CREATE TABLE IF NOT EXISTS entries (
    id           INTEGER PRIMARY KEY AUTOINCREMENT,
    event_id     INTEGER NOT NULL REFERENCES events(id),
    category_id  INTEGER NOT NULL REFERENCES event_categories(id),
    team_id      INTEGER NOT NULL REFERENCES teams(id),
    athlete_id   INTEGER REFERENCES athletes(id),
    member_names TEXT,
    bib          TEXT,
    seed         TEXT,
    status       TEXT NOT NULL DEFAULT 'registered'
                 CHECK (status IN ('registered', 'scratched', 'dq', 'dns')),
    remark       TEXT,
    created_at   TEXT NOT NULL DEFAULT (datetime('now')),
    UNIQUE (category_id, team_id, athlete_id)
);

CREATE INDEX IF NOT EXISTS idx_entries_event_id ON entries(event_id);
CREATE INDEX IF NOT EXISTS idx_entries_team_id ON entries(team_id);
CREATE INDEX IF NOT EXISTS idx_entries_athlete_id ON entries(athlete_id);
CREATE INDEX IF NOT EXISTS idx_entries_category_id ON entries(category_id);
-- athlete_id 为 NULL 时 UNIQUE 视为互不相等，团体项目的重复报名靠这条部分索引兜住。
CREATE UNIQUE INDEX IF NOT EXISTS idx_entries_team_unique
    ON entries(category_id, team_id) WHERE athlete_id IS NULL;

CREATE TABLE IF NOT EXISTS results (
    id              INTEGER PRIMARY KEY AUTOINCREMENT,
    event_id        INTEGER NOT NULL REFERENCES events(id),
    entry_id        INTEGER NOT NULL UNIQUE REFERENCES entries(id),
    rank            INTEGER CHECK (rank IS NULL OR rank >= 1),
    result_text     TEXT,
    result_value    REAL,
    unit            TEXT,
    is_tie          INTEGER NOT NULL DEFAULT 0 CHECK (is_tie IN (0, 1)),
    points_override REAL,
    status          TEXT NOT NULL DEFAULT 'ok'
                    CHECK (status IN ('ok', 'dq', 'dns', 'dnf', 'withdrawn')),
    state           TEXT NOT NULL DEFAULT 'draft' CHECK (state IN ('draft', 'published')),
    -- recorded_by / verified_by 指向系统库 users，跨库不能建外键。
    recorded_by     INTEGER,
    recorded_at     TEXT,
    verified_by     INTEGER,
    verified_at     TEXT,
    note            TEXT,
    created_at      TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at      TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_results_event_state ON results(event_id, state);
CREATE INDEX IF NOT EXISTS idx_results_event_rank ON results(event_id, rank);