"""Tests for agents/runner.py — agent execution with mocked claude CLI."""

import json
import subprocess
import pytest
from unittest.mock import patch, MagicMock
from core.db import init_db
from core import models
from agents.runner import run_agent, run_pipeline, run_audit, _try_parse_json


@pytest.fixture
def conn():
    c = init_db(":memory:")
    models.create_project(c, "vdol", "ВДОЛЬ", "~/projects/vdolipoperek",
                          tech_stack=["vue3"])
    models.create_task(c, "VDOL-001", "vdol", "Fix bug",
                       brief={"route_type": "debug"})
    yield c
    c.close()


def _mock_claude_success(output_data):
    """Create a mock subprocess result with successful claude output."""
    mock = MagicMock()
    mock.stdout = json.dumps(output_data) if isinstance(output_data, dict) else output_data
    mock.stderr = ""
    mock.returncode = 0
    return mock


def _mock_claude_failure(error_msg):
    mock = MagicMock()
    mock.stdout = ""
    mock.stderr = error_msg
    mock.returncode = 1
    return mock


# ---------------------------------------------------------------------------
# run_agent
# ---------------------------------------------------------------------------

class TestRunAgent:
    @patch("agents.runner.subprocess.run")
    def test_successful_agent_run(self, mock_run, conn):
        mock_run.return_value = _mock_claude_success({
            "result": "Found race condition in useSearch.ts",
            "usage": {"total_tokens": 5000},
            "cost_usd": 0.015,
        })

        result = run_agent(conn, "debugger", "VDOL-001", "vdol")

        assert result["success"] is True
        assert result["role"] == "debugger"
        assert result["model"] == "sonnet"
        assert result["duration_seconds"] >= 0

        # Verify claude was called with right args
        call_args = mock_run.call_args
        cmd = call_args[0][0]
        assert "claude" in cmd[0]
        assert "-p" in cmd
        assert "--output-format" in cmd
        assert "json" in cmd

    @patch("agents.runner.subprocess.run")
    def test_failed_agent_run(self, mock_run, conn):
        mock_run.return_value = _mock_claude_failure("API error")

        result = run_agent(conn, "debugger", "VDOL-001", "vdol")

        assert result["success"] is False

        # Should be logged in agent_logs
        logs = conn.execute("SELECT * FROM agent_logs WHERE task_id='VDOL-001'").fetchall()
        assert len(logs) == 1
        assert logs[0]["success"] == 0

    def test_dry_run_returns_prompt(self, conn):
        result = run_agent(conn, "debugger", "VDOL-001", "vdol", dry_run=True)

        assert result["dry_run"] is True
        assert result["prompt"] is not None
        assert "VDOL-001" in result["prompt"]
        assert result["output"] is None

    @patch("agents.runner.subprocess.run")
    def test_agent_logs_to_db(self, mock_run, conn):
        mock_run.return_value = _mock_claude_success({"result": "ok"})

        run_agent(conn, "tester", "VDOL-001", "vdol")

        logs = conn.execute("SELECT * FROM agent_logs WHERE agent_role='tester'").fetchall()
        assert len(logs) == 1
        assert logs[0]["project_id"] == "vdol"

    @patch("agents.runner.subprocess.run")
    def test_full_output_saved_to_db(self, mock_run, conn):
        """Bug fix: output_summary must contain the FULL output, not truncated."""
        long_json = json.dumps({
            "result": json.dumps({
                "summary": "Security audit complete",
                "findings": [{"title": f"Finding {i}", "severity": "HIGH"} for i in range(50)],
            }),
        })
        mock = MagicMock()
        mock.stdout = long_json
        mock.stderr = ""
        mock.returncode = 0
        mock_run.return_value = mock

        run_agent(conn, "security", "VDOL-001", "vdol")

        logs = conn.execute("SELECT output_summary FROM agent_logs WHERE agent_role='security'").fetchall()
        assert len(logs) == 1
        output = logs[0]["output_summary"]
        assert output is not None
        assert len(output) > 1000  # Must not be truncated
        # Should contain all 50 findings
        assert "Finding 49" in output

    @patch("agents.runner.subprocess.run")
    def test_dict_output_saved_as_json_string(self, mock_run, conn):
        """When claude returns structured JSON, it must be saved as string."""
        mock_run.return_value = _mock_claude_success({
            "result": {"status": "ok", "files": ["a.py", "b.py"]},
        })

        result = run_agent(conn, "debugger", "VDOL-001", "vdol")

