<template>
    <DocSectionText v-bind="$attrs">
        <p>
            A chart is configured with 3 properties; <i>type</i>, <i>data</i> and <i>options</i>. Chart type is defined using the <i>type</i> property that accepts <i>pie</i>, <i>doughtnut</i>, <i>line</i>, <i>bar</i>, <i>radar</i> and
            <i>polarArea</i> as a value. The <i>data</i> defines datasets represented with the chart and the <i>options</i> provide numerous customization options to customize the presentation.
        </p>
    </DocSectionText>
    <div class="card">
        <Chart type="bar" :data="chartData" :options="chartOptions" />
    </div>
    <DocSectionCode :code="code" :dependencies="{ 'chart.js': '3.3.2' }" component="Chart" />
</template>

<script>
import EventBus from '@/layouts/AppEventBus';

export default {
    themeChangeListener: null,
    data() {
        return {
            chartData: null,
            chartOptions: null,
            code: {
                basic: `
<Chart type="bar" :data="chartData" :options="chartOptions" />
`,
                options: `
<template>
    <div class="card">
        <Chart type="bar" :data="chartData" :options="chartOptions" />
    </div>
</template>

<script>
export default {
    data() {
        return {
            chartData: null,
            chartOptions: null
        };
    },
    mounted() {
        this.chartData = this.setChartData();
        this.chartOptions = this.setChartOptions();
    },
    methods: {
        setChartData() {
            return {
                labels: ['Q1', 'Q2', 'Q3', 'Q4'],
                datasets: [
                    {
                        label: 'Sales',
                        data: [540, 325, 702, 620],
                        backgroundColor: ['rgba(255, 159, 64, 0.2)', 'rgba(75, 192, 192, 0.2)', 'rgba(54, 162, 235, 0.2)', 'rgba(153, 102, 255, 0.2)'],
                        borderColor: ['rgb(255, 159, 64)', 'rgb(75, 192, 192)', 'rgb(54, 162, 235)', 'rgb(153, 102, 255)'],
                        borderWidth: 1
                    }
                ]
            };
        },
        setChartOptions() {
            const documentStyle = getComputedStyle(document.documentElement);
            const textColor = documentStyle.getPropertyValue('--text-color');
            const textColorSecondary = documentStyle.getPropertyValue('--text-color-secondary');
            const surfaceBorder = documentStyle.getPropertyValue('--surface-border');

            return {
                plugins: {
                    legend: {
                        labels: {
                            color: textColor
                        }
                    }
                },
                scales: {
                    x: {
                        ticks: {
                            color: textColorSecondary
                        },
                        grid: {
                            color: surfaceBorder
                        }
                    },
                    y: {
                        beginAtZero: true,
                        ticks: {
                            color: textColorSecondary
                        },
                        grid: {
                            color: surfaceBorder
                        }
                    }
                }
            };
        }
    }
};
<\/script>
`,
                composition: `
<template>
    <div class="card">
        <Chart type="bar" :data="chartData" :options="chartOptions" />
    </div>
</template>

<script setup>
import { ref, onMounted } from "vue";

onMounted(() => {
    chartData.value = setChartData();
    chartOptions.value = setChartOptions();
});

const chartData = ref();
const chartOptions = ref();

const setChartData = () => {
    return {
        labels: ['Q1', 'Q2', 'Q3', 'Q4'],
        datasets: [
            {
                label: 'Sales',
                data: [540, 325, 702, 620],
                backgroundColor: ['rgba(255, 159, 64, 0.2)', 'rgba(75, 192, 192, 0.2)', 'rgba(54, 162, 235, 0.2)', 'rgba(153, 102, 255, 0.2)'],
                borderColor: ['rgb(255, 159, 64)', 'rgb(75, 192, 192)', 'rgb(54, 162, 235)', 'rgb(153, 102, 255)'],
                borderWidth: 1
            }
        ]
    };
};
const setChartOptions = () => {
    const documentStyle = getComputedStyle(document.documentElement);
    const textColor = documentStyle.getPropertyValue('--text-color');
    const textColorSecondary = documentStyle.getPropertyValue('--text-color-secondary');
    const surfaceBorder = documentStyle.getPropertyValue('--surface-border');

    return {
        plugins: {
            legend: {
                labels: {
                    color: textColor
                }
            }
        },
        scales: {
            x: {
                ticks: {
                    color: textColorSecondary
                },
                grid: {
                    color: surfaceBorder
                }
            },
            y: {
                beginAtZero: true,
                ticks: {
                    color: textColorSecondary
                },
                grid: {
                    color: surfaceBorder
                }
            }
        }
    };
}
<\/script>
`
            }
        };
    },
    beforeUnmount() {
        EventBus.off('theme-change-complete', this.themeChangeListener);
    },
    mounted() {
        this.chartData = this.setChartData();
        this.chartOptions = this.setChartOptions();

        this.themeChangeListener = () => {
            this.chartOptions = this.setChartOptions();
        };

        EventBus.on('theme-change-complete', this.themeChangeListener);
    },
    methods: {
        setChartData() {
            return {
                labels: ['Q1', 'Q2', 'Q3', 'Q4'],
                datasets: [
                    {
                        label: 'Sales',
                        data: [540, 325, 702, 620],
                        backgroundColor: ['rgba(255, 159, 64, 0.2)', 'rgba(75, 192, 192, 0.2)', 'rgba(54, 162, 235, 0.2)', 'rgba(153, 102, 255, 0.2)'],
                        borderColor: ['rgb(255, 159, 64)', 'rgb(75, 192, 192)', 'rgb(54, 162, 235)', 'rgb(153, 102, 255)'],
                        borderWidth: 1
                    }
                ]
            };
        },
        setChartOptions() {
            const documentStyle = getComputedStyle(document.documentElement);
            const textColor = documentStyle.getPropertyValue('--text-color');
            const textColorSecondary = documentStyle.getPropertyValue('--text-color-secondary');
            const surfaceBorder = documentStyle.getPropertyValue('--surface-border');

            return {
                plugins: {
                    legend: {
                        labels: {
                            color: textColor
                        }
                    }
                },
                scales: {
                    x: {
                        ticks: {
                            color: textColorSecondary
                        },
                        grid: {
                            color: surfaceBorder
                        }
                    },
                    y: {
                        beginAtZero: true,
                        ticks: {
                            color: textColorSecondary
                        },
                        grid: {
                            color: surfaceBorder
                        }
                    }
                }
            };
        }
    }
};
</script>
