// Copyright (c) The OpenTofu Authors
// SPDX-License-Identifier: MPL-2.0
// Copyright (c) 2023 HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

package attribute_path

import "testing"

func TestPathMatcher_FollowsPath(t *testing.T) {
	var matcher Matcher

	matcher = &PathMatcher{
		Paths: [][]any{
			{
				float64(0),
				"key",
				float64(0),
			},
		},
	}

	if matcher.Matches() {
		t.Errorf("should not have exact matched at base level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at base level")
	}

	if matcher := matcher.GetChildWithKey("key"); matcher.MatchesPartial() {
		t.Errorf("should not have matched string key in first step (it's actually an index step)")
	}

	matcher = matcher.GetChildWithIndex(0)

	if matcher.Matches() {
		t.Errorf("should not have exact matched at first level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at first level")
	}

	matcher = matcher.GetChildWithKey("key")

	if matcher.Matches() {
		t.Errorf("should not have exact matched at second level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at second level")
	}

	matcher = matcher.GetChildWithIndex(0)

	if !matcher.Matches() {
		t.Errorf("should have exact matched at leaf level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at leaf level")
	}
}

func TestPathMatcher_HandlesListIndexWithString(t *testing.T) {
	t.Run("convertible", func(t *testing.T) {
		var matcher Matcher
		matcher = &PathMatcher{
			Paths: [][]any{
				{
					"0",
					"key",
				},
			},
		}

		matcher = matcher.GetChildWithIndex(0)
		if matcher.Matches() {
			t.Errorf("should not have exact matched at first level")
		}
		if !matcher.MatchesPartial() {
			t.Errorf("should have partial matched at first level")
		}

		matcher = matcher.GetChildWithKey("key")
		if !matcher.Matches() {
			t.Errorf("should have exact matched at second level")
		}
		if !matcher.MatchesPartial() {
			t.Errorf("should have partial matched at second level")
		}

	})
	t.Run("not convertible", func(t *testing.T) {
		var matcher Matcher
		matcher = &PathMatcher{
			Paths: [][]any{
				{
					"not a number",
					"key",
				},
			},
		}

		// The main thing we're testing here is actually that this
		// succeeds without crashing, since we should treat the non-number
		// step as a non-match. This is to allow for situations where there
		// is an invalid reference to something that can only be
		// dynamically-typechecked from in a "try" or "can" function call,
		// which can cause invalid paths to appear in a matcher even though
		// planning otherwise succeeded.
		matcher = matcher.GetChildWithIndex(0)
		if matcher.Matches() {
			t.Errorf("should not have exact matched at first level")
		}
		if matcher.MatchesPartial() {
			t.Errorf("should not have partial matched at first level")
		}
	})
}

func TestPathMatcher_Propagates(t *testing.T) {
	var matcher Matcher

	matcher = &PathMatcher{
		Paths: [][]any{
			{
				float64(0),
				"key",
			},
		},
		Propagate: true,
	}

	if matcher.Matches() {
		t.Errorf("should not have exact matched at base level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at base level")
	}

	if matcher := matcher.GetChildWithKey("key"); matcher.MatchesPartial() {
		t.Errorf("should not have matched string key in first step (it's actually an index step)")
	}

	matcher = matcher.GetChildWithIndex(0)

	if matcher.Matches() {
		t.Errorf("should not have exact matched at first level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at first level")
	}

	matcher = matcher.GetChildWithKey("key")

	if !matcher.Matches() {
		t.Errorf("should have exact matched at second level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at second level")
	}

	matcher = matcher.GetChildWithIndex(0)

	if !matcher.Matches() {
		t.Errorf("should have exact matched at leaf level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at leaf level")
	}
}
func TestPathMatcher_DoesNotPropagate(t *testing.T) {
	var matcher Matcher

	matcher = &PathMatcher{
		Paths: [][]interface{}{
			{
				float64(0),
				"key",
			},
		},
	}

	if matcher.Matches() {
		t.Errorf("should not have exact matched at base level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at base level")
	}

	matcher = matcher.GetChildWithIndex(0)

	if matcher.Matches() {
		t.Errorf("should not have exact matched at first level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at first level")
	}

	matcher = matcher.GetChildWithKey("key")

	if !matcher.Matches() {
		t.Errorf("should have exact matched at second level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at second level")
	}

	matcher = matcher.GetChildWithIndex(0)

	if matcher.Matches() {
		t.Errorf("should not have exact matched at leaf level")
	}
	if matcher.MatchesPartial() {
		t.Errorf("should not have partial matched at leaf level")
	}
}

func TestPathMatcher_BreaksPath(t *testing.T) {
	var matcher Matcher

	matcher = &PathMatcher{
		Paths: [][]interface{}{
			{
				float64(0),
				"key",
				float64(0),
			},
		},
	}

	if matcher.Matches() {
		t.Errorf("should not have exact matched at base level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at base level")
	}

	matcher = matcher.GetChildWithIndex(0)

	if matcher.Matches() {
		t.Errorf("should not have exact matched at first level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at first level")
	}

	matcher = matcher.GetChildWithKey("invalid")

	if matcher.Matches() {
		t.Errorf("should not have exact matched at second level")
	}
	if matcher.MatchesPartial() {
		t.Errorf("should not have partial matched at second level")

	}
}

func TestPathMatcher_MultiplePaths(t *testing.T) {
	var matcher Matcher

	matcher = &PathMatcher{
		Paths: [][]interface{}{
			{
				float64(0),
				"key",
				float64(0),
			},
			{
				float64(0),
				"key",
				float64(1),
			},
		},
	}

	if matcher.Matches() {
		t.Errorf("should not have exact matched at base level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at base level")
	}

	matcher = matcher.GetChildWithIndex(0)

	if matcher.Matches() {
		t.Errorf("should not have exact matched at first level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at first level")
	}

	matcher = matcher.GetChildWithKey("key")

	if matcher.Matches() {
		t.Errorf("should not have exact matched at second level")
	}
	if !matcher.MatchesPartial() {
		t.Errorf("should have partial matched at second level")
	}

	validZero := matcher.GetChildWithIndex(0)
	validOne := matcher.GetChildWithIndex(1)
	invalid := matcher.GetChildWithIndex(2)

	if !validZero.Matches() {
		t.Errorf("should have exact matched at leaf level")
	}
	if !validZero.MatchesPartial() {
		t.Errorf("should have partial matched at leaf level")
	}

	if !validOne.Matches() {
		t.Errorf("should have exact matched at leaf level")
	}
	if !validOne.MatchesPartial() {
		t.Errorf("should have partial matched at leaf level")
	}

	if invalid.Matches() {
		t.Errorf("should not have exact matched at leaf level")
	}
	if invalid.MatchesPartial() {
		t.Errorf("should not have partial matched at leaf level")
	}
}