package model

import (
	"fmt"
	"reflect"
	"strings"
	"testing"

	"modelRT/constants"
)

func TestFuzzyRecommendOffsetUsesFullMatchedInput(t *testing.T) {
	tests := []struct {
		name         string
		searchPrefix string
		searchInput  string
		want         int
	}{
		{
			name:         "zone fuzzy prefix",
			searchPrefix: "grid000",
			searchInput:  "z",
			want:         len([]rune("grid000.z")),
		},
		{
			name:         "level one fuzzy",
			searchPrefix: "",
			searchInput:  "g",
			want:         len([]rune("g")),
		},
		{
			name:         "measurement fuzzy preserves config token",
			searchPrefix: "grid.zone.station.nspath.comp.config",
			searchInput:  "m",
			want:         len([]rune("grid.zone.station.nspath.comp.config.m")),
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := fuzzyRecommendOffset(tt.searchPrefix, tt.searchInput)
			if got != tt.want {
				t.Fatalf("expected offset %d, got %d", tt.want, got)
			}
		})
	}
}

func TestNormalizeRecommendResultsUsesInputLengthForExactCompletion(t *testing.T) {
	tests := []struct {
		name  string
		input string
	}{
		{
			name:  "full token1 to token7 structure",
			input: "grid000.zone000.station000.220kV_学府路1-testProject1.compTag.config.IA_rms_CTA-testProject1",
		},
		{
			name:  "local token4 to token7 structure",
			input: "220kV_学府路1-testProject1.IA_rms_CTA-testProject1",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			results := map[string]SearchResult{
				constants.MeasTagRecommendHierarchyType.String(): {
					RecommendType: constants.MeasTagRecommendHierarchyType,
					QueryDatas:    []string{""},
					IsFuzzy:       false,
				},
			}

			got := normalizeRecommendResults(tt.input, results)
			result := got[constants.MeasTagRecommendHierarchyType.String()]
			wantOffset := len([]rune(tt.input))
			if result.Offset != wantOffset {
				t.Fatalf("expected offset %d, got %d", wantOffset, result.Offset)
			}
			if len(result.QueryDatas) != 0 {
				t.Fatalf("expected exact completion to return no suffix, got %v", result.QueryDatas)
			}
		})
	}
}

func TestNormalizeRecommendResultsUsesInputLengthForLevelContinuation(t *testing.T) {
	tests := []struct {
		name          string
		input         string
		recommendType constants.RecommendHierarchyType
	}{
		{
			name:          "token1 grid can continue",
			input:         "grid000",
			recommendType: constants.GridRecommendHierarchyType,
		},
		{
			name:          "token1 token2 zone can continue",
			input:         "grid000.zone000",
			recommendType: constants.ZoneRecommendHierarchyType,
		},
		{
			name:          "token1 token2 token3 station can continue",
			input:         "grid000.zone000.station000",
			recommendType: constants.StationRecommendHierarchyType,
		},
		{
			name:          "token1 token2 token3 token4 nspath can continue",
			input:         "grid000.zone000.station000.110kV_TV-demoProject",
			recommendType: constants.CompNSPathRecommendHierarchyType,
		},
		{
			name:          "token1 token2 token3 token4 token5 compTag can continue",
			input:         "grid000.zone000.station000.110kV_TV-demoProject.cable_26-demoProject110kV_TV",
			recommendType: constants.CompTagRecommendHierarchyType,
		},
		{
			name:          "token1 through token6 config can continue",
			input:         "grid000.zone000.station000.110kV_TV-demoProject.cable_26-demoProject110kV_TV.base_extend",
			recommendType: constants.ConfigRecommendHierarchyType,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			results := map[string]SearchResult{
				tt.recommendType.String(): {
					RecommendType: tt.recommendType,
					QueryDatas:    []string{"."},
					IsFuzzy:       false,
				},
			}

