use crate::parse::{EmbedRule, Platform};
use crate::Category;

pub struct Googlemaps;

impl Platform for Googlemaps {
    fn id(&self) -> &'static str {
        "googlemaps"
    }

    fn name(&self) -> &'static str {
        "Google Maps"
    }

    fn category(&self) -> Category {
        Category::Dev
    }

    fn domains(&self) -> &'static [&'static str] {
        &["maps.google.com", "google.com", "maps.app.goo.gl"]
    }

    fn embed_rule(&self) -> Option<EmbedRule> {
        // 原实现把整个 URL 塞进 `q=`，生成 `?q=https%3A%2F%2Fmaps.google.com…`
        // 这种自我嵌套的地址。这里只取原 URL 的 `q` 参数，其余形态交给 `parse`。
        Some(EmbedRule::capture(
            r"[?&]q=([^&]+)",
            "https://maps.google.com/maps?q={id}&output=embed",
            crate::Aspect::Wide,
        ))
    }

    /// `/maps/place/<名字>` 与 `/maps/@lat,lng,zoom` 各自取对参数；
    /// `google.com` 只在 `/maps` 路径上认领，否则搜索/邮箱/云盘会被误判成地图。
    fn parse(&self, url: &url::Url) -> Option<crate::Resolved> {
        use crate::parse::{capture_args, default_parse, platform_resolved};
        use crate::EmbedKind;

        let host = url.host_str().unwrap_or_default();
        let host_owned = host.trim_start_matches("www.");
        // `maps.app.goo.gl` 是短链：落地地址由 chat 的重定向跟随补上，
        // 这里先按卡片出，避免把短链本身当坐标。
        let on_map_host = host_owned.starts_with("maps.google.");
        if host_owned.starts_with("maps.app.goo.gl") {
            return Some(platform_resolved(
                self,
                url,
                EmbedKind::Link,
                None,
                crate::Aspect::Auto,
            ));
        }
        if !on_map_host && !url.path().starts_with("/maps") {
            // 非地图路径：让这条链接走普通卡片，别贴 Google Maps 的标签。
            return None;
        }
        if let Some(caps) = capture_args(r"^/maps/place/([^/@]+)", url) {
            let place: String = url::form_urlencoded::byte_serialize(caps[0].as_bytes()).collect();
            return Some(platform_resolved(
                self,
                url,
                EmbedKind::Iframe,
                Some(format!("https://maps.google.com/maps?q={place}&output=embed")),
                crate::Aspect::Wide,
            ));
        }
        if let Some(caps) = capture_args(r"^/maps/@(-?\d+\.\d+),(-?\d+\.\d+)", url) {
            return Some(platform_resolved(
                self,
                url,
                EmbedKind::Iframe,
                Some(format!(
                    "https://maps.google.com/maps?q={},{}&output=embed",
                    caps[0], caps[1]
                )),
                crate::Aspect::Wide,
            ));
        }
        default_parse(self, url)
    }
}

pub static PLATFORM: Googlemaps = Googlemaps;