use crate::request::prelude::*;
use twilight_model::{
    guild::{Permissions, Role},
    id::{GuildId, RoleId},
};

#[derive(Default, Serialize)]
struct UpdateRoleFields {
    color: Option<u64>,
    hoist: Option<bool>,
    mentionable: Option<bool>,
    name: Option<String>,
    permissions: Option<Permissions>,
}

pub struct UpdateRole<'a> {
    fields: UpdateRoleFields,
    fut: Option<Pending<'a, Role>>,
    guild_id: GuildId,
    http: &'a Client,
    role_id: RoleId,
    reason: Option<String>,
}

impl<'a> UpdateRole<'a> {
    pub(crate) fn new(http: &'a Client, guild_id: GuildId, role_id: RoleId) -> Self {
        Self {
            fields: UpdateRoleFields::default(),
            fut: None,
            guild_id,
            http,
            role_id,
            reason: None,
        }
    }

    pub fn color(mut self, color: u64) -> Self {
        self.fields.color.replace(color);

        self
    }

    pub fn hoist(mut self, hoist: bool) -> Self {
        self.fields.hoist.replace(hoist);

        self
    }

    pub fn mentionable(mut self, mentionable: bool) -> Self {
        self.fields.mentionable.replace(mentionable);

        self
    }

    pub fn name(mut self, name: impl Into<String>) -> Self {
        self.fields.name.replace(name.into());

        self
    }

    pub fn permissions(mut self, permissions: Permissions) -> Self {
        self.fields.permissions.replace(permissions);

        self
    }

    pub fn reason(mut self, reason: impl Into<String>) -> Self {
        self.reason.replace(reason.into());

        self
    }

    fn start(&mut self) -> Result<()> {
        let request = if let Some(reason) = &self.reason {
            let headers = audit_header(&reason)?;
            Request::from((
                serde_json::to_vec(&self.fields)?,
                headers,
                Route::UpdateRole {
                    guild_id: self.guild_id.0,
                    role_id: self.role_id.0,
                },
            ))
        } else {
            Request::from((
                serde_json::to_vec(&self.fields)?,
                Route::UpdateRole {
                    guild_id: self.guild_id.0,
                    role_id: self.role_id.0,
                },
            ))
        };

        self.fut.replace(Box::pin(self.http.request(request)));

        Ok(())
    }
}

poll_req!(UpdateRole<'_>, Role);
