//! Podnapisi provider tests. Everything runs against `wiremock` — the live
//! service is never touched (DESIGN.md §15).

// Same per-target quirk as the crate's own tests: an integration test links
// the library's dependencies without using them all directly.
use {
    arr_parse as _, reqwest as _, serde as _, serde_json as _, thiserror as _, tracing as _,
    zip as _,
};

use std::time::Duration;

use arr_core::Language;
use arr_subs::{
    Candidate, Error, Fetched, MediaFile, MediaRef, PodnapisiProvider, Provider, SearchRequest,
    SubtitleFormat,
};
use wiremock::matchers::{method, path, query_param, query_param_is_missing};
use wiremock::{Mock, MockServer, ResponseTemplate};

const SEARCH_MOVIE_PAGE1: &str = include_str!("fixtures/search_movie_page1.json");
const SEARCH_MOVIE_PAGE2: &str = include_str!("fixtures/search_movie_page2.json");
const SEARCH_EPISODE: &str = include_str!("fixtures/search_episode.json");
const SEARCH_MALFORMED: &str = include_str!("fixtures/search_malformed.json");
const DOWNLOAD_ZIP: &[u8] = include_bytes!("fixtures/download.zip");
const DOWNLOAD_MULTI_ZIP: &[u8] = include_bytes!("fixtures/download_multi.zip");

fn provider(server: &MockServer) -> PodnapisiProvider {
    PodnapisiProvider::builder()
        .base_url(format!("{}/subtitles", server.uri()))
        .build()
        .expect("provider builds")
}

fn movie_file(release_name: Option<&str>) -> MediaFile {
    MediaFile {
        path: "/mnt/media/film.mkv".into(),
        size: 1_234,
        release_name: release_name.map(str::to_owned),
        media: MediaRef::Movie { tmdb_id: 42 },
    }
}

fn request(file: MediaFile, languages: Vec<Language>) -> SearchRequest {
    SearchRequest { file, languages }
}

async fn mount_search(server: &MockServer, page: Option<&str>, body: &str) {
    let given = Mock::given(method("GET")).and(path("/subtitles/search/advanced"));
    let given = match page {
        Some(page) => given.and(query_param("page", page)),
        None => given.and(query_param_is_missing("page")),
    };
    given
        .respond_with(ResponseTemplate::new(200).set_body_string(body))
        .mount(server)
        .await;
}

#[tokio::test]
async fn a_provider_with_no_release_name_searches_nothing() {
    // No mock is mounted: a request would fail the test if one were sent.
    let server = MockServer::start().await;
    let request = request(movie_file(None), vec![Language::Other("en".to_owned())]);

    let candidates = provider(&server)
        .search(&request)
        .await
        .expect("nothing to search on is not an error");

    assert!(candidates.is_empty());
}

#[tokio::test]
async fn search_paginates_and_dedupes_across_pages() {
    let server = MockServer::start().await;
    mount_search(&server, None, SEARCH_MOVIE_PAGE1).await;
    mount_search(&server, Some("2"), SEARCH_MOVIE_PAGE2).await;

    let request = request(
        movie_file(Some("Movie.2024.1080p.WEB-DL-GROUP")),
        vec![Language::PortugueseBrazil],
    );

    let candidates = provider(&server)
        .search(&request)
        .await
        .expect("search succeeds");

    // Three distinct pids across the two pages; "aaa111" repeats on both and
    // must survive only once (DESIGN.md's provider forum note on duplicates).
    assert_eq!(candidates.len(), 3);
    assert!(candidates.iter().all(|candidate| !candidate.hash_match));
}

#[tokio::test]
async fn a_candidate_carries_the_release_name_group_and_source() {
    let server = MockServer::start().await;
    mount_search(&server, None, SEARCH_MOVIE_PAGE1).await;
    mount_search(&server, Some("2"), SEARCH_MOVIE_PAGE2).await;

    let request = request(
        movie_file(Some("Movie.2024.1080p.WEB-DL-GROUP")),
        vec![Language::PortugueseBrazil],
    );

    let candidates = provider(&server)
        .search(&request)
        .await
        .expect("search succeeds");

    let hearing_impaired = candidates
        .iter()
        .find(|candidate| candidate.sdh)
        .expect("one candidate is flagged hearing_impaired");
    assert_eq!(
        hearing_impaired.release_name.as_deref(),
        Some("Movie.2024.1080p.WEB-DL-GROUP")
    );
    assert_eq!(hearing_impaired.group.as_deref(), Some("GROUP"));
    assert_eq!(hearing_impaired.language, Language::PortugueseBrazil);
    assert!(!hearing_impaired.forced);

    let plain = candidates
        .iter()
        .find(|candidate: &&Candidate| {
            !candidate.sdh && candidate.language == Language::PortuguesePortugal
        })
        .expect("the pt-PT candidate from page two");
    assert_eq!(plain.group.as_deref(), Some("OTHERGRP"));
}

