<script lang="ts" setup>
import { onMounted } from 'vue';

import { type Slice } from '@services/DateService';

const props = defineProps<{ slice: Slice }>();
const slice = computed(() => props.slice);

const { safeSnapshotDates } = useSnapshot()

function transformResponse(input: { _id: string, name: string, count: number }[]) {

    const fixed = fixMetrics(
        { data: input, from: input[0]._id, to: safeSnapshotDates.value.to },
        slice.value,
        { advanced: true, advancedGroupKey: 'name' }
    );

    const parsedDatasets: any[] = [];

    const colors = [
        "#5655d0", "#6bbbe3", "#a6d5cb", "#fae0b9", "#f28e8e",
        "#e3a7e4", "#c4a8e1", "#8cc1d8", "#f9c2cd", "#b4e3b2",
        "#ffdfba", "#e9c3b5", "#d5b8d6", "#add7f6", "#ffd1dc",
        "#ffe7a1", "#a8e6cf", "#d4a5a5", "#f3d6e4", "#c3aed6"
    ];

    for (let i = 0; i < fixed.allKeys.length; i++) {
        const line: any = { data: [], color: colors[i] || '#FF0000', label: fixed.allKeys[i] };
        parsedDatasets.push(line)
        fixed.data.forEach((e: { key: string, value: number }[]) => {
            const target = e.find(e => e.key == fixed.allKeys[i]);
            if (!target) return;
            line.data.push(target.value);
        });
    }
    return { datasets: parsedDatasets, labels: fixed.labels }
}

const errorData = ref<{ errored: boolean, text: string }>({
    errored: false,
    text: ''
})


function onResponseError(e: any) {
    console.log('ON RESPONSE ERROR')
    errorData.value = { errored: true, text: e.response._data.message ?? 'Generic error' }
}

function onResponse(e: any) {
    console.log('ON RESPONSE')
    if (e.response.status != 500) errorData.value = { errored: false, text: '' }
}

const eventsStackedData = useFetch(`/api/timeline/events_stacked`, {
    lazy: true, immediate: false,
    transform: transformResponse,
    headers: useComputedHeaders({ slice }),
    onResponseError,
    onResponse
});

onMounted(async () => {
    eventsStackedData.execute();
});

</script>

<template>
    <div class="h-full">
        <div v-if="eventsStackedData.pending.value" class="flex justify-center py-40">
            <i class="fas fa-spinner text-[2rem] text-accent animate-[spin_1s_linear_infinite] duration-500"></i>
        </div>
        <AdvancedStackedBarChart v-if="!eventsStackedData.pending.value && !errorData.errored"
            :datasets="eventsStackedData.data.value?.datasets || []"
            :labels="eventsStackedData.data.value?.labels || []">
        </AdvancedStackedBarChart>
        <div v-if="errorData.errored" class="flex items-center justify-center py-8 h-full">
            {{ errorData.text }}
        </div>

    </div>
</template>