package main

import (
	"log"
	"math/rand"
)

func BigBang(config YTConfig) ([]YTSector, error) {
	var result []YTSector = make([]YTSector, config.Sectors)[0:0]
	log.Printf("Config.Sector: %d, Result: len=%d cap=%d", config.Sectors, len(result), cap(result))
	var err error
	_ = err
	// Fill the universe
	for sec_num := range make([]byte, config.Sectors) {
		result = append(result, YTSector{
			Sector: YTSectorType(sec_num + 1),
		})
	}
	// Warps
	var num_sectors int        // Number of sectors/warps from this sector
	var sectors []YTSectorType // Collection of sectors (to be added to the current sector)
	var sec YTSectorType       // Current sector being added
	var already bool           // is the sector already there
	var added bool             // have we added a sector?
	for sec_num, _ := range result {
		sectors = []YTSectorType{}
		num_sectors = rand.Intn(5) + 1
		for _ = range make([]byte, num_sectors) {
			added = false
			for !added {
				sec = YTSectorType(rand.Intn(config.Sectors-1) + 1)
				already = false
				for _, s := range sectors {
					if s == sec {
						already = true
						break
					}
				}
				if !already {
					sectors = append(sectors, sec)
					//log.Printf("%d > %d", sector.Sector, sec)
					added = true
					break
				}
			}
		}
		// Cross link
		for _, s := range sectors {
			result[sec_num].Sectors = append(result[sec_num].Sectors, s)
			result[s-1].Sectors = append(result[s-1].Sectors, YTSectorType(sec_num))
			//log.Printf("%d > %v", sector.Sector, sector.Sectors)
			//log.Printf("%d < %v", s, result[s].Sectors)
		}
	}
	return result, nil
}