import { requireAuth, requireCap } from '../auth.js'
import { pool, logActivity } from '../db.js'
import { batchSetZoneTemperature, setTargetWithRetry } from '../lib/mqtt.js'
import { commandAcDevice } from '../lib/ac-control.js'
import * as mhiDriver from '../lib/drivers/mhi-modbus.js'

// Manual force-temperature — the equivalent of the old integration's
// newbook.force_room_temperature service. Disables auto mode for the zone so the
// scheduler leaves it alone until staff switch auto mode back on (zones.js PATCH).
export async function overrideRoutes(app) {
  app.addHook('preHandler', requireAuth)

  app.post('/api/zones/:id/override', { preHandler: requireCap('control') }, async (req, reply) => {
    const { temp_c } = req.body || {}
    const tempC = Number(temp_c)
    if (!Number.isFinite(tempC)) return reply.status(400).send({ error: 'temp_c must be a number' })

    const { rows } = await pool.query('SELECT * FROM zones WHERE id = $1', [req.params.id])
    if (!rows.length) return reply.status(404).send({ error: 'Zone not found' })
    const zone = rows[0]

    await pool.query('UPDATE zones SET auto_mode = FALSE WHERE id = $1', [zone.id])

    const { rows: devices } = await pool.query(
      `SELECT external_ref, device_ip FROM zone_devices WHERE zone_id = $1 AND device_type = 'shelly_trv'`,
      [zone.id]
    )
    if (!devices.length) {
      return reply.status(200).send({ ok: false, error: 'No TRVs mapped to this zone', auto_mode: false })
    }

    const results = await batchSetZoneTemperature(devices, tempC)
    const successful = Object.values(results).filter(Boolean).length

    await logActivity(zone.id, 'override', {
      note: `Manual override to ${tempC}°C (${successful}/${devices.length} devices, auto mode disabled)`,
      source: 'manual',
      userEmail: req.user.email,
    })

    return { ok: successful > 0, successful, total: devices.length, auto_mode: false }
  })

  // GET /api/devices/:id/mhi-status — live status for one assigned MHI aircon unit.
  // mhi_mqtt: served from the push-populated status cache (mqtt.js keeps it fresh
  // from the gateway's retained topics). mhi_modbus: live Modbus round-trip read.
  app.get('/api/devices/:id/mhi-status', { preHandler: requireCap('view') }, async (req, reply) => {
    const { rows } = await pool.query(
      `SELECT * FROM zone_devices WHERE id = $1 AND device_type IN ('mhi_modbus', 'mhi_mqtt')`,
      [req.params.id]
    )
    if (!rows.length) return reply.status(404).send({ error: 'MHI device not found' })
    const device = rows[0]

    if (device.device_type === 'mhi_mqtt') {
      return {
        external_ref: device.external_ref,
        onOff: device.power_state ?? undefined,
        mode: device.current_mode ?? undefined,
        setpoint: device.current_target_temp != null ? Number(device.current_target_temp) : undefined,
        fanSpeed: device.fan_speed ?? undefined,
        roomTemp: device.current_room_temp != null ? Number(device.current_room_temp) : undefined,
      }
    }

    const status = await mhiDriver.getStatus(device.external_ref)
    if (!status || status.error) {
      return reply.status(502).send({ error: status?.error || 'Failed to read device status' })
    }
    return status
  })

  // POST /api/devices/:id/mhi-control — explicit staff control from the room modal's
  // MhiControlPanel. Body: { onOff?, mode?, tempC?, fanSpeed? } — only the fields present
  // are written. The actual write path (mhi_mqtt publish vs mhi_modbus register write,
  // plus optimistic cache update) lives in lib/ac-control.js's commandAcDevice(), shared
  // with the scheduler's automatic occupied/vacant AC control (lib/scheduler.js).
  app.post('/api/devices/:id/mhi-control', { preHandler: requireCap('control') }, async (req, reply) => {
    const { rows } = await pool.query(
      `SELECT * FROM zone_devices WHERE id = $1 AND device_type IN ('mhi_modbus', 'mhi_mqtt')`,
      [req.params.id]
    )
    if (!rows.length) return reply.status(404).send({ error: 'MHI device not found' })
    const device = rows[0]
    const { onOff, mode, tempC, fanSpeed } = req.body || {}

    const { ok } = await commandAcDevice(device, { onOff, mode, tempC, fanSpeed }, { origin: 'manual', log: req.log })

    await logActivity(device.zone_id, 'device_command', {
      note: `MHI manual control on ${device.location || device.discovered_name || device.external_ref}: ${JSON.stringify({ onOff, mode, tempC, fanSpeed })}${ok ? '' : ' — FAILED'}`,
      source: 'manual',
      userEmail: req.user.email,
    })

    return { ok }
  })

