use std::fmt;
use std::marker::PhantomData;

use hyper::method::Method;
use serde::json;

use response;
use request::RequestBuilder;
use request::DoRequest;

// name (true)  String           The human-readable string you wish to use when displaying the
//                               Droplet name. The name, if set to a domain name managed in the
//                               DigitalOcean DNS management system, will configure a PTR record
//                               for the Droplet. The name set during creation will also determine
//                               the hostname for the Droplet in its internal configuration.
// region (true) String          The unique slug id for the region that you wish to deploy in
// size (true)   String          The unique slug identifier for the size that you wish to select
//                               for this Droplet.
// image         number (if using an image ID), or String (if using a public image slug) The image ID of a public or private image, or the unique slug identifier for a public image. This image will be the base image for your Droplet.    true
// ssh_keys      Array           An array containing the IDs or fingerprints of the SSH keys that you wish to embed in the Droplet's root account upon creation.
// backups       Boolean         A boolean indicating whether automated backups should be enabled for the Droplet. Automated backups can only be enabled when the Droplet is created.
// ipv6          Boolean         A boolean indicating whether IPv6 is enabled on the Droplet.
// private_networking  Boolean  A boolean indicating whether private networking is enabled for the Droplet. Private networking is currently only available in certain regions.
// user_data     String          A string of the desired User Data for the Droplet. User Data is currently only available in regions with metadata listed in their features.
#[derive(Serialize)]
pub struct Droplet {
    pub name: String,
    pub region: String,
    pub size: String,
    pub image: String,
    pub ssh_keys: Option<Vec<String>>,
    pub backups: bool,
    pub ipv6: bool,
    pub private_networking: bool,
    pub user_data: Option<String>
}

#[derive(Serialize)]
struct DropletWithId {
    pub name: String,
    pub region: String,
    pub size: String,
    pub image: u64,
    pub ssh_keys: Option<Vec<String>>,
    pub backups: bool,
    pub ipv6: bool,
    pub private_networking: bool,
    pub user_data: Option<String>
}

impl DropletWithId {
    fn from_droplet(d: &Droplet) -> DropletWithId {
        DropletWithId {
            name: d.name.clone(),
            region: d.region.clone(),
            size: d.size.clone(),
            image: d.image[..].parse().ok().unwrap(),
            ssh_keys: d.ssh_keys.clone(),
            backups: d.backups,
            ipv6: d.ipv6,
            private_networking: d.private_networking,
            user_data: d.user_data.clone()
        }
    }
}

impl fmt::Display for Droplet {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f,
            "Name: {}\n\
             Region: {}\n\
             Size: {}\n\
             Image: {}\n\
             SSH Keys: {}\n\
             Backups Enabled: {}\n\
             IPv6 Enabled: {}\n\
             Private Networking Enabled: {}\n\
             User Data: {}\n",
             self.name,
             self.region,
             self.size,
             self.image,
             if let Some(ref v) = self.ssh_keys {
                v.iter().fold(String::new(), |acc, s| acc + &format!(" {},", s)[..])
             } else {
                "None".to_owned()
             },
             self.backups,
             self.ipv6,
             self.private_networking,
             if let Some(d) = self.user_data.clone() {
                d
             } else {
                "None".to_owned()
             }
        )
    }
}

impl fmt::Display for DropletWithId {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f,
            "Name: {}\n\
             Region: {}\n\
             Size: {}\n\
             Image: {}\n\
             SSH Keys: {}\n\
             Backups Enabled: {}\n\
             IPv6 Enabled: {}\n\
             Private Networking Enabled: {}\n\
             User Data: {}\n",
             self.name,
             self.region,
             self.size,
             self.image,
             if let Some(ref v) = self.ssh_keys {
                v.iter().fold(String::new(), |acc, s| acc + &format!(" {},", s)[..])
             } else {
                "None".to_owned()
             },
             self.backups,
             self.ipv6,
             self.private_networking,
             if let Some(d) = self.user_data.clone() {
                d
             } else {
                "None".to_owned()
             }
        )
    }
}

