/*
 * meli - jmap module.
 *
 * Copyright 2019 Manos Pitsidianakis
 *
 * This file is part of meli.
 *
 * meli is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * meli is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with meli. If not, see <http://www.gnu.org/licenses/>.
 */

use super::*;
use crate::backends::jmap::rfc8620::bool_false;
use crate::email::address::{Address, MailboxAddress};
use core::marker::PhantomData;
use serde::de::{Deserialize, Deserializer};
use serde_json::value::RawValue;
use serde_json::Value;
use std::collections::hash_map::DefaultHasher;
use std::collections::HashMap;
use std::hash::Hasher;

mod import;
pub use import::*;

#[derive(Debug)]
pub struct ThreadObject;

impl Object for ThreadObject {
    const NAME: &'static str = "Thread";
}

impl Id<EmailObject> {
    pub fn into_hash(&self) -> EnvelopeHash {
        let mut h = DefaultHasher::new();
        h.write(self.inner.as_bytes());
        h.finish()
    }
}

// 4.1.1.
// Metadata
// These properties represent metadata about the message in the mail
// store and are not derived from parsing the message itself.
//
//   o  id: "Id" (immutable; server-set)
//
//      The id of the Email object.  Note that this is the JMAP object id,
//      NOT the Message-ID header field value of the message [RFC5322].
//
//   o  blobId: "Id" (immutable; server-set)
//
//      The id representing the raw octets of the message [RFC5322] for
//      this Email.  This may be used to download the raw original message
//      or to attach it directly to another Email, etc.
//
//   o  threadId: "Id" (immutable; server-set)
//
//      The id of the Thread to which this Email belongs.
//
//   o  mailboxIds: "Id[Boolean]"
//
//      The set of Mailbox ids this Email belongs to.  An Email in the
//      mail store MUST belong to one or more Mailboxes at all times
//      (until it is destroyed).  The set is represented as an object,
//      with each key being a Mailbox id.  The value for each key in the
//      object MUST be true.
//
//   o  keywords: "String[Boolean]" (default: {})
//
//      A set of keywords that apply to the Email.  The set is represented
//      as an object, with the keys being the keywords.  The value for
//      each key in the object MUST be true.
//
//      Keywords are shared with IMAP.  The six system keywords from IMAP
//      get special treatment.  The following four keywords have their
//      first character changed from "\" in IMAP to "$" in JMAP and have
//      particular semantic meaning:
//
//      *  "$draft": The Email is a draft the user is composing.
//
//      *  "$seen": The Email has been read.
//
//      *  "$flagged": The Email has been flagged for urgent/special
//         attention.
//
//      *  "$answered": The Email has been replied to.
//
//      The IMAP "\Recent" keyword is not exposed via JMAP.  The IMAP
//      "\Deleted" keyword is also not present: IMAP uses a delete+expunge
//      model, which JMAP does not.  Any message with the "\Deleted"
//      keyword MUST NOT be visible via JMAP (and so are not counted in
//      the "totalEmails", "unreadEmails", "totalThreads", and
//      "unreadThreads" Mailbox properties).
//
//      Users may add arbitrary keywords to an Email.  For compatibility
//      with IMAP, a keyword is a case-insensitive string of 1-255
//      characters in the ASCII subset %x21-%x7e (excludes control chars
//      and space), and it MUST NOT include any of these characters:
//
//                              ( ) { ] % * " \
//
//      Because JSON is case sensitive, servers MUST return keywords in
//      lowercase.
//
//      The IANA "IMAP and JMAP Keywords" registry at
//      <https://www.iana.org/assignments/imap-jmap-keywords/> as
//      established in [RFC5788] assigns semantic meaning to some other
//      keywords in common use.  New keywords may be established here in
//      the future.  In particular, note:
//
//      *  "$forwarded": The Email has been forwarded.
//
//      *  "$phishing": The Email is highly likely to be phishing.
//         Clients SHOULD warn users to take care when viewing this Email
//         and disable links and attachments.
//
//      *  "$junk": The Email is definitely spam.  Clients SHOULD set this
//         flag when users report spam to help train automated spam-
//         detection systems.
//
//      *  "$notjunk": The Email is definitely not spam.  Clients SHOULD
//         set this flag when users indicate an Email is legitimate, to
//         help train automated spam-detection systems.
//
//   o  size: "UnsignedInt" (immutable; server-set)
//
//      The size, in octets, of the raw data for the message [RFC5322] (as
//      referenced by the "blobId", i.e., the number of octets in the file
//      the user would download).
//
//   o  receivedAt: "UTCDate" (immutable; default: time of creation on
//      server)
//
//      The date the Email was received by the message store.  This is the
//      "internal date" in IMAP [RFC3501]./

