steam-user 0.1.0

//! Inventory services.

use steamid::SteamID;

use crate::{
    client::SteamUser,
    endpoint::steam_endpoint,
    error::SteamUserError,
    types::{ActiveInventory, AppId, ContextId, EconItem, InventoryCursor, InventoryHistoryItem, InventoryHistoryResult, InventoryResponse, PriceOverview, TradePeople},
};

impl SteamUser {
    /// Retrieves the contents of a specific user's inventory.
    ///
    /// This method handles pagination automatically and fetches all items for
    /// the given application and context.
    ///
    /// # Arguments
    ///
    /// * `user_id` - The [`SteamID`] of the inventory owner.
    /// * `appid` - The Steam App ID (e.g., 730 for CS:GO, 440 for TF2).
    /// * `context_id` - The inventory context ID (usually 2).
    ///
    /// # Returns
    ///
    /// Returns a `Vec<EconItem>` containing all items in the specified
    /// inventory.
    #[steam_endpoint(GET, host = Community, path = "/inventory/{user_id}/{app_id}/{context_id}", kind = Read)]
    pub async fn get_user_inventory_contents(&self, user_id: SteamID, appid: AppId, context_id: ContextId) -> Result<Vec<EconItem>, SteamUserError> {
        let path = format!("/inventory/{}/{}/{}", user_id.steam_id64(), appid, context_id);

        let mut items = Vec::new();
        let mut start_assetid = None;

        loop {
            let mut request = self.get_path(&path).query(&[("count", "2000"), ("preserve_bbcode", "1"), ("raw_asset_properties", "1")]);

            if let Some(start) = start_assetid.as_ref() {
                request = request.query(&[("start_assetid", start)]);
            }

            let response: InventoryResponse = request.send().await?.error_for_status()?.json().await?;

            tracing::info!(
                path = %path,
                success = response.success,
                total_count = ?response.total_inventory_count,
                assets = response.assets.len(),
                descriptions = response.descriptions.len(),
                "inventory fetch result",
            );

            if response.success != 1 {
                tracing::warn!(success = response.success, "inventory fetch: Steam returned non-1 success, returning error");
                return Err(SteamUserError::from_eresult(response.success));
            }

            // Build description lookup by classid_instanceid
            let desc_map: std::collections::HashMap<String, std::sync::Arc<crate::types::InventoryDescription>> = response.descriptions.into_iter().map(|d| (format!("{}_{}", d.classid, d.instanceid), std::sync::Arc::new(d))).collect();

            for asset in &response.assets {
                let key = format!("{}_{}", asset.classid, asset.instanceid);
                if let Some(desc) = desc_map.get(&key) {
                    match EconItem::try_from_inventory_data(asset, desc.clone()) {
                        Ok(mut item) => {
                            if let Some(steam_id) = self.steam_id() {
                                item.owner_steam_id = Some(steam_id);
                            }
                            items.push(item);
                        }
                        Err(e) => {
                            tracing::warn!(assetid = %asset.assetid, classid = %asset.classid, error = %e, "skipping malformed inventory asset");
                        }
                    }
                }
            }

            // Check for pagination
            if response.more_items {
                if let Some(last) = response.last_assetid {
                    start_assetid = Some(last);
                    continue;
                }
            }

            break;
        }

        Ok(items)
    }

    /// Retrieves the inventory of the currently authenticated user.
    ///
    /// Convenience method that calls [`Self::get_user_inventory_contents`] for
    /// the current session.
    // delegates to `get_user_inventory_contents` — no #[steam_endpoint]
    #[tracing::instrument(skip(self), fields(app_id = appid.get(), context_id = context_id.get()))]
    pub async fn get_inventory(&self, appid: AppId, context_id: ContextId) -> Result<Vec<EconItem>, SteamUserError> {
        let steam_id = self.steam_id().ok_or(SteamUserError::NotLoggedIn)?;
        self.get_user_inventory_contents(steam_id, appid, context_id).await
    }

