/*
|--------------------------------------------------------------------------
| Agência PSI
|--------------------------------------------------------------------------
| Arquivo: src/composables/useConversationOptouts.js
| Data: 2026-04-21
|
| Gerencia opt-outs do CRM WhatsApp (LGPD Art. 18 Sec.2).
|--------------------------------------------------------------------------
*/

import { ref, computed } from 'vue';
import { supabase } from '@/lib/supabase/client';
import { tenantDb } from '@/lib/supabase/tenantClient';
import { useTenantStore } from '@/stores/tenantStore';

function normalizePhoneBR(raw) {
    if (!raw) return '';
    const digits = String(raw).replace(/\D/g, '');
    // Sem DDI 55 → agrega
    if (digits.length === 10 || digits.length === 11) return '55' + digits;
    return digits;
}

export function useConversationOptouts() {
    const tenantStore = useTenantStore();

    const optouts = ref([]);
    const keywords = ref([]);
    const loading = ref(false);
    const saving = ref(false);

    const activeOptouts = computed(() => optouts.value.filter((o) => !o.opted_back_in_at));
    const historyOptouts = computed(() => optouts.value.filter((o) => o.opted_back_in_at));

    async function load() {
        const tenantId = tenantStore.activeTenantId;
        if (!tenantId) return;
        loading.value = true;
        try {
            const [optsRes, kwsRes] = await Promise.all([
                tenantDb().from('conversation_optouts')
                    .select('id, phone, patient_id, source, keyword_matched, original_message, notes, opted_out_at, opted_back_in_at, blocked_by')
                    .order('opted_out_at', { ascending: false }),
                tenantDb().from('conversation_optout_keywords')
                    .select('id, keyword, enabled, is_system')
                    .order('is_system', { ascending: false })
                    .order('keyword', { ascending: true })
            ]);
            optouts.value = optsRes.data || [];
            keywords.value = kwsRes.data || [];

            // Enriquece com nome do paciente
            const patIds = [...new Set(optouts.value.map((o) => o.patient_id).filter(Boolean))];
            if (patIds.length) {
                const { data: pats } = await tenantDb().from('patients').select('id, nome_completo').in('id', patIds);
                const patMap = Object.fromEntries((pats || []).map((p) => [p.id, p.nome_completo]));
                optouts.value = optouts.value.map((o) => ({ ...o, _patient_name: patMap[o.patient_id] || null }));
            }
        } catch (e) {
            console.error('[useConversationOptouts] load:', e?.message);
        } finally {
            loading.value = false;
        }
    }

    async function addManual({ phone, patientId = null, notes = null }) {
        const tenantId = tenantStore.activeTenantId;
        const cleanPhone = normalizePhoneBR(phone);
        if (!tenantId || !cleanPhone) return { ok: false, error: 'invalid_params' };
        if (!/^\d{6,15}$/.test(cleanPhone)) return { ok: false, error: 'invalid_phone_format' };

        saving.value = true;
        try {
            const { data: authData } = await supabase.auth.getUser();
            const userId = authData?.user?.id;

            // Verifica se já existe ativo
            const { data: existing } = await tenantDb().from('conversation_optouts')
                .select('id')
                .eq('phone', cleanPhone)
                .is('opted_back_in_at', null)
                .maybeSingle();
            if (existing) return { ok: false, error: 'already_opted_out' };

            const { data, error } = await tenantDb().from('conversation_optouts')
                .insert({
                    phone: cleanPhone,
                    patient_id: patientId,
                    source: 'manual',
                    notes,
                    blocked_by: userId
                })
                .select('id, phone, patient_id, source, notes, opted_out_at, blocked_by')
                .single();
            if (error) throw error;
            optouts.value = [{ ...data, _patient_name: null }, ...optouts.value];
            return { ok: true };
        } catch (e) {
            return { ok: false, error: e?.message || 'add_failed' };
        } finally {
            saving.value = false;
        }
    }

    async function restore(id) {
        if (!id) return { ok: false, error: 'invalid_id' };
        saving.value = true;
        try {
            const now = new Date().toISOString();
            const { error } = await tenantDb().from('conversation_optouts')
                .update({ opted_back_in_at: now })
                .eq('id', id);
            if (error) throw error;
            const item = optouts.value.find((o) => o.id === id);
            if (item) item.opted_back_in_at = now;
            return { ok: true };
        } catch (e) {
            return { ok: false, error: e?.message || 'restore_failed' };
        } finally {
            saving.value = false;
        }
    }

    async function addKeyword(keyword) {
        const tenantId = tenantStore.activeTenantId;
        const clean = String(keyword || '').trim().slice(0, 100);
        if (!tenantId || !clean) return { ok: false, error: 'invalid_params' };
        saving.value = true;
        try {
            const { data, error } = await tenantDb().from('conversation_optout_keywords')
                .insert({ keyword: clean, is_system: false, enabled: true })
                .select('id, keyword, enabled, is_system')
                .single();
            if (error) throw error;
            keywords.value = [...keywords.value, data];
            return { ok: true };
        } catch (e) {
            return { ok: false, error: e?.message || 'add_keyword_failed' };
        } finally {
            saving.value = false;
        }
    }

    async function toggleKeyword(id, enabled) {
        saving.value = true;
        try {
            const { error } = await tenantDb().from('conversation_optout_keywords')
                .update({ enabled })
                .eq('id', id);
            if (error) throw error;
            const item = keywords.value.find((k) => k.id === id);
            if (item) item.enabled = enabled;
            return { ok: true };
        } catch (e) {
            return { ok: false, error: e?.message || 'toggle_failed' };
        } finally {
            saving.value = false;
        }
    }

    async function deleteKeyword(id) {
        saving.value = true;
        try {
            const { error } = await tenantDb().from('conversation_optout_keywords')
                .delete()
                .eq('id', id);
            if (error) throw error;
            keywords.value = keywords.value.filter((k) => k.id !== id);
            return { ok: true };
        } catch (e) {
            return { ok: false, error: e?.message || 'delete_failed' };
        } finally {
            saving.value = false;
        }
    }

    return {
        optouts,
        keywords,
        activeOptouts,
        historyOptouts,
        loading,
        saving,
        load,
        addManual,
        restore,
        addKeyword,
        toggleKeyword,
        deleteKeyword
    };
}