/*
|--------------------------------------------------------------------------
| Agência PSI
|--------------------------------------------------------------------------
| Arquivo: src/composables/useAutoReplySettings.js
| Data: 2026-04-21
|
| Settings de auto-reply fora do horário (CRM Grupo 2.3).
|--------------------------------------------------------------------------
*/

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

const DEFAULT_SETTINGS = {
    enabled: false,
    message: 'Olá! Nosso horário de atendimento acabou. Retornaremos sua mensagem assim que possível. Obrigado!',
    cooldown_minutes: 180,
    schedule_mode: 'agenda',
    business_hours: [],
    custom_window: []
};

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

    const settings = ref({ ...DEFAULT_SETTINGS });
    const loading = ref(false);
    const saving = ref(false);
    const error = ref(null);
    const lastLoadedAt = ref(null);

    async function load() {
        const tenantId = tenantStore.activeTenantId;
        if (!tenantId) return;
        loading.value = true;
        error.value = null;
        try {
            const { data, error: err } = await supabase
                .from('conversation_autoreply_settings')
                .select('enabled, message, cooldown_minutes, schedule_mode, business_hours, custom_window')
                .eq('tenant_id', tenantId)
                .maybeSingle();
            if (err) throw err;
            if (data) {
                settings.value = {
                    enabled: !!data.enabled,
                    message: data.message ?? DEFAULT_SETTINGS.message,
                    cooldown_minutes: Number(data.cooldown_minutes ?? DEFAULT_SETTINGS.cooldown_minutes),
                    schedule_mode: data.schedule_mode ?? 'agenda',
                    business_hours: Array.isArray(data.business_hours) ? data.business_hours : [],
                    custom_window: Array.isArray(data.custom_window) ? data.custom_window : []
                };
            } else {
                settings.value = { ...DEFAULT_SETTINGS, business_hours: [], custom_window: [] };
            }
            lastLoadedAt.value = new Date().toISOString();
        } catch (e) {
            error.value = e?.message || 'Falha ao carregar settings';
        } finally {
            loading.value = false;
        }
    }

    async function save(partial = null) {
        const tenantId = tenantStore.activeTenantId;
        if (!tenantId) return { ok: false, error: 'no_tenant' };
        const payload = partial ? { ...settings.value, ...partial } : { ...settings.value };

        // Sanitização básica
        payload.message = String(payload.message || '').trim().slice(0, 2000);
        if (!payload.message) return { ok: false, error: 'mensagem vazia' };
        payload.cooldown_minutes = Math.max(0, Math.min(43200, Number(payload.cooldown_minutes) || 0));
        if (!['agenda', 'business_hours', 'custom'].includes(payload.schedule_mode)) {
            payload.schedule_mode = 'agenda';
        }
        payload.business_hours = Array.isArray(payload.business_hours) ? payload.business_hours : [];
        payload.custom_window = Array.isArray(payload.custom_window) ? payload.custom_window : [];

        saving.value = true;
        try {
            const { error: err } = await supabase
                .from('conversation_autoreply_settings')
                .upsert({ tenant_id: tenantId, ...payload }, { onConflict: 'tenant_id' });
            if (err) throw err;
            settings.value = payload;
            return { ok: true };
        } catch (e) {
            return { ok: false, error: e?.message || 'Falha ao salvar' };
        } finally {
            saving.value = false;
        }
    }

    // Busca a agenda_regras_semanais do tenant — pra mostrar preview "seguindo agenda"
    async function loadAgendaWindows() {
        const tenantId = tenantStore.activeTenantId;
        if (!tenantId) return [];
        try {
            const { data } = await supabase
                .from('agenda_regras_semanais')
                .select('dia_semana, hora_inicio, hora_fim, ativo')
                .eq('tenant_id', tenantId)
                .eq('ativo', true)
                .order('dia_semana');
            return (data || []).map((r) => ({
                dow: r.dia_semana,
                start: String(r.hora_inicio).slice(0, 5),
                end: String(r.hora_fim).slice(0, 5)
            }));
        } catch {
            return [];
        }
    }

    return {
        settings,
        loading,
        saving,
        error,
        lastLoadedAt,
        load,
        save,
        loadAgendaWindows
    };
}