//! DeepSeek usage feed implementation.
//!
//! Mirrors prime-agent:packages/ai/src/utils/usage/providers/deepseek.ts field for field.
const std = @import("std");
const usage = @import("../usage.zig");
pub const DEEPSEEK_USAGE_URL = "https://api.deepseek.com/user/balance";
pub const ParseDeepSeekResult = struct {
planType: ?[]const u8 = null,
limits: []const usage.UsageLimit = &[_]usage.UsageLimit{},
balance: ?[]const u8 = null,
notes: []const []const u8 = &[_][]const u8{},
};
pub fn parseDeepSeekUsage(alloc: std.mem.Allocator, payload: ?std.json.Value) !ParseDeepSeekResult {
const root = usage.asObject(payload);
const infos = if (root) |r| usage.asArray(r.get("balance_infos")) else null;
if (infos == null or infos.?.items.len == 0) return ParseDeepSeekResult{};
const first = usage.asObject(infos.?.items[0]) orelse return ParseDeepSeekResult{};
const total_val = first.get("total_balance");
const total = if (usage.asString(total_val)) |s|
s
else if (usage.asNumber(total_val)) |n|
try std.fmt.allocPrint(alloc, "{d:.2}", .{n})
else
"0.00";
const curr_raw = usage.asString(first.get("currency")) orelse "USD";
const currency = blk: {
const trimmed = std.mem.trim(u8, curr_raw, " \t\r\n");
if (trimmed.len == 0) break :blk "USD";
const upper = try alloc.alloc(u8, trimmed.len);
break :blk std.ascii.upperString(upper, trimmed);
};
const symbol = if (std.mem.eql(u8, currency, "CNY")) "¥" else "$";
const balance = try std.fmt.allocPrint(alloc, "{s}{s} {s}", .{ symbol, total, currency });
var notes = std.ArrayList([]const u8).empty;
const is_available = if (root) |r| r.get("is_available") else null;
if (is_available) |ia| {
switch (ia) {
.bool => |b| if (!b) try notes.append(alloc, "Account is unavailable"),
else => {},
}
}
return ParseDeepSeekResult{
.planType = "Pay-as-you-go",
.limits = &[_]usage.UsageLimit{},
.balance = balance,
.notes = notes.items,
};
}
pub fn advance(
alloc: std.mem.Allocator,
credential_json: []const u8,
responses_json: []const u8,
_now_ms: i64,
) !usage.Outcome {
_ = _now_ms;
const cred_parsed = std.json.parseFromSlice(std.json.Value, alloc, credential_json, .{}) catch {
return .{ .report = .{ .error_message = "invalid credential JSON" } };
};
const cred_root = usage.asObject(cred_parsed.value) orelse {
return .{ .report = .{ .error_message = "invalid credential JSON" } };
};
const kind = usage.asString(cred_root.get("kind")) orelse "";
if (!std.mem.eql(u8, kind, "apiKey")) {
return .{ .report = .{ .error_message = "deepseek needs an apiKey credential" } };
}
const api_key = usage.asString(cred_root.get("apiKey")) orelse "";
const cred_account_id = usage.asString(cred_root.get("accountId"));
const cred_email = usage.asString(cred_root.get("email"));
const resp_parsed = std.json.parseFromSlice(std.json.Value, alloc, responses_json, .{}) catch {
return .{ .report = .{ .error_message = "invalid responses JSON" } };
};
const resp_array = usage.asArray(resp_parsed.value) orelse {
return .{ .report = .{ .error_message = "invalid responses JSON" } };
};
if (resp_array.items.len == 0) {
var headers = std.ArrayList([2][]const u8).empty;
const auth_hdr = try std.fmt.allocPrint(alloc, "Bearer {s}", .{api_key});
try headers.append(alloc, .{ "Authorization", auth_hdr });
try headers.append(alloc, .{ "Accept", "application/json" });
const requests = try alloc.alloc(usage.UsageRequest, 1);
requests[0] = .{
.method = "GET",
.url = DEEPSEEK_USAGE_URL,
.headers = headers.items,
};
return .{ .requests = requests };
}
const first = switch (try usage.parseFirstResponse(alloc, resp_array, "usage body is not JSON")) {
.ok => |f| f,
.err => |msg| return .{ .report = .{ .error_message = msg } },
};
const body_parsed = first.parsed;
const parsed = try parseDeepSeekUsage(alloc, body_parsed.value);
if (parsed.balance == null) {
return .{ .report = .{ .error_message = "response missing balance_infos" } };
}
return .{
.report = .{
.planType = parsed.planType,
.accountId = cred_account_id,
.email = cred_email,
.limits = parsed.limits,
.balance = parsed.balance,
.notes = parsed.notes,
.error_message = null,
},
};
}