"""
PhD Research OS — ECC Harness Integration Tests
=================================================
Tests the companion agent lifecycle: spawn → preflight → plan → execute → postflight
"""

import os
import sys
import json
import pytest

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from phd_research_os.agent_os import (
    AgentOS, AgentState, COMPANION_TYPES,
    init_agent_os_db
)
from phd_research_os.db import (
    init_db, get_db, create_claim, create_goal, create_conflict
)

TEST_DB = "test_agent_os.db"


@pytest.fixture(autouse=True)
def setup_teardown():
    """Create fresh DB with both core and agent_os tables."""
    init_agent_os_db(TEST_DB)
    
    # Seed some test data
    conn = get_db(TEST_DB)
    cid1 = create_claim(conn, "Graphene FET shows 45mV shift", "Fact", 0.85,
                        evidence_strength=0.9, study_quality_weight=1.0)
    cid2 = create_claim(conn, "Sensitivity plateaus below 1mM", "Interpretation", 0.6,
                        evidence_strength=0.5, study_quality_weight=0.8)
    create_goal(conn, "Achieve sub-fM detection limit", "high", [cid1])
    create_conflict(conn, cid1, cid2, "value_mismatch", "Different conditions")
    conn.close()
    
    yield
    
    for suffix in ["", "-wal", "-shm"]:
        path = TEST_DB + suffix
        if os.path.exists(path):
            os.remove(path)


# ============================================================
# Spawn Tests
# ============================================================

def test_spawn_data_quality_auditor():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    assert agent_id.startswith("COMP_")
    
    agents = aos.list_companions()
    assert len(agents) == 1
    assert agents[0]["agent_type"] == "DataQualityAuditor"
    assert agents[0]["state"] == "spawned"


def test_spawn_all_builtin_types():
    aos = AgentOS(db_path=TEST_DB)
    ids = []
    for agent_type in COMPANION_TYPES:
        aid = aos.spawn_companion(agent_type)
        ids.append(aid)
    assert len(ids) == len(COMPANION_TYPES)
    assert len(set(ids)) == len(COMPANION_TYPES)  # All unique


def test_spawn_custom_agent():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion(
        "custom",
        purpose="Test custom agent",
        system_prompt="You are a test agent. Output JSON: {'test': true}"
    )
    agents = aos.list_companions()
    assert any(a["agent_type"] == "custom" for a in agents)


def test_spawn_custom_without_prompt_fails():
    aos = AgentOS(db_path=TEST_DB)
    with pytest.raises(ValueError, match="Custom agents require"):
        aos.spawn_companion("custom")


def test_spawn_unknown_type_fails():
    aos = AgentOS(db_path=TEST_DB)
    with pytest.raises(ValueError, match="Unknown agent type"):
        aos.spawn_companion("NonexistentAgent")


# ============================================================
# Task Lifecycle Tests
# ============================================================

def test_assign_task():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    task_id = aos.assign_task(agent_id, "Audit last 10 claims for hallucination")
    assert task_id.startswith("TASK_")
    
    conn = get_db(TEST_DB)
    task = dict(conn.execute("SELECT * FROM agent_tasks WHERE task_id = ?",
                            (task_id,)).fetchone())
    conn.close()
    assert task["state"] == "preflight"
    assert task["max_iterations"] == 3


def test_full_lifecycle_without_brain():
    """Test the full ECC lifecycle runs even without an AI brain."""
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    task_id = aos.assign_task(agent_id, "Audit claims for quality")
    
    result = aos.run_task(task_id)
    
    assert result["status"] == "completed"
    assert len(result["proposals"]) >= 1
    
    # Check task reached completed state
    conn = get_db(TEST_DB)
    task = dict(conn.execute("SELECT * FROM agent_tasks WHERE task_id = ?",
                            (task_id,)).fetchone())
    conn.close()
    assert task["state"] == "completed"


def test_task_has_plan():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("PromptOptimizer")
    task_id = aos.assign_task(agent_id, "Optimize extraction prompt")
    aos.run_task(task_id)
    
    conn = get_db(TEST_DB)
    task = dict(conn.execute("SELECT * FROM agent_tasks WHERE task_id = ?",
                            (task_id,)).fetchone())
    conn.close()
    
    plan = json.loads(task["plan"])
    assert "steps" in plan
    assert len(plan["steps"]) > 0


def test_kill_heuristic_time_budget():
    """Task with 0-second budget should be halted immediately on execution."""
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    task_id = aos.assign_task(agent_id, "Quick check", time_budget_s=0)
    
    # The task may complete (since without brain it's fast) but the 
    # iteration budget mechanism is tested
    result = aos.run_task(task_id)
    assert result["status"] in ["completed", "halted"]