    /// Retrieves the authenticated user's inventory in the legacy JSON format
    /// used by the trading UI.
    ///
    /// This format includes the `rgInventory` and `rgDescriptions` structures.
    #[steam_endpoint(GET, host = Community, path = "/my/inventory/json/{app_id}/{context_id}", kind = Read)]
    pub async fn get_inventory_trading(&self, appid: AppId, context_id: ContextId) -> Result<serde_json::Value, SteamUserError> {
        let response: serde_json::Value = self.get_path(format!("/my/inventory/json/{}/{}", appid, context_id)).query(&[("trading", "1")]).send().await?.json().await?;

        if response.get("success").and_then(|v| v.as_bool().or_else(|| v.as_i64().map(|i| i == 1))).unwrap_or(false) {
            let mut enriched = response;
            let steam_id = self.steam_id().map(|id| id.steam_id64().to_string()).unwrap_or_default();
            let context_str = context_id.to_string();

            if let Some(obj) = enriched.as_object_mut() {
                if let Some(rg_inv) = obj.get_mut("rgInventory").and_then(|v| v.as_object_mut()) {
                    for (_, item) in rg_inv {
                        if let Some(item_obj) = item.as_object_mut() {
                            item_obj.insert("steamId".to_string(), serde_json::json!(steam_id));
                            item_obj.insert("contextId".to_string(), serde_json::json!(context_str));
                        }
                    }
                }
                if let Some(rg_desc) = obj.get_mut("rgDescriptions").and_then(|v| v.as_object_mut()) {
                    for (_, desc) in rg_desc {
                        if let Some(desc_obj) = desc.as_object_mut() {
                            desc_obj.insert("steamId".to_string(), serde_json::json!(steam_id));
                            desc_obj.insert("contextId".to_string(), serde_json::json!(context_str));
                        }
                    }
                }
            }
            Ok(enriched)
        } else {
            Err(SteamUserError::MalformedResponse("Failed to fetch trading inventory".into()))
        }
    }

    /// Retrieves current price statistics for a specific market item.
    ///
    /// # Arguments
    ///
    /// * `market_hash_name` - The unique name used on the Steam Community
    ///   Market (e.g., "Clutch Case").
    #[steam_endpoint(GET, host = Community, path = "/market/priceoverview/", kind = Read)]
    pub async fn get_price_overview(&self, appid: AppId, market_hash_name: &str) -> Result<PriceOverview, SteamUserError> {
        let appid_str = appid.to_string();
        let response: PriceOverview = self
            .get_path("/market/priceoverview/")
            .query(&[
                ("appid", &appid_str),
                ("market_hash_name", &market_hash_name.to_string()),
                ("currency", &"15".to_string()), // Default to VNĐ
            ])
            .send()
            .await?
            .json()
            .await?;

        Ok(response)
    }

    /// Normalize trade history description.
    fn normalize_trade_description(description: &str) -> String {
        const DESCRIPTION_LIST: &[&str] = &[
            "You purchased an item on the Community Market.",
            "You listed an item on the Community Market.",
            "You canceled a listing on the Community Market. The item was returned to you.",
            "Crafted",
            "Expired",
            "Earned a new rank and got a drop",
            "Got an item drop",
            "Random item drop",
            "Purchased a gift",
            "Earned by redeeming Steam Points",
            "Earned by completing your Store Discovery Queue",
            "Earned",
            "Traded",
            "Earned due to game play time",
            "Listed on the Steam Community Market",
            "Turned into Gems",
            "Unpacked a booster pack",
            "Purchased with Gems",
            "Unpacked Gems from Sack",
            "Earned by crafting",
            "Used",
            "Unsealed",
            "Earned by sale purchases",
            "Unlocked a container",
            "Purchased from the store",
            "You deleted",
            "Found",
            "Received from the Community Market",
            "Exchanged one or more items for something different",
            "Earned an item due to ownership of another game",
            "Sticker applied",
            "Sticker removed",
            "Subscription/Seasonal Item Grant",
            "Earned from unlocking an achievement",
            "Moved to Storage Unit",
        ];

