#include "project_internal.h"
#include "xtc/xtc_editing.h"
#include <stdlib.h>
#include <string.h>

static xtc_result selection_valid(const xtc_project *p,const uint64_t *ids,size_t count)
{
    size_t i,j;xtc_clip_info c;
    if(!p || !ids || !count || count>XTC_PROJECT_MAX_CLIPS)return XTC_ERR_INVALID_ARGUMENT;
    for(i=0;i<count;++i) {
        if(xtc_project_find_clip(p,ids[i],&c)!=XTC_OK)return XTC_ERR_NOT_FOUND;
        for(j=0;j<i;++j)if(ids[i]==ids[j])return XTC_ERR_INVALID_ARGUMENT;
    }
    return XTC_OK;
}
static void publish(xtc_project *p,xtc_project *copy)
{
    xtc_graph *old=p->graph;*p=*copy;copy->graph=old;
}
xtc_result xtc_project_transform_clips(xtc_project *p,const uint64_t *ids,size_t count,
                                      xtc_clip_operation operation,int64_t amount,uint64_t *out_ids)
{
    xtc_project *copy=NULL;size_t i;uint64_t output[XTC_PROJECT_MAX_CLIPS];
    xtc_result r=selection_valid(p,ids,count);
    if(r!=XTC_OK)return r;
    if(operation<XTC_CLIPS_MOVE || operation>XTC_CLIPS_DELETE ||
       amount<-(int64_t)XTC_PROJECT_MAX_TICK || amount>(int64_t)XTC_PROJECT_MAX_TICK)return XTC_ERR_INVALID_ARGUMENT;
    r=xtc_project_clone(p,&copy);
    for(i=0;r==XTC_OK && i<count;++i) {
        xtc_clip_info c;int64_t start;
        r=xtc_project_find_clip(copy,ids[i],&c);if(r!=XTC_OK)break;
        start=(int64_t)c.start_tick+amount;output[i]=ids[i];
        if(operation==XTC_CLIPS_DELETE)r=xtc_project_remove_clip(copy,ids[i]);
        else if(start<0 || start>(int64_t)XTC_PROJECT_MAX_TICK)r=XTC_ERR_INVALID_ARGUMENT;
        else if(operation==XTC_CLIPS_DUPLICATE)r=xtc_project_duplicate_clip(copy,ids[i],c.track_id,(uint64_t)start,output+i);
        else r=xtc_project_edit_clip(copy,ids[i],c.track_id,(uint64_t)start,c.length_tick,c.offset_tick);
    }
    if(r==XTC_OK){publish(p,copy);if(out_ids)memcpy(out_ids,output,count*sizeof(*output));}
    xtc_project_destroy(copy);return r;
}