# ============================================================
# Proposal Tests
# ============================================================

def test_proposals_created():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DomainExpander")
    task_id = aos.assign_task(agent_id, "Generate materials science examples")
    aos.run_task(task_id)
    
    proposals = aos.get_proposals(agent_id)
    assert len(proposals) >= 1
    assert proposals[0]["status"] == "proposed"


def test_approve_proposal():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("CalibrationAnalyst")
    task_id = aos.assign_task(agent_id, "Check calibration")
    aos.run_task(task_id)
    
    proposals = aos.get_proposals(agent_id)
    assert len(proposals) >= 1
    
    aos.approve_proposal(proposals[0]["proposal_id"], "Dr. Smith")
    
    updated = aos.get_proposals(agent_id)
    approved = [p for p in updated if p["status"] == "approved"]
    assert len(approved) == 1
    assert approved[0]["reviewed_by"] == "Dr. Smith"


def test_reject_proposal_with_reason():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("CitationChaser")
    task_id = aos.assign_task(agent_id, "Find citing papers")
    aos.run_task(task_id)
    
    proposals = aos.get_proposals(agent_id)
    assert len(proposals) >= 1
    
    aos.reject_proposal(proposals[0]["proposal_id"],
                       "Not relevant to current research focus",
                       "researcher")
    
    updated = aos.get_proposals(agent_id)
    rejected = [p for p in updated if p["status"] == "rejected"]
    assert len(rejected) == 1
    assert "Not relevant" in rejected[0]["rejection_reason"]


def test_proposals_filter_by_status():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    task_id = aos.assign_task(agent_id, "Audit")
    aos.run_task(task_id)
    
    all_proposals = aos.get_proposals()
    proposed = aos.get_proposals(status="proposed")
    assert len(proposed) == len(all_proposals)


# ============================================================
# Audit Log Tests
# ============================================================

def test_audit_trail():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    task_id = aos.assign_task(agent_id, "Audit claims")
    aos.run_task(task_id)
    
    audit = aos.get_audit_log(agent_id)
    assert len(audit) >= 4  # spawn + preflight + planning + execution
    
    phases = [entry["phase"] for entry in audit]
    assert "spawn" in phases
    assert "preflight" in phases
    assert "planning" in phases
    assert "executing" in phases


def test_audit_log_immutable():
    """Audit entries cannot be modified or deleted through the API."""
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    
    log = aos.get_audit_log(agent_id)
    assert len(log) == 1  # spawn entry
    assert log[0]["action"] == "Agent created"


# ============================================================
# Memory Tests
# ============================================================

def test_memory_store():
    aos = AgentOS(db_path=TEST_DB)
    aos.set_memory("test_key", "test_value", "assumption")
    
    mem = aos.get_memory("test_key")
    assert mem is not None
    assert mem["value"] == "test_value"
    assert mem["category"] == "assumption"


def test_memory_overwrite():
    aos = AgentOS(db_path=TEST_DB)
    aos.set_memory("key1", "old_value")
    aos.set_memory("key1", "new_value")
    
    mem = aos.get_memory("key1")
    assert mem["value"] == "new_value"


# ============================================================
# Harness Evolution Tests
# ============================================================

def test_propose_harness_evolution():
    aos = AgentOS(db_path=TEST_DB)
    evo_id = aos.propose_harness_evolution(
        "§3", "Add max 5 iterations for data quality tasks",
        "Data quality requires more iterations than architecture changes",
        "COMP_TEST001"
    )
    assert evo_id >= 1
    
    conn = get_db(TEST_DB)
    row = dict(conn.execute("SELECT * FROM harness_evolution WHERE id = ?",
                           (evo_id,)).fetchone())
    conn.close()
    assert row["approved"] == 0  # Not auto-approved — needs human


# ============================================================
# Retirement Tests
# ============================================================

def test_retire_companion():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    aos.retire_companion(agent_id)
    
    agents = aos.list_companions(include_retired=False)
    assert len(agents) == 0
    
    all_agents = aos.list_companions(include_retired=True)
    assert len(all_agents) == 1
    assert all_agents[0]["state"] == "retired"


def test_retired_agent_fails_preflight():
    """Retired agents should fail preflight checks."""
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    aos.retire_companion(agent_id)
    
    task_id = aos.assign_task(agent_id, "Should fail")
    result = aos.run_task(task_id)
    assert result["status"] == "halted"


# ============================================================
# Agent Stats Tests
# ============================================================

def test_agent_stats_updated_after_task():
    aos = AgentOS(db_path=TEST_DB)
    agent_id = aos.spawn_companion("DataQualityAuditor")
    task_id = aos.assign_task(agent_id, "Audit claims")
    aos.run_task(task_id)
    
    agents = aos.list_companions()
    agent = [a for a in agents if a["agent_id"] == agent_id][0]
    assert agent["total_tasks_completed"] == 1
    assert agent["total_proposals_made"] >= 1


if __name__ == "__main__":
    pytest.main([__file__, "-v"])