/**
 * MYP Platform Chart-Konfigurationen
 * Basierend auf ApexCharts Bibliothek
 * Version: 1.0.0
 */

// Standard Farben für Diagramme
const MYP_CHART_COLORS = {
  primary: '#3b82f6',   // Blau
  secondary: '#8b5cf6', // Lila
  success: '#10b981',   // Grün
  warning: '#f59e0b',   // Orange
  danger: '#ef4444',    // Rot
  info: '#06b6d4',      // Türkis
  gray: '#6b7280',      // Grau
  gradient: {
    blue: ['#3b82f6', '#93c5fd'],
    purple: ['#8b5cf6', '#c4b5fd'],
    green: ['#10b981', '#6ee7b7'],
    red: ['#ef4444', '#fca5a5'],
    orange: ['#f59e0b', '#fcd34d'],
  }
};

// Gemeinsame Grundeinstellungen für alle Diagramme
const getBaseChartOptions = () => {
  return {
    chart: {
      fontFamily: 'Inter, sans-serif',
      toolbar: {
        show: false
      },
      zoom: {
        enabled: false
      },
      animations: {
        enabled: true,
        easing: 'easeinout',
        speed: 800,
        animateGradually: {
          enabled: true,
          delay: 150
        },
        dynamicAnimation: {
          enabled: true,
          speed: 350
        }
      }
    },
    tooltip: {
      enabled: true,
      theme: 'dark',
      style: {
        fontSize: '12px',
        fontFamily: 'Inter, sans-serif'
      }
    },
    grid: {
      show: true,
      borderColor: '#334155',
      strokeDashArray: 4,
      position: 'back',
      xaxis: {
        lines: {
          show: false
        }
      },
      yaxis: {
        lines: {
          show: true
        }
      }
    },
    legend: {
      position: 'bottom',
      horizontalAlign: 'center',
      offsetY: 8,
      fontSize: '14px',
      fontFamily: 'Inter, sans-serif',
      markers: {
        width: 10,
        height: 10,
        strokeWidth: 0,
        radius: 4
      },
      itemMargin: {
        horizontal: 10,
        vertical: 0
      }
    },
    stroke: {
      curve: 'smooth',
      width: 3
    },
    xaxis: {
      labels: {
        style: {
          fontSize: '12px',
          fontFamily: 'Inter, sans-serif',
          colors: '#94a3b8'
        }
      },
      axisBorder: {
        show: false
      },
      axisTicks: {
        show: false
      }
    },
    yaxis: {
      labels: {
        style: {
          fontSize: '12px',
          fontFamily: 'Inter, sans-serif',
          colors: '#94a3b8'
        }
      }
    },
    dataLabels: {
      enabled: false
    },
    responsive: [
      {
        breakpoint: 768,
        options: {
          chart: {
            height: '300px'
          },
          legend: {
            position: 'bottom',
            offsetY: 0
          }
        }
      }
    ]
  };
};

/**
 * Liniendiagramm Konfiguration
 * @param {Array} series - Datenreihen
 * @param {Array} categories - X-Achsen Kategorien
 * @param {Object} customOptions - Benutzerdefinierte Optionen
 * @returns {Object} Konfigurationsobjekt für ApexCharts
 */
function getLineChartConfig(series, categories, customOptions = {}) {
  const baseOptions = getBaseChartOptions();
  
  const defaultOptions = {
    chart: {
      ...baseOptions.chart,
      type: 'line',
      height: 350
    },
    colors: [
      MYP_CHART_COLORS.primary,
      MYP_CHART_COLORS.secondary,
      MYP_CHART_COLORS.success
    ],
    series: series || [],
    xaxis: {
      ...baseOptions.xaxis,
      categories: categories || []
    }
  };
  
  // Optionen zusammenführen
  return mergeDeep(mergeDeep({}, baseOptions), mergeDeep(defaultOptions, customOptions));
}

/**
 * Flächendiagramm Konfiguration
 * @param {Array} series - Datenreihen
 * @param {Array} categories - X-Achsen Kategorien
 * @param {Object} customOptions - Benutzerdefinierte Optionen
 * @returns {Object} Konfigurationsobjekt für ApexCharts
 */
function getAreaChartConfig(series, categories, customOptions = {}) {
  const baseOptions = getBaseChartOptions();
  
  const defaultOptions = {
    chart: {
      ...baseOptions.chart,
      type: 'area',
      height: 350
    },
    colors: [
      MYP_CHART_COLORS.primary,
      MYP_CHART_COLORS.success
    ],
    series: series || [],
    xaxis: {
      ...baseOptions.xaxis,
      categories: categories || []
    },
    fill: {
      type: 'gradient',
      gradient: {
        shadeIntensity: 1,
        opacityFrom: 0.7,
        opacityTo: 0.3,
        stops: [0, 90, 100]
      }
    }
  };
  
  // Optionen zusammenführen
  return mergeDeep(mergeDeep({}, baseOptions), mergeDeep(defaultOptions, customOptions));
}

