{% extends "base.html" %}
{% block content %}
<h1>Settings</h1>

<div class="card">
  <h3>Household</h3>
  <form class="settings-form" id="household-form">
    <label>Distributor
      <select name="distributor">
        <option value="Energex">Energex (South East QLD)</option>
        <option value="Ergon">Ergon Energy (regional QLD)</option>
      </select>
    </label>
    <label>Postcode <input name="postcode" placeholder="e.g. 4000"></label>
    <button type="submit">Save</button>
  </form>
</div>

<div class="card">
  <h3>iSolarCloud connection</h3>
  {% if use_mock_isolarcloud %}
    <p class="muted">
      Currently running on <strong>synthetic mock data</strong> (<code>USE_MOCK_ISOLARCLOUD=true</code>).
      Once you have your App Key, Secret Key and iSolarCloud username/password filled in your
      <code>.env</code> (see SETUP.md), set <code>USE_MOCK_ISOLARCLOUD=false</code> and restart,
      then test the connection below.
    </p>
  {% elif isolarcloud_auth_mode == "oauth2" %}
    <p id="isolarcloud-status" class="muted">Checking connection status&hellip;</p>
    <button type="button" id="oauth-reconnect-toggle" style="display:none;">Reconnect / use a different account</button>
    <div id="oauth-connect-block">
      <p class="muted">
        1. Open the authorization link below in your own browser, log in with your iSolarCloud account, and approve access.<br>
        2. You'll land on a page that fails to load (that's expected -- it's an https://localhost redirect) -- copy the
        <code>code=</code> value from the address bar.<br>
        3. Paste just the code below and click Connect.
      </p>
      <p><a id="oauth-authorize-link" href="#" target="_blank" rel="noopener">Open authorization link</a></p>
      <label>Authorization code <input id="oauth-code-input" placeholder="paste the code= value here"></label>
      <button type="button" id="oauth-connect-btn">Connect</button>
    </div>
    <div id="isolarcloud-plants" style="margin-top:1rem;"></div>
  {% else %}
    <p id="isolarcloud-status" class="muted">Checking connection status&hellip;</p>
    <button type="button" id="isolarcloud-connect">Test connection</button>
    <div id="isolarcloud-plants" style="margin-top:1rem;"></div>
  {% endif %}
  <div id="isolarcloud-flash"></div>
</div>

<div class="card">
  <h3>Your current plan</h3>
  <p class="muted">Entered manually so the comparison has a baseline to measure savings against.</p>
  <form class="settings-form" id="plan-form">
    <label>Retailer name <input name="retailer_name" required></label>
    <label>Plan name <input name="plan_name" required></label>
    <label>Supply charge ($/day) <input name="supply_charge_dollars_per_day" type="number" step="0.001" required></label>
    <label>Plan discount already applied, if any (%) <input name="discount_percent" type="number" step="0.1"></label>

    <label>Feed-in tariff type
      <select name="feed_in_type" id="feed-in-type">
        <option value="flat">Flat rate</option>
        <option value="tiered">Tiered by daily export (e.g. "Solar Balance")</option>
      </select>
    </label>

    <div id="flat-fit-fields">
      <label>Feed-in tariff (c/kWh) <input name="feed_in_tariff_c_per_kwh" type="number" step="0.01" value="0"></label>
    </div>

    <div id="tiered-fit-fields" style="display:none;">
      <label>Daily threshold (kWh/day) <input name="tiered_daily_threshold_kwh" type="number" step="0.01" placeholder="e.g. 10"></label>
      <label>Rate below threshold (c/kWh) <input name="tiered_rate_below_c_per_kwh" type="number" step="0.01"></label>
      <label>Rate above threshold (c/kWh) <input name="tiered_rate_above_c_per_kwh" type="number" step="0.01"></label>
    </div>

    <label>Tariff type
      <select name="tariff_type" id="tariff-type">
        <option value="flat">Flat rate</option>
        <option value="time_of_use">Time of use</option>
      </select>
    </label>

