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#![warn(missing_docs)]
//! Contains Query Frame related functionality.
use rand;

use crate::consistency::Consistency;
use crate::frame::*;
use crate::query::{Query, QueryFlags, QueryParams, QueryValues};
use crate::types::*;

/// Structure which represents body of Query request
#[derive(Debug)]
pub struct BodyReqQuery {
    /// Query string.
    pub query: CStringLong,
    /// Query parameters.
    pub query_params: QueryParams,
}

impl BodyReqQuery {
    // Fabric function that produces Query request body.
    fn new(
        query: String,
        consistency: Consistency,
        values: Option<QueryValues>,
        with_names: Option<bool>,
        page_size: Option<i32>,
        paging_state: Option<CBytes>,
        serial_consistency: Option<Consistency>,
        timestamp: Option<i64>,
    ) -> BodyReqQuery {
        // query flags
        let mut flags: Vec<QueryFlags> = vec![];
        if values.is_some() {
            flags.push(QueryFlags::Value);
        }
        if with_names.unwrap_or(false) {
            flags.push(QueryFlags::WithNamesForValues);
        }
        if page_size.is_some() {
            flags.push(QueryFlags::PageSize);
        }
        if paging_state.is_some() {
            flags.push(QueryFlags::WithPagingState);
        }
        if serial_consistency.is_some() {
            flags.push(QueryFlags::WithSerialConsistency);
        }
        if timestamp.is_some() {
            flags.push(QueryFlags::WithDefaultTimestamp);
        }

        BodyReqQuery {
            query: CStringLong::new(query),
            query_params: QueryParams {
                consistency,
                flags,
                with_names,
                values,
                page_size,
                paging_state,
                serial_consistency,
                timestamp,
            },
        }
    }
}

impl IntoBytes for BodyReqQuery {
    fn into_cbytes(&self) -> Vec<u8> {
        let mut v: Vec<u8> = vec![];
        v.extend_from_slice(self.query.clone().into_cbytes().as_slice());
        v.extend_from_slice(self.query_params.into_cbytes().as_slice());
        v
    }
}

// Frame implementation related to BodyReqStartup

impl Frame {
    /// **Note:** This function should be used internally for building query request frames.
    pub fn new_req_query(
        query: String,
        consistency: Consistency,
        values: Option<QueryValues>,
        with_names: Option<bool>,
        page_size: Option<i32>,
        paging_state: Option<CBytes>,
        serial_consistency: Option<Consistency>,
        timestamp: Option<i64>,
        flags: Vec<Flag>,
    ) -> Frame {
        let version = Version::Request;
        let stream = rand::random::<u16>();
        let opcode = Opcode::Query;
        let body = BodyReqQuery::new(
            query,
            consistency,
            values,
            with_names,
            page_size,
            paging_state,
            serial_consistency,
            timestamp,
        );

        Frame {
            version: version,
            flags: flags,
            stream: stream,
            opcode: opcode,
            body: body.into_cbytes(),
            // for request frames it's always None
            tracing_id: None,
            warnings: vec![],
        }
    }

    /// **Note:** This function should be used internally for building query request frames.
    pub fn new_query(query: Query, flags: Vec<Flag>) -> Frame {
        Frame::new_req_query(
            query.query,
            query.params.consistency,
            query.params.values,
            query.params.with_names,
            query.params.page_size,
            query.params.paging_state,
            query.params.serial_consistency,
            query.params.timestamp,
            flags,
        )
    }
}