import { SCORM12, SCORM2004 } from './data-model.js';
import { ScormWrapper } from './api-adapter.js';
import type { Scorm2004CompletionStatus, Scorm2004SuccessStatus } from './types.js';

export class CompletionState {
	#completionStatus = $state<Scorm2004CompletionStatus>('incomplete');
	#successStatus = $state<Scorm2004SuccessStatus>('unknown');
	#wrapper: ScormWrapper;

	constructor(wrapper: ScormWrapper) {
		this.#wrapper = wrapper;
	}

	get status(): Scorm2004CompletionStatus {
		return this.#completionStatus;
	}

	get success(): Scorm2004SuccessStatus {
		return this.#successStatus;
	}

	setCompleted(): void {
		if (this.#wrapper.version === '2004') {
			this.#wrapper.setValue(SCORM2004.COMPLETION_STATUS, 'completed');
		} else {
			this.#wrapper.setValue(SCORM12.CORE_LESSON_STATUS, 'completed');
		}
		this.#completionStatus = 'completed';
		this.#wrapper.commit();
	}

	setPassed(): void {
		if (this.#wrapper.version === '2004') {
			this.#wrapper.setValue(SCORM2004.COMPLETION_STATUS, 'completed');
			this.#wrapper.setValue(SCORM2004.SUCCESS_STATUS, 'passed');
		} else {
			this.#wrapper.setValue(SCORM12.CORE_LESSON_STATUS, 'passed');
		}
		this.#completionStatus = 'completed';
		this.#successStatus = 'passed';
		this.#wrapper.commit();
	}

	setFailed(): void {
		if (this.#wrapper.version === '2004') {
			this.#wrapper.setValue(SCORM2004.COMPLETION_STATUS, 'completed');
			this.#wrapper.setValue(SCORM2004.SUCCESS_STATUS, 'failed');
		} else {
			this.#wrapper.setValue(SCORM12.CORE_LESSON_STATUS, 'failed');
		}
		this.#completionStatus = 'completed';
		this.#successStatus = 'failed';
		this.#wrapper.commit();
	}

	setIncomplete(): void {
		if (this.#wrapper.version === '2004') {
			this.#wrapper.setValue(SCORM2004.COMPLETION_STATUS, 'incomplete');
		} else {
			this.#wrapper.setValue(SCORM12.CORE_LESSON_STATUS, 'incomplete');
		}
		this.#completionStatus = 'incomplete';
		this.#wrapper.commit();
	}

	load(wrapper: ScormWrapper): void {
		if (wrapper.version === '2004') {
			this.#completionStatus = wrapper.getValue(
				SCORM2004.COMPLETION_STATUS
			) as Scorm2004CompletionStatus;
			this.#successStatus = wrapper.getValue(SCORM2004.SUCCESS_STATUS) as Scorm2004SuccessStatus;
			return;
		}
		this.#loadScorm12Status(wrapper);
	}

	#loadScorm12Status(wrapper: ScormWrapper): void {
		const raw = wrapper.getValue(SCORM12.CORE_LESSON_STATUS);
		switch (raw) {
			case 'passed': {
				this.#completionStatus = 'completed';
				this.#successStatus = 'passed';
				break;
			}
			case 'failed': {
				this.#completionStatus = 'completed';
				this.#successStatus = 'failed';
				break;
			}
			case 'completed': {
				this.#completionStatus = 'completed';
				this.#successStatus = 'unknown';
				break;
			}
			default: {
				this.#completionStatus = 'incomplete';
				this.#successStatus = 'unknown';
			}
		}
	}
}