// ── The chat-title conditions (PLAN_REDESIGNS §5, D172–D175, D209) ─────────
//
// Four things here, each a mistake that would look right in review:
//
//   • **a best is not a sum.** The two distance columns take GREATEST at ingest;
//     adding two intervals' maxima would give a kill nobody made.
//   • **"NPC kills" subtracts in SIGNED arithmetic.** `npc_kills` is unsigned,
//     and a row counted before `animal_kills` existed must not wrap to 4 billion.
//   • **a rename reaches a rule with no text.** The rule's own text wins, then
//     the admin's category title, then the default (§4.6's three layers).
//   • **a category's title is never a rule's text by accident.** An empty text is
//     "use the category's", and a typed title made of markup is still refused.

const test = require('node:test')
const assert = require('node:assert')

const { fakeCtx } = require('./_fakes')

/** Installs a core whose `db.query` records every statement and answers `rows`. */
function withRecorder(rows = []) {
  const statements = []
  const ctx = fakeCtx({
    db: {
      query: (sql, params = []) => {
        statements.push({ sql, params })
        return Promise.resolve(typeof rows === 'function' ? rows(sql, params) : rows)
      },
      pool: {},
    },
  })
  require('../core')._reset()
  require('../core').init(ctx)
  return {
    statements,
    touching: (table) => statements.filter((s) => s.sql.includes(table)),
    ctx,
  }
}

withRecorder()

const titles = require('../model/titles/titles')
const lists = require('../model/titles/lists')

const frame = (over = {}) => ({ type: 'event', t: 1, serverId: 'main', wipeId: 'w1', ...over })
const item = (kind, over = {}) => ({ id: 1, t: 1, kind, frame: frame({ kind, ...over }) })

// ── The categories ────────────────────────────────────────────────────────

test('twenty-three categories carry a default title, and playtime carries none (D172)', () => {
  assert.strictEqual(titles.CATEGORY_IDS.length, 23)
  assert.ok(!titles.CATEGORY_IDS.includes('playtime'))
  assert.strictEqual(titles.STATS.playtime.title, null)
  assert.strictEqual(titles.STATS.animalkills.title, 'Beastbane')
  assert.strictEqual(titles.STATS.missions.title, 'Wayfarer')

  // Every id fits the column a rule stores it in.
  for (const id of Object.keys(titles.STATS)) assert.ok(id.length <= 16, id)

  // Every list a category names exists, and is not empty.
  for (const { source } of Object.values(titles.STATS)) {
    const name = source.weapons || source.gathered
    if (name) assert.ok(Array.isArray(lists[name]) && lists[name].length, name)
  }
})

test('"NPC kills" is human NPCs: every NPC kill less the animals (D209)', () => {
  assert.deepStrictEqual(titles.STATS.npckills.source, { diff: ['npc_kills', 'animal_kills'] })
})

test('every blade is also a melee weapon (§5.3)', () => {
  for (const blade of lists.blade) assert.ok(lists.melee.includes(blade), blade)
})

// ── Rules and their text ──────────────────────────────────────────────────

test('a rule may leave its text empty when its category has a title, and not for playtime (D175)', () => {
  const ok = titles.validateSettings({ rules: [{ stat: 'animalkills', topN: 1, text: '', color: '#00ff00' }] })
  assert.strictEqual(ok.ok, true)
  assert.strictEqual(ok.value.rules[0].text, '')

  const playtime = titles.validateSettings({ rules: [{ stat: 'playtime', topN: 1, text: '', color: '#00ff00' }] })
  assert.strictEqual(playtime.ok, false)
  assert.ok(playtime.errors.some((e) => /rule 1: the title needs some text/.test(e)))
})

test('a typed title made only of markup is refused, even where empty would be allowed (reading 3)', () => {
  const bad = titles.validateSettings({ rules: [{ stat: 'kills', topN: 1, text: '[]<>', color: '#ff0000' }] })
  assert.strictEqual(bad.ok, false)
  assert.ok(bad.errors.some((e) => /the title needs some text/.test(e)))
})

test('a rule’s text wins, then the admin’s category title, then the default (§4.6)', () => {
  const rules = [
    { stat: 'kills', topN: 1, text: 'Top Gun', color: '#ff0000' },
    { stat: 'animalkills', topN: 1, text: '', color: '#00ff00' },
    { stat: 'headshots', topN: 1, text: '', color: '#0000ff' },
  ]
  const resolved = titles.resolveRules(rules, { animalkills: 'Hunter', kills: 'Ignored' })
  assert.deepStrictEqual(resolved.map((r) => r.text), ['Top Gun', 'Hunter', 'Crownbreaker'])
})

test('a playtime rule with no text shows nothing rather than an empty chip', () => {
  const resolved = titles.resolveRules([{ stat: 'playtime', topN: 1, text: '', color: '#ffffff' }], {})
  assert.deepStrictEqual(resolved, [])
})

test('a category title is checked like a rule’s, and empty is the Reset', () => {
  assert.deepStrictEqual(titles.validateCategory('animalkills', ' [Hunter] '), { ok: true, text: 'Hunter' })
  assert.deepStrictEqual(titles.validateCategory('animalkills', ''), { ok: true, text: '' })
  assert.strictEqual(titles.validateCategory('animalkills', '<>').ok, false)
  assert.strictEqual(titles.validateCategory('animalkills', 'x'.repeat(25)).ok, false)
  assert.strictEqual(titles.validateCategory('playtime', 'Regular').ok, false, 'playtime has no category title')
  assert.strictEqual(titles.validateCategory('deaths', 'X').ok, false)
})

