// Raies gamma principales pour les isotopes les plus courants
// Format : { isotope, energy_keV, intensity } (intensity = % de désintégration)
const ISOTOPE_LINES = [
    // Chaîne Uranium-238 (présent naturellement)
    { isotope: "Bi-214", energy_keV: 609.3, intensity: 45.5 },
    { isotope: "Bi-214", energy_keV: 1120.3, intensity: 15.0 },
    { isotope: "Bi-214", energy_keV: 1764.5, intensity: 15.4 },
    { isotope: "Pb-214", energy_keV: 295.2, intensity: 19.2 },
    { isotope: "Pb-214", energy_keV: 351.9, intensity: 37.6 },
    { isotope: "Ra-226", energy_keV: 186.2, intensity: 3.6 },

    // Chaîne Thorium-232 (présent naturellement)
    { isotope: "Ac-228", energy_keV: 911.2, intensity: 27.7 },
    { isotope: "Ac-228", energy_keV: 338.3, intensity: 11.3 },
    { isotope: "Tl-208", energy_keV: 583.2, intensity: 84.5 },
    { isotope: "Tl-208", energy_keV: 2614.5, intensity: 99.0 },
    { isotope: "Pb-212", energy_keV: 238.6, intensity: 43.6 },

    // Potassium-40 (naturel, ubiquitaire)
    { isotope: "K-40", energy_keV: 1460.8, intensity: 10.7 },

    // Isotopes artificiels courants
    { isotope: "Cs-137", energy_keV: 661.7, intensity: 85.1 },
    { isotope: "Cs-134", energy_keV: 604.7, intensity: 97.6 },
    { isotope: "Cs-134", energy_keV: 795.8, intensity: 85.5 },
    { isotope: "Co-60", energy_keV: 1173.2, intensity: 99.9 },
    { isotope: "Co-60", energy_keV: 1332.5, intensity: 100.0 },
    { isotope: "Co-58", energy_keV: 810.8, intensity: 99.4 },
    { isotope: "I-131", energy_keV: 364.5, intensity: 81.7 },
    { isotope: "I-131", energy_keV: 637.0, intensity: 7.3 },
    { isotope: "I-131", energy_keV: 284.3, intensity: 6.1 },
    { isotope: "Ba-133", energy_keV: 356.0, intensity: 62.0 },
    { isotope: "Ir-192", energy_keV: 316.5, intensity: 82.8 },
    { isotope: "Ir-192", energy_keV: 468.1, intensity: 47.8 },
    { isotope: "Ir-192", energy_keV: 604.4, intensity: 8.2 },
    { isotope: "Am-241", energy_keV: 59.5, intensity: 35.9 },

    // Autres courants
    { isotope: "Na-22", energy_keV: 511.0, intensity: 90.0 },
    { isotope: "Na-22", energy_keV: 1274.5, intensity: 99.9 },
    { isotope: "Eu-152", energy_keV: 121.8, intensity: 28.6 },
    { isotope: "Eu-152", energy_keV: 344.3, intensity: 26.6 },
    { isotope: "Eu-152", energy_keV: 1408.0, intensity: 20.9 },
    { isotope: "Mn-54", energy_keV: 834.8, intensity: 99.9 },
    { isotope: "Zn-65", energy_keV: 1115.5, intensity: 50.0 },
    { isotope: "Zr-95/Nb-95", energy_keV: 765.8, intensity: 99.8 },
    { isotope: "Ru-106/Rh-106", energy_keV: 512.0, intensity: 20.5 },
];

// Filtrer les lignes dans la plage visible du détecteur (30-3050 keV pour Radiacode 103)
const VISIBLE_LINES = ISOTOPE_LINES.filter(l => l.energy_keV >= 30 && l.energy_keV <= 3050);

// Global crosshair plugin — vertical dashed line on hover for all charts
const CrosshairPlugin = {
    id: 'crosshair',
    afterDraw(chart) {
        const tooltip = chart.tooltip;
        if (!tooltip || !tooltip._active || tooltip._active.length === 0) return;
        const x = tooltip._active[0].element.x;
        const { top, bottom } = chart.chartArea;
        const ctx = chart.ctx;
        ctx.save();
        ctx.beginPath();
        ctx.moveTo(x, top);
        ctx.lineTo(x, bottom);
        ctx.lineWidth = 1;
        ctx.strokeStyle = 'rgba(255,255,255,0.25)';
        ctx.setLineDash([4, 3]);
        ctx.stroke();
        ctx.restore();
    },
};
Chart.register(CrosshairPlugin);

// Couleurs par catégorie d'isotope
function isotopeLineColor(isotope) {
    if (["K-40", "Bi-214", "Pb-214", "Ra-226"].includes(isotope)) return "rgba(255,152,0,0.5)";    // Uranium chain - orange
    if (["Ac-228", "Tl-208", "Pb-212"].includes(isotope)) return "rgba(156,39,176,0.5)";           // Thorium chain - purple
    if (isotope === "K-40") return "rgba(255,193,7,0.5)";                                            // K-40 - yellow
    if (isotope.startsWith("Cs") || isotope.startsWith("I-131")) return "rgba(244,67,54,0.5)";      // Fission products - red
    if (isotope.startsWith("Co")) return "rgba(76,175,80,0.5)";                                      // Activation - green
    return "rgba(100,181,246,0.35)";                                                                  // Others - light blue
}

function isotopeLabelColor(isotope) {
    if (["K-40", "Bi-214", "Pb-214", "Ra-226"].includes(isotope)) return "#ff9800";
    if (["Ac-228", "Tl-208", "Pb-212"].includes(isotope)) return "#9c27b0";
    if (isotope === "K-40") return "#ffc107";
    if (isotope.startsWith("Cs") || isotope.startsWith("I-131")) return "#f44336";
    if (isotope.startsWith("Co")) return "#4caf50";
    return "#64b5f6";
}

// Créer les annotations Chart.js pour les raies isotopiques
function buildIsotopeAnnotations(showDetectedOnly, detectedIsotopes) {
    const annotations = {};
    const detected = new Set(detectedIsotopes || []);

    VISIBLE_LINES.forEach((line, i) => {
        if (showDetectedOnly && !detected.has(line.isotope)) return;
        // Regrouper les labels pour éviter les chevauchements
        annotations[`line_${i}`] = {
            type: 'line',
            xMin: line.energy_keV,
            xMax: line.energy_keV,
            borderColor: isotopeLineColor(line.isotope),
            borderWidth: 1,
            label: {
                display: true,
                content: `${line.isotope} ${line.energy_keV}`,
                position: 'start',
                backgroundColor: 'rgba(26,26,46,0.85)',
                color: isotopeLabelColor(line.isotope),
                font: { size: 9 },
                padding: 2,
                rotation: -90,
            }
        };
    });

    return annotations;
}