<template>
    <MalioDrawer v-model="isOpen">
        <template #header>
            <h2 class="text-xl font-bold">{{ isEditing ? $t('workflows.editWorkflow') : $t('workflows.addWorkflow') }}</h2>
        </template>
        <form class="flex flex-col gap-4" @submit.prevent="handleSubmit">
            <MalioInputText
                v-model="form.name"
                :label="$t('workflows.name')"
                input-class="w-full"
                :error="touched.name && !form.name.trim() ? $t('workflows.name') + ' requis' : ''"
                @blur="touched.name = true"
            />

            <div class="flex items-center gap-2">
                <input
                    id="isDefault"
                    v-model="form.isDefault"
                    type="checkbox"
                    class="h-4 w-4 rounded border-neutral-300 text-primary-500 focus:ring-primary-500"
                />
                <label for="isDefault" class="text-sm font-medium text-neutral-700">
                    {{ $t('workflows.isDefault') }}
                </label>
            </div>

            <div class="mt-2">
                <div class="flex items-center justify-between">
                    <h3 class="text-sm font-bold text-neutral-900">{{ $t('workflows.statuses') }}</h3>
                    <MalioButton
                        type="button"
                        icon-name="mdi:plus"
                        icon-position="left"
                        button-class="w-auto px-3 py-1 text-xs"
                        :label="$t('workflows.addStatus')"
                        @click="addStatus"
                    />
                </div>

                <div class="mt-3 flex flex-col gap-3">
                    <div
                        v-for="(s, idx) in form.statuses"
                        :key="idx"
                        class="rounded border border-neutral-200 p-3"
                    >
                        <div class="flex items-end gap-2">
                            <MalioInputText
                                v-model="s.label"
                                label="Libellé"
                                input-class="w-full"
                            />
                            <MalioSelect
                                v-model="s.category"
                                :options="categoryOptions"
                                label="Catégorie"
                                group-class="w-48 shrink-0"
                            />
                            <button
                                type="button"
                                class="h-10 px-2 text-red-600 hover:text-red-800"
                                aria-label="Supprimer"
                                @click="removeStatus(idx)"
                            >
                                <Icon name="mdi:delete" size="20" />
                            </button>
                        </div>
                        <div class="mt-2 flex items-center gap-3">
                            <ColorPicker v-model="s.color" />
                            <label class="ml-auto flex items-center gap-1 text-xs text-neutral-700">
                                <input v-model="s.isFinal" type="checkbox" class="h-3 w-3" />
                                {{ $t('archive.statusFinal') }}
                            </label>
                            <label class="flex flex-col text-xs text-neutral-700">
                                Position
                                <input
                                    v-model.number="s.position"
                                    type="number"
                                    class="mt-1 h-9 w-16 rounded border border-neutral-300 px-2 text-sm"
                                />
                            </label>
                        </div>
                    </div>
                </div>
            </div>

            <div class="mt-4 flex justify-end">
                <MalioButton
                    label="Enregistrer"
                    button-class="w-auto px-6"
                    :disabled="isSubmitting"
                    @click="handleSubmit"
                />
            </div>
        </form>
    </MalioDrawer>
</template>

<script setup lang="ts">
import type { Workflow, StatusCategory } from '~/modules/project-management/services/dto/workflow'
import { STATUS_CATEGORY_COLOR } from '~/modules/project-management/services/dto/workflow'
import type { TaskStatusWrite } from '~/modules/project-management/services/dto/task-status'
import { useWorkflowService } from '~/modules/project-management/services/workflows'
import { useTaskStatusService } from '~/modules/project-management/services/task-statuses'

const { t } = useI18n()

const props = defineProps<{
    modelValue: boolean
    item: Workflow | null
}>()

const emit = defineEmits<{
    (e: 'update:modelValue', value: boolean): void
    (e: 'saved'): void
}>()

const isOpen = computed({
    get: () => props.modelValue,
    set: v => emit('update:modelValue', v),
})

const isEditing = computed(() => !!props.item)
const isSubmitting = ref(false)

type StatusForm = {
    id?: number
    label: string
    color: string
    position: number
    isFinal: boolean
    category: StatusCategory
}

const form = reactive<{
    name: string
    isDefault: boolean
    statuses: StatusForm[]
}>({
    name: '',
    isDefault: false,
    statuses: [],
})

const touched = reactive({ name: false })

const categoryOptions: { value: StatusCategory, label: string }[] = [
    { value: 'todo',        label: t('workflows.categories.todo') },
    { value: 'in_progress', label: t('workflows.categories.in_progress') },
    { value: 'blocked',     label: t('workflows.categories.blocked') },
    { value: 'review',      label: t('workflows.categories.review') },
    { value: 'done',        label: t('workflows.categories.done') },
]

watch(() => props.modelValue, (open) => {
    if (!open) return
    if (props.item) {
        form.name = props.item.name
        form.isDefault = props.item.isDefault
        form.statuses = props.item.statuses.map(s => ({
            id: s.id,
            label: s.label,
            color: s.color,
            position: s.position,
            isFinal: s.isFinal,
            category: s.category,
        }))
    } else {
        form.name = ''
        form.isDefault = false
        form.statuses = []
    }
    touched.name = false
})

watch(() => form.statuses.map(s => s.category), (cats, prev) => {
    if (!prev) return
    cats.forEach((cat, i) => {
        const s = form.statuses[i]
        if (s && cat !== prev[i] && s.color === STATUS_CATEGORY_COLOR[prev[i] as StatusCategory]) {
            s.color = STATUS_CATEGORY_COLOR[cat as StatusCategory]
        }
    })
})

function addStatus() {
    form.statuses.push({
        label: '',
        color: STATUS_CATEGORY_COLOR.todo,
        position: form.statuses.length,
        isFinal: false,
        category: 'todo',
    })
}

function removeStatus(idx: number) {
    form.statuses.splice(idx, 1)
}

const workflowService = useWorkflowService()
const statusService = useTaskStatusService()

async function handleSubmit() {
    touched.name = true
    if (!form.name.trim()) return

    isSubmitting.value = true
    try {
        if (isEditing.value && props.item) {
            await workflowService.update(props.item.id, {
                name: form.name.trim(),
                isDefault: form.isDefault,
                position: props.item.position,
            })
            await syncStatuses(props.item)
        } else {
            const created = await workflowService.create({
                name: form.name.trim(),
                isDefault: form.isDefault,
                position: 0,
            })
            for (const s of form.statuses) {
                const payload: TaskStatusWrite = {
                    label: s.label,
                    color: s.color,
                    position: s.position,
                    isFinal: s.isFinal,
                    category: s.category,
                    workflow: `/api/workflows/${created.id}`,
                }
                await statusService.create(payload)
            }
        }
        emit('saved')
        isOpen.value = false
    } finally {
        isSubmitting.value = false
    }
}

async function syncStatuses(workflow: Workflow) {
    const existingIds = new Set(workflow.statuses.map(s => s.id))
    const keptIds = new Set<number>()

    for (const s of form.statuses) {
        if (s.id) {
            keptIds.add(s.id)
            await statusService.update(s.id, {
                label: s.label,
                color: s.color,
                position: s.position,
                isFinal: s.isFinal,
                category: s.category,
            })
        } else {
            await statusService.create({
                label: s.label,
                color: s.color,
                position: s.position,
                isFinal: s.isFinal,
                category: s.category,
                workflow: `/api/workflows/${workflow.id}`,
            })
        }
    }

    for (const id of existingIds) {
        if (id && !keptIds.has(id)) {
            await statusService.remove(id)
        }
    }
}
</script>
