<!--
|--------------------------------------------------------------------------
| Agência PSI — Bot de triagem WhatsApp (CRM Grupo 3.7)
|--------------------------------------------------------------------------
| Configura bot que coleta nome, motivo e preferências antes do paciente
| entrar no fluxo humano. Resposta armazenada em conversation_notes pra
| terapeuta ver ao assumir a conversa.
|--------------------------------------------------------------------------
-->
<script setup>
import { ref, computed, onMounted, watch } from 'vue';
import { useToast } from 'primevue/usetoast';
import { useConfirm } from 'primevue/useconfirm';
import { useTenantStore } from '@/stores/tenantStore';
import { supabase } from '@/lib/supabase/client';

const toast = useToast();
const confirm = useConfirm();
const tenantStore = useTenantStore();

const DEFAULT_CONFIG = () => ({
    enabled: false,
    greeting_message: 'Olá! 👋 Sou o assistente virtual. Vou te fazer algumas perguntas rápidas pra a equipe preparar seu atendimento.',
    closing_message: 'Obrigado! Recebemos suas informações e a equipe entrará em contato em breve. 💙',
    steps: [
        { prompt: 'Qual seu nome completo?', variable: 'nome_completo', type: 'text' },
        { prompt: 'O que te levou a buscar atendimento? Pode me contar brevemente.', variable: 'motivo', type: 'text' },
        { prompt: 'Prefere atendimento online ou presencial?', variable: 'modalidade', type: 'text' },
        { prompt: 'Qual o melhor dia e horário pra você? (Ex: terça à tarde)', variable: 'horario_preferido', type: 'text' }
    ],
    trigger_mode: 'new_contact',
    trigger_keywords: [],
    idle_timeout_minutes: 30,
    respect_optout: true
});

const TRIGGER_OPTIONS = [
    { value: 'new_contact', label: 'Primeiro contato (novo número sem paciente cadastrado)' },
    { value: 'all_unassigned', label: 'Toda conversa sem terapeuta atribuído' },
    { value: 'keyword', label: 'Quando paciente digita palavra-chave' }
];

const config = ref(DEFAULT_CONFIG());
const loading = ref(false);
const saving = ref(false);

const sessions = ref([]);
const sessionsLoading = ref(false);

const tenantId = computed(() => tenantStore.activeTenantId);

async function loadConfig() {
    if (!tenantId.value) return;
    loading.value = true;
    try {
        const { data, error } = await supabase
            .from('conversation_bots')
            .select('*')
            .eq('tenant_id', tenantId.value)
            .maybeSingle();
        if (error) throw error;
        if (data) {
            config.value = {
                enabled: !!data.enabled,
                greeting_message: data.greeting_message || '',
                closing_message: data.closing_message || '',
                steps: Array.isArray(data.steps) && data.steps.length
                    ? data.steps.map((s) => ({ prompt: s.prompt || '', variable: s.variable || '', type: s.type || 'text' }))
                    : DEFAULT_CONFIG().steps,
                trigger_mode: data.trigger_mode || 'new_contact',
                trigger_keywords: Array.isArray(data.trigger_keywords) ? [...data.trigger_keywords] : [],
                idle_timeout_minutes: Number(data.idle_timeout_minutes) || 30,
                respect_optout: data.respect_optout !== false
            };
        } else {
            config.value = DEFAULT_CONFIG();
        }
    } catch (e) {
        toast.add({ severity: 'error', summary: 'Erro ao carregar config', detail: e.message, life: 4000 });
    } finally {
        loading.value = false;
    }
}

function addStep() {
    config.value.steps.push({ prompt: '', variable: `pergunta_${config.value.steps.length + 1}`, type: 'text' });
}

function removeStep(idx) {
    if (config.value.steps.length === 1) {
        toast.add({ severity: 'warn', summary: 'Deixe pelo menos 1 pergunta', life: 2500 });
        return;
    }
    config.value.steps.splice(idx, 1);
}

