extends RefCounted
class_name EconomyApiClient
## Helper class for AGP Economy REST endpoints (Wallet, Payments, Marketplace, Payouts).
##
## docs/planning/economy.md US-6 (task cc09c1428892).

static func get_api_client(node: Node) -> Node:
	if node.has_node("/root/ApiClient"):
		return node.get_node("/root/ApiClient")
	return null

static func generate_idempotency_key() -> String:
	return "%d-%d" % [Time.get_unix_time_from_system(), randi() % 1000000]

# ── Wallet & Currency ──

static func get_wallet(api: Node) -> Dictionary:
	return await api.request(HTTPClient.METHOD_GET, "/api/wallet", "", "application/json", true)

static func get_wallet_transactions(api: Node, limit: int = 50, offset: int = 0) -> Dictionary:
	return await api.request(HTTPClient.METHOD_GET, "/api/wallet/transactions?limit=%d&offset=%d" % [limit, offset], "", "application/json", true)

# ── Premium Purchases ──

static func purchase_credits(api: Node, credits: int, idempotency_key: String = "") -> Dictionary:
	var custom_headers := PackedStringArray()
	var key := idempotency_key if idempotency_key != "" else generate_idempotency_key()
	custom_headers.append("Idempotency-Key: " + key)

	var sess_res: Dictionary = await api.request(
		HTTPClient.METHOD_POST,
		"/api/payments/purchase",
		JSON.stringify({"credits": credits}),
		"application/json",
		true,
		custom_headers
	)
	if not sess_res.ok:
		return sess_res

	var sess_id: String = str(sess_res.data.get("session_id", ""))
	if sess_id == "":
		return {"ok": false, "status": 0, "data": null, "detail": "Invalid session returned"}

	return await api.request(
		HTTPClient.METHOD_POST,
		"/api/payments/confirm",
		JSON.stringify({"session_id": sess_id}),
		"application/json",
		true
	)

# ── Catalog Items & Listings ──

static func get_catalog_items(api: Node, mine: bool = false, item_type: String = "", limit: int = 50, offset: int = 0) -> Dictionary:
	var q := "/api/marketplace/items?limit=%d&offset=%d" % [limit, offset]
	if mine:
		q += "&mine=true"
	if item_type != "":
		q += "&item_type=" + item_type.uri_encode()
	return await api.request(HTTPClient.METHOD_GET, q, "", "application/json", true)

static func create_catalog_item(api: Node, name: String, item_type: String, description: String = "", metadata_json: Dictionary = {}) -> Dictionary:
	var payload := {
		"name": name,
		"item_type": item_type,
		"description": description,
		"metadata_json": metadata_json
	}
	return await api.request(HTTPClient.METHOD_POST, "/api/marketplace/items", JSON.stringify(payload), "application/json", true)

static func create_listing(api: Node, catalog_item_id: int, price: int) -> Dictionary:
	var payload := {
		"catalog_item_id": catalog_item_id,
		"price": price
	}
	return await api.request(HTTPClient.METHOD_POST, "/api/marketplace/listings", JSON.stringify(payload), "application/json", true)

static func search_listings(api: Node, query: String = "", item_type: String = "", min_price: int = -1, max_price: int = -1, limit: int = 50, offset: int = 0) -> Dictionary:
	var q := "/api/marketplace/listings?limit=%d&offset=%d" % [limit, offset]
	if query != "":
		q += "&q=" + query.uri_encode()
	if item_type != "":
		q += "&item_type=" + item_type.uri_encode()
	if min_price >= 0:
		q += "&min_price=%d" % min_price
	if max_price >= 0:
		q += "&max_price=%d" % max_price
	return await api.request(HTTPClient.METHOD_GET, q, "", "application/json", false)

static func get_listing(api: Node, listing_id: int) -> Dictionary:
	return await api.request(HTTPClient.METHOD_GET, "/api/marketplace/listings/%d" % listing_id, "", "application/json", false)

static func update_listing(api: Node, listing_id: int, price: int = -1, status: String = "") -> Dictionary:
	var payload := {}
	if price > 0:
		payload["price"] = price
	if status != "":
		payload["status"] = status
	return await api.request(HTTPClient.METHOD_PATCH, "/api/marketplace/listings/%d" % listing_id, JSON.stringify(payload), "application/json", true)

static func delist_listing(api: Node, listing_id: int) -> Dictionary:
	return await api.request(HTTPClient.METHOD_DELETE, "/api/marketplace/listings/%d" % listing_id, "", "application/json", true)

# ── Purchases & Escrow ──

static func purchase_listing(api: Node, listing_id: int, idempotency_key: String = "") -> Dictionary:
	var custom_headers := PackedStringArray()
	var key := idempotency_key if idempotency_key != "" else generate_idempotency_key()
	custom_headers.append("Idempotency-Key: " + key)

	return await api.request(
		HTTPClient.METHOD_POST,
		"/api/marketplace/listings/%d/purchase" % listing_id,
		"",
		"application/json",
		true,
		custom_headers
	)

static func get_purchases(api: Node, role: String = "all", limit: int = 50, offset: int = 0) -> Dictionary:
	return await api.request(
		HTTPClient.METHOD_GET,
		"/api/marketplace/purchases?role=%s&limit=%d&offset=%d" % [role.uri_encode(), limit, offset],
		"",
		"application/json",
		true
	)

# ── Creator Balances & Payouts ──

static func get_creator_balance(api: Node) -> Dictionary:
	return await api.request(HTTPClient.METHOD_GET, "/api/marketplace/creator/balance", "", "application/json", true)

static func request_payout(api: Node, amount: int, external_ref: String = "") -> Dictionary:
	var payload := {"amount": amount}
	if external_ref != "":
		payload["external_ref"] = external_ref
	return await api.request(HTTPClient.METHOD_POST, "/api/payouts", JSON.stringify(payload), "application/json", true)

static func get_payouts(api: Node, limit: int = 50, offset: int = 0) -> Dictionary:
	return await api.request(HTTPClient.METHOD_GET, "/api/payouts?limit=%d&offset=%d" % [limit, offset], "", "application/json", true)