package main

import (
	"errors"
	"fmt"
)

// CompleteSplit marks a split as finished and unlocks its dependent splits if they have no other dependencies
func CompleteSplit(session *Session, split *Split) error {
	fmt.Printf("Splitting split %s (%s)\n", split.Name, split.State)
	if split.State == Locked {
		fmt.Println("Death!!")
		return errors.New("cannot complete a split that is locked")
	}

	// Set provided split to finished
	split.State = Finished

	// Iterate over dependencies
	for _, dep := range split.Dependencies {
		// Check if dependency has no other dependencies
		hasOtherDependencies := false
		for _, otherDep := range session.Graph.Splits {
			if otherDep == dep || otherDep.State == Finished {
				continue
			}
			for _, otherDep2 := range otherDep.Dependencies {
				if otherDep2 == dep {
					hasOtherDependencies = true
					break
				}
			}
			if hasOtherDependencies {
				break
			}
		}

		// If no other dependencies, set dependency to unlocked
		if !hasOtherDependencies {
			dep.State = Unlocked
		}
	}

	return nil
}