-- Restart-safe player-scoped assignment projections. The signed manifest and
-- join authorisation are persisted only after the allocator/manifest gate has
-- succeeded; clients still receive them only through an authenticated owner
-- read.

CREATE TABLE assignments (
    match_id TEXT NOT NULL,
    player_id TEXT NOT NULL,
    allocation_id TEXT NOT NULL,
    server_id TEXT NOT NULL,
    slot INTEGER NOT NULL CHECK (slot BETWEEN 0 AND 5),
    region TEXT NOT NULL CHECK (region IN ('EU', 'NA')),
    client_build TEXT NOT NULL,
    protocol_version INTEGER NOT NULL CHECK (protocol_version > 0),
    transport TEXT NOT NULL CHECK (transport IN ('enet', 'steam_sdr')),
    endpoint TEXT NOT NULL,
    join_authorisation TEXT NOT NULL,
    manifest_digest BYTEA NOT NULL,
    expires_at TIMESTAMPTZ NOT NULL,
    revision BIGINT NOT NULL DEFAULT 0 CHECK (revision >= 0),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (match_id, player_id),
    FOREIGN KEY (match_id, player_id) REFERENCES match_participants(match_id, player_id),
    UNIQUE (match_id, slot)
);

CREATE INDEX assignments_player_expiry
    ON assignments (player_id, expires_at);