import sys
import os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "python"))

from gobridge import gobridge, run
from typing import Iterator


@gobridge
def add(a: int, b: int) -> int:
    return a + b


@gobridge
def range_gen(start: int, stop: int) -> Iterator[int]:
    """流式输出：对应 Go 侧 Invoke[chan int]"""
    for i in range(start, stop):
        yield i


@gobridge
def sum_stream(numbers: Iterator[int]) -> int:
    """流式输入：对应 Go 侧传入 chan int 参数"""
    return sum(numbers)


@gobridge
def double_stream(numbers: Iterator[int]) -> Iterator[int]:
    """双向流：输入每个数，yield 其平方，对应 Go 侧 Invoke[chan int](c, ctx, "double_stream", inputChan)"""
    for n in numbers:
        yield n * n


# ── struct（dict）类型 ──────────────────────────────────────────────────────

@gobridge
def get_user(uid: int) -> dict:
    """普通调用：返回一个 struct（Go 对应 User）"""
    return {"id": uid, "name": f"user_{uid}", "score": uid * 1.5}


@gobridge
def total_score(users: list) -> float:
    """slice 输入：接收 []User，返回总分"""
    return sum(u["score"] for u in users)


@gobridge
def enrich_users(users: list) -> list:
    """slice 输入输出：为每个 user 追加 level 字段"""
    result = []
    for u in users:
        u = dict(u)
        u["level"] = "gold" if u["score"] >= 10 else "silver"
        result.append(u)
    return result


# ── struct/slice 流式组合 ────────────────────────────────────────────────────

@gobridge
def gen_users(count: int) -> Iterator[dict]:
    """流式输出 struct：yield 多个 User，对应 Go 侧 Invoke[chan User]"""
    for i in range(1, count + 1):
        yield {"id": i, "name": f"user_{i}", "score": float(i * 3)}


@gobridge
def process_users(users: Iterator[dict]) -> Iterator[dict]:
    """双向流 struct：输入流式 User，yield 处理后的 User"""
    for u in users:
        yield {"id": u["id"], "name": u["name"].upper(), "score": u["score"] * 2}


run()