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use crate::util::go_type::FFIError;
use crate::util::go_type::NosqldbTableRequestPtr;
use crate::util::util::ref_free_drop;

use self::ffi::nosqldb_table_request_new;
use self::ffi::nosqldb_table_request_set;
use self::ffi::nosqldb_table_request_set_table_limits;

use super::nosqldb_table_limits::NosqldbTableLimits;

pub(crate) mod ffi {
    use std::{ffi::c_uint, mem};

    use crate::{util::{go_type::{NosqldbTableLimitsPtr, NosqldbTableRequestPtr, FFIError, GoString, GoErrorPtr}, util::c_char_to_str}, str_to_gostr, nosqldb::nosqldb_table_limits::NosqldbTableLimits};

    use super::{NosqldbTableRequest, NosqldbTableRequestChild};

    extern "C" {
        fn ffi_nosqldb_table_request_new() -> NosqldbTableRequestPtr;
    }

    pub fn nosqldb_table_request_new(
    ) -> Result<NosqldbTableRequest, FFIError> {
        let nosqldb_table_request_ptr: NosqldbTableRequestPtr = unsafe { ffi_nosqldb_table_request_new() };

        Ok(NosqldbTableRequest{ nosqldb_table_request_ptr })
    }

    extern "C" {
        fn ffi_nosqldb_table_request_set(treq: NosqldbTableRequestPtr, key: c_uint, value: GoString) -> GoErrorPtr;
        fn ffi_nosqldb_table_request_set_table_limits(treq: NosqldbTableRequestPtr, tlmts: NosqldbTableLimitsPtr) -> GoErrorPtr;
    }

    pub fn nosqldb_table_request_set(
        treq: &mut NosqldbTableRequest,
        key: NosqldbTableRequestChild,
        value: &str,
    ) -> Result<(), FFIError> {
        str_to_gostr!(value);

        let err = unsafe { ffi_nosqldb_table_request_set(treq.nosqldb_table_request_ptr, key as c_uint, value) };
        if err.is_null() {
            Ok(())
        } else {
            Err(FFIError::GoError(c_char_to_str(err)?))
        }
    }

    pub fn nosqldb_table_request_set_table_limits (
        treq: &mut NosqldbTableRequest,
        tlmts: NosqldbTableLimits,
    ) -> Result<(), FFIError> {
        let err = unsafe { ffi_nosqldb_table_request_set_table_limits(treq.nosqldb_table_request_ptr, tlmts.nosqldb_table_limits_ptr) };
        mem::forget(tlmts);
        if err.is_null() {
            Ok(())
        } else {
            Err(FFIError::GoError(c_char_to_str(err)?))
        }
    }
}

#[derive(Debug)]
pub struct NosqldbTableRequest {
    pub(crate) nosqldb_table_request_ptr: NosqldbTableRequestPtr,
}

impl NosqldbTableRequest {
    pub fn new () -> Result<Self, FFIError> {
        nosqldb_table_request_new()
    }
    pub fn set (&mut self, key: NosqldbTableRequestChild, value: &str) -> Result<(), FFIError> {
        nosqldb_table_request_set(self, key, value)
    }
    pub fn set_tlmts (&mut self, tlmts: NosqldbTableLimits) -> Result<(), FFIError> {
        nosqldb_table_request_set_table_limits(self, tlmts)
    }
}

impl Drop for NosqldbTableRequest {
    fn drop(&mut self) {
        ref_free_drop(self.nosqldb_table_request_ptr);
    }
}

pub enum NosqldbTableRequestChild {
    Statement,
    TableName
}