

                {/* AI panel — collapsible */}
                <div className={cx(
                    "shrink-0 border-l border-secondary bg-primary flex flex-col overflow-hidden transition-all duration-200 ease-linear",
                    aiOpen ? "w-[380px]" : "w-0 border-l-0",
                )}>
                    {aiOpen && (
                        <div className="flex h-full flex-col p-4">
                            <AiChatPanel callerContext={{ type: 'supervisor' }} />
                        </div>
                    )}
                </div>
            </div>

        </div>
    );
};