impl<'t> RequestBuilder<'t, response::Droplet> {
    pub fn disable_backups(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "disable_backups"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"disable_backups\"}}"))
        }
    }
    pub fn reboot(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "reboot"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"reboot\"}}"))
        }
    }
    pub fn power_cycle(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "power_cycle"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"power_cycle\"}}"))
        }
    }
    pub fn shutdown(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "shutdown"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"shutdown\"}}"))
        }
    }
    pub fn power_off(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "power_off"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"power_off\"}}"))
        }
    }
    pub fn power_on(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "power_on"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"power_on\"}}"))
        }
    }
    pub fn restore(mut self, img: &str) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "restore"
        //      "image": 12356          // number if ID, string if slug
        self.url.push_str("/actions");
        let image = match img.parse::<u64>() {
            Ok(_)  => img.to_string(),
            Err(_) => format!("\"{}\"", img)
        };
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"restore\",\"image\":{}}}", image))
        }
    }
    pub fn reset_password(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "password_reset"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"password_reset\"}}"))
        }
    }
    pub fn resize(mut self, size: &str, disk: bool) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "resize"
        //      "disk" : bool
        //      "size" : "1gb"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"resize\",\"disk\":{},\"size\":{:?}}}", disk.to_string(), size))
        }
    }
    pub fn rebuild(mut self, img: &str) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "rebuild"
        //      "image": 12356          // number if ID, string if slug
        self.url.push_str("/actions");
        let image = match img.parse::<u64>() {
            Ok(_)  => img.to_string(),
            Err(_) => format!("\"{}\"", img)
        };
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"rebuild\",\"image\":{}}}", image))
        }
    }
    pub fn rename(mut self, name: &str) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "rename"
        //      "name" : "some name"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"rename\",\"name\":{:?}}}", name))
        }
    }
    pub fn change_kernel(mut self, kernel: &str) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "change_kernel"
        //      "kernel" :  1234566
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"change_kernel\",\"kernel\":{}}}", kernel))
        }
    }
    pub fn enable_ipv6(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "enable_ipv6"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"enable_ipv6\"}}"))
        }
    }
    pub fn enable_private_networking(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "enable_private_networking"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"enable_private_networking\"}}"))
        }
    }
    pub fn snapshot(mut self, name: &str) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "snapshot"
        //      "name" : "some name"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"snapshot\",\"name\":{:?}}}", name))
        }
    }
    pub fn upgrade(mut self) -> RequestBuilder<'t, response::Action> {
        // POST: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        // body:
        //      "type" : "upgrade"
        self.url.push_str("/actions");
        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(format!("{{\"type\":\"upgrade\"}}"))
        }
    }
    pub fn action(mut self, id: &str) -> RequestBuilder<'t, response::Action> {
        // GET: "https://api.digitalocean.com/v2/droplets/$ID/actions/$ACTION_ID"
        self.url.push_str("/actions/");
        self.url.push_str(id);
        RequestBuilder::new(self.auth, self.url)
    }
    pub fn kernels(mut self) -> RequestBuilder<'t, response::Kernels> {
        // GET: "https://api.digitalocean.com/v2/droplets/$ID/kernels"
        self.url.push_str("/kernels");
        RequestBuilder::new(self.auth, self.url)
    }
    pub fn snapshots(mut self) -> RequestBuilder<'t, response::Snapshots> {
        // GET: "https://api.digitalocean.com/v2/droplets/$ID/snapshots"
        self.url.push_str("/snapshots");
        RequestBuilder::new(self.auth, self.url)
    }
    pub fn backups(mut self) -> RequestBuilder<'t, response::Backups> {
        // GET: "https://api.digitalocean.com/v2/droplets/$ID/backups"
        self.url.push_str("/backups");
        RequestBuilder::new(self.auth, self.url)
    }
    pub fn actions(mut self) -> RequestBuilder<'t, response::Actions> {
        // GET: "https://api.digitalocean.com/v2/droplets/$ID/actions"
        self.url.push_str("/actions");
        RequestBuilder::new(self.auth, self.url)
    }
    pub fn delete(self) -> RequestBuilder<'t, response::HeaderOnly> {
        // DELETE: "https://api.digitalocean.com/v2/droplets/$ID"
        RequestBuilder {
            method: Method::Delete,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: None
        }
    }
    pub fn show(&self) -> RequestBuilder<'t, response::Droplet> {
        unimplemented!()
    }
    pub fn neighbors(mut self) -> RequestBuilder<'t, response::Droplets> {
        // GET: "https://api.digitalocean.com/v2/droplets/$ID/neighbors"
        self.url.push_str("/neighbors");
        RequestBuilder::new(self.auth, self.url)
    }
}

impl<'t> RequestBuilder<'t, response::Droplets> {
    pub fn create(self, droplet: &Droplet) -> RequestBuilder<'t, response::Droplet> {
        // POST:
        // body:
        //      "name" : ""             // true
        //      "region" : ""           // true
        //      "size" : ""             // true
        //      "image" : ""            // true
        //      "ssh_keys" : ""
        //      "backups" : ""
        //      "ipv6" : ""
        //      "private_networking" : ""
        //      "user_data" : ""

        // FIXME: don't unwrap()

        if droplet.image[..].parse::<u64>().is_ok() {
            let d = DropletWithId::from_droplet(droplet);
            return RequestBuilder {
                method: Method::Post,
                auth: self.auth,
                url: self.url,
                resp_t: PhantomData,
                body: Some(json::to_string(&d).ok().unwrap())
            }
        }

        RequestBuilder {
            method: Method::Post,
            auth: self.auth,
            url: self.url,
            resp_t: PhantomData,
            body: Some(json::to_string(droplet).ok().unwrap())
        }

    }
    pub fn neighbors(self) -> RequestBuilder<'t, response::Neighbors> {
        // GET: "https://api.digitalocean.com/v2/reports/droplet_neighbors"
        RequestBuilder::new(self.auth, "https://api.digitalocean.com/v2/reports/droplet_neighbors")
    }
    pub fn upgrades(self) -> RequestBuilder<'t, response::ResponseStringArray> {
        // GET: "https://api.digitalocean.com/v2/droplet_upgrades"
        RequestBuilder::new(self.auth, "https://api.digitalocean.com/v2/droplet_upgrades")
    }
}

impl<'t> DoRequest<response::Droplet> for RequestBuilder<'t, response::Droplet> {}