"""P14.1 — Milestones CRUD API tests.

Covers:
- List milestones (project-scoped)
- Get milestone by ID
- Create milestone
- Update milestone
- Delete milestone
- Milestone filtering and sorting
"""
import pytest
from datetime import datetime, timedelta


class TestMilestonesCRUD:
    """Milestone CRUD endpoints."""

    def test_list_milestones(self, client, db, make_user, make_project, auth_header, seed_roles_and_permissions, make_member):
        """List milestones for a project."""
        admin_role, mgr_role, dev_role = seed_roles_and_permissions
        user = make_user()
        project = make_project()
        make_member(project.id, user.id, dev_role.id)
        
        # Create milestones
        from app.models.milestone import Milestone, MilestoneStatus
        milestone1 = Milestone(title="Milestone 1", project_id=project.id, status=MilestoneStatus.OPEN)
        milestone2 = Milestone(title="Milestone 2", project_id=project.id, status=MilestoneStatus.OPEN)
        db.add_all([milestone1, milestone2])
        db.commit()
        
        resp = client.get(f"/projects/{project.id}/milestones", headers=auth_header(user))
        assert resp.status_code == 200
        data = resp.json()
        assert len(data) == 2

    def test_get_milestone_by_id(self, client, db, make_user, make_project, auth_header, seed_roles_and_permissions, make_member):
        """Get specific milestone."""
        admin_role, mgr_role, dev_role = seed_roles_and_permissions
        user = make_user()
        project = make_project()
        make_member(project.id, user.id, dev_role.id)
        
        from app.models.milestone import Milestone, MilestoneStatus
        milestone = Milestone(
            title="Test Milestone",
            description="Test desc",
            project_id=project.id,
            status=MilestoneStatus.OPEN
        )
        db.add(milestone)
        db.commit()
        
        resp = client.get(
            f"/projects/{project.id}/milestones/{milestone.id}",
            headers=auth_header(user)
        )
        assert resp.status_code == 200
        data = resp.json()
        assert data["id"] == milestone.id
        assert data["title"] == "Test Milestone"

    def test_create_milestone(self, client, db, make_user, make_project, auth_header, seed_roles_and_permissions, make_member):
        """Create new milestone."""
        admin_role, mgr_role, dev_role = seed_roles_and_permissions
        user = make_user()
        project = make_project(project_code="PROJ")
        make_member(project.id, user.id, dev_role.id)
        
        due_date = (datetime.now() + timedelta(days=30)).isoformat()
        resp = client.post(
            f"/projects/{project.id}/milestones",
            json={
                "title": "New Milestone",
                "description": "Milestone description",
                "due_date": due_date
            },
            headers=auth_header(user)
        )
        assert resp.status_code == 201
        data = resp.json()
        assert data["title"] == "New Milestone"
        assert data["status"] == "open"
        assert data["milestone_code"].startswith("PROJ:")

    def test_update_milestone(self, client, db, make_user, make_project, auth_header, seed_roles_and_permissions, make_member):
        """Update milestone (allowed in open status)."""
        admin_role, mgr_role, dev_role = seed_roles_and_permissions
        user = make_user()
        project = make_project()
        make_member(project.id, user.id, dev_role.id)
        
        from app.models.milestone import Milestone, MilestoneStatus
        milestone = Milestone(
            title="Old Title",
            project_id=project.id,
            status=MilestoneStatus.OPEN
        )
        db.add(milestone)
        db.commit()
        
        resp = client.patch(
            f"/projects/{project.id}/milestones/{milestone.id}",
            json={"title": "Updated Title"},
            headers=auth_header(user)
        )
        assert resp.status_code == 200
        data = resp.json()
        assert data["title"] == "Updated Title"

    def test_delete_milestone(self, client, db, make_user, make_project, auth_header, seed_roles_and_permissions, make_member):
        """Delete milestone."""
        admin_role, mgr_role, dev_role = seed_roles_and_permissions
        user = make_user()
        project = make_project()
        make_member(project.id, user.id, dev_role.id)
        
        from app.models.milestone import Milestone, MilestoneStatus
        milestone = Milestone(title="To Delete", project_id=project.id, status=MilestoneStatus.OPEN)
        db.add(milestone)
        db.commit()
        
        resp = client.delete(
            f"/projects/{project.id}/milestones/{milestone.id}",
            headers=auth_header(user)
        )
        assert resp.status_code == 204

    def test_milestone_status_filter(self, client, db, make_user, make_project, auth_header, seed_roles_and_permissions, make_member):
        """Filter milestones by status."""
        admin_role, mgr_role, dev_role = seed_roles_and_permissions
        user = make_user()
        project = make_project()
        make_member(project.id, user.id, dev_role.id)
        
        from app.models.milestone import Milestone, MilestoneStatus
        open_ms = Milestone(title="Open", project_id=project.id, status=MilestoneStatus.OPEN)
        closed_ms = Milestone(title="Closed", project_id=project.id, status=MilestoneStatus.CLOSED)
        db.add_all([open_ms, closed_ms])
        db.commit()
        
        resp = client.get(
            f"/projects/{project.id}/milestones?status=open",
            headers=auth_header(user)
        )
        assert resp.status_code == 200
        data = resp.json()
        assert all(m["status"] == "open" for m in data)