import { Controller } from '@hotwired/stimulus';

export default class extends Controller {
    static targets = ['item', 'importBtn'];

    connect() {
        this._poll();
        this._interval = setInterval(() => this._poll(), 5000);
        this._onImportStarted = () => this._poll();
        document.addEventListener('import:started', this._onImportStarted);
    }

    disconnect() {
        clearInterval(this._interval);
        document.removeEventListener('import:started', this._onImportStarted);
    }

    async _poll() {
        try {
            const response = await fetch('/api/imports/latest');
            if (!response.ok) return;

            const data = await response.json();
            this._update(data);
        } catch (e) {
            // silently ignore
        }
    }

    _update(data) {
        if (!data) {
            this._showDefault();
            return;
        }

        const isActive = data.status === 'pending' || data.status === 'processing';

        if (isActive) {
            this._showActive(data);
        } else if (data.status === 'completed') {
            this._showCompleted(data);
        } else if (data.status === 'failed') {
            this._showFailed();
        } else {
            this._showDefault();
        }
    }

    _showDefault() {
        this.importBtnTarget.disabled = false;
        this.importBtnTarget.textContent = 'Importer ses films';
        this._removeStatus();
    }

    _showActive(data) {
        this.importBtnTarget.disabled = true;
        this.importBtnTarget.textContent = 'Import en cours\u2026';

        const progress = data.totalFilms > 0
            ? Math.round((data.processedFilms / data.totalFilms) * 100)
            : 0;

        this._setStatus(`${progress}% — ${data.processedFilms}/${data.totalFilms} films`, 'active');
    }

    _showCompleted(data) {
        this.importBtnTarget.disabled = false;
        this.importBtnTarget.textContent = 'Importer ses films';

        const imported = data.totalFilms - data.failedFilms;
        this._setStatus(`Dernier import : ${imported}/${data.totalFilms} films`, 'completed');
    }

    _showFailed() {
        this.importBtnTarget.disabled = false;
        this.importBtnTarget.textContent = 'Importer ses films';
        this._setStatus('Dernier import : échoué', 'failed');
    }

    _setStatus(text, type) {
        let statusEl = this.itemTarget.querySelector('.import-status-text');
        if (!statusEl) {
            statusEl = document.createElement('span');
            statusEl.className = 'import-status-text';
            this.itemTarget.appendChild(statusEl);
        }
        statusEl.textContent = text;
        statusEl.className = `import-status-text import-status-${type}`;
    }

    _removeStatus() {
        const statusEl = this.itemTarget.querySelector('.import-status-text');
        if (statusEl) statusEl.remove();
    }
}