PRAGMA foreign_keys = ON;

-- New master schema, version 3. Not an in-place migration.
CREATE TABLE IF NOT EXISTS meta (
    key TEXT PRIMARY KEY,
    value TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS sources (
    name TEXT PRIMARY KEY,
    revision TEXT NOT NULL DEFAULT '',
    indexed INTEGER NOT NULL DEFAULT 0 CHECK(indexed IN (0,1)),
    documents INTEGER NOT NULL DEFAULT 0 CHECK(documents >= 0),
    last_sync TEXT,
    last_import TEXT,
    import_status TEXT NOT NULL DEFAULT 'pending'
        CHECK(import_status IN ('pending','success','unsupported','failed')),
    import_errors INTEGER NOT NULL DEFAULT 0 CHECK(import_errors >= 0)
);
CREATE INDEX IF NOT EXISTS idx_sources_status ON sources(import_status);

CREATE TABLE IF NOT EXISTS vulnerabilities (
    id TEXT PRIMARY KEY,
    published TEXT,
    modified TEXT,
    state TEXT,
    summary TEXT
);
CREATE INDEX IF NOT EXISTS idx_vulnerabilities_modified ON vulnerabilities(modified);

CREATE TABLE IF NOT EXISTS aliases (
    alias TEXT NOT NULL,
    vulnerability_id TEXT NOT NULL REFERENCES vulnerabilities(id) ON DELETE CASCADE,
    PRIMARY KEY(alias,vulnerability_id)
);
CREATE INDEX IF NOT EXISTS idx_aliases_vuln ON aliases(vulnerability_id);

CREATE TABLE IF NOT EXISTS affected_packages (
    id TEXT PRIMARY KEY,
    vulnerability_id TEXT NOT NULL REFERENCES vulnerabilities(id) ON DELETE CASCADE,
    ecosystem TEXT,
    package_name TEXT,
    ranges_json TEXT NOT NULL,
    versions_json TEXT NOT NULL,
    source TEXT NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_affected_vuln ON affected_packages(vulnerability_id);
CREATE INDEX IF NOT EXISTS idx_affected_package ON affected_packages(ecosystem,package_name);

-- NVD condition tree: match semantics are not flattened.
CREATE TABLE IF NOT EXISTS cpe_nodes (
    id TEXT PRIMARY KEY,
    vulnerability_id TEXT NOT NULL REFERENCES vulnerabilities(id) ON DELETE CASCADE,
    parent_id TEXT REFERENCES cpe_nodes(id) DEFERRABLE INITIALLY DEFERRED,
    operator TEXT NOT NULL CHECK(operator IN ('AND','OR')),
    negate INTEGER NOT NULL DEFAULT 0 CHECK(negate IN (0,1)),
    source TEXT NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_cpe_nodes_vuln ON cpe_nodes(vulnerability_id);
CREATE INDEX IF NOT EXISTS idx_cpe_nodes_parent ON cpe_nodes(parent_id);

CREATE TABLE IF NOT EXISTS cpe_matches (
    id TEXT PRIMARY KEY,
    vulnerability_id TEXT NOT NULL REFERENCES vulnerabilities(id) ON DELETE CASCADE,
    node_id TEXT REFERENCES cpe_nodes(id) DEFERRABLE INITIALLY DEFERRED,
    criteria TEXT,
    vulnerable INTEGER CHECK(vulnerable IN (0,1)),
    version_start_including TEXT,
    version_start_excluding TEXT,
    version_end_including TEXT,
    version_end_excluding TEXT,
    source TEXT NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_cpe_vuln ON cpe_matches(vulnerability_id);
CREATE INDEX IF NOT EXISTS idx_cpe_matches_node ON cpe_matches(node_id);
CREATE INDEX IF NOT EXISTS idx_cpe_matches_criteria ON cpe_matches(criteria);

-- Product IDs and remediation semantics stay intact.
CREATE TABLE IF NOT EXISTS redhat_advisories (
    id TEXT PRIMARY KEY,
    title TEXT,
    initial_release_date TEXT,
    current_release_date TEXT,
    product_tree_json TEXT NOT NULL
);
CREATE TABLE IF NOT EXISTS redhat_advisory_cves (
    id TEXT PRIMARY KEY,
    advisory_id TEXT NOT NULL REFERENCES redhat_advisories(id) ON DELETE CASCADE,
    cve_id TEXT NOT NULL REFERENCES vulnerabilities(id) ON DELETE CASCADE,
    product_status_json TEXT NOT NULL,
    remediations_json TEXT NOT NULL,
    UNIQUE(advisory_id,cve_id)
);
CREATE INDEX IF NOT EXISTS idx_redhat_advisory_cves_cve ON redhat_advisory_cves(cve_id);
CREATE INDEX IF NOT EXISTS idx_redhat_advisory_cves_advisory ON redhat_advisory_cves(advisory_id);