    <div id="flat-fields">
      <label>Usage rate (c/kWh) <input name="flat_rate_c_per_kwh" type="number" step="0.01"></label>
    </div>

    <div id="tou-fields" style="display:none;">
      <div id="tou-periods"></div>
      <button type="button" id="add-period">+ Add time period</button>
    </div>

    <button type="submit">Save current plan</button>
  </form>
</div>

<script>
async function loadHousehold() {
  const cfg = await fetch('/api/settings/household').then(r => r.json());
  const form = document.getElementById('household-form');
  form.distributor.value = cfg.distributor || 'Energex';
  form.postcode.value = cfg.postcode || '';
}

document.getElementById('household-form').addEventListener('submit', async (e) => {
  e.preventDefault();
  const form = e.target;
  await fetch('/api/settings/household', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ distributor: form.distributor.value, postcode: form.postcode.value }),
  });
  alert('Saved.');
});

const tariffType = document.getElementById('tariff-type');
const flatFields = document.getElementById('flat-fields');
const touFields = document.getElementById('tou-fields');
const touPeriods = document.getElementById('tou-periods');
const feedInType = document.getElementById('feed-in-type');
const flatFitFields = document.getElementById('flat-fit-fields');
const tieredFitFields = document.getElementById('tiered-fit-fields');

feedInType.addEventListener('change', () => {
  const isFlat = feedInType.value === 'flat';
  flatFitFields.style.display = isFlat ? 'block' : 'none';
  tieredFitFields.style.display = isFlat ? 'none' : 'block';
});

const ALL_DAYS = ['MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT', 'SUN'];

function periodRow(values) {
  values = values || { label: '', rate_c_per_kwh: '', start_time: '00:00', end_time: '00:00', days: null };
  const days = values.days || ALL_DAYS;
  const div = document.createElement('div');
  div.className = 'tou-period';
  const dayCheckboxes = ALL_DAYS.map(d => `
    <label class="p-day-label"><input type="checkbox" class="p-day" value="${d}" ${days.includes(d) ? 'checked' : ''}>${d}</label>
  `).join('');
  div.innerHTML = `
    <label>Label <input class="p-label" value="${values.label}" placeholder="e.g. Peak"></label>
    <label>Rate (c/kWh) <input class="p-rate" type="number" step="0.01" value="${values.rate_c_per_kwh}"></label>
    <label>Start time <input class="p-start" type="time" value="${values.start_time}"></label>
    <label>End time <input class="p-end" type="time" value="${values.end_time}"></label>
    <div class="p-days-group">Days: ${dayCheckboxes}</div>
    <button type="button" class="p-remove">Remove</button>
  `;
  div.querySelector('.p-remove').addEventListener('click', () => div.remove());
  touPeriods.appendChild(div);
}

document.getElementById('add-period').addEventListener('click', () => periodRow());

tariffType.addEventListener('change', () => {
  const isFlat = tariffType.value === 'flat';
  flatFields.style.display = isFlat ? 'block' : 'none';
  touFields.style.display = isFlat ? 'none' : 'block';
  if (!isFlat && touPeriods.children.length === 0) {
    periodRow({ label: 'Peak', rate_c_per_kwh: '', start_time: '16:00', end_time: '21:00' });
    periodRow({ label: 'Off-peak', rate_c_per_kwh: '', start_time: '21:00', end_time: '16:00' });
  }
});

async function loadCurrentPlan() {
  const plan = await fetch('/api/settings/current-plan').then(r => r.json());
  if (!plan) return;
  const form = document.getElementById('plan-form');
  form.retailer_name.value = plan.retailer;
  form.plan_name.value = plan.plan_name;
  form.supply_charge_dollars_per_day.value = (plan.supply_charge_c_per_day / 100).toFixed(4);