        # output should be a string (JSON serialized), not a dict
        assert isinstance(result["raw_output"], str)

        logs = conn.execute("SELECT output_summary FROM agent_logs WHERE agent_role='debugger'").fetchall()
        saved = logs[0]["output_summary"]
        assert isinstance(saved, str)
        assert "a.py" in saved

    @patch("agents.runner.subprocess.run")
    def test_previous_output_passed(self, mock_run, conn):
        mock_run.return_value = _mock_claude_success({"result": "tests pass"})

        run_agent(conn, "tester", "VDOL-001", "vdol",
                  previous_output="Found bug in line 42")

        call_args = mock_run.call_args
        prompt = call_args[0][0][2]  # -p argument
        assert "line 42" in prompt


# ---------------------------------------------------------------------------
# run_pipeline
# ---------------------------------------------------------------------------

class TestRunPipeline:
    @patch("agents.runner.subprocess.run")
    def test_successful_pipeline(self, mock_run, conn):
        mock_run.return_value = _mock_claude_success({"result": "done"})

        steps = [
            {"role": "debugger", "brief": "find bug"},
            {"role": "tester", "depends_on": "debugger", "brief": "verify"},
        ]
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is True
        assert result["steps_completed"] == 2
        assert len(result["results"]) == 2

        # Pipeline created in DB
        pipe = conn.execute("SELECT * FROM pipelines WHERE task_id='VDOL-001'").fetchone()
        assert pipe is not None
        assert pipe["status"] == "completed"

        # Task updated to review
        task = models.get_task(conn, "VDOL-001")
        assert task["status"] == "review"

    @patch("agents.runner.subprocess.run")
    def test_pipeline_fails_on_step(self, mock_run, conn):
        # First step succeeds, second fails
        mock_run.side_effect = [
            _mock_claude_success({"result": "found bug"}),
            _mock_claude_failure("compilation error"),
        ]

        steps = [
            {"role": "debugger", "brief": "find"},
            {"role": "frontend_dev", "brief": "fix"},
            {"role": "tester", "brief": "test"},
        ]
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is False
        assert result["steps_completed"] == 1  # Only debugger completed
        assert "frontend_dev" in result["error"]

        # Pipeline marked as failed
        pipe = conn.execute("SELECT * FROM pipelines WHERE task_id='VDOL-001'").fetchone()
        assert pipe["status"] == "failed"

        # Task marked as blocked
        task = models.get_task(conn, "VDOL-001")
        assert task["status"] == "blocked"

    def test_pipeline_dry_run(self, conn):
        steps = [
            {"role": "debugger", "brief": "find"},
            {"role": "tester", "brief": "verify"},
        ]
        result = run_pipeline(conn, "VDOL-001", steps, dry_run=True)

        assert result["dry_run"] is True
        assert result["success"] is True
        assert result["steps_completed"] == 2

        # No pipeline created in DB
        pipes = conn.execute("SELECT * FROM pipelines").fetchall()
        assert len(pipes) == 0

    @patch("agents.runner.subprocess.run")
    def test_pipeline_chains_output(self, mock_run, conn):
        """Output from step N is passed as previous_output to step N+1."""
        call_count = [0]

        def side_effect(*args, **kwargs):
            call_count[0] += 1
            if call_count[0] == 1:
                return _mock_claude_success({"result": "bug is in line 42"})
            return _mock_claude_success({"result": "test written"})

        mock_run.side_effect = side_effect

        steps = [
            {"role": "debugger", "brief": "find"},
            {"role": "tester", "brief": "write test"},
        ]
        run_pipeline(conn, "VDOL-001", steps)

        # Second call should include first step's output in prompt
        second_call = mock_run.call_args_list[1]
        prompt = second_call[0][0][2]  # -p argument
        assert "line 42" in prompt or "bug" in prompt

    def test_pipeline_task_not_found(self, conn):
        result = run_pipeline(conn, "NONEXISTENT", [{"role": "debugger"}])
        assert result["success"] is False
        assert "not found" in result["error"]

    @patch("agents.runner.run_hooks")
    @patch("agents.runner.subprocess.run")
    def test_hooks_called_after_successful_pipeline(self, mock_run, mock_hooks, conn):
        mock_run.return_value = _mock_claude_success({"result": "done"})
        mock_hooks.return_value = []

        steps = [{"role": "debugger", "brief": "find"}]
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is True
        mock_hooks.assert_called_once()
        call_kwargs = mock_hooks.call_args
        assert call_kwargs[1].get("event") == "pipeline_completed" or \
               call_kwargs[0][3] == "pipeline_completed"

