from pathlib import Path

from typer.testing import CliRunner

from tjwater_agent_cli import core
from tjwater_agent_cli.main import app, main


runner = CliRunner()


class DummyResponse:
    def __init__(self, *, status_code=200, json_data=None, text="", headers=None, content=None):
        self.status_code = status_code
        self._json_data = json_data
        self.text = text
        self.headers = headers or {"content-type": "application/json"}
        self.content = content if content is not None else text.encode("utf-8")

    @property
    def ok(self):
        return 200 <= self.status_code < 300

    def json(self):
        if self._json_data is None:
            raise ValueError("no json")
        return self._json_data


def test_load_auth_context_supports_aliases(tmp_path: Path):
    auth_path = tmp_path / "auth.json"
    auth_path.write_text(
        '{"base_url":"http://server","token":"abc","projectId":"p1","userId":"u1","username":"tester","projectCode":"net1"}',
        encoding="utf-8",
    )

    auth = core.load_auth_context(auth_path)

    assert auth.server == "http://server"
    assert auth.access_token == "abc"
    assert auth.project_id == "p1"
    assert auth.user_id == "u1"
    assert auth.username == "tester"
    assert auth.network == "net1"


def test_build_runtime_context_uses_default_server(monkeypatch):
    monkeypatch.delenv("TJWATER_SERVER", raising=False)
    monkeypatch.delenv("TJWATER_ACCESS_TOKEN", raising=False)
    monkeypatch.delenv("TJWATER_PROJECT_ID", raising=False)
    monkeypatch.delenv("TJWATER_USER_ID", raising=False)
    monkeypatch.delenv("TJWATER_USERNAME", raising=False)
    monkeypatch.delenv("TJWATER_NETWORK", raising=False)
    monkeypatch.delenv("TJWATER_EXTRA_HEADERS", raising=False)

    runtime = core.build_runtime_context(
        server=None,
        auth_context_path=None,
        scheme=None,
        timeout=core.DEFAULT_TIMEOUT,
        request_id="req-1",
    )

    assert runtime.server == core.DEFAULT_SERVER


def test_help_json_lists_commands():
    result = runner.invoke(app, ["help", "--json"])

    assert result.exit_code == 0
    assert '"schema_version": "tjwater-cli/v1"' in result.stdout
    assert '"command": "project"' in result.stdout
    assert '"command": "analysis"' in result.stdout
    assert '"menu_level": 1' in result.stdout
    assert '"command": "project list"' not in result.stdout


def test_help_defaults_to_text():
    result = runner.invoke(app, ["help"])

    assert result.exit_code == 0
    assert "Commands:" in result.stdout
    assert "project: 项目与项目级元数据相关命令。" in result.stdout
    assert "analysis: 分析计算与诊断相关命令。" in result.stdout
    assert "Use `tjwater <menu> help` to see subcommands." in result.stdout
    assert "usage: tjwater project help" not in result.stdout
    assert "example: tjwater project help" not in result.stdout
    assert "project list: 列出当前用户可访问项目" not in result.stdout
    assert '"schema_version": "tjwater-cli/v1"' not in result.stdout


def test_simulation_help_lists_subcommands():
    result = runner.invoke(app, ["simulation", "help"])

    assert result.exit_code == 0
    assert "模拟运行与调度相关命令。" in result.stdout
    assert "simulation run: 触发指定绝对时间的模拟运行" in result.stdout
    assert "usage: tjwater simulation run --start-time <START_TIME> --duration <DURATION>" in result.stdout
    assert "example: tjwater --auth-context auth.json simulation run --start-time 2025-01-02T03:04:05+08:00 --duration 30" in result.stdout


def test_nested_group_help_lists_examples():
    result = runner.invoke(app, ["analysis", "leakage", "help"])

    assert result.exit_code == 0
    assert "漏损分析相关命令。" in result.stdout
    assert "analysis leakage identify: 执行漏损识别" in result.stdout
    assert "example: tjwater --auth-context auth.json analysis leakage identify" in result.stdout


def test_analysis_help_uses_group_summaries_for_nested_groups():
    result = runner.invoke(app, ["analysis", "help"])

    assert result.exit_code == 0
    assert "analysis leakage: 漏损分析相关命令。" in result.stdout
    assert "analysis burst-detection: 爆管检测相关命令。" in result.stdout
    assert "analysis burst-location" not in result.stdout
    assert "analysis risk" not in result.stdout
    assert "analysis leakage: 执行漏损识别" not in result.stdout
    assert "example: tjwater --auth-context auth.json analysis burst --start-time 2025-01-02T03:04:05+08:00 --duration 30 --burst-file ./burst.json --scheme burst_case_01" in result.stdout
    assert "example: tjwater --auth-context auth.json analysis valve --mode close --start-time 2025-01-02T03:04:05+08:00 --valve V1 --duration 900" in result.stdout


def test_bare_analysis_uses_typer_help_with_descriptions():
    result = runner.invoke(app, ["analysis"])

    assert result.exit_code == 2
    assert "分析计算与诊断相关命令。" in result.stdout
    assert "burst              执行爆管分析" in result.stdout
    assert "valve              执行阀门关闭或隔离分析" in result.stdout
    assert "leakage            漏损分析相关命令。" in result.stdout
    assert "burst-location" not in result.stdout
    assert "risk" not in result.stdout


def test_leaf_help_shows_usage_and_example():
    result = runner.invoke(app, ["help", "simulation", "run"])

    assert result.exit_code == 0
    assert "Command: simulation run" in result.stdout
    assert "结果需后续通过 data timeseries 在对应时间段查询" in result.stdout
    assert "Usage: tjwater simulation run --start-time <START_TIME> --duration <DURATION>" in result.stdout
    assert "Examples:" in result.stdout
    assert "tjwater --auth-context auth.json simulation run --start-time 2025-01-02T03:04:05+08:00 --duration 30" in result.stdout