#[derive(Deserialize, Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct EmailObject {
    #[serde(default)]
    pub id: Id<EmailObject>,
    #[serde(default)]
    pub blob_id: Id<BlobObject>,
    #[serde(default)]
    pub mailbox_ids: HashMap<Id<MailboxObject>, bool>,
    #[serde(default)]
    pub size: u64,
    #[serde(default)]
    pub received_at: String,
    #[serde(default)]
    pub message_id: Vec<String>,
    #[serde(default)]
    pub to: Option<SmallVec<[EmailAddress; 1]>>,
    #[serde(default)]
    pub bcc: Option<Vec<EmailAddress>>,
    #[serde(default)]
    pub reply_to: Option<Vec<EmailAddress>>,
    #[serde(default)]
    pub cc: Option<SmallVec<[EmailAddress; 1]>>,
    #[serde(default)]
    pub sender: Option<Vec<EmailAddress>>,
    #[serde(default)]
    pub from: Option<SmallVec<[EmailAddress; 1]>>,
    #[serde(default)]
    pub in_reply_to: Option<Vec<String>>,
    #[serde(default)]
    pub references: Option<Vec<String>>,
    #[serde(default)]
    pub keywords: HashMap<String, bool>,
    #[serde(default)]
    pub attached_emails: Option<Id<BlobObject>>,
    #[serde(default)]
    pub attachments: Vec<Value>,
    #[serde(default)]
    pub has_attachment: bool,
    #[serde(default)]
    #[serde(deserialize_with = "deserialize_header")]
    pub headers: HashMap<String, String>,
    #[serde(default)]
    pub html_body: Vec<HtmlBody>,
    #[serde(default)]
    pub preview: Option<String>,
    #[serde(default)]
    pub sent_at: Option<String>,
    #[serde(default)]
    pub subject: Option<String>,
    #[serde(default)]
    pub text_body: Vec<TextBody>,
    #[serde(default)]
    pub thread_id: Id<ThreadObject>,
    #[serde(flatten)]
    pub extra: HashMap<String, Value>,
}

impl EmailObject {
    _impl!(get keywords, keywords: HashMap<String, bool>);
}

#[derive(Deserialize, Serialize, Debug, Default)]
#[serde(rename_all = "camelCase")]
pub struct Header {
    pub name: String,
    pub value: String,
}

fn deserialize_header<'de, D>(
    deserializer: D,
) -> std::result::Result<HashMap<String, String>, D::Error>
where
    D: Deserializer<'de>,
{
    let v = <Vec<Header>>::deserialize(deserializer)?;
    Ok(v.into_iter().map(|t| (t.name, t.value)).collect())
}

#[derive(Deserialize, Serialize, Debug, Default)]
#[serde(rename_all = "camelCase")]
pub struct EmailAddress {
    pub email: String,
    pub name: Option<String>,
}

impl Into<crate::email::Address> for EmailAddress {
    fn into(self) -> crate::email::Address {
        let Self { email, mut name } = self;
        crate::make_address!((name.take().unwrap_or_default()), email)
    }
}

impl std::fmt::Display for EmailAddress {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        if self.name.is_some() {
            write!(f, "{} <{}>", self.name.as_ref().unwrap(), &self.email)
        } else {
            write!(f, "{}", &self.email)
        }
    }
}

impl std::convert::From<EmailObject> for crate::Envelope {
    fn from(mut t: EmailObject) -> crate::Envelope {
        let mut env = crate::Envelope::new(0);
        if let Ok(d) = crate::email::parser::dates::rfc5322_date(env.date_as_str().as_bytes()) {
            env.set_datetime(d);
        }
        if let Some(ref mut sent_at) = t.sent_at {
            let unix =
                crate::datetime::rfc3339_to_timestamp(sent_at.as_bytes().to_vec()).unwrap_or(0);
            env.set_datetime(unix);
            env.set_date(std::mem::replace(sent_at, String::new()).as_bytes());
        }

