use chrono::{TimeZone, Utc};
use log::debug;
use regex::Regex;
use serde::Deserialize;

use crate::context::Context;
use crate::probe::{self, Entry, Probe};

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
struct Data {
    props: Props,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
struct Props {
    page_props: PageProps,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
struct PageProps {
    status_code: Option<u16>,
    phone_data: Option<PhoneData>,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
struct PhoneData {
    alternative_formats: Vec<String>,
    clean_number: String,
    #[serde(default)]
    comments: Vec<Comment>,
    statistics_text: String,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
struct Comment {
    comment: String,
    timestamp: u64,
}

fn from_html(document: &str) -> Result<Entry, ()> {
    let re = Regex::new(r#"<script>__NEXT_DATA__ = (.*?);__NEXT_LOADED_PAGES__"#).unwrap();

    let result = re.captures(&document).ok_or_else(|| {
        debug!("Hitta: failed to find __NEXT_DATA__");
    })?;

    let json = result.get(1).unwrap().as_str();

    /*
    println!(
        "json: {:#?}",
        serde_json::from_str::<serde_json::Value>(&json)
    );
    */

    if let Ok(data) = serde_json::from_str::<Data>(&json) {
        let messages = Vec::new();
        let mut history = Vec::new();
        let mut comments = Vec::new();

        if let Some(phone_data) = data.props.page_props.phone_data {
            history.push(phone_data.statistics_text);

            for comment in phone_data.comments {
                comments.push(probe::Comment {
                    datetime: Utc.timestamp(
                        (comment.timestamp / 1000) as i64,
                        (comment.timestamp % 1000) as u32,
                    ),
                    title: None,
                    message: comment.comment,
                });
            }

            comments.sort_by(|a, b| b.datetime.cmp(&a.datetime));
        }

        Ok(Entry {
            messages,
            history,
            comments,
        })
    } else {
        if let Err(error) = serde_json::from_str::<Data>(&json) {
            debug!("Hitta: failed to deserialize data: {:#?}", error);
        }

        Err(())
    }
}

pub struct Hitta;

impl Probe for Hitta {
    fn uri(&self, number: &str) -> String {
        format!("https://www.hitta.se/vem-ringde/{}", number)
    }

    fn search(&mut self, ctx: &mut Context, number: &str) -> Result<Entry, ()> {
        let body = if let Some(cache) = ctx.cache_get("hitta", &number) {
            String::from_utf8(cache.data).unwrap()
        } else {
            let body = reqwest::get(&self.uri(number)).unwrap().text().unwrap();

            ctx.cache_set("hitta", &number, body.as_bytes())
                .expect("wut?! why not?!");

            body
        };

        from_html(&body)
    }
}

#[cfg(test)]
mod tests {
    use insta::assert_yaml_snapshot_matches;

    use super::*;

    #[test]
    fn test_0104754350() {
        let document = include_str!("../../fixtures/hitta/0104754350.html");

        assert_yaml_snapshot_matches!(from_html(&document), @r###"Ok:
  messages: []
  history:
    - 42 andra har rapporterat detta nummer
  comments:
    - datetime: "2019-01-17T17:29:22Z"
      title: ~
      message: Varmsälj från Folksam
    - datetime: "2018-12-14T13:45:28Z"
      title: ~
      message: Folksam
    - datetime: "2018-11-28T07:30:18Z"
      title: ~
      message: Höglandschskt
    - datetime: "2018-11-20T19:18:09Z"
      title: ~
      message: "Försäljare "
    - datetime: "2018-11-19T17:38:34Z"
      title: ~
      message: mögg från Folksam
    - datetime: "2018-11-12T16:00:41Z"
      title: ~
      message: Folksam försäkringsförsäljare
    - datetime: "2018-10-25T10:28:36Z"
      title: ~
      message: folksam
    - datetime: "2018-10-10T07:30:40Z"
      title: ~
      message: Telefonförsäljare
    - datetime: "2018-10-04T10:04:55Z"
      title: ~
      message: Folksam säljare
    - datetime: "2018-10-03T13:55:19Z"
      title: ~
      message: Sa inget.
    - datetime: "2018-08-24T16:56:46Z"
      title: ~
      message: Folksam
    - datetime: "2018-08-24T09:42:43Z"
      title: ~
      message: Achmati azmut från folksam
    - datetime: "2018-08-21T18:29:29Z"
      title: ~
      message: Folksam
    - datetime: "2018-08-16T18:56:56Z"
      title: ~
      message: Säljare från Folksam.
    - datetime: "2018-08-16T14:48:59Z"
      title: ~
      message: "Folksam "
    - datetime: "2018-08-09T16:30:28Z"
      title: ~
      message: Folksam
    - datetime: "2018-08-02T16:29:32Z"
      title: ~
      message: "Folksam "
    - datetime: "2018-08-02T15:33:38Z"
      title: ~
      message: "Folksam "
    - datetime: "2018-07-25T08:28:27Z"
      title: ~
      message: Säljare Folksam
    - datetime: "2018-07-17T21:20:51Z"
      title: ~
      message: "Inga Hansson "
    - datetime: "2018-07-16T18:11:46Z"
      title: ~
      message: Folksam
    - datetime: "2018-07-06T15:45:46Z"
      title: ~
      message: "Folksam "
    - datetime: "2018-07-05T17:24:07Z"
      title: ~
      message: folksam
    - datetime: "2018-07-05T11:15:02Z"
      title: ~
      message: Vesran
    - datetime: "2018-07-04T13:30:49Z"
      title: ~
      message: Folksam
    - datetime: "2018-06-29T10:52:51Z"
      title: ~
      message: folksam
    - datetime: "2018-06-28T13:33:01Z"
      title: ~
      message: Säljare folksam
    - datetime: "2018-06-28T07:42:42Z"
      title: ~
      message: Folksam försäkringar
    - datetime: "2018-06-26T12:59:33Z"
      title: ~
      message: Säljare Folksam"###);
    }

    #[test]
    fn test_0313908905() {
        let document = include_str!("../../fixtures/hitta/0313908905.html");

        assert_yaml_snapshot_matches!(from_html(&document), @r###"Ok:
  messages: []
  history: []
  comments: []"###);
    }

    #[test]
    fn test_0702269893() {
        let document = include_str!("../../fixtures/hitta/0702269893.html");

        assert_yaml_snapshot_matches!(from_html(&document), @r###"Ok:
  messages: []
  history:
    - Tre andra har också sökt på detta nummer
  comments: []"###);
    }

    #[test]
    fn test_0726443387() {
        let document = include_str!("../../fixtures/hitta/0726443387.html");

        assert_yaml_snapshot_matches!(from_html(&document), @r###"Ok:
  messages: []
  history:
    - 1299 andra har också sökt på detta nummer
  comments: []"###);
    }

    #[test]
    fn test_0751793426() {
        let document = include_str!("../../fixtures/hitta/0751793426.html");

        assert_yaml_snapshot_matches!(from_html(&document), @r###"Ok:
  messages: []
  history: []
  comments: []"###);
    }

    #[test]
    fn test_0751793483() {
        let document = include_str!("../../fixtures/hitta/0751793483.html");

        assert_yaml_snapshot_matches!(from_html(&document), @r###"Ok:
  messages: []
  history: []
  comments: []"###);
    }

    #[test]
    fn test_0751793499() {
        let document = include_str!("../../fixtures/hitta/0751793499.html");

        assert_yaml_snapshot_matches!(from_html(&document), @r###"Ok:
  messages: []
  history: []
  comments: []"###);
    }
}