    @patch("agents.runner.run_hooks")
    @patch("agents.runner.subprocess.run")
    def test_hooks_not_called_on_failed_pipeline(self, mock_run, mock_hooks, conn):
        mock_run.return_value = _mock_claude_failure("compilation error")
        mock_hooks.return_value = []

        steps = [{"role": "debugger", "brief": "find"}]
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is False
        mock_hooks.assert_not_called()

    @patch("agents.runner.run_hooks")
    @patch("agents.runner.subprocess.run")
    def test_hook_failure_does_not_affect_pipeline_result(self, mock_run, mock_hooks, conn):
        mock_run.return_value = _mock_claude_success({"result": "done"})
        mock_hooks.side_effect = Exception("hook exploded")

        steps = [{"role": "debugger", "brief": "find"}]
        # Must not raise — hook failures must not propagate
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is True


# ---------------------------------------------------------------------------
# Auto mode
# ---------------------------------------------------------------------------

class TestAutoMode:
    @patch("core.followup.generate_followups")
    @patch("agents.runner.run_hooks")
    @patch("agents.runner.subprocess.run")
    def test_auto_mode_generates_followups(self, mock_run, mock_hooks, mock_followup, conn):
        """Auto mode должен вызывать generate_followups после task_auto_approved."""
        mock_run.return_value = _mock_claude_success({"result": "done"})
        mock_hooks.return_value = []
        mock_followup.return_value = {"created": [], "pending_actions": []}

        models.update_project(conn, "vdol", execution_mode="auto")
        steps = [{"role": "debugger", "brief": "find"}]
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is True
        mock_followup.assert_called_once_with(conn, "VDOL-001")
        task = models.get_task(conn, "VDOL-001")
        assert task["status"] == "done"

    @patch("core.followup.generate_followups")
    @patch("agents.runner.run_hooks")
    @patch("agents.runner.subprocess.run")
    def test_review_mode_skips_followups(self, mock_run, mock_hooks, mock_followup, conn):
        """Review mode НЕ должен вызывать generate_followups автоматически."""
        mock_run.return_value = _mock_claude_success({"result": "done"})
        mock_hooks.return_value = []
        mock_followup.return_value = {"created": [], "pending_actions": []}

        # Проект остаётся в default "review" mode
        steps = [{"role": "debugger", "brief": "find"}]
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is True
        mock_followup.assert_not_called()
        task = models.get_task(conn, "VDOL-001")
        assert task["status"] == "review"

    @patch("core.followup.generate_followups")
    @patch("agents.runner.run_hooks")
    @patch("agents.runner.subprocess.run")
    def test_auto_mode_skips_followups_for_followup_tasks(self, mock_run, mock_hooks, mock_followup, conn):
        """Auto mode НЕ должен генерировать followups для followup-задач (предотвращение рекурсии)."""
        mock_run.return_value = _mock_claude_success({"result": "done"})
        mock_hooks.return_value = []
        mock_followup.return_value = {"created": [], "pending_actions": []}

        models.update_project(conn, "vdol", execution_mode="auto")
        models.update_task(conn, "VDOL-001", brief={"source": "followup:VDOL-000"})

        steps = [{"role": "debugger", "brief": "find"}]
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is True
        mock_followup.assert_not_called()

    @patch("core.followup.auto_resolve_pending_actions")
    @patch("core.followup.generate_followups")
    @patch("agents.runner.run_hooks")
    @patch("agents.runner.subprocess.run")
    def test_auto_mode_resolves_pending_actions(self, mock_run, mock_hooks, mock_followup, mock_resolve, conn):
        """Auto mode должен авто-резолвить pending_actions из followup generation."""
        mock_run.return_value = _mock_claude_success({"result": "done"})
        mock_hooks.return_value = []

        pending = [{"type": "permission_fix", "description": "Fix X",
                    "original_item": {}, "options": ["rerun"]}]
        mock_followup.return_value = {"created": [], "pending_actions": pending}
        mock_resolve.return_value = [{"resolved": "rerun", "result": {}}]

        models.update_project(conn, "vdol", execution_mode="auto")
        steps = [{"role": "debugger", "brief": "find"}]
        result = run_pipeline(conn, "VDOL-001", steps)

        assert result["success"] is True
        mock_resolve.assert_called_once_with(conn, "VDOL-001", pending)