  if (plan.tiered_feed_in) {
    feedInType.value = 'tiered';
    form.tiered_daily_threshold_kwh.value = plan.tiered_feed_in.daily_threshold_kwh;
    form.tiered_rate_below_c_per_kwh.value = plan.tiered_feed_in.rate_below_c_per_kwh;
    form.tiered_rate_above_c_per_kwh.value = plan.tiered_feed_in.rate_above_c_per_kwh;
  } else {
    feedInType.value = 'flat';
    form.feed_in_tariff_c_per_kwh.value = plan.feed_in_tariffs[0] ? plan.feed_in_tariffs[0].rate_c_per_kwh : 0;
  }
  feedInType.dispatchEvent(new Event('change'));

  const discount = (plan.discounts || [])[0];
  if (discount && discount.percent) form.discount_percent.value = discount.percent;

  const isFlat = plan.usage_components.length === 1 && plan.usage_components[0].time_windows.length === 0;
  tariffType.value = isFlat ? 'flat' : 'time_of_use';
  tariffType.dispatchEvent(new Event('change'));
  if (isFlat) {
    form.flat_rate_c_per_kwh.value = plan.usage_components[0].rate_c_per_kwh;
  } else {
    touPeriods.innerHTML = '';
    plan.usage_components.forEach(c => {
      const w = c.time_windows[0] || { start_time: '00:00', end_time: '00:00', days: null };
      periodRow({
        label: c.label,
        rate_c_per_kwh: c.rate_c_per_kwh,
        start_time: w.start_time.slice(0, 5),
        end_time: w.end_time.slice(0, 5),
        days: w.days,
      });
    });
  }
}

document.getElementById('plan-form').addEventListener('submit', async (e) => {
  e.preventDefault();
  const form = e.target;
  const payload = {
    retailer_name: form.retailer_name.value,
    plan_name: form.plan_name.value,
    supply_charge_dollars_per_day: parseFloat(form.supply_charge_dollars_per_day.value),
    discount_percent: form.discount_percent.value ? parseFloat(form.discount_percent.value) : null,
    tariff_type: tariffType.value,
    feed_in_type: feedInType.value,
  };
  if (tariffType.value === 'flat') {
    payload.flat_rate_c_per_kwh = parseFloat(form.flat_rate_c_per_kwh.value);
  } else {
    payload.tou_periods = Array.from(touPeriods.children).map(div => {
      const checkedDays = Array.from(div.querySelectorAll('.p-day:checked')).map(cb => cb.value);
      return {
        label: div.querySelector('.p-label').value,
        rate_c_per_kwh: parseFloat(div.querySelector('.p-rate').value),
        start_time: div.querySelector('.p-start').value,
        end_time: div.querySelector('.p-end').value,
        days: checkedDays.length ? checkedDays : null,
      };
    });
  }
  if (feedInType.value === 'flat') {
    payload.feed_in_tariff_c_per_kwh = parseFloat(form.feed_in_tariff_c_per_kwh.value || 0);
  } else {
    payload.tiered_daily_threshold_kwh = parseFloat(form.tiered_daily_threshold_kwh.value);
    payload.tiered_rate_below_c_per_kwh = parseFloat(form.tiered_rate_below_c_per_kwh.value);
    payload.tiered_rate_above_c_per_kwh = parseFloat(form.tiered_rate_above_c_per_kwh.value);
  }
  const resp = await fetch('/api/settings/current-plan', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(payload),
  });
  if (resp.ok) {
    alert('Current plan saved.');
  } else {
    const err = await resp.json();
    alert('Failed to save: ' + JSON.stringify(err));
  }
});

async function checkIsolarcloudStatus() {
  const el = document.getElementById('isolarcloud-status');
  if (!el) return;
  const status = await fetch('/api/isolarcloud/status').then(r => r.json());
  el.textContent = status.connected
    ? 'Connected -- a valid token is cached.'
    : 'Not connected yet.';