        if let Some(v) = t.message_id.get(0) {
            env.set_message_id(v.as_bytes());
        }
        if let Some(ref in_reply_to) = t.in_reply_to {
            env.set_in_reply_to(in_reply_to[0].as_bytes());
            env.push_references(env.in_reply_to().unwrap().clone());
        }
        if let Some(v) = t.headers.get("References") {
            let parse_result = crate::email::parser::address::msg_id_list(v.as_bytes());
            if let Ok((_, v)) = parse_result {
                for v in v {
                    env.push_references(v);
                }
            }
            env.set_references(v.as_bytes());
        }
        if let Some(v) = t.headers.get("Date") {
            env.set_date(v.as_bytes());
            if let Ok(d) = crate::email::parser::dates::rfc5322_date(v.as_bytes()) {
                env.set_datetime(d);
            }
        }
        env.set_has_attachments(t.has_attachment);
        if let Some(ref mut subject) = t.subject {
            env.set_subject(std::mem::replace(subject, String::new()).into_bytes());
        }

        if let Some(ref mut from) = t.from {
            env.set_from(
                std::mem::replace(from, SmallVec::new())
                    .into_iter()
                    .map(|addr| addr.into())
                    .collect::<SmallVec<[crate::email::Address; 1]>>(),
            );
        }
        if let Some(ref mut to) = t.to {
            env.set_to(
                std::mem::replace(to, SmallVec::new())
                    .into_iter()
                    .map(|addr| addr.into())
                    .collect::<SmallVec<[crate::email::Address; 1]>>(),
            );
        }

        if let Some(ref mut cc) = t.cc {
            env.set_cc(
                std::mem::replace(cc, SmallVec::new())
                    .into_iter()
                    .map(|addr| addr.into())
                    .collect::<SmallVec<[crate::email::Address; 1]>>(),
            );
        }

        if let Some(ref mut bcc) = t.bcc {
            env.set_bcc(
                std::mem::replace(bcc, Vec::new())
                    .into_iter()
                    .map(|addr| addr.into())
                    .collect::<Vec<crate::email::Address>>(),
            );
        }

        if let Some(ref r) = env.references {
            if let Some(pos) = r.refs.iter().position(|r| r == env.message_id()) {
                env.references.as_mut().unwrap().refs.remove(pos);
            }
        }

        env.set_hash(t.id.into_hash());
        env
    }
}

#[derive(Deserialize, Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct HtmlBody {
    pub blob_id: Id<BlobObject>,
    #[serde(default)]
    pub charset: String,
    #[serde(default)]
    pub cid: Option<String>,
    #[serde(default)]
    pub disposition: Option<String>,
    #[serde(default)]
    pub headers: Value,
    #[serde(default)]
    pub language: Option<Vec<String>>,
    #[serde(default)]
    pub location: Option<String>,
    #[serde(default)]
    pub name: Option<String>,
    #[serde(default)]
    pub part_id: Option<String>,
    pub size: u64,
    #[serde(alias = "type")]
    pub content_type: String,
    #[serde(default)]
    pub sub_parts: Vec<Value>,
}

#[derive(Deserialize, Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct TextBody {
    pub blob_id: Id<BlobObject>,
    #[serde(default)]
    pub charset: String,
    #[serde(default)]
    pub cid: Option<String>,
    #[serde(default)]
    pub disposition: Option<String>,
    #[serde(default)]
    pub headers: Value,
    #[serde(default)]
    pub language: Option<Vec<String>>,
    #[serde(default)]
    pub location: Option<String>,
    #[serde(default)]
    pub name: Option<String>,
    #[serde(default)]
    pub part_id: Option<String>,
    pub size: u64,
    #[serde(alias = "type")]
    pub content_type: String,
    #[serde(default)]
    pub sub_parts: Vec<Value>,
}

impl Object for EmailObject {
    const NAME: &'static str = "Email";
}

#[derive(Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct EmailQuery {
    #[serde(flatten)]
    pub query_call: Query<Filter<EmailFilterCondition, EmailObject>, EmailObject>,
    //pub filter: EmailFilterCondition, /* "inMailboxes": [ mailbox.id ] },*/
    pub collapse_threads: bool,
}

impl Method<EmailObject> for EmailQuery {
    const NAME: &'static str = "Email/query";
}

impl EmailQuery {
    pub const RESULT_FIELD_IDS: ResultField<EmailQuery, EmailObject> =
        ResultField::<EmailQuery, EmailObject> {
            field: "/ids",
            _ph: PhantomData,
        };

    pub fn new(query_call: Query<Filter<EmailFilterCondition, EmailObject>, EmailObject>) -> Self {
        EmailQuery {
            query_call,
            collapse_threads: false,
        }
    }