/**
 * Balkendiagramm Konfiguration
 * @param {Array} series - Datenreihen
 * @param {Array} categories - X-Achsen Kategorien
 * @param {Object} customOptions - Benutzerdefinierte Optionen
 * @returns {Object} Konfigurationsobjekt für ApexCharts
 */
function getBarChartConfig(series, categories, customOptions = {}) {
  const baseOptions = getBaseChartOptions();
  
  const defaultOptions = {
    chart: {
      ...baseOptions.chart,
      type: 'bar',
      height: 350
    },
    colors: [
      MYP_CHART_COLORS.primary,
      MYP_CHART_COLORS.secondary
    ],
    series: series || [],
    xaxis: {
      ...baseOptions.xaxis,
      categories: categories || []
    },
    plotOptions: {
      bar: {
        horizontal: false,
        columnWidth: '70%',
        borderRadius: 6,
        dataLabels: {
          position: 'top'
        }
      }
    }
  };
  
  // Optionen zusammenführen
  return mergeDeep(mergeDeep({}, baseOptions), mergeDeep(defaultOptions, customOptions));
}

/**
 * Kreisdiagramm Konfiguration
 * @param {Array} series - Datenreihen (Werte)
 * @param {Array} labels - Beschriftungen
 * @param {Object} customOptions - Benutzerdefinierte Optionen
 * @returns {Object} Konfigurationsobjekt für ApexCharts
 */
function getPieChartConfig(series, labels, customOptions = {}) {
  const baseOptions = getBaseChartOptions();
  
  const defaultOptions = {
    chart: {
      ...baseOptions.chart,
      type: 'pie',
      height: 350
    },
    colors: [
      MYP_CHART_COLORS.primary,
      MYP_CHART_COLORS.success,
      MYP_CHART_COLORS.warning,
      MYP_CHART_COLORS.danger,
      MYP_CHART_COLORS.info
    ],
    series: series || [],
    labels: labels || [],
    legend: {
      position: 'bottom'
    },
    responsive: [
      {
        breakpoint: 480,
        options: {
          chart: {
            width: 300
          },
          legend: {
            position: 'bottom'
          }
        }
      }
    ]
  };
  
  // Optionen zusammenführen
  return mergeDeep(mergeDeep({}, baseOptions), mergeDeep(defaultOptions, customOptions));
}

/**
 * Donut-Diagramm Konfiguration
 * @param {Array} series - Datenreihen (Werte)
 * @param {Array} labels - Beschriftungen
 * @param {Object} customOptions - Benutzerdefinierte Optionen
 * @returns {Object} Konfigurationsobjekt für ApexCharts
 */
function getDonutChartConfig(series, labels, customOptions = {}) {
  const baseOptions = getBaseChartOptions();
  
  const defaultOptions = {
    chart: {
      ...baseOptions.chart,
      type: 'donut',
      height: 350
    },
    colors: [
      MYP_CHART_COLORS.primary,
      MYP_CHART_COLORS.success,
      MYP_CHART_COLORS.warning,
      MYP_CHART_COLORS.danger,
      MYP_CHART_COLORS.info
    ],
    series: series || [],
    labels: labels || [],
    legend: {
      position: 'bottom'
    },
    plotOptions: {
      pie: {
        donut: {
          size: '70%',
          labels: {
            show: true,
            name: {
              show: true
            },
            value: {
              show: true,
              formatter: function(val) {
                return val;
              }
            },
            total: {
              show: true,
              formatter: function(w) {
                return w.globals.seriesTotals.reduce((a, b) => a + b, 0);
              }
            }
          }
        }
      }
    }
  };
  
  // Optionen zusammenführen
  return mergeDeep(mergeDeep({}, baseOptions), mergeDeep(defaultOptions, customOptions));
}

/**
 * Radial-Diagramm Konfiguration
 * @param {Array} series - Datenreihen (Werte)
 * @param {Array} labels - Beschriftungen
 * @param {Object} customOptions - Benutzerdefinierte Optionen
 * @returns {Object} Konfigurationsobjekt für ApexCharts
 */
function getRadialChartConfig(series, labels, customOptions = {}) {
  const baseOptions = getBaseChartOptions();
  
  const defaultOptions = {
    chart: {
      ...baseOptions.chart,
      type: 'radialBar',
      height: 350
    },
    colors: [
      MYP_CHART_COLORS.primary,
      MYP_CHART_COLORS.success,
      MYP_CHART_COLORS.warning
    ],
    series: series || [],
    labels: labels || [],
    plotOptions: {
      radialBar: {
        dataLabels: {
          name: {
            fontSize: '22px',
          },
          value: {
            fontSize: '16px',
          },
          total: {
            show: true,
            label: 'Gesamt',
            formatter: function(w) {
              return w.globals.seriesTotals.reduce((a, b) => a + b, 0) + '%';
            }
          }
        }
      }
    }
  };
  
  // Optionen zusammenführen
  return mergeDeep(mergeDeep({}, baseOptions), mergeDeep(defaultOptions, customOptions));
}

/**
 * Helper-Funktion zum tiefen Zusammenführen von Objekten
 */
function mergeDeep(target, source) {
  const isObject = obj => obj && typeof obj === 'object';
  
  if (!isObject(target) || !isObject(source)) {
    return source;
  }
  
  const output = { ...target };
  
  Object.keys(source).forEach(key => {
    if (isObject(source[key])) {
      if (!(key in target)) {
        output[key] = source[key];
      } else {
        output[key] = mergeDeep(target[key], source[key]);
      }
    } else {
      output[key] = source[key];
    }
  });
  
  return output;
}