function moveStep(idx, dir) {
    const newIdx = idx + dir;
    if (newIdx < 0 || newIdx >= config.value.steps.length) return;
    const [item] = config.value.steps.splice(idx, 1);
    config.value.steps.splice(newIdx, 0, item);
}

function validate() {
    const c = config.value;
    if (!c.greeting_message?.trim()) {
        toast.add({ severity: 'warn', summary: 'Mensagem de saudação obrigatória', life: 3000 });
        return false;
    }
    if (!c.closing_message?.trim()) {
        toast.add({ severity: 'warn', summary: 'Mensagem de encerramento obrigatória', life: 3000 });
        return false;
    }
    if (!Array.isArray(c.steps) || c.steps.length === 0) {
        toast.add({ severity: 'warn', summary: 'Adicione ao menos 1 pergunta', life: 3000 });
        return false;
    }
    for (let i = 0; i < c.steps.length; i++) {
        const s = c.steps[i];
        if (!s.prompt?.trim()) {
            toast.add({ severity: 'warn', summary: `Pergunta ${i + 1} sem texto`, life: 3000 });
            return false;
        }
        if (!/^[a-z_][a-z0-9_]*$/i.test(String(s.variable || '').trim())) {
            toast.add({ severity: 'warn', summary: `Pergunta ${i + 1}: variável inválida`, detail: 'Use letras, números e _', life: 4000 });
            return false;
        }
    }
    if (c.trigger_mode === 'keyword' && c.trigger_keywords.length === 0) {
        toast.add({ severity: 'warn', summary: 'Adicione ao menos 1 palavra-chave', life: 3000 });
        return false;
    }
    return true;
}

async function saveConfig() {
    if (!tenantId.value) return;
    if (!validate()) return;
    saving.value = true;
    try {
        const payload = {
            tenant_id: tenantId.value,
            enabled: !!config.value.enabled,
            greeting_message: String(config.value.greeting_message || '').trim().slice(0, 1000),
            closing_message: String(config.value.closing_message || '').trim().slice(0, 1000),
            steps: config.value.steps.map((s) => ({
                prompt: String(s.prompt || '').trim().slice(0, 500),
                variable: String(s.variable || '').trim().toLowerCase(),
                type: s.type || 'text'
            })),
            trigger_mode: config.value.trigger_mode,
            trigger_keywords: (config.value.trigger_keywords || [])
                .map((k) => String(k || '').trim().toLowerCase())
                .filter(Boolean),
            idle_timeout_minutes: Math.max(5, Math.min(1440, Number(config.value.idle_timeout_minutes) || 30)),
            respect_optout: !!config.value.respect_optout
        };
        const { error } = await supabase
            .from('conversation_bots')
            .upsert(payload, { onConflict: 'tenant_id' });
        if (error) throw error;
        toast.add({ severity: 'success', summary: 'Configuração salva', life: 2500 });
        loadSessions();
    } catch (e) {
        toast.add({ severity: 'error', summary: 'Erro ao salvar', detail: e.message, life: 4000 });
    } finally {
        saving.value = false;
    }
}

async function loadSessions() {
    if (!tenantId.value) return;
    sessionsLoading.value = true;
    try {
        const sevenDaysAgo = new Date(Date.now() - 7 * 24 * 3600 * 1000).toISOString();
        const { data, error } = await supabase
            .from('conversation_bot_sessions')
            .select('id, thread_key, contact_number, current_step, collected_data, status, started_at, completed_at, abandoned_at')
            .eq('tenant_id', tenantId.value)
            .gte('started_at', sevenDaysAgo)
            .order('started_at', { ascending: false })
            .limit(30);
        if (error) throw error;
        sessions.value = data || [];
    } catch (e) {
        console.warn('[bots] loadSessions:', e?.message);
    } finally {
        sessionsLoading.value = false;
    }
}