    _impl!(collapse_threads: bool);
}

#[derive(Deserialize, Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct EmailGet {
    #[serde(flatten)]
    pub get_call: Get<EmailObject>,
    #[serde(skip_serializing_if = "Vec::is_empty")]
    pub body_properties: Vec<String>,
    #[serde(default = "bool_false")]
    pub fetch_text_body_values: bool,
    #[serde(default = "bool_false")]
    #[serde(rename = "fetchHTMLBodyValues")]
    pub fetch_html_body_values: bool,
    #[serde(default = "bool_false")]
    pub fetch_all_body_values: bool,
    #[serde(default)]
    #[serde(skip_serializing_if = "u64_zero")]
    pub max_body_value_bytes: u64,
}

impl Method<EmailObject> for EmailGet {
    const NAME: &'static str = "Email/get";
}

impl EmailGet {
    pub fn new(get_call: Get<EmailObject>) -> Self {
        EmailGet {
            get_call,
            body_properties: Vec::new(),
            fetch_text_body_values: false,
            fetch_html_body_values: false,
            fetch_all_body_values: false,
            max_body_value_bytes: 0,
        }
    }

    _impl!(body_properties: Vec<String>);
    _impl!(fetch_text_body_values: bool);
    _impl!(fetch_html_body_values: bool);
    _impl!(fetch_all_body_values: bool);
    _impl!(max_body_value_bytes: u64);
}

#[derive(Serialize, Deserialize, Default, Debug)]
#[serde(rename_all = "camelCase")]
pub struct EmailFilterCondition {
    #[serde(skip_serializing_if = "Option::is_none")]
    pub in_mailbox: Option<Id<MailboxObject>>,
    #[serde(skip_serializing_if = "Vec::is_empty")]
    pub in_mailbox_other_than: Vec<Id<MailboxObject>>,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub before: UtcDate,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub after: UtcDate,
    #[serde(default)]
    #[serde(skip_serializing_if = "Option::is_none")]
    pub min_size: Option<u64>,
    #[serde(default)]
    #[serde(skip_serializing_if = "Option::is_none")]
    pub max_size: Option<u64>,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub all_in_thread_have_keyword: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub some_in_thread_have_keyword: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub none_in_thread_have_keyword: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub has_keyword: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub not_keyword: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub has_attachment: Option<bool>,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub text: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub from: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub to: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub cc: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub bcc: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub subject: String,
    #[serde(skip_serializing_if = "String::is_empty")]
    pub body: String,
    #[serde(skip_serializing_if = "Vec::is_empty")]
    pub header: Vec<Value>,
}

impl EmailFilterCondition {
    pub fn new() -> Self {
        Self::default()
    }

    _impl!(in_mailbox: Option<Id<MailboxObject>>);
    _impl!(in_mailbox_other_than: Vec<Id<MailboxObject>>);
    _impl!(before: UtcDate);
    _impl!(after: UtcDate);
    _impl!(min_size: Option<u64>);
    _impl!(max_size: Option<u64>);
    _impl!(all_in_thread_have_keyword: String);
    _impl!(some_in_thread_have_keyword: String);
    _impl!(none_in_thread_have_keyword: String);
    _impl!(has_keyword: String);
    _impl!(not_keyword: String);
    _impl!(has_attachment: Option<bool>);
    _impl!(text: String);
    _impl!(from: String);
    _impl!(to: String);
    _impl!(cc: String);
    _impl!(bcc: String);
    _impl!(subject: String);
    _impl!(body: String);
    _impl!(header: Vec<Value>);
}

impl FilterTrait<EmailObject> for EmailFilterCondition {}

impl From<EmailFilterCondition> for FilterCondition<EmailFilterCondition, EmailObject> {
    fn from(val: EmailFilterCondition) -> FilterCondition<EmailFilterCondition, EmailObject> {
        FilterCondition {
            cond: val,
            _ph: PhantomData,
        }
    }
}

