-- 0082_search_and_grab.up.sql — searching for wants and grabbing releases
-- (Scribe milestone #502, #5521).
--
--   acquisition_settings  one row: whether the schedule takes the best release
--                         by itself, how often a want is searched again, which
--                         quality tiers are taken, and the last pass's report.
--   wants (columns)       when each want was last searched and what came of it.
--   want_candidates       every release the last search found for a want, with
--                         its verdict and the reasons behind it.
--   grabs                 downloads started for wants; at most one live per want.
--   release_blocks        releases never to take again, by infohash.

CREATE TABLE acquisition_settings (
    id                    boolean PRIMARY KEY DEFAULT true CONSTRAINT acquisition_settings_one_row CHECK (id),
    auto_grab             boolean NOT NULL DEFAULT true,
    -- 0 switches the schedule off.
    search_interval_hours integer NOT NULL DEFAULT 24
        CONSTRAINT acquisition_settings_interval_check CHECK (search_interval_hours BETWEEN 0 AND 720),
    -- Lidarr's "Any" profile (note #5527): trash lossy to lossless; unknown off.
    allowed_qualities     text[] NOT NULL DEFAULT ARRAY['lossless_hires', 'lossless', 'lossy_high',
        'lossy_standard', 'lossy_low', 'lossy_poor', 'lossy_trash'],
    last_pass_at          timestamptz,
    last_pass             jsonb NOT NULL DEFAULT '{}',
    updated_at            timestamptz NOT NULL DEFAULT now()
);

INSERT INTO acquisition_settings DEFAULT VALUES;

ALTER TABLE wants
    ADD COLUMN searched_at       timestamptz,
    ADD COLUMN search_outcome    text NOT NULL DEFAULT ''
        CONSTRAINT wants_search_outcome_check CHECK (search_outcome IN ('', 'grabbed', 'waiting', 'nothing', 'error')),
    ADD COLUMN search_considered integer NOT NULL DEFAULT 0,
    ADD COLUMN best_release      text NOT NULL DEFAULT '',
    ADD COLUMN best_verdict      text NOT NULL DEFAULT '',
    ADD COLUMN search_error      text NOT NULL DEFAULT '';

CREATE INDEX wants_search_due_idx ON wants (searched_at NULLS FIRST) WHERE fulfilled_at IS NULL;

CREATE TABLE want_candidates (
    want_id     uuid NOT NULL REFERENCES wants (id) ON DELETE CASCADE,
    -- The infohash, or the name when the source gave none.
    key         text NOT NULL,
    name        text NOT NULL,
    info_hash   text NOT NULL DEFAULT '',
    indexer     text NOT NULL DEFAULT '',
    source      text NOT NULL DEFAULT '',
    size_bytes  bigint NOT NULL DEFAULT 0,
    seeders     integer NOT NULL DEFAULT 0,
    files_count integer NOT NULL DEFAULT 0,
    format      text NOT NULL DEFAULT '',
    quality     text NOT NULL DEFAULT '',
    year        integer NOT NULL DEFAULT 0,
    verdict     text NOT NULL
        CONSTRAINT want_candidates_verdict_check CHECK (verdict IN ('grab', 'review', 'refused', 'rejected', 'blocked')),
    reason      text NOT NULL DEFAULT '',
    reasons     jsonb NOT NULL DEFAULT '[]',
    folded_from text[] NOT NULL DEFAULT '{}',
    -- Position in the search's order, best first.
    rank        integer NOT NULL DEFAULT 0,
    searched_at timestamptz NOT NULL DEFAULT now(),
    PRIMARY KEY (want_id, key)
);

CREATE INDEX want_candidates_info_hash_idx ON want_candidates (info_hash) WHERE info_hash <> '';

CREATE TABLE grabs (
    id         uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    want_id    uuid REFERENCES wants (id) ON DELETE SET NULL,
    info_hash  text NOT NULL DEFAULT '',
    name       text NOT NULL,
    key        text NOT NULL,
    indexer    text NOT NULL DEFAULT '',
    source     text NOT NULL DEFAULT '',
    -- The acquisition_services row of the download client it went to.
    client     text NOT NULL,
    save_path  text NOT NULL,
    quality    text NOT NULL DEFAULT '',
    origin     text NOT NULL CONSTRAINT grabs_origin_check CHECK (origin IN ('schedule', 'operator')),
    forced     boolean NOT NULL DEFAULT false,
    grabbed_by uuid REFERENCES users (id) ON DELETE SET NULL,
    grabbed_at timestamptz NOT NULL DEFAULT now(),
    ended_at   timestamptz,
    end_reason text NOT NULL DEFAULT ''
        CONSTRAINT grabs_end_reason_check CHECK (end_reason IN ('', 'superseded')),
    end_detail text NOT NULL DEFAULT ''
);

-- One live grab per want; the service decides which, this is the backstop.
CREATE UNIQUE INDEX grabs_one_live_per_want ON grabs (want_id) WHERE ended_at IS NULL AND want_id IS NOT NULL;
CREATE INDEX grabs_info_hash_idx ON grabs (info_hash) WHERE info_hash <> '';

CREATE TABLE release_blocks (
    info_hash  text PRIMARY KEY,
    name       text NOT NULL DEFAULT '',
    -- operator: "never this one"; files: its .torrent held the wrong thing.
    reason     text NOT NULL CONSTRAINT release_blocks_reason_check CHECK (reason IN ('operator', 'files')),
    detail     text NOT NULL DEFAULT '',
    want_id    uuid REFERENCES wants (id) ON DELETE SET NULL,
    blocked_by uuid REFERENCES users (id) ON DELETE SET NULL,
    blocked_at timestamptz NOT NULL DEFAULT now()
);