from __future__ import annotations

import json
import unittest

from web.task_progress import project_progress_payloads


def _call(args: dict) -> dict:
    return {
        "role": "assistant",
        "tool_calls": [{
            "function": {
                "name": "task_progress",
                "arguments": json.dumps(args, ensure_ascii=False),
            },
        }],
    }


class TaskProgressProjectionTests(unittest.TestCase):
    def test_latest_full_snapshot_replaces_prior_snapshot(self) -> None:
        steps, seen = project_progress_payloads([
            _call({"steps": [
                {"id": "old", "title": "旧计划", "status": "in_progress"},
            ]}),
            _call({"steps": [
                {"id": "s1", "title": "分析", "status": "completed"},
                {"id": "s2", "title": "实现", "status": "in_progress"},
            ]}),
        ])

        self.assertTrue(seen)
        self.assertEqual([step["id"] for step in steps], ["s1", "s2"])

    def test_legacy_updates_remain_replayable(self) -> None:
        steps, seen = project_progress_payloads([
            _call({"action": "set_plan", "steps": [
                {"id": "s1", "title": "分析", "status": "in_progress"},
                {"id": "s2", "title": "实现", "status": "pending"},
            ]}),
            _call({"action": "update_step", "step": {
                "id": "s2", "status": "completed",
            }}),
        ])

        self.assertTrue(seen)
        self.assertEqual([step["status"] for step in steps], ["completed", "completed"])


if __name__ == "__main__":
    unittest.main()