			got := normalizeRecommendResults(tt.input, results)
			result := got[tt.recommendType.String()]
			wantOffset := len([]rune(tt.input))
			if result.Offset != wantOffset {
				t.Fatalf("expected offset %d, got %d", wantOffset, result.Offset)
			}
			if len(result.QueryDatas) != 1 || result.QueryDatas[0] != "." {
				t.Fatalf("expected level continuation '.', got %v", result.QueryDatas)
			}
		})
	}
}

func TestNormalizeRecommendResultsKeepsFallbackOffsetZero(t *testing.T) {
	input := "x"
	results := map[string]SearchResult{
		constants.GridRecommendHierarchyType.String(): {
			RecommendType: constants.GridRecommendHierarchyType,
			QueryDatas:    []string{"grid000", "grid001"},
			IsFuzzy:       true,
			IsFallback:    true,
			Offset:        0,
		},
		constants.CompNSPathRecommendHierarchyType.String(): {
			RecommendType: constants.CompNSPathRecommendHierarchyType,
			QueryDatas:    []string{"nspath000", "nspath001"},
			IsFuzzy:       true,
			IsFallback:    true,
			Offset:        0,
		},
	}

	got := normalizeRecommendResults(input, results)
	for key, result := range got {
		if result.Offset != 0 {
			t.Fatalf("expected fallback offset 0 for %s, got %d", key, result.Offset)
		}
		if len(result.QueryDatas) != 2 {
			t.Fatalf("expected fallback recommends to remain intact for %s, got %v", key, result.QueryDatas)
		}
	}
}

func TestNormalizeRecommendResultsKeepsParentPrefixOffsetForSpecificFallback(t *testing.T) {
	nsPath := "220kV_学府路1-testProject1"
	input := nsPath + ".x"
	offset := recommendPrefixOffset([]string{nsPath})
	results := map[string]SearchResult{
		constants.CompTagRecommendHierarchyType.String(): {
			RecommendType: constants.CompTagRecommendHierarchyType,
			QueryDatas: []string{
				nsPath + ".CTA-testProject1220kV_学府路1",
				nsPath + ".CB-testProject1220kV_学府路1",
			},
			IsFuzzy:    true,
			IsFallback: true,
			Offset:     offset,
		},
		constants.MeasTagRecommendHierarchyType.String(): {
			RecommendType: constants.MeasTagRecommendHierarchyType,
			QueryDatas: []string{
				nsPath + ".IA_rms_CTA-testProject1",
				nsPath + ".IB_rms_CTA-testProject1",
			},
			IsFuzzy:    true,
			IsFallback: true,
			Offset:     offset,
		},
	}

	got := normalizeRecommendResults(input, results)
	if offset != 24 {
		t.Fatalf("expected sample parent prefix offset 24, got %d", offset)
	}
	for key, result := range got {
		if result.Offset != 24 {
			t.Fatalf("expected specific fallback offset 24 for %s, got %d", key, result.Offset)
		}
		for _, recommend := range result.QueryDatas {
			if strings.HasPrefix(recommend, nsPath+".") {
				t.Fatalf("expected trimmed fallback recommend for %s, got %s", key, recommend)
			}
		}
	}
}

func TestNormalizeRecommendResultsTrimsConfigFuzzySuffixes(t *testing.T) {
	input := "110kV_TV-testProject1.cable_22-testProject1110kV_TV.base_extend.c"
	offset := len([]rune(input))
	results := map[string]SearchResult{
		constants.MeasTagRecommendHierarchyType.String(): {
			RecommendType: constants.MeasTagRecommendHierarchyType,
			QueryDatas: []string{
				input + "apacity",
				input + "ategory",
				input + "urrent",
				input + "ode",
			},
			IsFuzzy: true,
			Offset:  offset,
		},
	}

	got := normalizeRecommendResults(input, results)
	result := got[constants.MeasTagRecommendHierarchyType.String()]
	want := []string{"apacity", "ategory", "urrent", "ode"}
	if result.Offset != offset {
		t.Fatalf("expected offset %d, got %d", offset, result.Offset)
	}
	if !reflect.DeepEqual(result.QueryDatas, want) {
		t.Fatalf("expected trimmed recommends %#v, got %#v", want, result.QueryDatas)
	}
}

