package lockstep

import (
	"ripple/types"
	"ripple/state"
)

func (l *Lockstep) previewWithState(stateCopy *state.State, id types.UserIdentifier) {
	queue := l.mustGetAccount(id)
	for i := 0; i < len(queue); {
		instr := queue[i]
		testState := stateCopy.Clone()
		if _, err := l.dispatch(&testState, id, instr); err != nil {
			queue = append(queue[:i], queue[i+1:]...)
		} else {
			*stateCopy = testState
			i++
		}
	}
	l.queues[id] = queue
}

func (l *Lockstep) PreviewAccount(id types.UserIdentifier) *state.State {
	stateCopy := l.st.Clone()
    l.previewWithState(&stateCopy, id)
	return &stateCopy
}

func (l *Lockstep) PreviewAccounts(ids []types.UserIdentifier) *state.State {
    stateCopy := l.st.Clone()
    for _, id := range ids {
        l.previewWithState(&stateCopy, id)
    }
    return &stateCopy
}