import { scormState } from '$core/scorm/index.js';
import { untrack } from 'svelte';
import type { TestHandle } from './types.js';

const PERCENTAGE = 100;

class TestRegistry {
	#tests = $state(new Map<string, TestHandle>());

	register(test: TestHandle): void {
		this.#tests.set(test.fullId, test);
	}

	unregister(testId: string): void {
		this.#tests.delete(testId);
	}

	get contributingTests(): TestHandle[] {
		return [...this.#tests.values()];
	}

	get courseScorePercentage(): number {
		const tests = this.contributingTests;
		if (tests.length === 0) return 0;
		const total = tests.reduce((sum, t) => sum + t.score, 0);
		return total / tests.length;
	}

	get allTestsPassed(): boolean {
		const tests = this.contributingTests;
		if (tests.length === 0) return false;
		return tests.every((t) => t.isPassed);
	}

	syncCourseScore(): void {
		const percentage = this.courseScorePercentage;
		if (percentage <= 0) return;

		const min = scormState.score.min ?? 0;
		const max = scormState.score.max ?? PERCENTAGE;
		const raw = min + (percentage / PERCENTAGE) * (max - min);
		scormState.score.raw = raw;

		if (this.allTestsPassed) {
			untrack(() => {
				scormState.completion.setPassed();
			});
		}
	}
}

export const testRegistry = new TestRegistry();