func TestNormalizeRecommendResultsTrimsToken4FallbackCandidates(t *testing.T) {
	nsPath := "110kV_TV-testProject1"
	input := nsPath + ".x"
	offset := recommendPrefixOffset([]string{nsPath})
	results := map[string]SearchResult{
		constants.CompTagRecommendHierarchyType.String(): {
			RecommendType: constants.CompTagRecommendHierarchyType,
			QueryDatas: []string{
				nsPath + ".cable_22-testProject1110kV_TV",
				nsPath + ".cable_23-testProject1110kV_TV",
			},
			IsFuzzy:    true,
			IsFallback: true,
			Offset:     offset,
		},
		constants.MeasTagRecommendHierarchyType.String(): {
			RecommendType: constants.MeasTagRecommendHierarchyType,
			QueryDatas: []string{
				nsPath + ".IA_rms_CTA-testProject1",
				nsPath + ".IB_rms_CTA-testProject1",
			},
			IsFuzzy:    true,
			IsFallback: true,
			Offset:     offset,
		},
	}

	got := normalizeRecommendResults(input, results)
	for key, result := range got {
		if result.Offset != offset {
			t.Fatalf("expected offset %d for %s, got %d", offset, key, result.Offset)
		}
		for _, recommend := range result.QueryDatas {
			if strings.HasPrefix(recommend, nsPath+".") {
				t.Fatalf("expected trimmed token4 fallback recommend for %s, got %s", key, recommend)
			}
		}
	}
	if got[constants.CompTagRecommendHierarchyType.String()].QueryDatas[0] != "cable_22-testProject1110kV_TV" {
		t.Fatalf("expected token5 suffixes, got %v", got[constants.CompTagRecommendHierarchyType.String()].QueryDatas)
	}
	if got[constants.MeasTagRecommendHierarchyType.String()].QueryDatas[0] != "IA_rms_CTA-testProject1" {
		t.Fatalf("expected token7 suffixes, got %v", got[constants.MeasTagRecommendHierarchyType.String()].QueryDatas)
	}
}

func TestNormalizeRecommendResultsKeepsFullAndLocalConfigMeasurementSuffixesConsistent(t *testing.T) {
	fullPrefix := "grid000.zone000.station000.110kV_TV-demoProject.cable_22-testProject1110kV_TV.base_extend"
	localPrefix := "110kV_TV-demoProject.cable_22-testProject1110kV_TV.base_extend"
	members := []string{"capacity", "category", "current"}

	fullResults := map[string]SearchResult{
		constants.MeasTagRecommendHierarchyType.String(): {
			RecommendType: constants.MeasTagRecommendHierarchyType,
			QueryDatas:    combineQueryResultByInput(constants.MeasTagRecommendHierarchyType, constants.FullRecommendLength, strings.Split(fullPrefix+".", "."), members),
			IsFuzzy:       false,
		},
	}
	localResults := map[string]SearchResult{
		constants.MeasTagRecommendHierarchyType.String(): {
			RecommendType: constants.MeasTagRecommendHierarchyType,
			QueryDatas:    combineQueryResultByInput(constants.MeasTagRecommendHierarchyType, constants.IsLocalRecommendLength, strings.Split(localPrefix+".", "."), members),
			IsFuzzy:       false,
		},
	}

	fullGot := normalizeRecommendResults(fullPrefix+".", fullResults)
	localGot := normalizeRecommendResults(localPrefix+".", localResults)
	fullRecommends := fullGot[constants.MeasTagRecommendHierarchyType.String()].QueryDatas
	localRecommends := localGot[constants.MeasTagRecommendHierarchyType.String()].QueryDatas
	if !reflect.DeepEqual(fullRecommends, localRecommends) {
		t.Fatalf("expected full/local config measurement suffixes to match, full=%#v local=%#v", fullRecommends, localRecommends)
	}
}