// ── The ingest ────────────────────────────────────────────────────────────

test('a tally’s title counts are added, and its two distances kept as a best', async () => {
  const rec = withRecorder()
  const { apply } = require('../ingest')

  await apply(
    'main',
    item('player.tally', {
      steamId: 'p1',
      animalKills: 2,
      headshots: 1,
      bestPvpM: 187.46,
      bestPveM: 42.1,
      crafted: { attire: 3, weapon: 1, tool: 9 },
      built: 12,
      missions: 1,
      weaponKills: { 'bow_hunting.entity': 2, 'machete.weapon': 1 },
    }),
  )

  const titled = rec.touching('rust_player_wipe_stats').find((s) => s.sql.includes('animal_kills'))
  assert.ok(titled, 'one statement for the title counts')
  assert.match(titled.sql, /animal_kills = animal_kills \+ VALUES\(animal_kills\)/)
  assert.match(titled.sql, /best_pvp_m = GREATEST\(best_pvp_m, VALUES\(best_pvp_m\)\)/)
  assert.match(titled.sql, /best_pve_m = GREATEST\(best_pve_m, VALUES\(best_pve_m\)\)/)
  assert.doesNotMatch(titled.sql, /best_pvp_m = best_pvp_m \+/)

  const cols = titled.sql.match(/\(server_id, wipe_id, steam_id, ([^)]+), last_seen\)/)[1].split(', ')
  const value = (col) => titled.params[3 + cols.indexOf(col)]
  assert.strictEqual(value('animal_kills'), 2)
  assert.strictEqual(value('crafted_attire'), 3)
  assert.strictEqual(value('crafted_weapons'), 1)
  assert.strictEqual(value('built'), 12)
  assert.strictEqual(value('missions'), 1)
  assert.strictEqual(value('best_pvp_m'), 187.5)
  assert.strictEqual(value('rockets'), 0)

  const weapons = rec.touching('rust_weapon_kills')
  assert.deepStrictEqual(
    weapons.map((w) => [w.params[3], w.params[4]]),
    [['bow_hunting.entity', 2], ['machete.weapon', 1]],
  )
  assert.match(weapons[0].sql, /kills = kills \+ VALUES\(kills\)/)
})

test('an older plugin’s tally writes no title statement at all', async () => {
  const rec = withRecorder()
  const { apply } = require('../ingest')

  await apply('main', item('player.tally', { steamId: 'p1', npcKills: 1 }))

  assert.strictEqual(rec.touching('rust_player_wipe_stats').filter((s) => s.sql.includes('animal_kills')).length, 0)
  assert.strictEqual(rec.touching('rust_weapon_kills').length, 0)
})

// ── The standings ─────────────────────────────────────────────────────────

test('a category’s standings read from the right place, in the leaderboard’s order', async () => {
  const rec = withRecorder([])
  const db = require('../model/titles/titles.db')
  const at = { serverId: 'main', wipeId: 'w1', lists, limit: 3 }

  await db.standings({ ...at, source: titles.STATS.npckills.source })
  const human = rec.statements.at(-1)
  assert.match(human.sql, /CAST\(s\.npc_kills AS SIGNED\) - CAST\(s\.animal_kills AS SIGNED\)/)
  assert.match(human.sql, /ORDER BY value DESC, MAX\(s\.last_seen\) DESC/)

  await db.standings({ ...at, source: titles.STATS.pvpdistance.source })
  assert.match(rec.statements.at(-1).sql, /MAX\(s\.best_pvp_m\) AS value/)

  await db.standings({ ...at, source: titles.STATS.bowkills.source })
  const bow = rec.statements.at(-1)
  assert.match(bow.sql, /FROM rust_weapon_kills t/)
  assert.deepStrictEqual(bow.params.slice(2, 2 + lists.bow.length), lists.bow)
  assert.strictEqual(bow.params.at(-1), 3)

  await db.standings({ ...at, source: titles.STATS.ore.source })
  assert.match(rec.statements.at(-1).sql, /FROM rust_gather_totals t/)

  const before = rec.statements.length
  assert.deepStrictEqual(await db.standings({ ...at, source: { weapons: 'nothing' } }), [])
  assert.strictEqual(rec.statements.length, before, 'an empty list asks nothing')
})

test('a rename reaches every server’s next answer: the memo is forgotten fleet-wide', async () => {
  let override = null
  withRecorder((sql) => {
    if (sql.includes('FROM rust_title_categories')) return override ? [{ stat: 'animalkills', text: override }] : []
    if (sql.includes('FROM rust_title_rules')) return [{ stat: 'animalkills', topN: 1, text: '', color: '#00ff00' }]
    if (sql.includes('title_mode')) return [{ mode: 'first', max: 2 }]
    if (sql.includes('SUM(s.animal_kills)')) return [{ steamId: '7', value: '4' }]
    return []
  })
  const model = require('../model/titles/titles.model')
  model.forget()

  const first = await model.heldFor('main', { wipeId: 'w1', now: 1000 })
  assert.deepStrictEqual(first.get('7'), [{ text: 'Beastbane', color: '#00ff00' }])

  override = 'Hunter'
  await model.setCategory('animalkills', 'Hunter', 1)
  const after = await model.heldFor('main', { wipeId: 'w1', now: 1001 })
  assert.deepStrictEqual(after.get('7'), [{ text: 'Hunter', color: '#00ff00' }])
})