function statusTag(s) {
    const map = {
        active: { label: 'Em andamento', severity: 'warn' },
        completed: { label: 'Concluída', severity: 'success' },
        abandoned_idle: { label: 'Abandonada', severity: 'secondary' },
        abandoned_manual: { label: 'Assumida por humano', severity: 'info' },
        opted_out: { label: 'Opt-out', severity: 'danger' }
    };
    return map[s] || { label: s, severity: 'secondary' };
}

function formatDate(iso) {
    if (!iso) return '—';
    return new Date(iso).toLocaleString('pt-BR', { dateStyle: 'short', timeStyle: 'short' });
}

function addKeyword() {
    const input = prompt('Palavra-chave (ex: "agendar", "consulta"):');
    if (!input) return;
    const kw = String(input).trim().toLowerCase();
    if (kw && !config.value.trigger_keywords.includes(kw)) {
        config.value.trigger_keywords.push(kw);
    }
}

function removeKeyword(idx) {
    config.value.trigger_keywords.splice(idx, 1);
}

function resetToDefault() {
    confirm.require({
        message: 'Restaurar perguntas e mensagens pro modelo padrão? Isso não afeta sessões em andamento.',
        header: 'Restaurar padrão',
        icon: 'pi pi-undo',
        accept: () => {
            const d = DEFAULT_CONFIG();
            config.value.greeting_message = d.greeting_message;
            config.value.closing_message = d.closing_message;
            config.value.steps = d.steps;
            toast.add({ severity: 'info', summary: 'Restaurado — lembre de salvar', life: 2500 });
        }
    });
}

onMounted(async () => {
    await loadConfig();
    await loadSessions();
});

watch(() => tenantStore.activeTenantId, async (id) => {
    if (id) {
        await loadConfig();
        await loadSessions();
    }
});
</script>

<template>
    <div class="flex flex-col gap-4">
        <ConfirmDialog />

        <!-- Header -->
        <div class="cfg-subheader">
            <div class="cfg-subheader__icon"><i class="pi pi-android" /></div>
            <div class="min-w-0 flex-1">
                <div class="cfg-subheader__title">Bot de triagem WhatsApp</div>
                <div class="cfg-subheader__sub">Coleta nome, motivo e preferências do paciente antes de entrar no fluxo humano.</div>
            </div>
        </div>

        <div v-if="loading" class="flex justify-center py-10">
            <ProgressSpinner style="width: 40px; height: 40px" />
        </div>

        <template v-else>
            <!-- Card principal -->
            <div class="border border-[var(--surface-border)] rounded-lg bg-[var(--surface-card)] p-4 flex flex-col gap-4">
                <!-- Toggle -->
                <div class="flex items-center justify-between gap-3">
                    <div class="flex items-center gap-3">
                        <ToggleSwitch v-model="config.enabled" inputId="bot-enabled" />
                        <label for="bot-enabled" class="text-sm font-semibold cursor-pointer">Ativar bot</label>
                    </div>
                    <Tag :value="config.enabled ? 'Ativo' : 'Desativado'" :severity="config.enabled ? 'success' : 'secondary'" class="text-[0.7rem]" />
                </div>

                <!-- Trigger -->
                <div class="flex flex-col gap-1 border-t border-[var(--surface-border)] pt-3">
                    <label class="text-xs font-semibold uppercase tracking-wide text-[var(--text-color-secondary)]">Quando acionar o bot</label>
                    <Select v-model="config.trigger_mode" :options="TRIGGER_OPTIONS" optionLabel="label" optionValue="value" class="w-full" />