func TestNormalizeRecommendResultsKeepsFullAndLocalBayMeasurementSuffixesConsistent(t *testing.T) {
	fullPrefix := "grid000.zone000.station000.110kV_TV-demoProject.cable_22-testProject1110kV_TV.bay"
	localPrefix := "110kV_TV-demoProject.cable_22-testProject1110kV_TV.bay"
	members := []string{"IA_rms", "IB_rms", "IC_rms"}

	fullResults := map[string]SearchResult{
		constants.MeasTagRecommendHierarchyType.String(): {
			RecommendType: constants.MeasTagRecommendHierarchyType,
			QueryDatas:    combineQueryResultByInput(constants.MeasTagRecommendHierarchyType, constants.FullRecommendLength, strings.Split(fullPrefix+".", "."), members),
			IsFuzzy:       false,
		},
	}
	localResults := map[string]SearchResult{
		constants.MeasTagRecommendHierarchyType.String(): {
			RecommendType: constants.MeasTagRecommendHierarchyType,
			QueryDatas:    combineQueryResultByInput(constants.MeasTagRecommendHierarchyType, constants.IsLocalRecommendLength, strings.Split(localPrefix+".", "."), members),
			IsFuzzy:       false,
		},
	}

	fullGot := normalizeRecommendResults(fullPrefix+".", fullResults)
	localGot := normalizeRecommendResults(localPrefix+".", localResults)
	fullRecommends := fullGot[constants.MeasTagRecommendHierarchyType.String()].QueryDatas
	localRecommends := localGot[constants.MeasTagRecommendHierarchyType.String()].QueryDatas
	if !reflect.DeepEqual(fullRecommends, localRecommends) {
		t.Fatalf("expected full/local bay measurement suffixes to match, full=%#v local=%#v", fullRecommends, localRecommends)
	}
}

func TestRecommendGroupTokens(t *testing.T) {
	tests := []struct {
		name        string
		inputSlice  []string
		wantCompTag string
		wantConfig  string
		wantOK      bool
	}{
		{
			name:        "full token1 to token7 input",
			inputSlice:  []string{"grid000", "zone000", "station000", "nspath", "comp_tag", "base_extend", ""},
			wantCompTag: "comp_tag",
			wantConfig:  "base_extend",
			wantOK:      true,
		},
		{
			name:        "local token4 to token7 input",
			inputSlice:  []string{"nspath", "comp_tag", "component", ""},
			wantCompTag: "comp_tag",
			wantConfig:  "component",
			wantOK:      true,
		},
		{
			name:       "missing config token",
			inputSlice: []string{"nspath", ""},
			wantOK:     false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			gotCompTag, gotConfig, gotOK := recommendGroupTokens(tt.inputSlice)
			if gotOK != tt.wantOK {
				t.Fatalf("expected ok %t, got %t", tt.wantOK, gotOK)
			}
			if gotCompTag != tt.wantCompTag || gotConfig != tt.wantConfig {
				t.Fatalf("expected compTag/config %q/%q, got %q/%q", tt.wantCompTag, tt.wantConfig, gotCompTag, gotConfig)
			}
		})
	}
}

func TestConfigRecommendCompTag(t *testing.T) {
	tests := []struct {
		name       string
		inputSlice []string
		want       string
		wantOK     bool
	}{
		{
			name:       "full token1 to token6 input",
			inputSlice: []string{"grid000", "zone000", "station000", "nspath", "comp_tag", "b"},
			want:       "comp_tag",
			wantOK:     true,
		},
		{
			name:       "local token4 to token6 input",
			inputSlice: []string{"nspath", "comp_tag", "b"},
			want:       "comp_tag",
			wantOK:     true,
		},
		{
			name:       "missing comp tag",
			inputSlice: []string{"nspath"},
			wantOK:     false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, gotOK := configRecommendCompTag(tt.inputSlice)
			if gotOK != tt.wantOK {
				t.Fatalf("expected ok %t, got %t", tt.wantOK, gotOK)
			}
			if got != tt.want {
				t.Fatalf("expected compTag %q, got %q", tt.want, got)
			}
		})
	}
}