def test_project_help_uses_legal_kind_example():
    result = runner.invoke(app, ["project", "help"])

    assert result.exit_code == 0
    assert "example: tjwater --auth-context auth.json project data --kind scada-info" in result.stdout
    assert "--kind time" not in result.stdout


def test_analysis_burst_returns_next_step_to_fetch_scheme(monkeypatch, tmp_path: Path):
    auth_path = tmp_path / "auth.json"
    auth_path.write_text(
        '{"server":"http://server","access_token":"abc","network":"demo"}',
        encoding="utf-8",
    )
    burst_path = tmp_path / "burst.json"
    burst_path.write_text('[{"id":"P1","size":3.5}]', encoding="utf-8")

    def fake_request(**kwargs):
        return DummyResponse(text="success", headers={"content-type": "text/plain"})

    monkeypatch.setattr(core.requests, "request", fake_request)

    result = runner.invoke(
        app,
        [
            "--auth-context",
            str(auth_path),
            "analysis",
            "burst",
            "--start-time",
            "2025-01-02T03:04:05+08:00",
            "--duration",
            "30",
            "--burst-file",
            str(burst_path),
            "--scheme",
            "burst_case_01",
        ],
    )

    assert result.exit_code == 0
    assert '"summary": "爆管分析执行成功"' in result.stdout
    assert '"tjwater --auth-context auth.json data scheme get --name burst_case_01"' in result.stdout
    assert '"tjwater --auth-context auth.json data scheme list"' in result.stdout


def test_main_missing_option_error_includes_usage_and_next_step(capsys):
    exit_code = main(["simulation", "run"])
    stdout = capsys.readouterr().out

    assert exit_code == 2
    assert '"summary": "缺少参数"' in stdout
    assert '"code": "MISSING_PARAMETER"' in stdout
    assert '"usage": "tjwater simulation run --start-time <START_TIME> --duration <DURATION>"' in stdout
    assert '"tjwater help simulation run"' in stdout


def test_main_bare_analysis_returns_typer_help_without_json_error(capsys):
    exit_code = main(["analysis"])
    stdout = capsys.readouterr().out

    assert exit_code == 0
    assert "Usage: tjwater analysis" in stdout
    assert "分析计算与诊断相关命令。" in stdout
    assert '"ok": false' not in stdout


def test_project_list_uses_auth_headers(monkeypatch, tmp_path: Path):
    auth_path = tmp_path / "auth.json"
    auth_path.write_text(
        '{"server":"http://server","access_token":"abc","project_id":"pid","network":"demo"}',
        encoding="utf-8",
    )
    captured = {}

    def fake_request(**kwargs):
        captured.update(kwargs)
        return DummyResponse(json_data=[{"project_id": "pid", "name": "Demo"}])

    monkeypatch.setattr(core.requests, "request", fake_request)

    result = runner.invoke(app, ["--auth-context", str(auth_path), "project", "list"])

    assert result.exit_code == 0
    assert '"ok": true' in result.stdout
    assert captured["headers"]["Authorization"] == "Bearer abc"
    assert captured["url"] == "http://server/api/v1/meta/projects"


def test_simulation_run_translates_rfc3339(monkeypatch, tmp_path: Path):
    auth_path = tmp_path / "auth.json"
    auth_path.write_text(
        '{"server":"http://server","access_token":"abc","network":"demo"}',
        encoding="utf-8",
    )
    captured = {}

    def fake_request(**kwargs):
        captured.update(kwargs)
        return DummyResponse(json_data={"status": "success", "message": "Simulation started"})

    monkeypatch.setattr(core.requests, "request", fake_request)

    result = runner.invoke(
        app,
        [
            "--auth-context",
            str(auth_path),
            "simulation",
            "run",
            "--start-time",
            "2025-01-02T03:04:05+08:00",
            "--duration",
            "30",
        ],
    )

    assert result.exit_code == 0
    assert captured["json"] == {
        "name": "demo",
        "simulation_date": "2025-01-02",
        "start_time": "03:04:05+08:00",
        "duration": 30,
    }
    assert '"tjwater --auth-context auth.json data timeseries realtime links --start-time 2025-01-02T03:04:05+08:00 --end-time 2025-01-02T03:34:05+08:00"' in result.stdout
    assert '"tjwater --auth-context auth.json data timeseries realtime nodes --start-time 2025-01-02T03:04:05+08:00 --end-time 2025-01-02T03:34:05+08:00"' in result.stdout


def test_project_export_inp_downloads_file(monkeypatch, tmp_path: Path):
    auth_path = tmp_path / "auth.json"
    auth_path.write_text(
        '{"server":"http://server","access_token":"abc","network":"demo"}',
        encoding="utf-8",
    )
    output = tmp_path / "demo.inp"
    calls = []

    def fake_request(**kwargs):
        calls.append(kwargs["url"])
        if kwargs["url"].endswith("/dumpinp/"):
            return DummyResponse(json_data=True)
        return DummyResponse(
            headers={"content-type": "application/octet-stream"},
            content=b"inp-content",
            text="inp-content",
        )

    monkeypatch.setattr(core.requests, "request", fake_request)

    result = runner.invoke(
        app,
        ["--auth-context", str(auth_path), "project", "export-inp", "--output", str(output)],
    )

    assert result.exit_code == 0
    assert output.read_bytes() == b"inp-content"
    assert calls == [
        "http://server/api/v1/dumpinp/",
        "http://server/api/v1/downloadinp/",
    ]