use diesel::{dsl::*, pg::Pg, result::Error, *};
use serde::{Deserialize, Serialize};

use crate::{limit_and_offset, MaybeOptional, schema::post_report, post::Post, Reportable, naive_now};

table! {
    post_report_view (id) {
        id -> Int4,
        creator_id -> Int4,
        post_id -> Int4,
        post_name -> Varchar,
        post_url -> Nullable<Text>,
        post_body -> Nullable<Text>,
        reason -> Text,
        resolved -> Bool,
        resolver_id -> Nullable<Int4>,
        published -> Timestamp,
        updated -> Nullable<Timestamp>,
        community_id -> Int4,
        creator_name -> Varchar,
        post_creator_id -> Int4,
        post_creator_name -> Varchar,
    }
}

#[derive(Identifiable, Queryable, Associations, PartialEq, Serialize, Deserialize, Debug)]
#[belongs_to(Post)]
#[table_name = "post_report"]
pub struct PostReport {
    pub id: i32,
    pub creator_id: i32,
    pub post_id: i32,
    pub post_name: String,
    pub post_url: Option<String>,
    pub post_body: Option<String>,
    pub reason: String,
    pub resolved: bool,
    pub resolver_id: Option<i32>,
    pub published: chrono::NaiveDateTime,
    pub updated: Option<chrono::NaiveDateTime>,
}

#[derive(Insertable, AsChangeset, Clone)]
#[table_name = "post_report"]
pub struct PostReportForm {
    pub creator_id: i32,
    pub post_id: i32,
    pub post_name: String,
    pub post_url: Option<String>,
    pub post_body: Option<String>,
    pub reason: String,
}

impl Reportable<PostReportForm> for PostReport {
    fn report(conn: &PgConnection, post_report_form: &PostReportForm) -> Result<Self, Error> {
        use crate::schema::post_report::dsl::*;
        insert_into(post_report)
            .values(post_report_form)
            .get_result::<Self>(conn)
    }

    fn resolve(conn: &PgConnection, report_id: i32, by_user_id: i32) -> Result<usize, Error> {
        use crate::schema::post_report::dsl::*;
        update(post_report.find(report_id))
            .set((
                resolved.eq(true),
                resolver_id.eq(by_user_id),
                updated.eq(naive_now()),
            ))
            .execute(conn)
    }

    fn unresolve(conn: &PgConnection, report_id: i32) -> Result<usize, Error> {
        use crate::schema::post_report::dsl::*;
        update(post_report.find(report_id))
            .set((
                resolved.eq(false),
                updated.eq(naive_now()),
            ))
            .execute(conn)
    }
}

#[derive(
Queryable, Identifiable, PartialEq, Debug, Serialize, Deserialize, Clone,
)]
#[table_name = "post_report_view"]
pub struct PostReportView {
    pub id: i32,
    pub creator_id: i32,
    pub post_id: i32,
    pub post_name: String,
    pub post_url: Option<String>,
    pub post_body: Option<String>,
    pub reason: String,
    pub resolved: bool,
    pub resolver_id: Option<i32>,
    pub published: chrono::NaiveDateTime,
    pub updated: Option<chrono::NaiveDateTime>,
    pub community_id: i32,
    pub creator_name: String,
    pub post_creator_id: i32,
    pub post_creator_name: String,
}

impl PostReportView {
    pub fn read(conn: &PgConnection, report_id: i32) -> Result<Self, Error> {
        use super::post_report::post_report_view::dsl::*;
        post_report_view
            .find(report_id)
            .first::<Self>(conn)
    }
}

pub struct PostReportQueryBuilder<'a> {
    conn: &'a PgConnection,
    query: post_report_view::BoxedQuery<'a, Pg>,
    for_community_id: Option<i32>,
    page: Option<i64>,
    limit: Option<i64>,
    resolved: Option<bool>,
}

impl<'a> PostReportQueryBuilder<'a> {
    pub fn create(conn: &'a PgConnection) -> Self {
        use super::post_report::post_report_view::dsl::*;

        let query = post_report_view.into_boxed();

        PostReportQueryBuilder {
            conn,
            query,
            for_community_id: None,
            page: None,
            limit: None,
            resolved: Some(false),
        }
    }

    pub fn community_id<T: MaybeOptional<i32>>(mut self, community_id: T) -> Self {
        self.for_community_id = community_id.get_optional();
        self
    }

    pub fn page<T: MaybeOptional<i64>>(mut self, page: T) -> Self {
        self.page = page.get_optional();
        self
    }

    pub fn limit<T: MaybeOptional<i64>>(mut self, limit: T) -> Self {
        self.limit = limit.get_optional();
        self
    }

    pub fn resolved<T: MaybeOptional<bool>>(mut self, resolved: T) -> Self {
        self.resolved = resolved.get_optional();
        self
    }

    pub fn list(self) -> Result<Vec<PostReportView>, Error> {
        use super::post_report::post_report_view::dsl::*;

        let mut query = self.query;

        if let Some(comm_id) = self.for_community_id {
            query = query.filter(community_id.eq(comm_id));
        }

        if let Some(resolved_flag) = self.resolved {
            query = query.filter(resolved.eq(resolved_flag));
        }

        let (limit, offset) = limit_and_offset(self.page, self.limit);

        query
            .order_by(published.asc())
            .limit(limit)
            .offset(offset)
            .load::<PostReportView>(self.conn)
    }

    pub fn count(self) -> Result<usize, Error> {
        use super::post_report::post_report_view::dsl::*;
        let mut query = self.query;

        if let Some(comm_id) = self.for_community_id {
            query = query.filter(community_id.eq(comm_id));
        }

        if let Some(resolved_flag) = self.resolved {
            query = query.filter(resolved.eq(resolved_flag));
        }

        query.execute(self.conn)
    }
}