// Query to Create a New Scenario and its Delta (MODIFIES relationship)
// This allows defining a new 'what-if' scenario by specifying changes to a job's properties.

// Parameters:
// :new_scenario_id => 'what-if-2'
// :description => 'Job 5 기간 단축 시나리오'
// :target_job_id => 5
// :new_duration_value => 3
// :new_cost_value => 50

// 1. Create the new Scenario node if it doesn't already exist
MERGE (s:Scenario {id: $new_scenario_id})
ON CREATE SET s.description = $description

// 2. Find the target Job to modify
MATCH (j:Job {id: $target_job_id})

// 3. Create or update the MODIFIES relationship between the Scenario and the Job
//    This relationship holds the delta (the new property values for this scenario)
MERGE (s)-[m:MODIFIES]->(j)
ON CREATE SET m.new_duration = $new_duration_value, m.new_cost = $new_cost_value
ON MATCH SET m.new_duration = $new_duration_value, m.new_cost = $new_cost_value

// 4. Return the created/updated Scenario and the modified Job for confirmation
RETURN s, m, j;