# ---------------------------------------------------------------------------
# JSON parsing
# ---------------------------------------------------------------------------

class TestTryParseJson:
    def test_direct_json(self):
        assert _try_parse_json('{"a": 1}') == {"a": 1}

    def test_json_in_code_fence(self):
        text = 'Some text\n```json\n{"a": 1}\n```\nMore text'
        assert _try_parse_json(text) == {"a": 1}

    def test_json_embedded_in_text(self):
        text = 'Here is the result: {"status": "ok", "count": 42} and more'
        result = _try_parse_json(text)
        assert result == {"status": "ok", "count": 42}

    def test_empty_string(self):
        assert _try_parse_json("") is None

    def test_no_json(self):
        assert _try_parse_json("just plain text") is None

    def test_json_array(self):
        assert _try_parse_json('[1, 2, 3]') == [1, 2, 3]


# ---------------------------------------------------------------------------
# Non-interactive mode
# ---------------------------------------------------------------------------

class TestNonInteractive:
    @patch("agents.runner.subprocess.run")
    def test_noninteractive_sets_stdin_devnull(self, mock_run, conn):
        """When noninteractive=True, subprocess.run should get stdin=subprocess.DEVNULL."""
        mock_run.return_value = _mock_claude_success({"result": "ok"})
        run_agent(conn, "debugger", "VDOL-001", "vdol", noninteractive=True)
        call_kwargs = mock_run.call_args[1]
        assert call_kwargs.get("stdin") == subprocess.DEVNULL

    @patch("agents.runner.subprocess.run")
    def test_noninteractive_uses_300s_timeout(self, mock_run, conn):
        mock_run.return_value = _mock_claude_success({"result": "ok"})
        run_agent(conn, "debugger", "VDOL-001", "vdol", noninteractive=True)
        call_kwargs = mock_run.call_args[1]
        assert call_kwargs.get("timeout") == 300

    @patch("agents.runner.subprocess.run")
    def test_interactive_uses_600s_timeout(self, mock_run, conn):
        mock_run.return_value = _mock_claude_success({"result": "ok"})
        run_agent(conn, "debugger", "VDOL-001", "vdol", noninteractive=False)
        call_kwargs = mock_run.call_args[1]
        assert call_kwargs.get("timeout") == 300

    @patch("agents.runner.subprocess.run")
    def test_interactive_no_stdin_override(self, mock_run, conn):
        """In interactive mode, stdin should not be set to DEVNULL."""
        mock_run.return_value = _mock_claude_success({"result": "ok"})
        run_agent(conn, "debugger", "VDOL-001", "vdol", noninteractive=False)
        call_kwargs = mock_run.call_args[1]
        assert call_kwargs.get("stdin") == subprocess.DEVNULL

    @patch.dict("os.environ", {"KIN_NONINTERACTIVE": "1"})
    @patch("agents.runner.subprocess.run")
    def test_env_var_activates_noninteractive(self, mock_run, conn):
        """KIN_NONINTERACTIVE=1 env var should activate non-interactive mode."""
        mock_run.return_value = _mock_claude_success({"result": "ok"})
        run_agent(conn, "debugger", "VDOL-001", "vdol", noninteractive=False)
        call_kwargs = mock_run.call_args[1]
        assert call_kwargs.get("stdin") == subprocess.DEVNULL
        assert call_kwargs.get("timeout") == 300

    @patch("agents.runner.subprocess.run")
    def test_allow_write_adds_skip_permissions(self, mock_run, conn):
        mock_run.return_value = _mock_claude_success({"result": "ok"})
        run_agent(conn, "debugger", "VDOL-001", "vdol", allow_write=True)
        cmd = mock_run.call_args[0][0]
        assert "--dangerously-skip-permissions" in cmd

    @patch("agents.runner.subprocess.run")
    def test_no_allow_write_no_skip_permissions(self, mock_run, conn):
        mock_run.return_value = _mock_claude_success({"result": "ok"})
        run_agent(conn, "debugger", "VDOL-001", "vdol", allow_write=False)
        cmd = mock_run.call_args[0][0]
        assert "--dangerously-skip-permissions" not in cmd


