import { bonus, evaluateNode, mergeMissing } from 'Engine/evaluation'
import { map, mergeAll, pick, pipe } from 'ramda'
import { anyNull, undefOrTrue, val } from './traverse-common-functions'

export const evaluateApplicability = (cache, situationGate, parsedRules, node) => {
	let evaluatedAttributes = pipe(
		pick([
			'parentDependency',
			'non applicable si',
			'applicable si',
			'rendu non applicable'
		]),
		map(value => evaluateNode(cache, situationGate, parsedRules, value))
	)(node),
		{
			parentDependency,
			'non applicable si': notApplicable,
			'applicable si': applicable,
			'rendu non applicable': disabled
		} = evaluatedAttributes,
		isApplicable =
			val(parentDependency) === false ||
				val(notApplicable) === true ||
				val(applicable) === false ||
				val(disabled) === true
				? false
				: anyNull([notApplicable, applicable, parentDependency])
					? null
					: !val(notApplicable) && undefOrTrue(val(applicable)),
		missingVariables =
			isApplicable === false
				? {}
				: mergeAll([
					parentDependency ?.missingVariables || {},
					notApplicable ?.missingVariables || {},
					applicable ?.missingVariables || {}
							  ])
	// On veut abaisser le score des conséquences par rapport aux conditions,
	// mais seulement dans le cas où une condition est effectivement présente
	return { nodeValue: isApplicable, missingVariables, ...evaluatedAttributes, inactiveParent: parentDependency && val(parentDependency) == false }
}
export default (cache, situationGate, parsedRules, node) => {
	cache.parseLevel++
	let
		applicabilityEvaluation = evaluateApplicability(cache, situationGate, parsedRules, node),
		{ missingVariables: condMissing, nodeValue: isApplicable } = applicabilityEvaluation,
		evaluateFormula = () =>
			node.formule
				? evaluateNode(cache, situationGate, parsedRules, node.formule)
				: {},
		// evaluate the formula lazily, only if the applicability is known and true
		evaluatedFormula =
			isApplicable
				? evaluateFormula()
				: isApplicable === false
					? {
						...node.formule,
						missingVariables: {},
						nodeValue: 0
					}
					: {
						...node.formule,
						missingVariables: {},
						nodeValue: null
					},
		{ missingVariables: formulaMissingVariables, nodeValue } = evaluatedFormula,

		missingVariables = mergeMissing(
			bonus(condMissing, !!Object.keys(condMissing).length),
			formulaMissingVariables
		)
	cache.parseLevel--

	return {
		...node,
		...applicabilityEvaluation,
		...{ formule: evaluatedFormula },
		nodeValue,
		isApplicable,
		missingVariables,

	}
}