                    <!-- Keywords quando modo=keyword -->
                    <div v-if="config.trigger_mode === 'keyword'" class="mt-2 flex flex-col gap-1.5">
                        <label class="text-xs text-[var(--text-color-secondary)]">Palavras-chave que ativam o bot</label>
                        <div class="flex flex-wrap gap-1.5">
                            <span v-for="(kw, idx) in config.trigger_keywords" :key="kw + idx"
                                  class="inline-flex items-center gap-1 px-2 py-0.5 rounded-full bg-[var(--surface-ground)] border border-[var(--surface-border)] text-xs">
                                {{ kw }}
                                <button class="text-[var(--text-color-secondary)] hover:text-red-500" @click="removeKeyword(idx)">
                                    <i class="pi pi-times text-[0.6rem]" />
                                </button>
                            </span>
                            <Button icon="pi pi-plus" label="Adicionar" size="small" severity="secondary" outlined @click="addKeyword" />
                        </div>
                    </div>
                </div>

                <!-- Mensagem de saudação -->
                <div class="flex flex-col gap-1 border-t border-[var(--surface-border)] pt-3">
                    <label class="text-xs font-semibold uppercase tracking-wide text-[var(--text-color-secondary)]">Saudação inicial</label>
                    <Textarea v-model="config.greeting_message" rows="2" autoResize maxlength="1000" class="w-full" />
                    <small class="text-[var(--text-color-secondary)]">Enviada uma vez quando o bot inicia uma sessão.</small>
                </div>

                <!-- Perguntas -->
                <div class="flex flex-col gap-2 border-t border-[var(--surface-border)] pt-3">
                    <div class="flex items-center justify-between gap-2">
                        <label class="text-xs font-semibold uppercase tracking-wide text-[var(--text-color-secondary)]">Perguntas (em ordem)</label>
                        <div class="flex gap-1">
                            <Button icon="pi pi-undo" label="Padrão" size="small" severity="secondary" outlined @click="resetToDefault" />
                            <Button icon="pi pi-plus" label="Nova pergunta" size="small" @click="addStep" />
                        </div>
                    </div>

                    <div v-for="(step, idx) in config.steps" :key="idx"
                         class="border border-[var(--surface-border)] rounded-md p-3 flex flex-col gap-2 bg-[var(--surface-ground)]">
                        <div class="flex items-center gap-2">
                            <span class="font-mono text-xs px-2 py-0.5 rounded bg-[var(--surface-card)] border border-[var(--surface-border)]">{{ idx + 1 }}</span>
                            <div class="flex gap-1 ml-auto">
                                <Button icon="pi pi-arrow-up" size="small" text rounded :disabled="idx === 0" @click="moveStep(idx, -1)" />
                                <Button icon="pi pi-arrow-down" size="small" text rounded :disabled="idx === config.steps.length - 1" @click="moveStep(idx, 1)" />
                                <Button icon="pi pi-trash" size="small" text rounded severity="danger" @click="removeStep(idx)" />
                            </div>
                        </div>
                        <div class="flex flex-col gap-1">
                            <label class="text-[0.65rem] uppercase text-[var(--text-color-secondary)]">Pergunta</label>
                            <Textarea v-model="step.prompt" rows="2" autoResize maxlength="500" />
                        </div>
                        <div class="flex flex-col gap-1">
                            <label class="text-[0.65rem] uppercase text-[var(--text-color-secondary)]">Variável (identificador)</label>
                            <InputText v-model="step.variable" class="!text-xs font-mono" maxlength="50" />
                            <small class="text-[var(--text-color-secondary)]">Usada na nota interna e no extrato. Só letras/números/_</small>
                        </div>
                    </div>
                </div>

                <!-- Mensagem de encerramento -->
                <div class="flex flex-col gap-1 border-t border-[var(--surface-border)] pt-3">
                    <label class="text-xs font-semibold uppercase tracking-wide text-[var(--text-color-secondary)]">Encerramento</label>
                    <Textarea v-model="config.closing_message" rows="2" autoResize maxlength="1000" class="w-full" />
                    <small class="text-[var(--text-color-secondary)]">Enviada quando o paciente responde a última pergunta. Depois disso a conversa entra no fluxo humano.</small>
                </div>