# ---------------------------------------------------------------------------
# run_audit
# ---------------------------------------------------------------------------

class TestRunAudit:
    @patch("agents.runner.subprocess.run")
    def test_audit_success(self, mock_run, conn):
        """Audit should return parsed already_done/still_pending/unclear."""
        audit_output = json.dumps({
            "already_done": [{"id": "VDOL-001", "reason": "Fixed in runner.py"}],
            "still_pending": [],
            "unclear": [],
        })
        mock_run.return_value = _mock_claude_success({"result": audit_output})

        result = run_audit(conn, "vdol")

        assert result["success"] is True
        assert len(result["already_done"]) == 1
        assert result["already_done"][0]["id"] == "VDOL-001"

    @patch("agents.runner.subprocess.run")
    def test_audit_logs_to_db(self, mock_run, conn):
        """Audit should log to agent_logs with role=backlog_audit."""
        mock_run.return_value = _mock_claude_success({
            "result": json.dumps({"already_done": [], "still_pending": [], "unclear": []}),
        })

        run_audit(conn, "vdol")

        logs = conn.execute(
            "SELECT * FROM agent_logs WHERE agent_role='backlog_audit'"
        ).fetchall()
        assert len(logs) == 1
        assert logs[0]["action"] == "audit"

    def test_audit_no_pending_tasks(self, conn):
        """If no pending tasks, return success with empty lists."""
        # Mark existing task as done
        models.update_task(conn, "VDOL-001", status="done")

        result = run_audit(conn, "vdol")

        assert result["success"] is True
        assert result["already_done"] == []
        assert "No pending tasks" in result.get("message", "")

    def test_audit_project_not_found(self, conn):
        result = run_audit(conn, "nonexistent")
        assert result["success"] is False
        assert "not found" in result["error"]

    @patch("agents.runner.subprocess.run")
    def test_audit_uses_sonnet(self, mock_run, conn):
        """Audit should use sonnet model."""
        mock_run.return_value = _mock_claude_success({
            "result": json.dumps({"already_done": [], "still_pending": [], "unclear": []}),
        })

        run_audit(conn, "vdol")

        cmd = mock_run.call_args[0][0]
        model_idx = cmd.index("--model")
        assert cmd[model_idx + 1] == "sonnet"

    @patch("agents.runner.subprocess.run")
    def test_audit_includes_tasks_in_prompt(self, mock_run, conn):
        """The prompt should contain the task title."""
        mock_run.return_value = _mock_claude_success({
            "result": json.dumps({"already_done": [], "still_pending": [], "unclear": []}),
        })

        run_audit(conn, "vdol")

        prompt = mock_run.call_args[0][0][2]  # -p argument
        assert "VDOL-001" in prompt
        assert "Fix bug" in prompt

    @patch("agents.runner.subprocess.run")
    def test_audit_auto_apply_marks_done(self, mock_run, conn):
        """auto_apply=True should mark already_done tasks as done in DB."""
        mock_run.return_value = _mock_claude_success({
            "result": json.dumps({
                "already_done": [{"id": "VDOL-001", "reason": "Done"}],
                "still_pending": [],
                "unclear": [],
            }),
        })

        result = run_audit(conn, "vdol", auto_apply=True)

        assert result["success"] is True
        assert "VDOL-001" in result["applied"]
        task = models.get_task(conn, "VDOL-001")
        assert task["status"] == "done"

    @patch("agents.runner.subprocess.run")
    def test_audit_no_auto_apply_keeps_pending(self, mock_run, conn):
        """auto_apply=False should NOT change task status."""
        mock_run.return_value = _mock_claude_success({
            "result": json.dumps({
                "already_done": [{"id": "VDOL-001", "reason": "Done"}],
                "still_pending": [],
                "unclear": [],
            }),
        })

        result = run_audit(conn, "vdol", auto_apply=False)

        assert result["success"] is True
        assert result["applied"] == []
        task = models.get_task(conn, "VDOL-001")
        assert task["status"] == "pending"

    @patch("agents.runner.subprocess.run")
    def test_audit_uses_dangerously_skip_permissions(self, mock_run, conn):
        """Audit must use --dangerously-skip-permissions for tool access."""
        mock_run.return_value = _mock_claude_success({
            "result": json.dumps({"already_done": [], "still_pending": [], "unclear": []}),
        })

        run_audit(conn, "vdol")

        cmd = mock_run.call_args[0][0]
        assert "--dangerously-skip-permissions" in cmd