// ================================================================
// 04d_execute_culture.js — Execute Αγορά celebration commands
//
// Handles commands of type 'culture' from the poll response.
// Supported celebration_type values:
//   'party'   → Γιορτή πόλης   (costs wood/stone/iron)
//   'triumph' → Παρέλαση θριάμβου (costs battle points)
//
// On success/failure, reports back to /api/commands/<id>/result
// so the culture_log row is updated from 'pending' to 'success'/'failed'.
// ================================================================

async function executeCultureCommand(cmd) {
    if (!cmd || !cmd.id || !cmd.payload) return;

    const { celebration_type, town_id } = cmd.payload;
    if (!celebration_type || !town_id) {
        reportResult(cmd.id, 'failed', 'Invalid culture payload: missing celebration_type or town_id');
        return;
    }

    if (!['party', 'triumph'].includes(celebration_type)) {
        reportResult(cmd.id, 'failed', `Unknown celebration_type: ${celebration_type}`);
        return;
    }

    log(`[αγορά] Εκτέλεση ${celebration_type === 'party' ? 'Γιορτής πόλης' : 'Παρέλασης θριάμβου'} για πόλη ${town_id}`);

    // Validate town still exists in game memory
    const town = uw.ITowns?.towns?.[town_id];
    if (!town) {
        reportResult(cmd.id, 'failed', `Η πόλη ${town_id} δεν βρέθηκε στη μνήμη του παιχνιδιού.`);
        return;
    }

    // Double-check: is there already a celebration of this type running?
    try {
        const celebModels = uw.MM.getModels()?.Celebration;
        if (celebModels) {
            const nowTs = Math.floor(Date.now() / 1000);
            for (const cel of Object.values(celebModels)) {
                const a = cel.attributes;
                if (String(a.town_id) === String(town_id)
                    && a.celebration_type === celebration_type
                    && (a.finished_at ?? 0) > nowTs) {
                    reportResult(cmd.id, 'failed',
                        `${celebration_type === 'party' ? 'Γιορτή' : 'Παρέλαση'} ήδη ενεργή στην πόλη ${town_id}.`);
                    return;
                }
            }
        }
    } catch (e) { /* model not loaded — proceed anyway, server will error if invalid */ }

    // Fire the Grepolis AJAX
    let ajaxSuccess = false;
    let ajaxError   = null;

    await new Promise(resolve => {
        try {
            uw.gpAjax.ajaxPost(
                'building_place',
                'start_celebration',
                {
                    town_id:          parseInt(town_id, 10),
                    celebration_type: celebration_type
                },
                false,  // no cache-busting
                // success callback
                () => {
                    ajaxSuccess = true;
                    resolve();
                },
                // error callback
                (err) => {
                    ajaxError = err ? JSON.stringify(err) : 'Άγνωστο σφάλμα AJAX';
                    resolve();
                }
            );
        } catch (e) {
            ajaxError = String(e);
            resolve();
        }

        // Safety timeout: if neither callback fires within 12 s, treat as failed
        setTimeout(() => {
            if (!ajaxSuccess && !ajaxError) {
                ajaxError = 'Timeout — δεν ελήφθη απάντηση από το παιχνίδι εντός 12δ.';
            }
            resolve();
        }, 12000);
    });

    if (ajaxSuccess) {
        const label = celebration_type === 'party' ? 'Γιορτή πόλης' : 'Παρέλαση θριάμβου';
        log(`[αγορά] ✅ ${label} ξεκίνησε επιτυχώς (πόλη ${town_id})`);
        reportResult(cmd.id, 'done', `${label} ξεκίνησε επιτυχώς.`);
    } else {
        log(`[αγορά] ❌ Αποτυχία: ${ajaxError}`);
        reportResult(cmd.id, 'failed', ajaxError || 'Αποτυχία εκτέλεσης εορτής.');
    }
}