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use std::collections::HashMap;

use serde_json::Value;

use crate::internal::prelude::*;
use crate::model::id::{ApplicationId, UserId};
use crate::model::invite::InviteTargetType;

/// A builder to create a [`RichInvite`] for use via [`GuildChannel::create_invite`].
///
/// This is a structured and cleaner way of creating an invite, as all
/// parameters are optional.
///
/// # Examples
///
/// Create an invite with a max age of 3600 seconds and 10 max uses:
///
/// ```rust,no_run
/// # #[cfg(all(feature = "cache", feature = "client"))]
/// # async fn run() -> Result<(), Box<dyn std::error::Error>> {
/// # use serenity::prelude::*;
/// # use serenity::model::prelude::*;
/// # use serenity::model::channel::Channel;
///
/// struct Handler;
///
/// #[serenity::async_trait]
/// impl EventHandler for Handler {
///     async fn message(&self, context: Context, msg: Message) {
///         if msg.content == "!createinvite" {
///             let channel = match context.cache.guild_channel(msg.channel_id).await {
///                 Some(channel) => channel,
///                 None => {
///                     let _ = msg.channel_id.say(&context, "Error creating invite").await;
///                     return;
///                 },
///             };
///
///             let creation =
///                 channel.create_invite(&context, |i| i.max_age(3600).max_uses(10)).await;
///
///             let invite = match creation {
///                 Ok(invite) => invite,
///                 Err(why) => {
///                     println!("Err creating invite: {:?}", why);
///                     if let Err(why) =
///                         msg.channel_id.say(&context, "Error creating invite").await
///                     {
///                         println!("Err sending err msg: {:?}", why);
///                     }
///
///                     return;
///                 },
///             };
///
///             let content = format!("Here's your invite: {}", invite.url());
///             let _ = msg.channel_id.say(&context, &content).await;
///         }
///     }
/// }
///
/// let mut client = Client::builder("token").event_handler(Handler).await?;
///
/// client.start().await?;
/// #     Ok(())
/// # }
/// ```
///
/// [`GuildChannel::create_invite`]: crate::model::channel::GuildChannel::create_invite
/// [`RichInvite`]: crate::model::invite::RichInvite
#[derive(Clone, Debug)]
pub struct CreateInvite(pub HashMap<&'static str, Value>);

impl CreateInvite {
    /// The duration that the invite will be valid for.
    ///
    /// Set to `0` for an invite which does not expire after an amount of time.
    ///
    /// Defaults to `86400`, or 24 hours.
    ///
    /// # Examples
    ///
    /// Create an invite with a max age of `3600` seconds, or 1 hour:
    ///
    /// ```rust,no_run
    /// # #[cfg(all(feature = "cache", feature = "client"))]
    /// # use serenity::client::Context;
    /// # #[cfg(feature = "framework")]
    /// # use serenity::framework::standard::{CommandResult, macros::command};
    /// # use serenity::model::id::ChannelId;
    /// #
    /// # #[cfg(all(feature = "cache", feature = "client", feature = "framework", feature = "http"))]
    /// # #[command]
    /// # async fn example(context: &Context) -> CommandResult {
    /// #     let channel = context.cache.guild_channel(81384788765712384).await.unwrap();
    /// #
    /// let invite = channel.create_invite(context, |i| {
    ///     i.max_age(3600)
    /// })
    /// .await?;
    /// #     Ok(())
    /// # }
    /// ```
    pub fn max_age(&mut self, max_age: u64) -> &mut Self {
        self.0.insert("max_age", Value::Number(Number::from(max_age)));
        self
    }

    /// The number of uses that the invite will be valid for.
    ///
    /// Set to `0` for an invite which does not expire after a number of uses.
    ///
    /// Defaults to `0`.
    ///
    /// # Examples
    ///
    /// Create an invite with a max use limit of `5`:
    ///
    /// ```rust,no_run
    /// # #[cfg(all(feature = "cache", feature = "client"))]
    /// # use serenity::client::Context;
    /// # #[cfg(feature = "framework")]
    /// # use serenity::framework::standard::{CommandResult, macros::command};
    /// # use serenity::model::id::ChannelId;
    /// #
    /// # #[cfg(all(feature = "cache", feature = "client", feature = "framework", feature = "http"))]
    /// # #[command]
    /// # async fn example(context: &Context) -> CommandResult {
    /// #     let channel = context.cache.guild_channel(81384788765712384).await.unwrap();
    /// #
    /// let invite = channel.create_invite(context, |i| {
    ///     i.max_uses(5)
    /// })
    /// .await?;
    /// #     Ok(())
    /// # }
    /// ```
    pub fn max_uses(&mut self, max_uses: u64) -> &mut Self {
        self.0.insert("max_uses", Value::Number(Number::from(max_uses)));
        self
    }