#[derive(Deserialize, Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub enum MessageProperty {
    ThreadId,
    MailboxIds,
    Keywords,
    Size,
    ReceivedAt,
    IsUnread,
    IsFlagged,
    IsAnswered,
    IsDraft,
    HasAttachment,
    From,
    To,
    Cc,
    Bcc,
    ReplyTo,
    Subject,
    SentAt,
    Preview,
    Id,
    BlobId,
    MessageId,
    InReplyTo,
    Sender,
}

impl From<crate::search::Query> for Filter<EmailFilterCondition, EmailObject> {
    fn from(val: crate::search::Query) -> Self {
        let mut ret = Filter::Condition(EmailFilterCondition::new().into());
        fn rec(q: &crate::search::Query, f: &mut Filter<EmailFilterCondition, EmailObject>) {
            use crate::search::Query::*;
            match q {
                Subject(t) => {
                    *f = Filter::Condition(EmailFilterCondition::new().subject(t.clone()).into());
                }
                From(t) => {
                    *f = Filter::Condition(EmailFilterCondition::new().from(t.clone()).into());
                }
                To(t) => {
                    *f = Filter::Condition(EmailFilterCondition::new().to(t.clone()).into());
                }
                Cc(t) => {
                    *f = Filter::Condition(EmailFilterCondition::new().cc(t.clone()).into());
                }
                Bcc(t) => {
                    *f = Filter::Condition(EmailFilterCondition::new().bcc(t.clone()).into());
                }
                AllText(t) => {
                    *f = Filter::Condition(EmailFilterCondition::new().text(t.clone()).into());
                }
                Body(t) => {
                    *f = Filter::Condition(EmailFilterCondition::new().body(t.clone()).into());
                }
                Before(_) => {
                    //TODO, convert UNIX timestamp into UtcDate
                }
                After(_) => {
                    //TODO
                }
                Between(_, _) => {
                    //TODO
                }
                On(_) => {
                    //TODO
                }
                InReplyTo(_) => {
                    //TODO, look inside Headers
                }
                References(_) => {
                    //TODO
                }
                AllAddresses(_) => {
                    //TODO
                }
                Flags(v) => {
                    fn flag_to_filter(f: &str) -> Filter<EmailFilterCondition, EmailObject> {
                        match f {
                            "draft" => Filter::Condition(
                                EmailFilterCondition::new()
                                    .has_keyword("$draft".to_string())
                                    .into(),
                            ),
                            "flagged" => Filter::Condition(
                                EmailFilterCondition::new()
                                    .has_keyword("$flagged".to_string())
                                    .into(),
                            ),
                            "seen" | "read" => Filter::Condition(
                                EmailFilterCondition::new()
                                    .has_keyword("$seen".to_string())
                                    .into(),
                            ),
                            "unseen" | "unread" => Filter::Condition(
                                EmailFilterCondition::new()
                                    .not_keyword("$seen".to_string())
                                    .into(),
                            ),
                            "answered" => Filter::Condition(
                                EmailFilterCondition::new()
                                    .has_keyword("$answered".to_string())
                                    .into(),
                            ),
                            "unanswered" => Filter::Condition(
                                EmailFilterCondition::new()
                                    .not_keyword("$answered".to_string())
                                    .into(),
                            ),
                            keyword => Filter::Condition(
                                EmailFilterCondition::new()
                                    .not_keyword(keyword.to_string())
                                    .into(),
                            ),
                        }
                    }
                    let mut accum = if let Some(first) = v.first() {
                        flag_to_filter(first.as_str())
                    } else {
                        Filter::Condition(EmailFilterCondition::new().into())
                    };
                    for f in v.iter().skip(1) {
                        accum &= flag_to_filter(f.as_str());
                    }
                    *f = accum;
                }
                HasAttachment => {
                    *f = Filter::Condition(
                        EmailFilterCondition::new()
                            .has_attachment(Some(true))
                            .into(),
                    );
                }
                And(q1, q2) => {
                    let mut rhs = Filter::Condition(EmailFilterCondition::new().into());
                    let mut lhs = Filter::Condition(EmailFilterCondition::new().into());
                    rec(q1, &mut rhs);
                    rec(q2, &mut lhs);
                    rhs &= lhs;
                    *f = rhs;
                }
                Or(q1, q2) => {
                    let mut rhs = Filter::Condition(EmailFilterCondition::new().into());
                    let mut lhs = Filter::Condition(EmailFilterCondition::new().into());
                    rec(q1, &mut rhs);
                    rec(q2, &mut lhs);
                    rhs |= lhs;
                    *f = rhs;
                }
                Not(q) => {
                    let mut qhs = Filter::Condition(EmailFilterCondition::new().into());
                    rec(q, &mut qhs);
                    *f = !qhs;
                }
            }
        }
        rec(&val, &mut ret);
        ret
    }
}

