// scenario-form.js — общий редактор шагов сценария (create + edit)
let scenarioEditorState = null;  // {defId, version, name, steps:[]}
// steps: [{service_id, operation, params: [["key","val"],...]}]

function showScenarioEditor(def) {
    const body = document.getElementById('scenario-body');
    scenarioEditorState = def ? {
        defId: def.id, version: def.version, name: def.name,
        steps: (def.steps || []).map(s => ({
            service_id: s.service_id, operation: s.operation,
            params: Object.entries(s.params || {})
        }))
    } : { defId: null, version: 1, name: '', steps: [] };
    renderEditor();
}

function renderEditor() {
    const body = document.getElementById('scenario-body');
    const st = scenarioEditorState;
    let html = '<div style="font-size:12px;">';
    html += '<div style="margin-bottom:6px;"><label style="font-size:11px;">Название:</label><br>';
    html += `<input type="text" id="scenario-name" value="${_esc(st.name)}" style="width:100%;padding:4px;" placeholder="my_test">`;
    html += '</div>';
    html += '<div style="margin-bottom:6px;font-size:11px;font-weight:600;">Шаги:</div>';
    st.steps.forEach((s, idx) => {
        html += renderStepRow(idx, s);
    });
    html += `<button class="btn btn-sm" style="font-size:11px;margin-top:4px;" onclick="addStep()">+ Добавить шаг</button>`;
    html += '<div style="margin-top:8px;">';
    html += `<button class="btn btn-sm" style="font-size:11px;background:var(--brand-primary);color:#fff;" onclick="saveScenario()">Сохранить</button> `;
    html += '<button class="btn btn-sm" style="font-size:11px;" onclick="loadScenarios()">Отмена</button>';
    html += '</div></div>';
    body.innerHTML = html;
}

function renderStepRow(idx, step) {
    const svcId = step.service_id || '';
    const op = step.operation || '';
    const params = step.params || [];
    let html = `<div style="border:1px solid var(--brand-gray);border-radius:4px;padding:6px;margin:4px 0;" id="step-${idx}">`;
    html += `<div style="font-size:10px;color:var(--muted);margin-bottom:4px;">Шаг ${idx+1}`;
    html += ` <button class="btn btn-sm" style="font-size:9px;padding:0 4px;" onclick="removeStep(${idx})">✕</button>`;
    html += `</div>`;
    // Сервис — текстовое поле с подсказкой (ID или имя)
    html += `<input type="number" id="step-${idx}-svc" value="${svcId}" placeholder="service_id" style="width:80px;padding:2px;font-size:11px;" onchange="onStepChange(${idx})"> `;
    // Операция
    html += `<input type="text" id="step-${idx}-op" value="${_esc(op)}" placeholder="create" style="width:100px;padding:2px;font-size:11px;"> `;
    html += '<div style="margin-top:2px;">';
    params.forEach(([k, v], pi) => {
        html += `<div style="display:flex;gap:4px;align-items:center;margin:2px 0;">`;
        html += `<input type="text" id="step-${idx}-pk-${pi}" value="${_esc(k)}" placeholder="param" style="width:100px;padding:2px;font-size:10px;">`;
        html += `<span>=</span>`;
        html += `<input type="text" id="step-${idx}-pv-${pi}" value="${_esc(v)}" placeholder="value" style="width:120px;padding:2px;font-size:10px;">`;
        html += `<button class="btn btn-sm" style="font-size:9px;padding:0 3px;" onclick="removeParam(${idx},${pi});renderEditor();">✕</button>`;
        html += `</div>`;
    });
    html += `<button class="btn btn-sm" style="font-size:9px;margin-top:2px;" onclick="addParam(${idx});renderEditor();">+ Параметр</button>`;
    html += '</div></div>';
    return html;
}

function addStep() {
    scenarioEditorState.steps.push({ service_id: 1, operation: 'create', params: [] });
    renderEditor();
}

function removeStep(idx) {
    scenarioEditorState.steps.splice(idx, 1);
    renderEditor();
}

function addParam(idx) {
    scenarioEditorState.steps[idx].params.push(['', '']);
}

function removeParam(idx, pi) {
    scenarioEditorState.steps[idx].params.splice(pi, 1);
}

function onStepChange(idx) { /* placeholder for future auto-load */ }

function collectFormSteps() {
    const st = scenarioEditorState;
    const name = (document.getElementById('scenario-name')?.value || '').trim();
    const steps = [];
    st.steps.forEach((_, idx) => {
        const svcEl = document.getElementById(`step-${idx}-svc`);
        const opEl = document.getElementById(`step-${idx}-op`);
        const svcId = parseInt(svcEl?.value) || 0;
        const operation = (opEl?.value || '').trim();
        const params = {};
        st.steps[idx].params.forEach((__, pi) => {
            const k = document.getElementById(`step-${idx}-pk-${pi}`)?.value?.trim();
            const v = document.getElementById(`step-${idx}-pv-${pi}`)?.value || '';
            if (k) params[k] = v;
        });
        steps.push({ service_id: svcId, operation, params });
    });
    return { name, steps };
}

async function saveScenario() {
    const { name, steps } = collectFormSteps();
    if (!name) { alert('Введите название'); return; }
    if (!steps.length) { alert('Добавьте хотя бы один шаг'); return; }
    for (let i = 0; i < steps.length; i++) {
        if (!steps[i].service_id) { alert('Шаг ' + (i+1) + ': укажите service_id'); return; }
        if (!steps[i].operation) { alert('Шаг ' + (i+1) + ': укажите operation'); return; }
    }
    const st = scenarioEditorState;
    const isNew = !st.defId;
    const url = isNew ? '/api/scenario/definitions' : '/api/scenario/definitions/' + st.defId;
    const method = isNew ? 'POST' : 'PUT';
    const body = isNew ? { name, steps } : { name, steps, version: st.version };
    try {
        const r = await fetch(url, { method, headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) });
        const d = await r.json();
        if (r.status === 409) {
            alert('⚠️ Конфликт версий — кто-то уже изменил сценарий. Обновите страницу.');
            return;
        }
        if (d.error) { alert(d.error); return; }
        if (isNew && d.id) st.defId = d.id;
        if (d.version) st.version = d.version;
        await loadScenarios();
    } catch (e) {
        alert('Ошибка сохранения: ' + e.message);
    }
}