"""Phase 2 verification: flat_config returns ProjectContext."""
from src.project_manager import flat_config
from src.models import ProjectContext, ProjectMeta, ProjectOutput, ProjectFiles, ProjectScreenshots, ProjectDiscussion

# Test 1: empty dict input
ctx = flat_config({})
assert isinstance(ctx, ProjectContext)
assert isinstance(ctx.project, ProjectMeta)
assert isinstance(ctx.output, ProjectOutput)
assert isinstance(ctx.files, ProjectFiles)
assert isinstance(ctx.screenshots, ProjectScreenshots)
assert isinstance(ctx.discussion, ProjectDiscussion)
assert ctx.project.name == ""
assert ctx.output.output_dir == ""
assert ctx.files.paths == ()
assert ctx.screenshots.base_dir == "."
assert ctx.screenshots.paths == ()
assert ctx.discussion.roles == ()
assert ctx.discussion.history == ()
print("Test 1 OK: empty dict -> ProjectContext with zero defaults")

# Test 2: full dict input
proj = {
    "project": {"name": "test-proj", "summary_only": True, "execution_mode": "fast"},
    "output": {"namespace": "ns1", "output_dir": "/tmp/out"},
    "files": {"base_dir": "/src", "paths": ["a.py", "b.py"]},
    "screenshots": {"base_dir": "/scr", "paths": ["s1.png"]},
    "context_presets": {"p1": {"name": "p1"}},
    "discussion": {
        "active": "main",
        "roles": ["User", "AI"],
        "discussions": {"main": {"history": ["msg1", "msg2"]}},
    },
}
ctx = flat_config(proj, disc_name="main")
assert ctx.project.name == "test-proj"
assert ctx.project.summary_only is True
assert ctx.project.execution_mode == "fast"
assert ctx.output.namespace == "ns1"
assert ctx.output.output_dir == "/tmp/out"
assert ctx.files.base_dir == "/src"
assert ctx.files.paths == ("a.py", "b.py")
assert ctx.screenshots.base_dir == "/scr"
assert ctx.screenshots.paths == ("s1.png",)
assert ctx.discussion.roles == ("User", "AI")
assert ctx.discussion.history == ("msg1", "msg2")
print("Test 2 OK: full dict input -> correct dataclass fields")

# Test 3: dict-compat methods
assert ctx.get("files") == {"base_dir": "/src", "paths": ["a.py", "b.py"]}
assert ctx["output"] == {"namespace": "ns1", "output_dir": "/tmp/out"}
assert ctx.get("missing", "default") == "default"
print("Test 3 OK: dict-compat __getitem__ / get work")

# Test 4: to_dict() round-trip
d = ctx.to_dict()
assert d["project"]["name"] == "test-proj"
assert d["output"]["output_dir"] == "/tmp/out"
assert d["files"]["paths"] == ["a.py", "b.py"]
assert d["discussion"]["roles"] == ["User", "AI"]
assert d["context_presets"] == {"p1": {"name": "p1"}}
print("Test 4 OK: to_dict() round-trip preserves data")

# Test 5: EMPTY_PROJECT_CONTEXT sentinel
from src.models import EMPTY_PROJECT_CONTEXT
assert isinstance(EMPTY_PROJECT_CONTEXT, ProjectContext)
print("Test 5 OK: EMPTY_PROJECT_CONTEXT sentinel exists")

print("\nAll 5 Phase 2 verification tests PASS.")