#[tokio::test]
async fn episode_media_sends_season_and_episode_params() {
    let server = MockServer::start().await;
    Mock::given(method("GET"))
        .and(path("/subtitles/search/advanced"))
        .and(query_param("seasons", "1"))
        .and(query_param("episodes", "2"))
        .respond_with(ResponseTemplate::new(200).set_body_string(SEARCH_EPISODE))
        .mount(&server)
        .await;

    let file = MediaFile {
        path: "/mnt/media/show/s01e02.mkv".into(),
        size: 999,
        release_name: Some("Show.S01E02.1080p.WEB-DL-TEAM".to_owned()),
        media: MediaRef::Episode {
            tmdb_id: 7,
            season: 1,
            episode: 2,
        },
    };
    let request = request(file, vec![Language::Other("en".to_owned())]);

    let candidates = provider(&server)
        .search(&request)
        .await
        .expect("search succeeds");

    assert_eq!(candidates.len(), 1);
    assert_eq!(candidates[0].language, Language::Other("en".to_owned()));
}

#[tokio::test]
async fn a_401_is_unauthorized() {
    let server = MockServer::start().await;
    Mock::given(method("GET"))
        .and(path("/subtitles/search/advanced"))
        .respond_with(ResponseTemplate::new(401))
        .mount(&server)
        .await;

    let request = request(
        movie_file(Some("Movie.2024")),
        vec![Language::Other("en".to_owned())],
    );

    let error = provider(&server)
        .search(&request)
        .await
        .expect_err("401 is an error");

    assert!(matches!(error, Error::Unauthorized { .. }), "got {error:?}");
}

#[tokio::test]
async fn a_429_surfaces_retry_after() {
    let server = MockServer::start().await;
    Mock::given(method("GET"))
        .and(path("/subtitles/search/advanced"))
        .respond_with(ResponseTemplate::new(429).insert_header("retry-after", "13"))
        .mount(&server)
        .await;

    let request = request(
        movie_file(Some("Movie.2024")),
        vec![Language::Other("en".to_owned())],
    );

    let error = provider(&server)
        .search(&request)
        .await
        .expect_err("429 is an error");

    match error {
        Error::RateLimited { retry_after, .. } => {
            assert_eq!(retry_after, Some(Duration::from_secs(13)));
        }
        other => panic!("expected RateLimited, got {other:?}"),
    }
}

#[tokio::test]
async fn a_response_that_does_not_parse_is_malformed() {
    let server = MockServer::start().await;
    mount_search(&server, None, SEARCH_MALFORMED).await;

    let request = request(
        movie_file(Some("Movie.2024")),
        vec![Language::Other("en".to_owned())],
    );

    let error = provider(&server)
        .search(&request)
        .await
        .expect_err("an unparseable body is an error");

    assert!(matches!(error, Error::Malformed { .. }), "got {error:?}");
}

#[tokio::test]
async fn download_extracts_the_single_zipped_file() {
    let server = MockServer::start().await;
    Mock::given(method("GET"))
        .and(path("/subtitles/aaa111/download"))
        .and(query_param("container", "zip"))
        .respond_with(ResponseTemplate::new(200).set_body_bytes(DOWNLOAD_ZIP))
        .mount(&server)
        .await;

    let id = arr_subs::CandidateId::new("aaa111|pt-BR");
    let fetched: Fetched = provider(&server)
        .download(&id)
        .await
        .expect("download succeeds");

    assert_eq!(fetched.id, id);
    assert_eq!(fetched.language, Language::PortugueseBrazil);
    assert_eq!(fetched.format, SubtitleFormat::Srt);
    assert!(fetched.content.starts_with(b"1\n00:00:01"));
}

#[tokio::test]
async fn a_zip_with_more_than_one_file_is_malformed() {
    let server = MockServer::start().await;
    Mock::given(method("GET"))
        .and(path("/subtitles/bbb222/download"))
        .respond_with(ResponseTemplate::new(200).set_body_bytes(DOWNLOAD_MULTI_ZIP))
        .mount(&server)
        .await;

    let id = arr_subs::CandidateId::new("bbb222|en");
    let error = provider(&server)
        .download(&id)
        .await
        .expect_err("more than one file in the zip is an error");

    assert!(matches!(error, Error::Malformed { .. }), "got {error:?}");
}

#[tokio::test]
async fn an_id_this_provider_never_issued_is_not_found() {
    let server = MockServer::start().await;
    // No mock mounted: a malformed id must fail before any request is sent.
    let id = arr_subs::CandidateId::new("no-language-suffix");

    let error = provider(&server)
        .download(&id)
        .await
        .expect_err("an id without a language suffix is not this provider's");

    assert!(matches!(error, Error::NotFound { .. }), "got {error:?}");
}