package foundation.state;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import foundation.data.entity.Entity;
import foundation.json.IJSONProvider;
import foundation.json.IJSONWriter;
import foundation.util.MapList;

public class StateMachine implements IJSONProvider, Iterable<StatePoint> {
	
	public static String State_Code_Open = "Open";
	public static String State_Name_Open = "生效";
	public static String State_Code_Close = "Close";
	public static String State_Name_Close = "关闭";
	public static MapList<String, StatePoint> allPoints;
    private String id;
    private String name;
    private boolean active;
    private StateField stateField;
    private States states;
    private List<String> targets;
    private StatePointBucket pointBucket;

    static {
    	allPoints = new MapList<String, StatePoint>();
    }
    
    public StateMachine() {
    	stateField = new StateField();
    	targets = new ArrayList<String>();
    	pointBucket = new StatePointBucket();
    }

    public void load(Entity entity) throws Exception {
        this.id = entity.getString("id");
        this.name = entity.getString("name");
        this.stateField.setCode(entity.getString("field_state_code", "state_code"));
        this.stateField.setName(entity.getString("field_state_name", "state_name"));
        this.stateField.setReasonCode(entity.getString("field_state_reason_code", "state_reason_code"));
        this.active = entity.getBoolean("is_active", true);
    }

    public void loadOnePoint(StatePoint point) {
    	//1. 加载到当前状态机当中
    	State fromState = states.get(point.getFromCode());
    	point.setFromState(fromState);
    	
        State toState = states.get(point.getToCode());
        point.setToState(toState);
        
        State endState = states.get(point.getEndCode());
        point.setEndState(endState);
        
        //2.
        point.setMachine(this);
        this.pointBucket.loadOne(point);
        
        //3. 
        allPoints.add(point.getId(), point);
    }
    
    public void setStates(States states) {
		this.states = states;
	}

    public void loadTarget(String dataName) {
    	targets.add(dataName);
    }

    public String getId() {
        return this.id;
    }

    public String getName() {
        return this.name;
    }

    public State getFirst() {
        return states.getFirst();
    }

	public StateField getStateField() {
        return this.stateField;
    }

    public List<String> getTargets() {
        return targets;
    }

	public States getStates() {
		return states; 
	}

	public State getState(String code) {
		return states.get(code);
	}
	
	public List<StatePoint> getStatePoints() {
		return pointBucket.getList();
	}

	public static StatePoint getGlobalPoint(String pointId) {
		return allPoints.get(pointId);
	}
	
	public StatePoint getPoint(String pointId) {
		return pointBucket.get(pointId);
	}
	
	public StatePoint getPointByToState(String toState) {
		return pointBucket.getPointByToState(toState);
	}
	
	public boolean isActive() {
		return active;
	}
	
	@Override
	public Iterator<StatePoint> iterator() {
		return pointBucket.iterator();
	}

	@Override
	public String toString() {
		return name; 
	}

	@Override
	public void writeJSON(IJSONWriter writer) {
        writer.beginObject();
        
        writer.write("id", id);
        writer.write("name", name);
        
        writer.beginArray("detail");
        for (StatePoint point: pointBucket) {
            point.writeJSON(writer);
        }
        writer.endArray();
        
        writer.endObject();
	}
	
}