-- ═══════════════════════════════════════════════════════════════
-- 030: Two-level taxonomy for achievements
--
-- The existing `category` field stays for backward compatibility, but
-- the UI now groups achievements by `group_slug` (six top-level
-- buckets) and orders them by `(group_slug, sort_order)`. Inside a
-- bucket related achievements with escalating thresholds share a
-- `track` (e.g. tests_10/50/100 → track='tests') and a `tier`
-- (1..5). Singletons leave tier NULL.
--
-- New groups:
--   onboarding   — first steps in the app
--   volume       — quantity (tests, assignments, XP totals)
--   mastery      — quality: streaks/levels were folded into consistency
--                  and mastery respectively; pure mastery = score/speed
--                  /perfect/course completion
--   consistency  — streaks, daily goals, plan adherence
--   exploration  — feature discovery: lab, biochem, red book
--   social       — class membership, leaderboard (filled in Phase 3)
--
-- Sort order convention: groups are spaced by 100s (onboarding=100,
-- volume=200, ...), achievements inside use offsets so we can insert
-- new ones later without renumbering.
-- ═══════════════════════════════════════════════════════════════

ALTER TABLE achievements ADD COLUMN group_slug TEXT;
ALTER TABLE achievements ADD COLUMN track      TEXT;
ALTER TABLE achievements ADD COLUMN tier       INTEGER;
ALTER TABLE achievements ADD COLUMN sort_order INTEGER NOT NULL DEFAULT 0;

CREATE INDEX IF NOT EXISTS idx_ach_group_sort ON achievements(group_slug, sort_order);

-- ── onboarding (group=100) ─────────────────────────────────────
UPDATE achievements SET group_slug='onboarding', track='first_test',    tier=1, sort_order=110 WHERE slug='first_test';
UPDATE achievements SET group_slug='onboarding', track='first_perfect', tier=1, sort_order=120 WHERE slug='first_perfect';
UPDATE achievements SET group_slug='onboarding', track='first_class',   tier=1, sort_order=130 WHERE slug='first_class';

-- ── volume (group=200): quantity of things done ────────────────
-- track=tests (10/50/100)
UPDATE achievements SET group_slug='volume', track='tests', tier=1, sort_order=210 WHERE slug='tests_10';
UPDATE achievements SET group_slug='volume', track='tests', tier=2, sort_order=220 WHERE slug='tests_50';
UPDATE achievements SET group_slug='volume', track='tests', tier=3, sort_order=230 WHERE slug='tests_100';
-- track=assign (first/10)
UPDATE achievements SET group_slug='volume', track='assign', tier=1, sort_order=240 WHERE slug='assign_first';
UPDATE achievements SET group_slug='volume', track='assign', tier=2, sort_order=250 WHERE slug='assign_10';
-- track=xp_total (1000/5000/10000)
UPDATE achievements SET group_slug='volume', track='xp_total', tier=1, sort_order=260 WHERE slug='xp_1000';
UPDATE achievements SET group_slug='volume', track='xp_total', tier=2, sort_order=270 WHERE slug='xp_5000';
UPDATE achievements SET group_slug='volume', track='xp_total', tier=3, sort_order=280 WHERE slug='xp_10000';

-- ── mastery (group=300): quality / completion ──────────────────
-- track=level (3/5/10/20)
UPDATE achievements SET group_slug='mastery', track='level', tier=1, sort_order=310 WHERE slug='level_3';
UPDATE achievements SET group_slug='mastery', track='level', tier=2, sort_order=320 WHERE slug='level_5';
UPDATE achievements SET group_slug='mastery', track='level', tier=3, sort_order=330 WHERE slug='level_10';
UPDATE achievements SET group_slug='mastery', track='level', tier=4, sort_order=340 WHERE slug='level_20';
-- track=score (90% streak, perfect, speed)
UPDATE achievements SET group_slug='mastery', track='score',     tier=1, sort_order=350 WHERE slug='score_90';
UPDATE achievements SET group_slug='mastery', track='speed',     tier=1, sort_order=360 WHERE slug='speed_demon';
-- track=theory_progress (first/10/course)
UPDATE achievements SET group_slug='mastery', track='theory', tier=1, sort_order=370 WHERE slug='theory_first';
UPDATE achievements SET group_slug='mastery', track='theory', tier=2, sort_order=380 WHERE slug='theory_10';
UPDATE achievements SET group_slug='mastery', track='theory', tier=3, sort_order=390 WHERE slug='theory_course';

-- ── consistency (group=400): streaks, plan, goals ──────────────
UPDATE achievements SET group_slug='consistency', track='streak', tier=1, sort_order=410 WHERE slug='streak_3';
UPDATE achievements SET group_slug='consistency', track='streak', tier=2, sort_order=420 WHERE slug='streak_7';
UPDATE achievements SET group_slug='consistency', track='streak', tier=3, sort_order=430 WHERE slug='streak_30';

-- ── exploration (group=500): feature discovery ─────────────────
-- track=lab_experiments (first/5/20/50)
UPDATE achievements SET group_slug='exploration', track='lab',           tier=1, sort_order=510 WHERE slug='lab_first';
UPDATE achievements SET group_slug='exploration', track='lab',           tier=2, sort_order=520 WHERE slug='lab_5';
UPDATE achievements SET group_slug='exploration', track='lab',           tier=3, sort_order=530 WHERE slug='lab_20';
UPDATE achievements SET group_slug='exploration', track='lab',           tier=4, sort_order=540 WHERE slug='lab_50';
-- track=lab_reactions (10/30)
UPDATE achievements SET group_slug='exploration', track='lab_reactions', tier=1, sort_order=550 WHERE slug='lab_reactions_10';
UPDATE achievements SET group_slug='exploration', track='lab_reactions', tier=2, sort_order=560 WHERE slug='lab_reactions_30';
-- track=red_book (first/10/25/50/all)
UPDATE achievements SET group_slug='exploration', track='red_book',      tier=1, sort_order=570 WHERE slug='rb_first';
UPDATE achievements SET group_slug='exploration', track='red_book',      tier=2, sort_order=580 WHERE slug='rb_10';
UPDATE achievements SET group_slug='exploration', track='red_book',      tier=3, sort_order=590 WHERE slug='rb_25';
UPDATE achievements SET group_slug='exploration', track='red_book',      tier=4, sort_order=600 WHERE slug='rb_50';
UPDATE achievements SET group_slug='exploration', track='red_book',      tier=5, sort_order=610 WHERE slug='rb_all_cr';
-- track=red_book_quests (first/5)
UPDATE achievements SET group_slug='exploration', track='red_book_quest',tier=1, sort_order=620 WHERE slug='rb_quest_first';
UPDATE achievements SET group_slug='exploration', track='red_book_quest',tier=2, sort_order=630 WHERE slug='rb_quest_5';
-- singletons
UPDATE achievements SET group_slug='exploration', track='red_book_obs',  tier=1, sort_order=640 WHERE slug='rb_sighting';

-- ── social (group=600): empty for now, filled in Phase 3 ───────
-- (no UPDATEs here — placeholder for class/leaderboard/live-quiz tracks)