<template>
    <div class="min-h-screen">
        <div class="flex items-center justify-between">
            <div class="flex items-center gap-10">
                <Icon
                    @click="router.push('/')"
                    name="gg:arrow-left-o"
                    size="44"
                    class="cursor-pointer text-primary-500"
                />
                <h1 class="text-3xl font-bold uppercase text-primary-500">bâtiments</h1>
            </div>
        </div>

        <div class="px-[86px]">
            <div class="border border-slate-200">
                <div
                    v-for="entry in buildingLayouts"
                    :key="entry.building.id"
                    class="border-t border-slate-200"
                >
                    <div class="bg-slate-100 px-4 py-3 font-semibold tracking-wide">
                        {{ entry.building.label || `Bâtiment ${entry.building.id}` }}
                    </div>

                    <div class="px-4 py-4">
                        <div v-if="!entry.layout" class="text-sm text-slate-400">
                            Aucun plan de bâtiment.
                        </div>

                        <div v-else>
                            <div class="overflow-auto">
                                <div class="grid" :style="entry.gridStyle">
                                    <template v-for="cell in entry.cells" :key="cell.key">
                                        <div
                                            v-if="cell.isEmpty"
                                            class="h-[50px] border-x-[2.5px] border-slate-300 [border-left-style:dotted] [border-right-style:dotted]"
                                            :style="cell.spanStyle"
                                        ></div>
                                        <NuxtLink
                                            v-else
                                            class="relative flex items-center justify-center border-2 border-x-white border-y-black h-[50px]"
                                            :class="cell.baseClass + (activeLegendStatutId !== null && cell.caseStatusId !== activeLegendStatutId ? ' opacity-35 hover:opacity-70' : '')"
                                            :style="[cell.spanStyle, cell.caseStyle]"
                                            :to="cell.caseId ? `/infrastructure/case?id=${cell.caseId}` : '/infrastructure/case'"
                                            :title="cell.caseStatusLabel ?? undefined"
                                        >
                                            {{ cell.display }}
                                        </NuxtLink>
                                    </template>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class="mb-16 border border-slate-200">
                <div class="bg-slate-100 px-4 py-3 font-semibold tracking-wide ">
                    Légende
                </div>
                <div class="px-4 py-4">
                    <div class="flex flex-wrap gap-3">
                        <div
                            v-for="statut in statutLegend"
                            :key="statut.id"
                            class="inline-flex cursor-pointer items-center gap-2 rounded border border-slate-200 px-2 py-1"
                            @mouseenter="activeLegendStatutId = statut.id"
                            @mouseleave="activeLegendStatutId = null"
                        >
                            <span
                                class="h-4 w-4 rounded border border-slate-300"
                                :style="statut.couleur ? { backgroundColor: statut.couleur } : {}"
                            ></span>
                            <span class="text-sm uppercase text-slate-700">
                                {{ statut.label}}
                            </span>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script setup lang="ts">
import type { BuildingData } from "~/services/dto/building-data"
import type { BuildingLayoutData, LayoutCell } from "~/services/dto/building-layout-data"
import type { BuildingCasePositionData } from "~/services/dto/building-case-position-data"
import type { BuildingCaseStatusData } from "~/services/dto/building-case-status-data"
import { getBuildingList } from "~/services/building"
import { getStatutList } from "~/services/statut"


definePageMeta({ layout: "default" })

const router = useRouter()
const buildingList = ref<BuildingData[]>([])
const statutLegend = ref<BuildingCaseStatusData[]>([])
const activeLegendStatutId = ref<number | null>(null)
const buildingLayouts = computed(() =>
    buildingList.value.map((building) => {
        const layout = building.layouts?.[0] ?? null
        const view = layout ? buildLayoutView(layout) : null
        return { building, layout, cells: view?.cells ?? [], gridStyle: view?.gridStyle ?? {} }
    })
)

