/**
 * Foodlinkk Intelligence Analytics hub
 */
function analyticsHub() {
  const charts = {};

  function destroyCharts() {
    Object.keys(charts).forEach((k) => {
      try { charts[k].destroy(); } catch (e) {}
      delete charts[k];
    });
  }

  function euro(n) {
    const v = Math.round(Number(n || 0));
    return '€' + v.toLocaleString('nl-NL');
  }

  return {
    loading: false,
    showFilters: false,
    updatedAt: '—',
    liveLabel: 'Live',
    f: { chain: '', province: '', stage: '', agent: '', days: 90 },
    meta: {},
    data: {},
    kpis: {},
    pulse: { wins: [], opportunities: [], attention: [], score: 0 },
    findings: [],
    goals: {},
    signals: [],
    _pollStop: null,

    fmt(n) {
      return Number(n || 0).toLocaleString('nl-NL');
    },

    formatTime(iso) {
      if (!iso) return '';
      try {
        return new Date(iso).toLocaleString('nl-NL', { dateStyle: 'short', timeStyle: 'short' });
      } catch (e) {
        return String(iso).slice(0, 16).replace('T', ' ');
      }
    },

    shortGoal(t) {
      const s = String(t || '').replace(/\s+/g, ' ').trim();
      return s.length > 90 ? s.slice(0, 87) + '…' : s;
    },

    ringDash(score) {
      const s = Math.max(0, Math.min(100, Number(score || 0)));
      const c = 2 * Math.PI * 52;
      return ((s / 100) * c).toFixed(1);
    },

    applyData(payload) {
      this.data = payload || {};
      this.kpis = this.data.kpis || {};
      this.pulse = this.data.pulse || { wins: [], opportunities: [], attention: [], score: 0 };
      this.findings = this.data.hermes_findings || [];
      this.goals = this.data.goals || {};
      this.meta = this.data.filter_meta || this.meta;
      this.updatedAt = (this.data.generated_at || '').substring(0, 19).replace('T', ' ') || '—';
      this.signals = [
        { key: 'margin', label: 'Marge / mnd', value: euro(this.kpis.margin_month), hint: (this.kpis.active_projects || 0) + ' deals', tone: 'good' },
        { key: 'partners', label: 'CRM actief', value: this.fmt(this.kpis.crm_partnerships), hint: (this.pulse.cover_pct || 0) + '% dekking', tone: 'good' },
        { key: 'gap', label: 'White space', value: this.fmt(this.pulse.white_space), hint: 'winkels zonder partnership', tone: 'warn' },
        { key: 'stores', label: 'Supermarkten', value: this.fmt(this.kpis.supermarkets), hint: this.fmt(this.kpis.wholesalers) + ' groothandels' },
        { key: 'rss', label: 'Markt signalen', value: this.fmt(this.kpis.rss_items), hint: this.fmt(this.kpis.promo_campaigns) + ' promo’s' },
        { key: 'agents', label: 'Agent events', value: this.fmt(this.kpis.agent_events), hint: this.fmt(this.kpis.pending_approvals) + ' approvals', tone: this.kpis.pending_approvals ? 'warn' : '' },
      ];
      this.$nextTick(() => this.renderCharts());
    },

    init() {
      this.applyData(window.ANALYTICS_INITIAL || {});
      if (window.CockpitLive && CockpitLive.startPolling) {
        this._pollStop = CockpitLive.startPolling(() => this.refresh(false), 45000);
      } else {
        this._pollStop = setInterval(() => this.refresh(false), 45000);
      }
    },

    params() {
      const p = new URLSearchParams();
      Object.entries(this.f).forEach(([k, v]) => {
        if (v !== null && v !== '' && v !== undefined) p.set(k, v);
      });
      return p.toString();
    },

    async refresh(toast) {
      this.loading = true;
      try {
        const data = await fetch('/analytics/api/data?' + this.params()).then((r) => r.json());
        this.applyData(data);
        if (toast !== false && window.Cockpit) Cockpit.toast('Intelligence bijgewerkt', 'success');
      } catch (e) {
        if (toast !== false && window.Cockpit) Cockpit.toast(e.message || 'Laden mislukt', 'error');
      } finally {
        this.loading = false;
      }
    },

