/*
|--------------------------------------------------------------------------
| Agência PSI
|--------------------------------------------------------------------------
| Arquivo: src/composables/useConversationNotes.js
| Data: 2026-04-21
|
| Notas internas por thread de conversa. Carregadas sob demanda quando o
| drawer da conversa abre.
|--------------------------------------------------------------------------
*/

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

function sanitizeBody(raw) {
    if (typeof raw !== 'string') return '';
    return raw.trim().slice(0, 4000);
}

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

    const notes = ref([]);
    const loading = ref(false);
    const saving = ref(false);
    const error = ref(null);

    const count = computed(() => notes.value.length);

    async function load(threadKey) {
        if (!threadKey) {
            notes.value = [];
            return;
        }
        const tenantId = tenantStore.activeTenantId;
        if (!tenantId) {
            notes.value = [];
            return;
        }
        loading.value = true;
        error.value = null;
        try {
            const { data, error: err } = await supabase
                .from('conversation_notes')
                .select('id, thread_key, patient_id, contact_number, body, created_by, created_at, updated_at')
                .eq('tenant_id', tenantId)
                .eq('thread_key', threadKey)
                .is('deleted_at', null)
                .order('created_at', { ascending: false });
            if (err) throw err;

            // Busca nomes dos criadores (1 query só)
            const rows = data || [];
            const userIds = [...new Set(rows.map((r) => r.created_by).filter(Boolean))];
            let nameMap = {};
            if (userIds.length) {
                const { data: users } = await supabase
                    .from('profiles')
                    .select('id, full_name')
                    .in('id', userIds);
                nameMap = Object.fromEntries((users || []).map((u) => [u.id, u.full_name || '']));
            }
            notes.value = rows.map((r) => ({ ...r, _author_name: nameMap[r.created_by] || null }));
        } catch (e) {
            error.value = e?.message || 'Falha ao carregar notas';
            notes.value = [];
        } finally {
            loading.value = false;
        }
    }

    async function create({ threadKey, patientId = null, contactNumber = null, body }) {
        const tenantId = tenantStore.activeTenantId;
        const clean = sanitizeBody(body);
        if (!tenantId || !threadKey || !clean) return { ok: false, error: 'invalid_params' };

        saving.value = true;
        try {
            const { data: authData } = await supabase.auth.getUser();
            const userId = authData?.user?.id;
            if (!userId) return { ok: false, error: 'not_authenticated' };

            const { data, error: err } = await supabase
                .from('conversation_notes')
                .insert({
                    tenant_id: tenantId,
                    thread_key: threadKey,
                    patient_id: patientId,
                    contact_number: contactNumber,
                    body: clean,
                    created_by: userId
                })
                .select('id, thread_key, patient_id, contact_number, body, created_by, created_at, updated_at')
                .single();

            if (err) throw err;

            // Prepend (mais recente primeiro)
            notes.value = [{ ...data, _author_name: null }, ...notes.value];
            // Recarrega o display_name do autor novo
            const { data: u } = await supabase
                .from('profiles')
                .select('full_name')
                .eq('id', data.created_by)
                .maybeSingle();
            if (u?.full_name) {
                const item = notes.value.find((n) => n.id === data.id);
                if (item) item._author_name = u.full_name;
            }
            return { ok: true, note: data };
        } catch (e) {
            return { ok: false, error: e?.message || 'insert_failed' };
        } finally {
            saving.value = false;
        }
    }

    async function update(id, body) {
        const clean = sanitizeBody(body);
        if (!id || !clean) return { ok: false, error: 'invalid_params' };
        saving.value = true;
        try {
            const { error: err } = await supabase
                .from('conversation_notes')
                .update({ body: clean })
                .eq('id', id);
            if (err) throw err;
            const item = notes.value.find((n) => n.id === id);
            if (item) {
                item.body = clean;
                item.updated_at = new Date().toISOString();
            }
            return { ok: true };
        } catch (e) {
            return { ok: false, error: e?.message || 'update_failed' };
        } finally {
            saving.value = false;
        }
    }

    async function remove(id) {
        if (!id) return { ok: false, error: 'invalid_id' };
        saving.value = true;
        try {
            const { error: err } = await supabase
                .from('conversation_notes')
                .update({ deleted_at: new Date().toISOString() })
                .eq('id', id);
            if (err) throw err;
            notes.value = notes.value.filter((n) => n.id !== id);
            return { ok: true };
        } catch (e) {
            return { ok: false, error: e?.message || 'delete_failed' };
        } finally {
            saving.value = false;
        }
    }

    function clear() {
        notes.value = [];
        error.value = null;
    }

    return {
        notes,
        count,
        loading,
        saving,
        error,
        load,
        create,
        update,
        remove,
        clear
    };
}