import json
from pathlib import Path

from typer.testing import CliRunner

from tjwater_cli import core
from tjwater_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(monkeypatch):
    monkeypatch.setenv("TJWATER_SERVER", "http://server")
    monkeypatch.setenv("TJWATER_ACCESS_TOKEN", "abc")
    monkeypatch.setenv("TJWATER_PROJECT_ID", "p1")
    monkeypatch.setenv("TJWATER_USER_ID", "u1")
    monkeypatch.setenv("TJWATER_USERNAME", "tester")
    monkeypatch.setenv("TJWATER_NETWORK", "net1")

    auth = core.load_auth_context(auth_stdin=False)

    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,
        scheme=None,
        timeout=core.DEFAULT_TIMEOUT,
        request_id="req-1",
    )

    assert runtime.server == core.DEFAULT_SERVER


def test_help_outputs_json_lists_commands():
    result = runner.invoke(app, ["help"])
    payload = json.loads(result.stdout)

    assert result.exit_code == 0
    assert payload["schema_version"] == "tjwater-cli/v1"
    assert any(command["command"] == "project" for command in payload["commands"])
    assert any(command["command"] == "analysis" for command in payload["commands"])
    assert payload["menu_level"] == 1
    assert all(command["command"] != "project list" for command in payload["commands"])


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

    assert result.exit_code == 2
    assert "No such option: --json" in result.output


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

    assert result.exit_code == 0
    assert payload["summary"] == "模拟运行与调度相关命令。"
    commands = {command["command"]: command for command in payload["commands"]}
    assert commands["simulation run"]["summary"] == "触发指定绝对时间的模拟运行"
    assert commands["simulation run"]["usage"] == "tjwater-cli simulation run --start-time <START_TIME> --duration <DURATION>"
    assert "tjwater-cli" in commands["simulation run"]["example"]
    assert "simulation run" in commands["simulation run"]["example"]


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

    assert result.exit_code == 0
    assert payload["summary"] == "漏损分析相关命令。"
    commands = {command["command"]: command for command in payload["commands"]}
    assert commands["analysis leakage identify"]["summary"] == "执行漏损识别"
    assert commands["analysis leakage identify"]["example"] == "tjwater-cli analysis leakage identify --start-time 2025-01-02T03:04:05+08:00 --end-time 2025-01-02T04:04:05+08:00"


def test_analysis_help_uses_group_summaries_for_nested_groups():
    result = runner.invoke(app, ["analysis", "help"])
    payload = json.loads(result.stdout)
    commands = {command["command"]: command for command in payload["commands"]}

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


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" 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_outputs_json():
    result = runner.invoke(app, ["help", "simulation", "run"])
    payload = json.loads(result.stdout)

    assert result.exit_code == 0
    assert payload["command"] == "simulation run"
    assert payload["output"] == "模拟触发结果；实时数据需通过 data timeseries 命令按时间段查询"
    assert payload["usage"] == "tjwater-cli simulation run --start-time <START_TIME> --duration <DURATION>"
    assert len(payload["examples"]) == 1
    assert "simulation run" in payload["examples"][0]


def test_project_help_uses_legal_kind_example():
    result = runner.invoke(app, ["project", "help"])
    payload = json.loads(result.stdout)
    commands = {command["command"]: command for command in payload["commands"]}

    assert result.exit_code == 0
    assert "project data" in commands["project data"]["example"]


def test_root_help_flag_uses_typer_style_with_examples():
    result = runner.invoke(app, ["--help"], prog_name="tjwater-cli")

    assert result.exit_code == 0
    assert "Usage: tjwater-cli" in result.stdout
    assert "Examples:" in result.stdout
    assert "tjwater-cli help simulation run" in result.stdout


def test_leaf_help_flag_includes_usage_and_example():
    result = runner.invoke(app, ["simulation", "run", "--help"], prog_name="tjwater-cli")

    assert result.exit_code == 0
    assert "Usage: tjwater-cli simulation run [OPTIONS]" in result.stdout
    assert "Usage example:" in result.stdout
    assert "--start-time <START_TIME>" in result.stdout
    assert "--duration" in result.stdout
    assert "Examples:" in result.stdout
    assert "tjwater-cli simulation run" in result.stdout
    assert "START_TIME" in result.stdout
    assert "DURATION" in result.stdout


def test_analysis_burst_returns_next_step_to_fetch_scheme(monkeypatch, tmp_path: Path):
    monkeypatch.setenv("TJWATER_SERVER", "http://server")
    monkeypatch.setenv("TJWATER_ACCESS_TOKEN", "abc")
    monkeypatch.setenv("TJWATER_NETWORK", "demo")
    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,
        [
            "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-cli data scheme get --name burst_case_01" in result.stdout
    assert "tjwater-cli 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-cli simulation run --start-time <START_TIME> --duration <DURATION>"' in stdout
    assert '"tjwater-cli 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-cli 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_stdin(monkeypatch):
    monkeypatch.setenv("TJWATER_SERVER", "http://server")
    monkeypatch.setenv("TJWATER_ACCESS_TOKEN", "abc")
    monkeypatch.setenv("TJWATER_PROJECT_ID", "pid")
    monkeypatch.setenv("TJWATER_NETWORK", "demo")
    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, ["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):
    monkeypatch.setenv("TJWATER_SERVER", "http://server")
    monkeypatch.setenv("TJWATER_ACCESS_TOKEN", "abc")
    monkeypatch.setenv("TJWATER_NETWORK", "demo")
    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,
        [
            "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-cli data timeseries realtime links" in result.stdout
    assert "tjwater-cli data timeseries realtime nodes" in result.stdout


def test_project_export_inp_downloads_file(monkeypatch, tmp_path: Path):
    monkeypatch.setenv("TJWATER_SERVER", "http://server")
    monkeypatch.setenv("TJWATER_ACCESS_TOKEN", "abc")
    monkeypatch.setenv("TJWATER_NETWORK", "demo")
    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,
        ["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/",
    ]