    resetFilters() {
      this.f = { chain: '', province: '', stage: '', agent: '', days: 90 };
      this.refresh();
    },

    renderCharts() {
      if (typeof Chart === 'undefined') return;
      destroyCharts();
      const grid = 'rgba(148,163,184,0.12)';
      const tick = '#94a3b8';
      const d = this.data;

      const mk = (id, cfg) => {
        const el = document.getElementById(id);
        if (!el) return;
        charts[id] = new Chart(el, cfg);
      };

      mk('ax-chart-timeline', {
        type: 'line',
        data: {
          labels: (d.events_timeline || []).map((r) => String(r.day || '').substring(5)),
          datasets: [{
            data: (d.events_timeline || []).map((r) => Number(r.cnt || 0)),
            borderColor: '#38bdf8',
            backgroundColor: 'rgba(56,189,248,0.15)',
            fill: true,
            tension: 0.35,
            pointRadius: 0,
            borderWidth: 2,
          }],
        },
        options: {
          responsive: true, maintainAspectRatio: false,
          plugins: { legend: { display: false } },
          scales: {
            x: { ticks: { color: tick, maxTicksLimit: 10 }, grid: { color: grid } },
            y: { ticks: { color: tick }, grid: { color: grid } },
          },
        },
      });

      mk('ax-chart-partners', {
        type: 'doughnut',
        data: {
          labels: (d.partnership_breakdown || []).map((r) => r.status),
          datasets: [{
            data: (d.partnership_breakdown || []).map((r) => Number(r.cnt || 0)),
            backgroundColor: ['#64748b', '#b8ff3c', '#fbbf24', '#38bdf8', '#fb7185'],
            borderWidth: 0,
          }],
        },
        options: {
          responsive: true, maintainAspectRatio: false,
          plugins: { legend: { position: 'bottom', labels: { color: tick, boxWidth: 10, font: { size: 10 } } } },
        },
      });

      mk('ax-chart-opps', {
        type: 'bar',
        data: {
          labels: (d.top_opportunities || []).slice(0, 8).map((r) => (r.chain || '') + ' ' + (r.city || '')),
          datasets: [{
            data: (d.top_opportunities || []).slice(0, 8).map((r) => Math.round(Number(r.halal_opportunity_score || 0))),
            backgroundColor: 'rgba(251,191,36,0.55)',
            borderColor: '#fbbf24',
            borderWidth: 1,
          }],
        },
        options: {
          indexAxis: 'y', responsive: true, maintainAspectRatio: false,
          plugins: { legend: { display: false } },
          scales: {
            x: { ticks: { color: tick }, grid: { color: grid } },
            y: { ticks: { color: '#cbd5e1', font: { size: 10 } }, grid: { display: false } },
          },
        },
      });

      mk('ax-chart-chains', {
        type: 'bar',
        data: {
          labels: (d.supermarkets_by_chain || []).slice(0, 8).map((r) => r.chain),
          datasets: [{
            data: (d.supermarkets_by_chain || []).slice(0, 8).map((r) => Number(r.cnt || 0)),
            backgroundColor: 'rgba(56,189,248,0.45)',
            borderColor: '#38bdf8',
            borderWidth: 1,
          }],
        },
        options: {
          indexAxis: 'y', responsive: true, maintainAspectRatio: false,
          plugins: { legend: { display: false } },
          scales: {
            x: { ticks: { color: tick }, grid: { color: grid } },
            y: { ticks: { color: '#cbd5e1', font: { size: 10 } }, grid: { display: false } },
          },
        },
      });

      mk('ax-chart-prov', {
        type: 'bar',
        data: {
          labels: (d.supermarkets_by_province || []).slice(0, 8).map((r) => r.province),
          datasets: [{
            data: (d.supermarkets_by_province || []).slice(0, 8).map((r) => Number(r.cnt || 0)),
            backgroundColor: 'rgba(184,255,60,0.4)',
            borderColor: '#b8ff3c',
            borderWidth: 1,
          }],
        },
        options: {
          responsive: true, maintainAspectRatio: false,
          plugins: { legend: { display: false } },
          scales: {
            x: { ticks: { color: tick, maxRotation: 45 }, grid: { display: false } },
            y: { ticks: { color: tick }, grid: { color: grid } },
          },
        },
      });
    },
  };
}