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use super::mime::Mime;
use assert_impl::assert_impl;
use qiniu_apis::{
    http::Extensions,
    http_client::{FileName, RegionsProvider},
};
use qiniu_utils::ObjectName;
use std::{collections::HashMap, mem::take, sync::Arc};

/// 对象上传参数
#[derive(Debug, Default, Clone)]
pub struct ObjectParams(Arc<ObjectParamsInner>);

#[derive(Debug, Default)]
struct ObjectParamsInner {
    region_provider: Option<Box<dyn RegionsProvider>>,
    object_name: Option<ObjectName>,
    file_name: Option<FileName>,
    content_type: Option<Mime>,
    metadata: HashMap<String, String>,
    custom_vars: HashMap<String, String>,
    extensions: Extensions,
}

impl ObjectParams {
    /// 创建对象上传参数构建器
    #[inline]
    pub fn builder() -> ObjectParamsBuilder {
        Default::default()
    }

    /// 获取区域信息提供者
    #[inline]
    pub fn region_provider(&self) -> Option<&dyn RegionsProvider> {
        self.0.region_provider.as_deref()
    }

    /// 获取对象名称
    #[inline]
    pub fn object_name(&self) -> Option<&str> {
        self.0.object_name.as_deref()
    }

    /// 获取文件名称
    #[inline]
    pub fn file_name(&self) -> Option<&str> {
        self.0.file_name.as_deref()
    }

    /// 获取 MIME 类型
    #[inline]
    pub fn content_type(&self) -> Option<&Mime> {
        self.0.content_type.as_ref()
    }

    /// 获取对象元信息
    #[inline]
    pub fn metadata(&self) -> &HashMap<String, String> {
        &self.0.metadata
    }

    /// 获取对象自定义变量
    #[inline]
    pub fn custom_vars(&self) -> &HashMap<String, String> {
        &self.0.custom_vars
    }

    /// 获取扩展信息
    #[inline]
    pub fn extensions(&self) -> &Extensions {
        &self.0.extensions
    }

    #[allow(dead_code)]
    fn assert() {
        assert_impl!(Send: Self);
        assert_impl!(Sync: Self);
    }
}

/// 对象上传参数构建器
#[derive(Debug)]
pub struct ObjectParamsBuilder(ObjectParamsInner);

impl Default for ObjectParamsBuilder {
    fn default() -> Self {
        Self(ObjectParamsInner {
            region_provider: Default::default(),
            object_name: Default::default(),
            file_name: Default::default(),
            content_type: Default::default(),
            metadata: Default::default(),
            custom_vars: Default::default(),
            extensions: Default::default(),
        })
    }
}

impl ObjectParamsBuilder {
    /// 设置区域信息提供者
    #[inline]
    pub fn region_provider(&mut self, region_provider: impl RegionsProvider + 'static) -> &mut Self {
        self.0.region_provider = Some(Box::new(region_provider));
        self
    }

    /// 设置对象名称
    #[inline]
    pub fn object_name(&mut self, object_name: impl Into<ObjectName>) -> &mut Self {
        self.0.object_name = Some(object_name.into());
        self
    }

    /// 设置文件名称
    #[inline]
    pub fn file_name(&mut self, file_name: impl Into<FileName>) -> &mut Self {
        self.0.file_name = Some(file_name.into());
        self
    }

    /// 设置 MIME 类型
    #[inline]
    pub fn content_type(&mut self, content_type: Mime) -> &mut Self {
        self.0.content_type = Some(content_type);
        self
    }

    /// 设置对象元信息
    #[inline]
    pub fn metadata(&mut self, metadata: HashMap<String, String>) -> &mut Self {
        self.0.metadata = metadata;
        self
    }

    /// 添加对象元信息
    #[inline]
    pub fn insert_metadata<K: Into<String>, V: Into<String>>(&mut self, key: K, value: V) -> &mut Self {
        self.0.metadata.insert(key.into(), value.into());
        self
    }

    /// 设置对象自定义变量
    #[inline]
    pub fn custom_vars(&mut self, custom_vars: HashMap<String, String>) -> &mut Self {
        self.0.custom_vars = custom_vars;
        self
    }

    /// 添加对象自定义变量
    #[inline]
    pub fn insert_custom_var<K: Into<String>, V: Into<String>>(&mut self, key: K, value: V) -> &mut Self {
        self.0.custom_vars.insert(key.into(), value.into());
        self
    }

    /// 设置扩展信息
    #[inline]
    pub fn extensions(&mut self, extensions: Extensions) -> &mut Self {
        self.0.extensions = extensions;
        self
    }

    /// 添加扩展信息
    #[inline]
    pub fn insert_extension<T: Send + Sync + 'static>(&mut self, val: T) -> &mut Self {
        self.0.extensions.insert(val);
        self
    }

    /// 构建对象上传参数
    #[inline]
    pub fn build(&mut self) -> ObjectParams {
        ObjectParams(Arc::new(take(&mut self.0)))
    }

    #[allow(dead_code)]
    fn assert() {
        assert_impl!(Send: Self);
        assert_impl!(Sync: Self);
    }
}