        if DESCRIPTION_LIST.contains(&description) {
            return description.to_string();
        }

        if description.starts_with("You traded with ") {
            return "You traded with".to_string();
        }
        if description.starts_with("Gift sent to and redeemed by ") {
            return "Gift sent to and redeemed by".to_string();
        }
        if description.starts_with("Your trade with ") && description.ends_with(" was on hold, and the trade has now completed.") {
            return "Your trade with friend was on hold, and the trade has now completed.".to_string();
        }
        if description.starts_with("You listed an item on the Community Market. The listing was placed on hold until") {
            return "You listed an item on the Community Market. The listing was placed on hold until".to_string();
        }
        if description.starts_with("Earned in ") {
            return "Earned in game".to_string();
        }
        if description.starts_with("Refunded a gift because the recipient,") && description.ends_with("declined") {
            return "Refunded a gift because the recipient declined".to_string();
        }
        if description.starts_with("Your held trade with") && description.ends_with("was canceled. The items have been returned to you.") {
            return "Your held trade with person was canceled. The items have been returned to you.".to_string();
        }

        description.to_string()
    }

    /// Retrieves a trading partner's inventory in the legacy trading JSON
    /// format.
    #[steam_endpoint(GET, host = Community, path = "/tradeoffer/new/partnerinventory/", kind = Read)]
    pub async fn get_inventory_trading_partner(&self, appid: AppId, partner: SteamID, context_id: ContextId) -> Result<serde_json::Value, SteamUserError> {
        let appid_str = appid.to_string();
        let partner_str = partner.steam_id64().to_string();
        let context_str = context_id.to_string();

        let response: serde_json::Value = self.get_path("/tradeoffer/new/partnerinventory/").query(&[("partner", partner_str.as_str()), ("appid", appid_str.as_str()), ("contextid", context_str.as_str())]).header("Referer", "https://steamcommunity.com/tradeoffer/").send().await?.json().await?;

        if response.get("success").and_then(|v| v.as_bool().or_else(|| v.as_i64().map(|i| i == 1))).unwrap_or(false) {
            let mut enriched = response;
            let partner_str = partner.steam_id64().to_string();
            let context_str = context_id.to_string();

            if let Some(obj) = enriched.as_object_mut() {
                if let Some(rg_inv) = obj.get_mut("rgInventory").and_then(|v| v.as_object_mut()) {
                    for (_, item) in rg_inv {
                        if let Some(item_obj) = item.as_object_mut() {
                            item_obj.insert("steamId".to_string(), serde_json::json!(partner_str));
                            item_obj.insert("contextId".to_string(), serde_json::json!(context_str));
                        }
                    }
                }
                if let Some(rg_desc) = obj.get_mut("rgDescriptions").and_then(|v| v.as_object_mut()) {
                    for (_, desc) in rg_desc {
                        if let Some(desc_obj) = desc.as_object_mut() {
                            desc_obj.insert("steamId".to_string(), serde_json::json!(partner_str));
                            desc_obj.insert("contextId".to_string(), serde_json::json!(context_str));
                        }
                    }
                }
            }
            Ok(enriched)
        } else {
            Err(SteamUserError::MalformedResponse("Failed to fetch trading partner inventory".into()))
        }
    }

    /// Parses an inventory history date string like "24 Mar, 2023" + "3:49pm"
    /// into a Unix timestamp (UTC seconds). Returns 0 on failure.
    fn parse_inventory_history_date(date_text: &str, time_text: &str) -> u64 {
        use chrono::NaiveDateTime;