    /// Whether an invite grants a temporary membership.
    ///
    /// Defaults to `false`.
    ///
    /// # Examples
    ///
    /// Create an invite which is temporary:
    ///
    /// ```rust,no_run
    /// # #[cfg(all(feature = "cache", feature = "client"))]
    /// # use serenity::client::Context;
    /// # #[cfg(feature = "framework")]
    /// # use serenity::framework::standard::{CommandResult, macros::command};
    /// # use serenity::model::id::ChannelId;
    /// #
    /// # #[cfg(all(feature = "cache", feature = "client", feature = "framework", feature = "http"))]
    /// # #[command]
    /// # async fn example(context: &Context) -> CommandResult {
    /// #     let channel = context.cache.guild_channel(81384788765712384).await.unwrap();
    /// #
    /// let invite = channel.create_invite(context, |i| {
    ///     i.temporary(true)
    /// })
    /// .await?;
    /// #     Ok(())
    /// # }
    /// #
    /// # fn main() {}
    /// ```
    pub fn temporary(&mut self, temporary: bool) -> &mut Self {
        self.0.insert("temporary", Value::Bool(temporary));
        self
    }

    /// Whether or not to try to reuse a similar invite.
    ///
    /// Defaults to `false`.
    ///
    /// # Examples
    ///
    /// Create an invite which is unique:
    ///
    /// ```rust,no_run
    /// # #[cfg(all(feature = "cache", feature = "client"))]
    /// # use serenity::client::Context;
    /// # #[cfg(feature = "framework")]
    /// # use serenity::framework::standard::{CommandResult, macros::command};
    /// # use serenity::model::id::ChannelId;
    /// #
    /// # #[cfg(all(feature = "cache", feature = "client", feature = "framework", feature = "http"))]
    /// # #[command]
    /// # async fn example(context: &Context) -> CommandResult {
    /// #     let channel = context.cache.guild_channel(81384788765712384).await.unwrap();
    /// #
    /// let invite = channel.create_invite(context, |i| {
    ///     i.unique(true)
    /// })
    /// .await?;
    /// #     Ok(())
    /// # }
    /// ```
    pub fn unique(&mut self, unique: bool) -> &mut Self {
        self.0.insert("unique", Value::Bool(unique));
        self
    }

    /// The type of target for this voice channel invite.
    pub fn target_type(&mut self, target_type: InviteTargetType) -> &mut Self {
        self.0.insert("target_type", Value::Number(Number::from(target_type as u8)));
        self
    }

    /// The ID of the user whose stream to display for this invite, required if `target_type` is
    /// `Stream`
    /// The user must be streaming in the channel.
    pub fn target_user_id(&mut self, target_user_id: UserId) -> &mut Self {
        self.0.insert("target_user_id", Value::Number(Number::from(target_user_id.0)));
        self
    }

    /// The ID of the embedded application to open for this invite, required if `target_type` is
    /// `EmmbeddedApplication`
    /// The application must have the `EMBEDDED` flag.
    ///
    /// When sending an invite with this value, the first user to use the invite will have to click
    /// on the URL, that will enable the buttons in the embed.
    ///
    /// These are some of the known applications which have the flag:
    ///
    /// betrayal: `773336526917861400`
    /// youtube: `755600276941176913`
    /// fishing: `814288819477020702`
    /// poker: `755827207812677713`
    /// chess: `832012774040141894`
    pub fn target_application_id(&mut self, target_application_id: ApplicationId) -> &mut Self {
        self.0
            .insert("target_application_id", Value::Number(Number::from(target_application_id.0)));
        self
    }
}

impl Default for CreateInvite {
    /// Creates a builder with default values, setting `validate` to `null`.
    ///
    /// # Examples
    ///
    /// Create a default [`CreateInvite`] builder:
    ///
    /// ```rust
    /// use serenity::builder::CreateInvite;
    ///
    /// let invite_builder = CreateInvite::default();
    /// ```
    fn default() -> CreateInvite {
        let mut map = HashMap::new();
        map.insert("validate", Value::Null);

        CreateInvite(map)
    }
}