                <!-- Opções avançadas -->
                <div class="flex flex-col gap-3 border-t border-[var(--surface-border)] pt-3">
                    <div class="flex items-center gap-2">
                        <label class="text-sm whitespace-nowrap">Abandonar se paciente não responder em</label>
                        <InputNumber v-model="config.idle_timeout_minutes" :min="5" :max="1440" showButtons buttonLayout="horizontal" :inputStyle="{ width: '4rem', textAlign: 'center' }" incrementButtonIcon="pi pi-plus" decrementButtonIcon="pi pi-minus" />
                        <span class="text-sm text-[var(--text-color-secondary)]">min</span>
                    </div>
                    <div class="flex items-start gap-2">
                        <ToggleSwitch v-model="config.respect_optout" inputId="bot-optout" />
                        <label for="bot-optout" class="text-sm cursor-pointer flex-1">
                            <span class="font-semibold">Respeitar opt-out durante o bot</span>
                            <span class="block text-xs text-[var(--text-color-secondary)]">Se o paciente usar palavra de opt-out, bot encerra e respeita a opção.</span>
                        </label>
                    </div>
                </div>

                <!-- Save -->
                <div class="flex justify-end border-t border-[var(--surface-border)] pt-3">
                    <Button label="Salvar configuração" icon="pi pi-save" :loading="saving" class="rounded-full" @click="saveConfig" />
                </div>
            </div>

            <!-- Histórico de sessões -->
            <div class="border border-[var(--surface-border)] rounded-lg bg-[var(--surface-card)] p-4 flex flex-col gap-3">
                <div class="flex items-center justify-between gap-2 flex-wrap">
                    <div class="flex items-center gap-2">
                        <i class="pi pi-history text-[var(--primary-color)]" />
                        <h3 class="text-sm font-bold uppercase tracking-wide m-0">Sessões dos últimos 7 dias</h3>
                        <Tag :value="sessions.length" severity="secondary" class="text-[0.65rem]" />
                    </div>
                    <Button icon="pi pi-refresh" size="small" severity="secondary" outlined :loading="sessionsLoading" @click="loadSessions" />
                </div>

                <div v-if="sessionsLoading" class="text-xs text-[var(--text-color-secondary)] italic py-3 text-center">Carregando…</div>
                <div v-else-if="!sessions.length" class="text-xs text-[var(--text-color-secondary)] italic py-4 text-center">
                    Nenhuma sessão ainda. Ative o bot e espere o próximo paciente novo enviar mensagem.
                </div>
                <div v-else class="flex flex-col gap-1 max-h-[360px] overflow-y-auto text-xs">
                    <div v-for="s in sessions" :key="s.id"
                         class="grid grid-cols-[auto_auto_1fr_auto_auto] items-center gap-3 px-2 py-1.5 rounded hover:bg-[var(--surface-hover)]">
                        <Tag :value="statusTag(s.status).label" :severity="statusTag(s.status).severity" class="text-[0.6rem]" />
                        <span class="font-mono text-[0.65rem] text-[var(--text-color-secondary)]">{{ s.contact_number || s.thread_key }}</span>
                        <span class="text-[var(--text-color-secondary)] truncate">
                            <template v-if="s.collected_data?.nome_completo">{{ s.collected_data.nome_completo }}</template>
                            <template v-else-if="s.collected_data?.motivo">{{ s.collected_data.motivo }}</template>
                            <template v-else>—</template>
                        </span>
                        <span class="text-[var(--text-color-secondary)] whitespace-nowrap">step {{ s.current_step }}/{{ config.steps.length }}</span>
                        <span class="text-[var(--text-color-secondary)] font-mono whitespace-nowrap">{{ formatDate(s.started_at) }}</span>
                    </div>
                </div>
            </div>
        </template>
    </div>
</template>
