//! Live read-only smoke: cargo run --locked --example miruro_probe
//! Uses the documented research title and direct Sun provider; no media segments.
use std::{io, time::Duration};

use serde_json::{Map, Value};
use tubular::miruro::Client;

fn invalid(message: &str) -> io::Error {
    io::Error::new(io::ErrorKind::InvalidData, message)
}

fn main() -> io::Result<()> {
    let client = Client::default();
    let results = client.search("apothecary")?;
    let media = results
        .iter()
        .find(|media| media["id"] == "OERe_a0YS4h-DlsBDOeXwX7HOO6316tw")
        .ok_or_else(|| invalid("Research title no longer appears in search"))?;
    let id = media["id"]
        .as_str()
        .ok_or_else(|| invalid("Missing media ID"))?;
    println!("search: {} records; selected Miruro ID {id}", results.len());
    let detail = client.detail(id, "the-apothecary-diaries-season-3")?;
    let number = detail
        .episodes
        .first()
        .and_then(|episode| episode["episode_number"].as_u64())
        .and_then(|number| u32::try_from(number).ok())
        .ok_or_else(|| invalid("No episode metadata available"))?;
    println!(
        "detail: {} episodes; selected episode {number}",
        detail.episodes.len()
    );
    let sources = client.sources(id, number)?;
    let tracks = sources["tracks"]
        .as_array()
        .ok_or_else(|| invalid("Missing tracks"))?;
    let provider = tracks
        .iter()
        .find(|track| track["track"] == "ssub")
        .and_then(|track| track["providers"].as_array())
        .and_then(|providers| {
            providers
                .iter()
                .find(|provider| provider["provider"] == "sun")
        })
        .ok_or_else(|| invalid("Direct Sun soft-subtitle provider not returned"))?;
    let server = provider["servers"]
        .as_array()
        .and_then(|servers| {
            servers.iter().find(|server| {
                server["streams"]
                    .as_array()
                    .is_some_and(|streams| !streams.is_empty())
            })
        })
        .ok_or_else(|| invalid("No direct Sun stream returned"))?;
    let headers = server["headers"]
        .as_object()
        .ok_or_else(|| invalid("Missing server headers"))?;
    println!(
        "sources: {} tracks; selected ssub/sun; {} server headers retained",
        tracks.len(),
        headers.len()
    );
    let agent = ureq::Agent::config_builder()
        .timeout_global(Some(Duration::from_secs(25)))
        .http_status_as_error(false)
        .max_redirects(0)
        .build()
        .new_agent();
    let master = resource(
        &agent,
        "hls_master",
        server["streams"][0]["url"]
            .as_str()
            .ok_or_else(|| invalid("Missing stream URL"))?,
        headers,
    )?;
    if !master.starts_with("#EXTM3U") || !master.contains("#EXT-X-STREAM-INF:") {
        return Err(invalid("Expected an HLS master playlist"));
    }
    let subtitle = provider["subtitles"]
        .as_array()
        .and_then(|subtitles| {
            subtitles
                .iter()
                .find(|subtitle| subtitle["default"] == true)
        })
        .ok_or_else(|| invalid("No default subtitle returned"))?;
    let subtitle = resource(
        &agent,
        "subtitle",
        subtitle["file"]
            .as_str()
            .ok_or_else(|| invalid("Missing subtitle URL"))?,
        headers,
    )?;
    if !subtitle.starts_with("WEBVTT") || !subtitle.contains(" --> ") {
        return Err(invalid("Expected timed VTT subtitles"));
    }
    println!(
        "PASS: native search -> detail/episodes -> sources -> HLS master + subtitle; no media segments or tokens saved"
    );
    Ok(())
}

fn resource(
    agent: &ureq::Agent,
    label: &str,
    url: &str,
    headers: &Map<String, Value>,
) -> io::Result<String> {
    let uri: ureq::http::Uri = url
        .parse()
        .map_err(|_| invalid("Invalid Sun resource URL"))?;
    if uri.scheme_str() != Some("https")
        || !uri.host().is_some_and(|host| host.ends_with(".keeply.top"))
        || uri
            .authority()
            .is_some_and(|authority| authority.as_str().contains('@'))
        || uri.port_u16().is_some_and(|port| port != 443)
    {
        return Err(invalid(
            "Smoke only permits the verified Sun HTTPS CDN; no redirects",
        ));
    }
    let mut request = agent.get(url);
    for (name, value) in headers {
        request = request.header(
            name.as_str(),
            value
                .as_str()
                .ok_or_else(|| invalid("Invalid server header"))?,
        );
    }
    let mut response = request
        .call()
        .map_err(|_| io::Error::other("Sun resource HTTP transport failed"))?;
    let status = response.status().as_u16();
    let mime = response.body().mime_type().unwrap_or("missing");
    println!("{label}: HTTP {status}; Content-Type {mime}");
    let expected = if label == "subtitle" {
        "text/vtt"
    } else {
        "application/vnd.apple.mpegurl"
    };
    if status != 200 || mime != expected {
        return Err(invalid(
            "Resource failed or returned unexpected content; stopping without retry",
        ));
    }
    response
        .body_mut()
        .with_config()
        .limit(2 * 1024 * 1024)
        .read_to_string()
        .map_err(|_| invalid("Resource response unreadable, timed out, or exceeded 2 MiB"))
}