//--- overlay cache ---//

model node (
    key id

    index (
        name node_last_ip
        fields last_net
    )

    index (
        name nodes_dis_unk_off_exit_fin_last_success_index
        fields disqualified unknown_audit_suspended offline_suspended exit_finished_at last_contact_success
    )

    index (
        // N.B. the index doesn't have a name which clarifies its purpose because
        // it was created in the production DBs as it's before being added here
        name nodes_type_last_cont_success_free_disk_ma_mi_patch_vetted_partial_index
        fields type last_contact_success free_disk  major minor patch vetted_at
        where node.disqualified = null
        where node.unknown_audit_suspended = null
        where node.exit_initiated_at = null
        where node.release = true
        where node.last_net != ""
    )

    index (
        // N.B. the index doesn't have a name which clarifies its purpose because
        // it was created in the production DBs as it's before being added here
        name nodes_dis_unk_aud_exit_init_rel_type_last_cont_success_stored_index
        fields disqualified  unknown_audit_suspended  exit_initiated_at  release  type  last_contact_success
        where node.disqualified = null
        where node.unknown_audit_suspended = null
        where node.exit_initiated_at = null
        where node.release = true
    )

    field id              blob
    // address is how to contact the node, this can be a hostname or IP and it contains the port
    field address         text  ( updatable, default "" ) // TODO: use compressed format
    // last_net is the /24 subnet of the IP
    field last_net        text  ( updatable )
    field last_ip_port    text  ( updatable, nullable )
    field country_code    text  ( updatable, nullable )
    field protocol        int   ( updatable, default 0 )
    field type            int   ( updatable, default 0 )
    field email           text  ( updatable )
    field wallet          text  ( updatable ) // TODO: use compressed format
    field wallet_features text  ( updatable, default "" )
    field free_disk       int64 ( updatable, default -1 )
    field piece_count     int64 ( autoinsert, updatable, default 0 )

    field major             int64 ( updatable, default 0 )
    field minor             int64 ( updatable, default 0 )
    field patch             int64 ( updatable, default 0 )
    field hash              text ( updatable, default "" )
    field timestamp         timestamp ( updatable, default "0001-01-01 00:00:00+00" )
    field release           bool ( updatable, default false )

    field latency_90           int64   ( updatable, default 0 )
    field vetted_at            timestamp ( updatable, nullable )

    field created_at           timestamp ( autoinsert, default current_timestamp )
    field updated_at           timestamp ( autoinsert, autoupdate, default current_timestamp )
    field last_contact_success timestamp ( updatable, default "epoch" )
    field last_contact_failure timestamp ( updatable, default "epoch" )

    // node is disqualified when it fails too many audits or is offline for too long
    field disqualified            timestamp ( updatable, nullable )
    field disqualification_reason int       ( updatable, nullable )
    // node is placed under inspection when it has too many unknown-error audits
    // renamed column from suspended
    field unknown_audit_suspended timestamp ( updatable, nullable )
    // node is considered unhealthy if it is offline for too many audits
    field offline_suspended timestamp ( updatable, nullable )
    // once a node becomes offline_suspended, mark it as under review so we check it again later
    field under_review timestamp ( updatable, nullable )

    field exit_initiated_at         timestamp ( updatable, nullable )
    field exit_loop_completed_at    timestamp ( updatable, nullable )
    field exit_finished_at          timestamp ( updatable, nullable )
    field exit_success              bool ( updatable, default false )

    field contained                 timestamp ( updatable, nullable )

    field last_offline_email         timestamp ( updatable, nullable )
    field last_software_update_email timestamp ( updatable, nullable )
)

update node ( where node.id = ? )
update node (
    where node.id = ?
    noreturn
)

update node (
    where node.id = ?
    where node.disqualified = null
    where node.exit_finished_at = null
    noreturn
)

// "Get" query; fails if node not found
read one (
    select node
    where  node.id = ?
)

read all (
    select node.id
)

read paged (
    select node
)

read all (
    select node.id node.piece_count
    where node.piece_count != 0
)

// -- node api version -- //

model node_api_version (
    key id

    field id          blob
    field api_version int  ( updatable )

    field created_at timestamp ( autoinsert )
    field updated_at timestamp ( autoinsert, autoupdate )
)

create node_api_version (
    noreturn
    replace
)

read has (
    select node_api_version
    where node_api_version.id          =  ?
    where node_api_version.api_version >= ?
)

update node_api_version (
    where node_api_version.id          = ?
    where node_api_version.api_version < ?
    noreturn
)

//-- Node Events --//
model node_event (
    key id

    index (
        name node_events_email_event_created_at_index
        fields email event created_at
        where node_event.email_sent = null
    )

    field id blob
    field email text
    field node_id blob
    field event int
    field created_at timestamp ( default current_timestamp )
    field last_attempted timestamp ( nullable, updatable )
    field email_sent timestamp ( nullable, updatable )
)

create node_event()

read one (
    select node_event
    where node_event.id = ?
)

read first (
    select node_event
    where node_event.email = ?
    where node_event.event = ?
    orderby desc node_event.created_at
)

delete node_event ( where node_event.created_at < ? )