brackt/app/services
Chris Parsons 8c3663e01b
Add PDC World Darts Championship simulator with Elo-based bracket (#248)
Fixes #123

* Add PDC World Darts Championship simulator (128-player bracket)

- New DartsSimulator: 128-player single-elimination, 7 rounds with
  PDC-accurate best-of-sets formats (bo3/bo5/bo5/bo7/bo7/bo11/bo13).
  ELO_DIVISOR=500 via set-level Bernoulli model. Two simulation paths:
  Path A (bracket drawn) simulates from actual DB matches; Path B
  (pre-bracket) seeds top 32 by world ranking in fixed positions and
  randomly draws the remaining 96 per simulation run (50,000 iterations).
- darts_bracket added to simulatorTypeEnum and simulator registry.
- world_ranking nullable integer column added to participant_expected_values
  (migration 0067); batchSaveSourceElos now accepts and persists it.
- Admin route /admin/sports-seasons/:id/darts-elo: bulk import with format
  "Player Name, 2099, 1" (name, Elo, optional world ranking), fuzzy name
  matching, auto-runs simulation and updates EV/snapshots on save.
- DARTS_128 bracket template added (scoring starts at Quarterfinals).
- 30 unit tests: math helpers, bracket seeding structure, Path A/B integration.

https://claude.ai/code/session_01WZ6FjMmC2eBeZ1564M9Ruz

* Review fixes: pre-compute hot-loop invariants, import normalizeName

- Pre-compute seededSlots and getSeededMatchOrder(32) before the 50k
  simulation loop — was being recomputed every iteration
- Pad unseeded pool to 96 once before the loop instead of inside it
- Inline bracket-building in the hot loop using pre-computed seededSlots;
  removes the per-iteration call to buildR1Bracket/getSeededMatchOrder
- Remove dead SEEDED_R1_PAIRS constant (was never referenced)
- Import normalizeName from ~/lib/fuzzy-match instead of redefining it locally

https://claude.ai/code/session_01WZ6FjMmC2eBeZ1564M9Ruz

* Fix lint failures: unused vars, eqeqeq, toSorted

- Remove unused seededSet/unseededSet variables in test
- Replace != null with !== null && !== undefined (eqeqeq rule)
- Replace .sort() with .toSorted() in simulator and route (unicorn/no-array-sort)

https://claude.ai/code/session_01WZ6FjMmC2eBeZ1564M9Ruz

* Fix TS2552: restore seededSet declaration removed during lint fix

https://claude.ai/code/session_01WZ6FjMmC2eBeZ1564M9Ruz

---------

Co-authored-by: Claude <noreply@anthropic.com>
2026-03-31 15:37:28 -07:00
..
__tests__ Show tied ranks with T prefix across standings and Discord (#239) 2026-03-27 20:45:15 -07:00
simulations Add PDC World Darts Championship simulator with Elo-based bracket (#248) 2026-03-31 15:37:28 -07:00
standings-sync Add WNBA playoff simulator with SRS-based Elo ratings, fixes #125 (#231) 2026-03-26 00:34:51 -07:00
bracket-simulator.ts Replace console.* with structured logger, fix no-inferrable-types (closes #98) (#199) 2026-03-21 13:41:39 -07:00
discord.ts Show tied ranks with T prefix across standings and Discord (#239) 2026-03-27 20:45:15 -07:00
ev-calculator.ts Replace console.* with structured logger, fix no-inferrable-types (closes #98) (#199) 2026-03-21 13:41:39 -07:00
icm-calculator.ts Replace console.* with structured logger, fix no-inferrable-types (closes #98) (#199) 2026-03-21 13:41:39 -07:00
probability-engine.ts feat: implement Expected Value System with ICM probability calculator 2025-11-17 22:19:46 -08:00
probability-updater.ts Replace console.* with structured logger, fix no-inferrable-types (closes #98) (#199) 2026-03-21 13:41:39 -07:00