// ── Admin · Rust · NPCs: the handlers (docs/runicnpc/PLAN.md stage 4) ──────
//
// Thin: the model decides, and a refusal it throws carries its own status and
// sentence. Every write is logged in core's activity log, a placement's too,
// because a placement puts armed NPCs in the world.

const core = require('../../core')

const npcs = require('../../model/npcs/npcs.model')
const npcSync = require('../../npcSync')

const log = core.logger('npcs')

const by = (req) => (req.user ? req.user.id : null)

/** A model refusal answers with its own status; anything else is ours to log. */
function fail(res, err, what) {
  if (err instanceof npcs.NpcError) return res.status(err.status).json({ message: err.message })
  log.error(`failed to ${what}`, { error: err.message })
  return res.status(500).json({ message: `Failed to ${what}` })
}

async function describe(req, res) {
  try {
    res.json(await npcs.describe())
  } catch (err) {
    fail(res, err, 'read the NPC profiles')
  }
}

async function create(req, res) {
  try {
    const profile = await npcs.create(req.body || {}, by(req))
    await core.activity.log({ req, action: 'rust.npcs.profile.create', detail: { id: profile.id, name: profile.name } })
    res.status(201).json(profile)
  } catch (err) {
    fail(res, err, 'save the NPC profile')
  }
}

async function update(req, res) {
  try {
    const profile = await npcs.update(Number(req.params.pid), req.body || {})
    await core.activity.log({ req, action: 'rust.npcs.profile.update', detail: { id: profile.id, name: profile.name } })
    res.json(profile)
  } catch (err) {
    fail(res, err, 'save the NPC profile')
  }
}

async function remove(req, res) {
  try {
    await npcs.remove(Number(req.params.pid))
    await core.activity.log({ req, action: 'rust.npcs.profile.delete', detail: { id: Number(req.params.pid) } })
    res.json({ ok: true })
  } catch (err) {
    fail(res, err, 'delete the NPC profile')
  }
}

async function restore(req, res) {
  try {
    const profile = await npcs.restore(Number(req.params.pid))
    await core.activity.log({ req, action: 'rust.npcs.profile.restore', detail: { id: profile.id, name: profile.name } })
    res.json(profile)
  } catch (err) {
    fail(res, err, 'restore the NPC profile')
  }
}

async function push(req, res) {
  try {
    const [result] = await npcSync.tick({ force: req.params.id })
    if (!result) return res.status(404).json({ message: 'No such server, or it is switched off' })
    await core.activity.log({ req, action: 'rust.npcs.push', detail: { server: req.params.id, outcome: result.outcome } })
    res.json(result)
  } catch (err) {
    fail(res, err, 'push the NPC profiles')
  }
}

async function listPlacements(req, res) {
  try {
    res.json(await npcs.listPlacements(req.params.id))
  } catch (err) {
    fail(res, err, 'read the placements')
  }
}

async function addPlacement(req, res) {
  try {
    const placed = await npcs.addPlacement(req.params.id, req.body || {})
    await core.activity.log({ req, action: 'rust.npcs.placement.add', detail: { server: req.params.id, id: placed.id, profile: req.body.profile, position: placed.position } })
    res.status(201).json(placed)
  } catch (err) {
    fail(res, err, 'place the NPCs')
  }
}

async function setPlacement(req, res) {
  try {
    const out = await npcs.setPlacement(req.params.id, req.params.placement, req.body || {})
    await core.activity.log({ req, action: 'rust.npcs.placement.update', detail: { server: req.params.id, id: req.params.placement } })
    res.json(out)
  } catch (err) {
    fail(res, err, 'change the placement')
  }
}

async function removePlacement(req, res) {
  try {
    await npcs.removePlacement(req.params.id, req.params.placement)
    await core.activity.log({ req, action: 'rust.npcs.placement.delete', detail: { server: req.params.id, id: req.params.placement } })
    res.json({ ok: true })
  } catch (err) {
    fail(res, err, 'remove the placement')
  }
}

async function renamePlacement(req, res) {
  try {
    const out = await npcs.renamePlacement(req.params.id, req.params.placement, req.body.to)
    await core.activity.log({ req, action: 'rust.npcs.placement.rename', detail: { server: req.params.id, from: req.params.placement, to: req.body.to } })
    res.json({ id: out.id || req.body.to, previous: req.params.placement })
  } catch (err) {
    fail(res, err, 'rename the placement')
  }
}

async function respawnPlacement(req, res) {
  try {
    const out = await npcs.respawnPlacement(req.params.id, req.params.placement)
    await core.activity.log({ req, action: 'rust.npcs.placement.respawn', detail: { server: req.params.id, id: req.params.placement } })
    res.json({ id: req.params.placement, respawned: Number(out.respawned) || 0 })
  } catch (err) {
    fail(res, err, 'respawn the placement')
  }
}

module.exports = {
  describe,
  create,
  update,
  remove,
  restore,
  push,
  listPlacements,
  addPlacement,
  setPlacement,
  removePlacement,
  renamePlacement,
  respawnPlacement,
}