CREATE TABLE hosts (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    host_id TEXT NOT NULL UNIQUE,
    base_url TEXT NOT NULL,
    host_version TEXT NOT NULL,
    capability_probe_json TEXT NOT NULL DEFAULT '{}',
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE packs (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    pack_id TEXT NOT NULL UNIQUE,
    version TEXT NOT NULL,
    checksum TEXT NOT NULL,
    installed_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE providers (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    pack_id INTEGER NOT NULL,
    provider_id TEXT NOT NULL,
    display_name TEXT NOT NULL,
    base_url TEXT NOT NULL,
    platform TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_providers_pack
        FOREIGN KEY (pack_id)
        REFERENCES packs(id)
        ON DELETE CASCADE,
    CONSTRAINT uq_providers_pack_provider
        UNIQUE (pack_id, provider_id)
);