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/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

///
/// Config builder for the database
///
/// ```rust
/// use polodb_core::ConfigBuilder;
/// let mut config_builder = ConfigBuilder::new();
/// config_builder
///     .set_init_block_count(100)
///     .set_journal_full_size(1000);
/// let config = config_builder.take();
/// ```
pub struct ConfigBuilder {
    inner: Config,
}

impl ConfigBuilder {

    pub fn new() -> ConfigBuilder {
        ConfigBuilder {
            inner: Config::default(),
        }
    }

    pub fn get_init_block_count(&self) -> u64 {
        self.inner.init_block_count
    }

    pub fn set_init_block_count(&mut self, v: u64) -> &mut Self {
        self.inner.init_block_count = v;
        self
    }

    pub fn get_journal_full_size(&self) -> u64 {
        self.inner.journal_full_size
    }

    pub fn set_journal_full_size(&mut self, v: u64) -> &mut Self {
        self.inner.journal_full_size = v;
        self
    }

    pub fn get_lsm_page_size(&self) -> u32 {
        self.inner.lsm_page_size
    }

    pub fn set_lsm_page_size(&mut self, v: u32) -> &mut Self {
        self.inner.lsm_page_size = v;
        self
    }

    pub fn get_lsm_block_size(&self) -> u32 {
        self.inner.lsm_block_size
    }

    pub fn set_lsm_block_size(&mut self, v: u32) -> &mut Self {
        self.inner.lsm_block_size = v;
        self
    }

    pub fn get_sync_log_count(&self) -> u64 {
        self.inner.sync_log_count
    }

    pub fn set_sync_log_count(&mut self, v: u64) -> &mut Self {
        self.inner.sync_log_count = v;
        self
    }

    pub fn take(self) -> Config {
        self.inner
    }

}


pub struct Config {
    pub init_block_count:  u64,
    pub journal_full_size: u64,
    pub lsm_page_size:     u32,
    pub lsm_block_size:    u32,
    pub sync_log_count:    u64,
}

#[cfg(not(target_arch = "wasm32"))]
const SYNC_LOG_COUNT: u64 = 1000;

#[cfg(target_arch = "wasm32")]
const SYNC_LOG_COUNT: u64 = 200;


impl Default for Config {

    fn default() -> Self {
        Config {
            init_block_count: 16,
            journal_full_size: 1000,
            lsm_page_size: 4096,
            lsm_block_size: 4 * 1024 * 1024,
            sync_log_count: SYNC_LOG_COUNT,
        }
    }

}