CREATE TABLE backup_targets (
    id       TEXT PRIMARY KEY,
    name     TEXT NOT NULL,
    kind     TEXT NOT NULL CHECK (kind IN ('smb', 'ftp')),
    host     TEXT NOT NULL,
    port     INTEGER,
    share    TEXT NOT NULL DEFAULT '',
    path     TEXT NOT NULL DEFAULT '',
    username TEXT NOT NULL DEFAULT '',
    password TEXT NOT NULL DEFAULT '',
    tls      INTEGER NOT NULL DEFAULT 0
);

CREATE TABLE backup_strategies (
    id         TEXT PRIMARY KEY,
    name       TEXT NOT NULL,
    source     TEXT NOT NULL,
    schedule   TEXT NOT NULL,
    target_id  TEXT NOT NULL REFERENCES backup_targets(id),
    retention  INTEGER NOT NULL,
    passphrase TEXT,
    enabled    INTEGER NOT NULL DEFAULT 1
);

CREATE TABLE backup_records (
    id          TEXT PRIMARY KEY,
    strategy_id TEXT NOT NULL REFERENCES backup_strategies(id) ON DELETE CASCADE,
    filename    TEXT NOT NULL,
    size_bytes  INTEGER NOT NULL,
    sha256      TEXT NOT NULL,
    created_at  TEXT NOT NULL
);
CREATE INDEX backup_records_strategy ON backup_records(strategy_id, created_at DESC);