/**
 * Hail Recon integration hook.
 *
 * USE_MOCK = true  → returns mock data from mockStore (local dev, no API key needed)
 * USE_MOCK = false → calls /api/hail-proxy which forwards to Hail Recon with Basic Auth
 *
 * Flip USE_MOCK to false once:
 *   1. HAIL_RECON_ACCESS_KEY + HAIL_RECON_ACCESS_SECRET are set in Vercel env vars
 *   2. Vercel KV is connected to the project
 */

import { useState, useEffect, useCallback } from 'react';
import { MOCK_HAIL_HISTORY } from '../data/mockStore';

const USE_MOCK = false;

// ── Helpers ──────────────────────────────────────────────────────────────────

export function hailSeverity(sizeInches) {
    if (!sizeInches || sizeInches < 0.75) return 'none';
    if (sizeInches < 1.00) return 'trace';
    if (sizeInches < 1.50) return 'moderate';
    if (sizeInches < 2.00) return 'significant';
    return 'severe';
}

export function hailSeverityColor(sizeInches, mode = 'text') {
    const s = hailSeverity(sizeInches);
    const map = {
        none:        { text: 'text-zinc-400',        bg: 'bg-zinc-100 dark:bg-zinc-800',         border: 'border-zinc-200 dark:border-white/10' },
        trace:       { text: 'text-yellow-600 dark:text-yellow-400', bg: 'bg-yellow-50 dark:bg-yellow-500/10',  border: 'border-yellow-200 dark:border-yellow-500/20' },
        moderate:    { text: 'text-orange-600 dark:text-orange-400', bg: 'bg-orange-50 dark:bg-orange-500/10',  border: 'border-orange-200 dark:border-orange-500/20' },
        significant: { text: 'text-red-600 dark:text-red-400',       bg: 'bg-red-50 dark:bg-red-500/10',        border: 'border-red-200 dark:border-red-500/20' },
        severe:      { text: 'text-red-700 dark:text-red-300',       bg: 'bg-red-100 dark:bg-red-500/20',       border: 'border-red-300 dark:border-red-500/30' },
    };
    return map[s]?.[mode] ?? map.none[mode];
}

export function daysAgo(dateStr) {
    const diff = Date.now() - new Date(dateStr).getTime();
    return Math.floor(diff / (1000 * 60 * 60 * 24));
}

// ── API calls (real path) ────────────────────────────────────────────────────

async function proxyGet(endpoint, params = {}) {
    const qs = new URLSearchParams({ endpoint, ...params }).toString();
    const res = await fetch(`/api/hail-proxy?${qs}`);
    if (!res.ok) throw new Error(`Hail proxy error: ${res.status}`);
    return res.json();
}

async function proxyPost(endpoint, body) {
    const res = await fetch(`/api/hail-proxy?endpoint=${endpoint}`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(body),
    });
    if (!res.ok) throw new Error(`Hail proxy error: ${res.status}`);
    return res.json();
}

// ── Main hook: hail history for a single lead ────────────────────────────────

export function useHailHistory(leadId, lat, lng, months = 12) {
    const [history, setHistory]   = useState(null);
    const [loading, setLoading]   = useState(true);
    const [error, setError]       = useState(null);

    useEffect(() => {
        if (!leadId) return;
        let cancelled = false;
        setLoading(true);
        setError(null);

        const fetch_ = async () => {
            try {
                let data;
                if (USE_MOCK) {
                    await new Promise(r => setTimeout(r, 400));
                    data = MOCK_HAIL_HISTORY[leadId] ?? [];
                } else {
                    data = await proxyGet('ImpactDatesForLatLong', {
                        Lat: lat, Long: lng, Months: months,
                    });
                    if (!Array.isArray(data)) data = [];
                }
                if (!cancelled) setHistory(data);
            } catch (e) {
                if (!cancelled) setError(e.message);
            } finally {
                if (!cancelled) setLoading(false);
            }
        };

        fetch_();
        return () => { cancelled = true; };
    }, [leadId, lat, lng, months]);

    const hitCount = history?.length ?? 0;
    const lastHit  = history?.[0] ?? null;
    const maxSize  = history?.reduce((m, e) => Math.max(m, e.hailSize ?? 0), 0) ?? 0;

    return { history, loading, error, hitCount, lastHit, maxSize };
}

// ── Register an address for monitoring ──────────────────────────────────────

export function useRegisterAddress() {
    return useCallback(async (lead) => {
        if (USE_MOCK) {
            console.log('[HailRecon mock] registerAddress:', lead?.property?.address);
            return { success: true, AddressMarker_id: Math.floor(Math.random() * 9000000) + 1000000 };
        }
        try {
            const p = lead.property ?? {};
            const c = lead.customer ?? {};
            const urgencyToSize = { emergency: 3, high: 2, standard: 1 };
            return await proxyPost('AddressMonitoringImport2g', {
                street:                 p.address ?? '',
                city:                   p.city    ?? 'Plano',
                state:                  p.state   ?? 'TX',
                zip:                    p.zip     ?? '',
                customer_name:          c.name    ?? '',
                customer_phone:         c.phone   ?? '',
                customer_email:         c.email   ?? '',
                comment1:               '#planoRealtyCRM',
                comment2:               lead.leadType ?? '',
                address_monitoring_size: urgencyToSize[lead.urgency] ?? 1,
                status:                 'Monitoring',
                integration_partner:    2,
                latitude:               p.lat  ?? null,
                longitude:              p.lng  ?? null,
                external_key:           lead.id ?? null,
            });
        } catch (e) {
            console.warn('[HailRecon] registerAddress failed (non-fatal):', e.message);
            return null;
        }
    }, []);
}

// ── Bulk hail summaries for a list of leads (dispatch queue) ─────────────────

export function useHailSummaries(leads) {
    const [summaries, setSummaries] = useState({});
    const [loading, setLoading]     = useState(true);

    useEffect(() => {
        if (!leads?.length) { setLoading(false); return; }
        let cancelled = false;

        const fetchAll = async () => {
            setLoading(true);
            try {
                const results = {};
                if (USE_MOCK) {
                    await new Promise(r => setTimeout(r, 600));
                    leads.forEach(lead => {
                        const events = MOCK_HAIL_HISTORY[lead.id] ?? [];
                        const lastHit = events[0] ?? null;
                        const maxSize = events.reduce((m, e) => Math.max(m, e.hailSize ?? 0), 0);
                        results[lead.id] = { events, hitCount: events.length, lastHit, maxSize };
                    });
                } else {
                    await Promise.all(leads.map(async (lead) => {
                        try {
                            const p = lead.property ?? {};
                            const events = await proxyGet('ImpactDatesForLatLong', {
                                Lat: p.lat, Long: p.lng, Months: 12,
                            });
                            const arr = Array.isArray(events) ? events : [];
                            const lastHit = arr[0] ?? null;
                            const maxSize = arr.reduce((m, e) => Math.max(m, e.hailSize ?? 0), 0);
                            results[lead.id] = { events: arr, hitCount: arr.length, lastHit, maxSize };
                        } catch {
                            results[lead.id] = { events: [], hitCount: 0, lastHit: null, maxSize: 0 };
                        }
                    }));
                }
                if (!cancelled) setSummaries(results);
            } finally {
                if (!cancelled) setLoading(false);
            }
        };

        fetchAll();
        return () => { cancelled = true; };
    }, [leads]);

    return { summaries, loading };
}