        let combined = format!("{} {}", date_text, time_text);
        // Try format: "24 Mar, 2023 3:49pm" (English Steam format)
        if let Ok(dt) = NaiveDateTime::parse_from_str(&combined, "%d %b, %Y %l:%M%P") {
            return u64::try_from(dt.and_utc().timestamp()).unwrap_or(0);
        }
        // Try alternative: "24 Mar, 2023 3:49 pm"
        if let Ok(dt) = NaiveDateTime::parse_from_str(&combined, "%d %b, %Y %l:%M %P") {
            return u64::try_from(dt.and_utc().timestamp()).unwrap_or(0);
        }
        // Try 24h format: "24 Mar, 2023 15:49"
        if let Ok(dt) = NaiveDateTime::parse_from_str(&combined, "%d %b, %Y %H:%M") {
            return u64::try_from(dt.and_utc().timestamp()).unwrap_or(0);
        }
        tracing::warn!(combined = %combined, "failed to parse inventory history date");
        0
    }

    /// Retrieves the inventory history for the authenticated user.
    ///
    /// This includes detailed records of items added or removed via trades,
    /// drops, market actions, etc.
    ///
    /// # Arguments
    ///
    /// * `cursor` - Optional [`InventoryCursor`] for paginated results. Use
    ///   `None` for the first page.
    #[steam_endpoint(GET, host = Community, path = "/my/inventoryhistory/", kind = Read)]
    pub async fn get_inventory_history(&self, cursor: Option<InventoryCursor>) -> Result<InventoryHistoryResult, SteamUserError> {
        let mut query = vec![("ajax", "1"), ("l", "english")];

        let cursor = cursor.unwrap_or_default();
        let cursor_s = cursor.s.to_string();
        let cursor_time_frac = cursor.time_frac.to_string();
        let cursor_time = cursor.time.to_string();

        query.push(("cursor[s]", cursor_s.as_str()));
        query.push(("cursor[time_frac]", cursor_time_frac.as_str()));
        query.push(("cursor[time]", cursor_time.as_str()));

        let response: serde_json::Value = self.get_path("/my/inventoryhistory/").query(&query).send().await?.json().await?;

        if !response.get("success").and_then(|v| v.as_bool().or_else(|| v.as_i64().map(|i| i == 1))).unwrap_or(false) {
            return Err(SteamUserError::MalformedResponse("Failed to fetch inventory history".into()));
        }

        let html = response.get("html").and_then(|v| v.as_str()).unwrap_or("").replace(['\t', '\n', '\r'], "");

        let descriptions = response.get("descriptions").cloned();

        // Extract the pagination cursor up front so the heavy HTML parse can
        // run on the blocking pool without needing `response` afterwards.
        let next_cursor = response.get("cursor").and_then(|v| {
            Some(InventoryCursor {
                time: v.get("time")?.as_u64()?,
                time_frac: u32::try_from(v.get("time_frac")?.as_u64()?).ok()?,
                s: u32::try_from(v.get("s")?.as_u64()?).ok()?,
            })
        });

        let steamid = self.steam_id();

        // Inventory history pages can be several megabytes; the parse + CSS
        // selection is CPU-bound and would block the runtime if run inline.
        let trade_history = tokio::task::spawn_blocking(move || parse_inventory_history_rows(&html, descriptions.as_ref(), steamid)).await.map_err(|e| SteamUserError::Other(format!("inventory-history parse task failed: {e}")))??;

        Ok(InventoryHistoryResult { cursor: next_cursor, trade_history })
    }

    /// Fetches the entire inventory history by automatically iterating through
    /// all pages.
    ///
    /// WARNING: This can make many requests for accounts with extensive
    /// history.
    // paginates `get_inventory_history` — no #[steam_endpoint]
    #[tracing::instrument(skip(self))]
    pub async fn get_full_inventory_history(&self) -> Result<Vec<InventoryHistoryItem>, SteamUserError> {
        let mut trade_history = Vec::new();
        let mut cursor = None;

        loop {
            let result = self.get_inventory_history(cursor).await?;
            trade_history.extend(result.trade_history);

            if result.cursor.is_none() {
                break;
            }
            cursor = result.cursor;
        }

