-- +goose Up
CREATE TABLE download (
    id              INTEGER PRIMARY KEY AUTOINCREMENT,
    source_type     TEXT    NOT NULL,                       -- magnet | torrent | url
    source_ref      TEXT    NOT NULL,
    context         TEXT    NOT NULL DEFAULT '',
    infohash        TEXT,
    idempotency_key TEXT,
    state           TEXT    NOT NULL,
    error_code      TEXT,
    error_msg       TEXT,
    created_at      TEXT    NOT NULL DEFAULT (datetime('now')),
    updated_at      TEXT    NOT NULL DEFAULT (datetime('now'))
);

CREATE UNIQUE INDEX idx_download_idempotency_key
    ON download (idempotency_key)
    WHERE idempotency_key IS NOT NULL;

CREATE INDEX idx_download_state ON download (state);

CREATE TABLE recognition (
    id             INTEGER PRIMARY KEY AUTOINCREMENT,
    download_id    INTEGER NOT NULL REFERENCES download (id) ON DELETE CASCADE,
    attempt_no     INTEGER NOT NULL DEFAULT 1,
    is_current     INTEGER NOT NULL DEFAULT 1,             -- 0/1
    media_type     TEXT,                                   -- movie | series
    title          TEXT,
    original_title TEXT,
    year           INTEGER,
    provider       TEXT,                                   -- tmdb | tvdb | none
    provider_id    TEXT,
    confidence     REAL,
    reasons        TEXT    NOT NULL DEFAULT '[]',           -- JSON: причины «не авто»
    raw_llm        TEXT,
    created_at     TEXT    NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX idx_recognition_download ON recognition (download_id);

CREATE TABLE hint (
    id          INTEGER PRIMARY KEY AUTOINCREMENT,
    download_id INTEGER NOT NULL REFERENCES download (id) ON DELETE CASCADE,
    text        TEXT    NOT NULL,
    created_at  TEXT    NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX idx_hint_download ON hint (download_id);

CREATE TABLE override (
    id          INTEGER PRIMARY KEY AUTOINCREMENT,
    download_id INTEGER NOT NULL REFERENCES download (id) ON DELETE CASCADE,
    field       TEXT    NOT NULL,
    value       TEXT    NOT NULL,
    created_at  TEXT    NOT NULL DEFAULT (datetime('now')),
    UNIQUE (download_id, field)
);

CREATE TABLE metadata_candidate (
    id             INTEGER PRIMARY KEY AUTOINCREMENT,
    recognition_id INTEGER NOT NULL REFERENCES recognition (id) ON DELETE CASCADE,
    provider       TEXT    NOT NULL,
    provider_id    TEXT    NOT NULL,
    title          TEXT,
    year           INTEGER,
    chosen         INTEGER NOT NULL DEFAULT 0,             -- 0/1
    created_at     TEXT    NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX idx_candidate_recognition ON metadata_candidate (recognition_id);

CREATE TABLE file_link (
    id             INTEGER PRIMARY KEY AUTOINCREMENT,
    download_id    INTEGER NOT NULL REFERENCES download (id) ON DELETE CASCADE,
    apply_batch_id TEXT    NOT NULL,
    src_path       TEXT    NOT NULL,
    dst_path       TEXT    NOT NULL,
    kind           TEXT    NOT NULL,                        -- video | subtitle | ...
    status         TEXT    NOT NULL,
    created_at     TEXT    NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX idx_file_link_download ON file_link (download_id);
CREATE INDEX idx_file_link_batch ON file_link (apply_batch_id);

-- +goose Down
DROP TABLE file_link;
DROP TABLE metadata_candidate;
DROP TABLE override;
DROP TABLE hint;
DROP TABLE recognition;
DROP TABLE download;