"""WR-01~07: Worker 进程测试"""

import sys, os, json, tempfile
from pathlib import Path
from unittest.mock import patch, MagicMock
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))

from web.worker import main as worker_main


def _write_task(tasks_dir, task_id, status="queued", runner="native"):
    data = {
        "id": task_id, "status": status, "runner": runner,
        "copybook": f"/tmp/{task_id}/copybook.cpy",
        "cobol_src": f"/tmp/{task_id}/program.cbl",
        "java_src": f"/tmp/{task_id}/java",
        "mapping": f"/tmp/{task_id}/mapping.yaml",
    }
    (tasks_dir / f"{task_id}.json").write_text(json.dumps(data), encoding="utf-8")


# ── WR-01: No tasks ──

def test_worker_no_tasks():
    """WR-01: 空 tasks/ → 无操作"""
    with tempfile.TemporaryDirectory() as tmp:
        with patch("web.worker.TASKS_DIR", Path(tmp)), \
             patch("web.worker.time") as mock_time:
            mock_time.sleep.side_effect = KeyboardInterrupt
            try:
                worker_main()
            except KeyboardInterrupt:
                pass
            assert True


# ── WR-02: Normal task ──

def test_worker_normal_task():
    """WR-02: queued 任务 → 处理"""
    with tempfile.TemporaryDirectory() as tmp:
        tasks_dir = Path(tmp)
        _write_task(tasks_dir, "t001")
        mock_vr = MagicMock(
            program="T", status="PASS", fields_matched=5, fields_mismatched=0,
            duration_s=0.5, runner="native", field_results=[], debug={},
        )
        with patch("web.worker.TASKS_DIR", tasks_dir), \
             patch("config.Config") as mock_cfg, \
             patch("orchestrator.run_pipeline", return_value=mock_vr), \
             patch("web.worker.time") as mock_time:
            mock_time.sleep.side_effect = KeyboardInterrupt
            mock_cfg.return_value = MagicMock()
            try:
                worker_main()
            except KeyboardInterrupt:
                pass
            assert (tasks_dir / "t001.json").exists()


# ── WR-03: null JSON / empty file ──

def test_worker_null_json():
    """WR-03: null JSON → error 状态写入"""
    with tempfile.TemporaryDirectory() as tmp:
        tasks_dir = Path(tmp)
        (tasks_dir / "n.json").write_text("null")
        with patch("web.worker.TASKS_DIR", tasks_dir), \
             patch("web.worker.time") as mock_time:
            mock_time.sleep.side_effect = KeyboardInterrupt
            try:
                worker_main()
            except KeyboardInterrupt:
                pass
            data = json.loads((tasks_dir / "n.json").read_text(encoding="utf-8"))
            assert data["status"] == "error"


def test_worker_empty_json():
    """WR-03b: 空文件 → error 状态写入"""
    with tempfile.TemporaryDirectory() as tmp:
        tasks_dir = Path(tmp)
        (tasks_dir / "e.json").write_text("")
        with patch("web.worker.TASKS_DIR", tasks_dir), \
             patch("web.worker.time") as mock_time:
            mock_time.sleep.side_effect = KeyboardInterrupt
            try:
                worker_main()
            except KeyboardInterrupt:
                pass
            data = json.loads((tasks_dir / "e.json").read_text(encoding="utf-8"))
            assert data["status"] == "error"


# ── WR-04: Spark without spark-submit ──

def test_worker_spark_no_submit():
    """WR-04: spark 无 spark-submit → worker 内部处理"""
    with tempfile.TemporaryDirectory() as tmp:
        tasks_dir = Path(tmp)
        _write_task(tasks_dir, "s001", runner="spark")
        with patch("web.worker.TASKS_DIR", tasks_dir), \
             patch("config.Config") as mock_cfg, \
             patch("orchestrator.run_pipeline") as mock_run, \
             patch("web.worker.time") as mock_time:
            mock_time.sleep.side_effect = KeyboardInterrupt
            mock_cfg.return_value = MagicMock()
            mock_run.return_value = MagicMock(
                program="S", status="PASS", fields_matched=3, fields_mismatched=0,
                duration_s=0.2, runner="spark", field_results=[], debug={},
            )
            try:
                worker_main()
            except KeyboardInterrupt:
                pass
            assert True


# ── WR-05: Multiple tasks ──

def test_worker_multiple_tasks():
    """WR-05: 2个 queued → 依次处理"""
    with tempfile.TemporaryDirectory() as tmp:
        tasks_dir = Path(tmp)
        _write_task(tasks_dir, "a1")
        _write_task(tasks_dir, "a2")
        mock_vr = MagicMock(
            program="M", status="PASS", fields_matched=4, fields_mismatched=0,
            duration_s=0.1, runner="native", field_results=[], debug={},
        )
        with patch("web.worker.TASKS_DIR", tasks_dir), \
             patch("config.Config") as mock_cfg, \
             patch("orchestrator.run_pipeline", return_value=mock_vr), \
             patch("web.worker.time") as mock_time:
            mock_time.sleep.side_effect = KeyboardInterrupt
            mock_cfg.return_value = MagicMock()
            try:
                worker_main()
            except KeyboardInterrupt:
                pass
            assert True


# ── WR-07: Task state machine ──

def test_task_state_machine():
    """WR-07: 只处理 queued 任务"""
    with tempfile.TemporaryDirectory() as tmp:
        tasks_dir = Path(tmp)
        _write_task(tasks_dir, "rt1", status="running")
        with patch("web.worker.TASKS_DIR", tasks_dir), \
             patch("web.worker.time") as mock_time:
            mock_time.sleep.side_effect = KeyboardInterrupt
            try:
                worker_main()
            except KeyboardInterrupt:
                pass
            data = json.loads((tasks_dir / "rt1.json").read_text(encoding="utf-8"))
            assert data["status"] == "running"