  // GET /api/devices/:id/daikin-status — served from the poll-populated cache
  // (lib/daikin-poller.js), same "read the row, don't do a live round trip" shape as
  // the mhi_mqtt branch above — Daikin has no push mechanism either, but a live HTTP
  // call on every panel open would be slower and the cache is at most POLL_MS stale.
  app.get('/api/devices/:id/daikin-status', { preHandler: requireCap('view') }, async (req, reply) => {
    const { rows } = await pool.query(
      `SELECT * FROM zone_devices WHERE id = $1 AND device_type = 'daikin'`,
      [req.params.id]
    )
    if (!rows.length) return reply.status(404).send({ error: 'Daikin device not found' })
    const device = rows[0]

    return {
      external_ref: device.external_ref,
      onOff: device.power_state ?? undefined,
      mode: device.current_mode ?? undefined,
      setpoint: device.current_target_temp != null ? Number(device.current_target_temp) : undefined,
      fanSpeed: device.fan_speed ?? undefined,
      roomTemp: device.current_room_temp != null ? Number(device.current_room_temp) : undefined,
      status_updated_at: device.status_updated_at,
    }
  })

  // POST /api/devices/:id/daikin-control — explicit staff control from DaikinControlPanel.
  // Body: { onOff?, mode?, tempC?, fanSpeed? }. Shares commandAcDevice() with the mhi
  // routes above and with the scheduler's automatic occupied/vacant AC control.
  app.post('/api/devices/:id/daikin-control', { preHandler: requireCap('control') }, async (req, reply) => {
    const { rows } = await pool.query(
      `SELECT * FROM zone_devices WHERE id = $1 AND device_type = 'daikin'`,
      [req.params.id]
    )
    if (!rows.length) return reply.status(404).send({ error: 'Daikin device not found' })
    const device = rows[0]
    const { onOff, mode, tempC, fanSpeed } = req.body || {}

    const { ok } = await commandAcDevice(device, { onOff, mode, tempC, fanSpeed }, { origin: 'manual', log: req.log })

    await logActivity(device.zone_id, 'device_command', {
      note: `Daikin manual control on ${device.location || device.discovered_name || device.external_ref}: ${JSON.stringify({ onOff, mode, tempC, fanSpeed })}${ok ? '' : ' — FAILED'}`,
      source: 'manual',
      userEmail: req.user.email,
    })

    return { ok }
  })

  // GET /api/devices/:id/trv-status — live status for one assigned Shelly TRV, served
  // from the push-populated cache (mqtt.js keeps current_target_temp/current_room_temp/
  // battery_pct fresh from shellies/+/status, valve_position/wifi_rssi from
  // shellies/+/info) — same "read the row, don't round-trip" shape as mhi_mqtt/daikin.
  app.get('/api/devices/:id/trv-status', { preHandler: requireCap('view') }, async (req, reply) => {
    const { rows } = await pool.query(
      `SELECT * FROM zone_devices WHERE id = $1 AND device_type = 'shelly_trv'`,
      [req.params.id]
    )
    if (!rows.length) return reply.status(404).send({ error: 'TRV not found' })
    const device = rows[0]

    return {
      external_ref: device.external_ref,
      setpoint: device.current_target_temp != null ? Number(device.current_target_temp) : undefined,
      roomTemp: device.current_room_temp != null ? Number(device.current_room_temp) : undefined,
      heatingActive: device.heating_active,
      valvePosition: device.valve_position,
      wifiRssi: device.wifi_rssi,
      batteryPct: device.battery_pct,
      targetOrigin: device.target_origin,
      lastSeen: device.last_seen,
      statusUpdatedAt: device.status_updated_at,
    }
  })

  // POST /api/devices/:id/trv-control — explicit staff setpoint change from the room
  // modal's TrvControlPanel. Body: { tempC }. Goes through setTargetWithRetry() for the
  // full reliability pipeline (30s->30min backoff, HTTP wake-up fallback) — same
  // function the zone-level /override route above uses per-device, just for one TRV.
  app.post('/api/devices/:id/trv-control', { preHandler: requireCap('control') }, async (req, reply) => {
    const { rows } = await pool.query(
      `SELECT * FROM zone_devices WHERE id = $1 AND device_type = 'shelly_trv'`,
      [req.params.id]
    )
    if (!rows.length) return reply.status(404).send({ error: 'TRV not found' })
    const device = rows[0]
    const tempC = Number(req.body?.tempC)
    if (!Number.isFinite(tempC)) return reply.status(400).send({ error: 'tempC must be a number' })

    const ok = await setTargetWithRetry({ external_ref: device.external_ref, device_ip: device.device_ip }, tempC)

    await logActivity(device.zone_id, 'device_command', {
      note: `TRV manual setpoint on ${device.location || device.discovered_name || device.external_ref}: ${tempC}°C${ok ? '' : ' — FAILED'}`,
      source: 'manual',
      userEmail: req.user.email,
    })

    return { ok }
  })
}