  // Only oauth2 mode has the connect-block/reconnect-toggle pair.
  const connectBlock = document.getElementById('oauth-connect-block');
  const reconnectToggle = document.getElementById('oauth-reconnect-toggle');
  if (!connectBlock || !reconnectToggle) return;
  if (status.connected) {
    connectBlock.style.display = 'none';
    reconnectToggle.style.display = 'inline-block';
  } else {
    connectBlock.style.display = 'block';
    reconnectToggle.style.display = 'none';
  }
}

function renderPlantPicker(plants) {
  const plantsEl = document.getElementById('isolarcloud-plants');
  if (!plants || !plants.length) {
    plantsEl.innerHTML = '';
    return;
  }
  const options = plants.map(p => `<option value="${p.ps_id}">${p.ps_name || p.ps_id} (${p.ps_id})</option>`).join('');
  plantsEl.innerHTML = `
    <label>Plant to poll
      <select id="plant-select">${options}</select>
    </label>
    <button type="button" id="save-plant">Use this plant</button>
  `;
  fetch('/api/settings/household').then(r => r.json()).then(household => {
    if (household.isolarcloud_ps_id) document.getElementById('plant-select').value = household.isolarcloud_ps_id;
  });
  document.getElementById('save-plant').addEventListener('click', async () => {
    const household = await fetch('/api/settings/household').then(r => r.json());
    await fetch('/api/settings/household', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ ...household, isolarcloud_ps_id: document.getElementById('plant-select').value }),
    });
    alert('Saved.');
  });
}

async function connectIsolarcloud() {
  const flash = document.getElementById('isolarcloud-flash');
  flash.innerHTML = '<p class="muted">Connecting&hellip;</p>';
  document.getElementById('isolarcloud-plants').innerHTML = '';
  const resp = await fetch('/api/isolarcloud/connect', { method: 'POST' });
  const data = await resp.json();
  if (!data.ok) {
    flash.innerHTML = `<p style="color: var(--bad);">Connection failed: ${data.error}</p>`;
    return;
  }
  flash.innerHTML = '<p style="color: var(--good);">Connected successfully.</p>';
  renderPlantPicker(data.plants);
}

const connectButton = document.getElementById('isolarcloud-connect');
if (connectButton) connectButton.addEventListener('click', connectIsolarcloud);

const oauthAuthorizeLink = document.getElementById('oauth-authorize-link');
if (oauthAuthorizeLink) {
  fetch('/api/isolarcloud/oauth/authorize-url').then(r => r.json()).then(data => {
    oauthAuthorizeLink.href = data.url;
  });
  document.getElementById('oauth-reconnect-toggle').addEventListener('click', () => {
    document.getElementById('oauth-connect-block').style.display = 'block';
  });
  document.getElementById('oauth-connect-btn').addEventListener('click', async () => {
    const flash = document.getElementById('isolarcloud-flash');
    let code = document.getElementById('oauth-code-input').value.trim();
    // Accept a full pasted URL too, not just the bare code.
    const match = code.match(/[?&]code=([^&]+)/);
    if (match) code = decodeURIComponent(match[1]);
    if (!code) {
      flash.innerHTML = '<p style="color: var(--bad);">Paste the authorization code first.</p>';
      return;
    }
    flash.innerHTML = '<p class="muted">Exchanging code&hellip;</p>';
    document.getElementById('isolarcloud-plants').innerHTML = '';
    const resp = await fetch('/api/isolarcloud/oauth/exchange', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ code }),
    });
    const data = await resp.json();
    if (!data.ok) {
      flash.innerHTML = `<p style="color: var(--bad);">Connection failed: ${data.error}</p>`;
      return;
    }
    flash.innerHTML = '<p style="color: var(--good);">Connected successfully.</p>';
    renderPlantPicker(data.authorized_plants);
  });
}

loadHousehold();
loadCurrentPlan();
checkIsolarcloudStatus();
</script>
{% endblock %}