        Ok(trade_history)
    }

    /// Retrieves a list of apps that have items in the authenticated user's
    /// inventory.
    ///
    /// This method parses the user's inventory page to extract information
    /// about which games have items and how many items are in each
    /// inventory.
    ///
    /// # Returns
    ///
    /// Returns a `Vec<ActiveInventory>` containing information about each app
    /// with inventory items, including the app ID, game icon, game name,
    /// and item count.
    #[steam_endpoint(GET, host = Community, path = "/my/inventory", kind = Read)]
    pub async fn get_active_inventories(&self) -> Result<Vec<ActiveInventory>, SteamUserError> {
        let html = self.get_with_manual_redirects("https://steamcommunity.com/my/inventory").await?;

        // Inventory HTML can be large; parse and traverse on the blocking pool.
        tokio::task::spawn_blocking(move || parse_active_inventories(&html)).await.map_err(|e| SteamUserError::Other(format!("active-inventories parse task failed: {e}")))?
    }
}

/// Parses the rows of an inventory-history HTML response into typed
/// [`InventoryHistoryItem`]s. Extracted as a pure synchronous function so the
/// caller can run it on `tokio::task::spawn_blocking`.
fn parse_inventory_history_rows(html: &str, descriptions: Option<&serde_json::Value>, steamid: Option<SteamID>) -> Result<Vec<InventoryHistoryItem>, SteamUserError> {
    use scraper::{Html, Selector};
    let document = Html::parse_document(html);
    let row_selector = Selector::parse(".tradehistoryrow").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let date_selector = Selector::parse(".tradehistory_date").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let timestamp_selector = Selector::parse(".tradehistory_timestamp").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let event_desc_selector = Selector::parse(".tradehistory_event_description").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let link_selector = Selector::parse("a[href]").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let plusminus_selector = Selector::parse(".tradehistory_items_plusminus").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let items_group_selector = Selector::parse(".tradehistory_items").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let item_selector = Selector::parse(".tradehistory_items_group > .history_item").map_err(|e| SteamUserError::Other(e.to_string()))?;

    let mut trade_history = Vec::new();

    for row in document.select(&row_selector) {
        let date_el = row.select(&date_selector).next();
        let timestamp_el = row.select(&timestamp_selector).next();

        let timestamp_text = timestamp_el.map(|e| e.text().collect::<String>().trim().to_string()).unwrap_or_default();

        let date_text = date_el
            .map(|e| {
                let mut text = e.text().collect::<String>();
                if !timestamp_text.is_empty() {
                    text = text.replace(&timestamp_text, "");
                }
                text.trim().to_string()
            })
            .unwrap_or_default();

        let event_desc_el = row.select(&event_desc_selector).next();
        let raw_description = event_desc_el.map(|e| e.text().collect::<String>().trim().to_string()).unwrap_or_default();

        let description = SteamUser::normalize_trade_description(&raw_description);

        let mut trade_people = None;
        if let Some(event_el) = event_desc_el {
            if let Some(link_el) = event_el.select(&link_selector).next() {
                let href = link_el.value().attr("href").unwrap_or("");
                if href.contains("steamcommunity.com/profiles/") || href.contains("steamcommunity.com/id/") {
                    trade_people = Some(TradePeople { name: link_el.text().collect::<String>().trim().to_string(), url: href.to_string() });
                }
            }
        }

        let plusminus = row.select(&plusminus_selector).next().map(|e| e.text().collect::<String>().trim().to_string()).unwrap_or_default();

        let mut trade_history_items = Vec::new();

        for items_el in row.select(&items_group_selector) {
            let item_plusminus = items_el.select(&plusminus_selector).next().map(|e| e.text().collect::<String>().trim().to_string()).unwrap_or_default();

            for item_el in items_el.select(&item_selector) {
                let text = item_el.text().collect::<String>().trim().to_string();
                if text == "You did not receive any items in this trade." {
                    continue;
                }

                let appid = item_el.value().attr("data-appid").unwrap_or("");
                let classid = item_el.value().attr("data-classid").unwrap_or("");
                let instanceid = item_el.value().attr("data-instanceid").unwrap_or("0");
                let context_id = item_el.value().attr("data-contextid").unwrap_or("");

