-- Spark IM V3 initial schema. Message body lives in MySQL; dialog list lives in Redis.

CREATE TABLE IF NOT EXISTS conversations (
    id            BIGINT PRIMARY KEY,
    type          TINYINT NOT NULL,
    last_msg_id   BIGINT NOT NULL DEFAULT 0,
    last_msg_at   DATETIME(3) NOT NULL,
    created_at    DATETIME(3) NOT NULL
);

CREATE TABLE IF NOT EXISTS p2p_conversations (
    user_small        BIGINT NOT NULL,
    user_big          BIGINT NOT NULL,
    conversation_id   BIGINT NOT NULL,
    PRIMARY KEY (user_small, user_big),
    UNIQUE KEY uk_conversation (conversation_id)
);

CREATE TABLE IF NOT EXISTS conversation_members (
    conversation_id     BIGINT NOT NULL,
    user_id             BIGINT NOT NULL,
    last_read_msg_id    BIGINT NOT NULL DEFAULT 0,
    joined_at           DATETIME(3) NOT NULL,
    muted               TINYINT NOT NULL DEFAULT 0,
    PRIMARY KEY (conversation_id, user_id),
    KEY idx_user_id (user_id)
);

CREATE TABLE IF NOT EXISTS messages (
    id               BIGINT PRIMARY KEY,
    conversation_id  BIGINT NOT NULL,
    sender_id        BIGINT NOT NULL,
    client_msg_id    VARCHAR(64) NOT NULL,
    message_type     SMALLINT NOT NULL,
    content          VARBINARY(65535) NOT NULL,
    status           TINYINT NOT NULL DEFAULT 1,
    created_at       DATETIME(3) NOT NULL,
    UNIQUE KEY uk_sender_conv_client_msg (sender_id, conversation_id, client_msg_id),
    KEY idx_conversation_id (conversation_id, id)
);

CREATE TABLE IF NOT EXISTS mailbox_events (
    id               BIGINT PRIMARY KEY,
    user_id          BIGINT NOT NULL,
    device_id        BIGINT NOT NULL,
    seq              BIGINT NOT NULL,
    event_type       SMALLINT NOT NULL,
    conversation_id  BIGINT NULL,
    payload          VARBINARY(4096),
    created_at       DATETIME(3) NOT NULL,
    UNIQUE KEY uk_user_device_seq (user_id, device_id, seq),
    KEY idx_user_device (user_id, device_id, seq)
);

CREATE TABLE IF NOT EXISTS device_sync_cursors (
    user_id          BIGINT NOT NULL,
    device_id        BIGINT NOT NULL,
    mailbox_seq      BIGINT NOT NULL DEFAULT 0,
    dialog_score     BIGINT NOT NULL DEFAULT 0,
    updated_at       DATETIME(3) NOT NULL,
    PRIMARY KEY (user_id, device_id)
);