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use serde::{Deserialize, Serialize};

use crate::{tag::TagItem, DynastyReaderRoute, DYNASTY_READER_BASE};

/// A configuration to get a [RecentChapter]
#[allow(missing_docs)]
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct RecentChapterConfig {
    pub page_number: u64,
}

impl std::default::Default for RecentChapterConfig {
    fn default() -> Self {
        RecentChapterConfig { page_number: 1 }
    }
}

impl DynastyReaderRoute for RecentChapterConfig {
    fn request_builder(
        &self,
        client: &reqwest::Client,
        url: reqwest::Url,
    ) -> reqwest::RequestBuilder {
        client.get(url).query(&[("page", self.page_number)])
    }

    fn request_url(&self) -> reqwest::Url {
        DYNASTY_READER_BASE.join("chapters/added.json").unwrap()
    }
}

/// A wrapper around Dynasty Reader's recently added chapters
///
/// <https://dynasty-scans.com/chapters/added>
#[allow(missing_docs)]
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
pub struct RecentChapter {
    pub items: Vec<RecentChapterItem>,
    pub page_number: u64,
    pub max_page_number: u64,
}

impl<'de> Deserialize<'de> for RecentChapter {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        #[derive(Deserialize)]
        struct RecentWrapper {
            chapters: Vec<RecentChapterItem>,
            current_page: u64,
            total_pages: u64,
        }

        let wrapper: RecentWrapper = Deserialize::deserialize(deserializer)?;

        let RecentWrapper {
            chapters: items,
            current_page: page_number,
            total_pages: max_page_number,
        } = wrapper;

        Ok(RecentChapter {
            items,
            max_page_number,
            page_number,
        })
    }
}

/// A Dynasty Reader's recently added chapters item
#[allow(missing_docs)]
#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
pub struct RecentChapterItem {
    pub title: String,
    pub series: Option<String>,
    pub permalink: String,
    pub tags: Vec<TagItem>,
}

#[cfg(test)]
mod tests {
    use anyhow::Result;

    use crate::test_utils::tryhard_configs;

    use super::*;

    #[tokio::test]
    #[ignore = "requires internet"]
    async fn response_structure() -> Result<()> {
        let configs = (1..5).map(|page_number| RecentChapterConfig { page_number });

        tryhard_configs(configs, |client, config| client.recent(config)).await?;

        Ok(())
    }
}