const normalizeCaseStatusColor = (value: string | null | undefined): string | null => {
    const color = (value ?? "").trim()
    return color.length > 0 ? color : null
}
const BASE_GRID_STYLE = { gridAutoRows: "1fr", rowGap: "18px", columnGap: "0px", width: "100%" } as const
const createEmptyCell = (key: string, spanStyle: Record<string, string>): LayoutCell => ({
    key,
    isEmpty: true,
    caseId: null,
    display: "",
    caseStatusId: null,
    caseStatusLabel: null,
    caseStyle: undefined,
    spanStyle,
    baseClass: ""
})
const buildLayoutView = (layout: BuildingLayoutData): { cells: LayoutCell[]; gridStyle: Record<string, string> } | null => {
    const rows = layout.rows ?? 0, cols = layout.columns ?? 0
    if (rows <= 0 || cols <= 0) return null
    const positions = (layout.casePositions ?? []).filter(Boolean) as BuildingCasePositionData[]
    const covered = Array.from({ length: rows }, () => Array.from({ length: cols }, () => false))
    const map = new Map<string, BuildingCasePositionData>()
    const occupied = new Set<number>()
    for (const position of positions) {
        const x = position.x ?? 1, y = position.y ?? 1
        const key = `${x}-${y}`
        if (!map.has(key)) map.set(key, position)
        occupied.add(x)
    }
    const gapColumns = Array.from({ length: cols }, (_, i) => i + 1).filter((x) => !occupied.has(x))
    const gapSet = new Set(gapColumns)
    const cells: LayoutCell[] = []
    for (let y = 1; y <= rows; y++) {
        for (let x = 1; x <= cols; x++) {
            if (covered[y - 1][x - 1]) continue
            const position = map.get(`${x}-${y}`)
            if (!position) continue
            const columnSpan = position.w ?? 1, rowSpan = position.h ?? 1
            for (let row = y - 1; row < y - 1 + rowSpan; row++) {
                for (let col = x - 1; col < x - 1 + columnSpan; col++) {
                    if (row < rows && col < cols) covered[row][col] = true
                }
            }
            const caseId = (position.buildingCase?.id ?? null) as number | null
            const caseNumber = (position.buildingCase?.caseNumber ?? null) as number | null
            const caseStatusId = position.buildingCase?.statut?.id ?? null
            const caseStatusLabel = position.buildingCase?.statut?.label ?? null
            const statusColor = normalizeCaseStatusColor(position.buildingCase?.statut?.couleur)
            const caseStyle = statusColor ? { backgroundColor: statusColor } : undefined
            const baseClass = [
                !caseId ? "border-x-[3px] [border-left-style:dotted] [border-right-style:dotted]" : "",
                caseId ? "hover:opacity-85 focus-visible:outline-none" : "hover:opacity-85",
                gapSet.has(x - 1) ? "border-l-0" : "",
                gapSet.has(x + columnSpan) ? "border-r-0" : "",
                x === 1 ? "[border-left-style:dotted] border-l-[3px]" : "",
                x + columnSpan - 1 === cols ? "[border-right-style:dotted] border-r-[3px]" : ""
            ].filter(Boolean).join(" ")
            cells.push({
                key: `case-${layout.id}-${position.id}`,
                isEmpty: false,
                caseId,
                display: caseNumber !== null ? String(caseNumber) : "Case",
                caseStatusId,
                caseStatusLabel,
                caseStyle,
                spanStyle: { gridColumn: `${x} / span ${columnSpan}`, gridRow: `${y} / span ${rowSpan}` },
                baseClass
            })
        }
        for (const gapX of gapColumns) {
            cells.push(createEmptyCell(`gap-${layout.id}-${y}-${gapX}`, { gridColumn: `${gapX} / span 1`, gridRow: `${y} / span 1` }))
        }
    }
    const columnsTemplate = Array.from({ length: cols }, (_, i) => (gapSet.has(i + 1) ? "24px" : "minmax(0, 1fr)")).join(" ")
    return { cells, gridStyle: { gridTemplateColumns: columnsTemplate, ...BASE_GRID_STYLE } }
}

onMounted(async () => {
    const buildings = await getBuildingList()
    const statuts = await getStatutList()
    buildingList.value = buildings
    statutLegend.value = [...statuts].sort((a, b) =>
        (a.label ?? "").localeCompare(b.label ?? "", "fr", { sensitivity: "base" })
    )
})
</script>