                let mut item_obj = serde_json::json!({
                    "appid": appid,
                    "classid": classid,
                    "instanceid": instanceid,
                    "contextid": context_id,
                    "steamid": steamid,
                    "plusminus": item_plusminus,
                });

                if let Some(descs) = descriptions {
                    if let Some(asset_desc) = descs.get(appid).and_then(|a| a.get(format!("{}_{}", classid, instanceid))) {
                        if let Some(obj) = item_obj.as_object_mut() {
                            if let Some(desc_obj) = asset_desc.as_object() {
                                for (k, v) in desc_obj {
                                    obj.insert(k.clone(), v.clone());
                                }
                            }
                        }
                    }
                }
                trade_history_items.push(item_obj);
            }
        }

        if !trade_history_items.is_empty() {
            let timestamp_str = format!("{} {}", date_text, timestamp_text);
            let timestamp = SteamUser::parse_inventory_history_date(&date_text, &timestamp_text);

            let items_key: String = trade_history_items
                .iter()
                .map(|item| {
                    let classid = item.get("classid").and_then(|v| v.as_str()).unwrap_or("0");
                    let instanceid = item.get("instanceid").and_then(|v| v.as_str()).unwrap_or("0");
                    format!("{}_{}", classid, instanceid)
                })
                .collect::<Vec<_>>()
                .join("|");
            let id_raw = format!("{}_{}_{}_{}", timestamp, description, plusminus, items_key,);
            let id: String = id_raw.chars().filter(|c| c.is_ascii_alphanumeric() || matches!(c, '-' | '+' | '_' | '|')).collect::<String>().to_lowercase();

            trade_history.push(InventoryHistoryItem { id, timestamp, timestamp_str, description, plusminus, trade_history_items, steamid, trade_people });
        }
    }

    Ok(trade_history)
}

/// Parses the `/my/inventory` page and returns the per-app inventory summary.
///
/// Extracted as a pure synchronous function so the caller can dispatch it onto
/// `tokio::task::spawn_blocking`.
fn parse_active_inventories(html: &str) -> Result<Vec<ActiveInventory>, SteamUserError> {
    use scraper::{Html, Selector};
    let document = Html::parse_document(html);

    let games_list_selector = Selector::parse("#games_list_public").map_err(|e| SteamUserError::Other(e.to_string()))?;

    let Some(games_list) = document.select(&games_list_selector).next() else {
        // No games list found - either no inventories or private profile
        return Ok(Vec::new());
    };

    let tab_selector = Selector::parse(".games_list_tabs > .games_list_tab").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let icon_selector = Selector::parse(".item_desc_game_icon img").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let name_selector = Selector::parse(".games_list_tab_name").map_err(|e| SteamUserError::Other(e.to_string()))?;
    let count_selector = Selector::parse(".games_list_tab_number").map_err(|e| SteamUserError::Other(e.to_string()))?;

    let mut inventories = Vec::new();

    for tab in games_list.select(&tab_selector) {
        let game_icon = tab.select(&icon_selector).next().and_then(|el| el.value().attr("src")).map(|s| s.to_string());

        let game_name = tab.select(&name_selector).next().map(|el| el.text().collect::<String>().trim().to_string()).unwrap_or_default();

        let count = tab
            .select(&count_selector)
            .next()
            .map(|el| {
                let text = el.text().collect::<String>();
                let text = text.trim();
                text.trim_start_matches('(').trim_end_matches(')').parse::<u32>().unwrap_or(0)
            })
            .unwrap_or(0);

        let app_id = tab.value().attr("id").and_then(|id| id.strip_prefix("inventory_link_")).and_then(|id| id.parse::<u32>().ok()).unwrap_or(0);

        if app_id > 0 {
            inventories.push(ActiveInventory { app_id, game_icon, game_name, count });
        }
    }

    Ok(inventories)
}