const emptyMapConfirmPayload = () => ({
    zone_name: '',
    coordinates: '',
    gridMultipolygon: '',
    selectedGridIds: [],
});

/** coordinates 可能是 WKT 数组，也可能是 merge 后的单条 MULTIPOLYGON 字符串 */
export function normalizeMapCoordinates(coordinates) {
    if (Array.isArray(coordinates)) {
        return coordinates.filter((item) => item && String(item).trim().length > 10);
    }
    if (typeof coordinates === 'string') {
        const trimmed = coordinates.trim();
        return trimmed.length > 10 ? [trimmed] : [];
    }
    return [];
}

export default {
    namespaced: true,
    state() {
        return {
            mapConfirmPayload: emptyMapConfirmPayload(),
        };
    },
    getters: {
        hasMapConfirmPayload(state) {
            const { zone_name, coordinates } = state.mapConfirmPayload;
            return Boolean(zone_name) || normalizeMapCoordinates(coordinates).length > 0;
        },
        mapConfirmCoordinatesArray(state) {
            return normalizeMapCoordinates(state.mapConfirmPayload.coordinates);
        },
    },
    mutations: {
        SET_MAP_CONFIRM_PAYLOAD(state, payload) {
            state.mapConfirmPayload = {
                zone_name: payload?.zone_name || '',
                coordinates: payload?.coordinates ?? state.mapConfirmPayload.coordinates ?? '',
                gridMultipolygon: payload?.gridMultipolygon ?? state.mapConfirmPayload.gridMultipolygon ?? '',
                selectedGridIds: Array.isArray(payload?.selectedGridIds)
                    ? payload.selectedGridIds
                    : (state.mapConfirmPayload.selectedGridIds || []),
            };
        },
        CLEAR_MAP_CONFIRM_PAYLOAD(state) {
            state.mapConfirmPayload = emptyMapConfirmPayload();
        },
    },
};