#[test]
fn test_jmap_query() {
    use std::sync::{Arc, Mutex};
    let q: crate::search::Query = crate::search::Query::try_from(
        "subject:wah or (from:Manos and (subject:foo or subject:bar))",
    )
    .unwrap();
    let f: Filter<EmailFilterCondition, EmailObject> = Filter::from(q);
    assert_eq!(
        r#"{"operator":"OR","conditions":[{"subject":"wah"},{"operator":"AND","conditions":[{"from":"Manos"},{"operator":"OR","conditions":[{"subject":"foo"},{"subject":"bar"}]}]}]}"#,
        serde_json::to_string(&f).unwrap().as_str()
    );
    let filter = {
        let mailbox_id = "mailbox_id".to_string();

        let mut r = Filter::Condition(
            EmailFilterCondition::new()
                .in_mailbox(Some(mailbox_id.into()))
                .into(),
        );
        r &= f;
        r
    };

    let email_call: EmailQuery = EmailQuery::new(
        Query::new()
            .account_id("account_id".to_string().into())
            .filter(Some(filter))
            .position(0),
    )
    .collapse_threads(false);

    let request_no = Arc::new(Mutex::new(0));
    let mut req = Request::new(request_no.clone());
    req.add_call(&email_call);

    assert_eq!(
        r#"{"using":["urn:ietf:params:jmap:core","urn:ietf:params:jmap:mail"],"methodCalls":[["Email/query",{"accountId":"account_id","calculateTotal":false,"collapseThreads":false,"filter":{"conditions":[{"inMailbox":"mailbox_id"},{"conditions":[{"subject":"wah"},{"conditions":[{"from":"Manos"},{"conditions":[{"subject":"foo"},{"subject":"bar"}],"operator":"OR"}],"operator":"AND"}],"operator":"OR"}],"operator":"AND"},"position":0,"sort":null},"m0"]]}"#,
        serde_json::to_string(&req).unwrap().as_str()
    );
    assert_eq!(*request_no.lock().unwrap(), 1);
}

#[derive(Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct EmailSet {
    #[serde(flatten)]
    pub set_call: Set<EmailObject>,
}

impl Method<EmailObject> for EmailSet {
    const NAME: &'static str = "Email/set";
}

impl EmailSet {
    pub fn new(set_call: Set<EmailObject>) -> Self {
        EmailSet { set_call }
    }
}

#[derive(Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct EmailChanges {
    #[serde(flatten)]
    pub changes_call: Changes<EmailObject>,
}

impl Method<EmailObject> for EmailChanges {
    const NAME: &'static str = "Email/changes";
}

impl EmailChanges {
    pub fn new(changes_call: Changes<EmailObject>) -> Self {
        EmailChanges { changes_call }
    }
}

#[derive(Serialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct EmailQueryChanges {
    #[serde(flatten)]
    pub query_changes_call: QueryChanges<Filter<EmailFilterCondition, EmailObject>, EmailObject>,
}

impl Method<EmailObject> for EmailQueryChanges {
    const NAME: &'static str = "Email/queryChanges";
}

impl EmailQueryChanges {
    pub fn new(
        query_changes_call: QueryChanges<Filter<EmailFilterCondition, EmailObject>, EmailObject>,
    ) -> Self {
        EmailQueryChanges { query_changes_call }
    }
}

#[derive(Deserialize, Serialize, Debug)]
pub struct EmailQueryChangesResponse {
    ///o  The "collapseThreads" argument that was used with "Email/query".
    #[serde(default = "bool_false")]
    pub collapse_threads: bool,
    #[serde(flatten)]
    pub query_changes_response: QueryChangesResponse<EmailObject>,
}

impl std::convert::TryFrom<&RawValue> for EmailQueryChangesResponse {
    type Error = crate::error::MeliError;
    fn try_from(t: &RawValue) -> Result<EmailQueryChangesResponse> {
        let res: (String, EmailQueryChangesResponse, String) = serde_json::from_str(t.get())?;
        assert_eq!(&res.0, "Email/queryChanges");
        Ok(res.1)
    }
}