func TestFilterMembersByTrimmedPrefix(t *testing.T) {
	tests := []struct {
		name           string
		members        []string
		searchInput    string
		wantMembers    []string
		wantMatchInput string
	}{
		{
			name:           "config typo falls back to previous rune",
			members:        []string{"bay", "base_extend", "model", "rated", "stable", "component"},
			searchInput:    "bx",
			wantMembers:    []string{"bay", "base_extend"},
			wantMatchInput: "b",
		},
		{
			name:           "measurement typo falls back to previous rune",
			members:        []string{"I_A_rms", "I_B_rms", "U_A_rms"},
			searchInput:    "Ix",
			wantMembers:    []string{"I_A_rms", "I_B_rms"},
			wantMatchInput: "I",
		},
		{
			name:           "no fallback to empty prefix",
			members:        []string{"bay", "base_extend"},
			searchInput:    "x",
			wantMembers:    []string{},
			wantMatchInput: "",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			gotMembers, gotMatchInput := filterMembersByTrimmedPrefix(tt.members, tt.searchInput)
			if !reflect.DeepEqual(gotMembers, tt.wantMembers) {
				t.Fatalf("expected members %#v, got %#v", tt.wantMembers, gotMembers)
			}
			if gotMatchInput != tt.wantMatchInput {
				t.Fatalf("expected matched input %q, got %q", tt.wantMatchInput, gotMatchInput)
			}
		})
	}
}

func TestDotAndTypoInputsShareTrimmedPrefixFallback(t *testing.T) {
	tests := []struct {
		name       string
		dotInput   string
		typoInput  string
		members    []string
		wantSuffix []string
	}{
		{
			name:       "token1 grid",
			dotInput:   "g.",
			typoInput:  "gx",
			members:    []string{"grid000", "grid001", "zone000"},
			wantSuffix: []string{"grid000", "grid001"},
		},
		{
			name:       "token2 zone",
			dotInput:   "z.",
			typoInput:  "zx",
			members:    []string{"zone000", "zone001", "station000"},
			wantSuffix: []string{"zone000", "zone001"},
		},
		{
			name:       "token3 station",
			dotInput:   "s.",
			typoInput:  "sx",
			members:    []string{"station000", "station001", "zone000"},
			wantSuffix: []string{"station000", "station001"},
		},
		{
			name:       "token4 nspath",
			dotInput:   "1.",
			typoInput:  "1x",
			members:    []string{"110kV_TV-demoProject", "110kV_TV-testProject1", "220kV_TV-demoProject"},
			wantSuffix: []string{"110kV_TV-demoProject", "110kV_TV-testProject1"},
		},
		{
			name:       "token5 component tag",
			dotInput:   "c.",
			typoInput:  "cx",
			members:    []string{"cable_22-testProject1110kV_TV", "cable_26-demoProject110kV_TV", "bay"},
			wantSuffix: []string{"cable_22-testProject1110kV_TV", "cable_26-demoProject110kV_TV"},
		},
		{
			name:       "token6 config",
			dotInput:   "b.",
			typoInput:  "bx",
			members:    []string{"bay", "base_extend", "component"},
			wantSuffix: []string{"bay", "base_extend"},
		},
		{
			name:       "token7 measurement",
			dotInput:   "I.",
			typoInput:  "Ix",
			members:    []string{"IA_rms", "IB_rms", "UA_rms"},
			wantSuffix: []string{"IA_rms", "IB_rms"},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			dotSearchInput := strings.TrimSuffix(tt.dotInput, ".")
			typoSearchInput := trimLastRune(tt.typoInput)
			dotMembers, dotMatchedInput := filterMembersByTrimmedPrefix(tt.members, dotSearchInput)
			typoMembers, typoMatchedInput := filterMembersByTrimmedPrefix(tt.members, typoSearchInput)

			if dotMatchedInput != typoMatchedInput {
				t.Fatalf("expected dot and typo matched input to be equal, dot=%q typo=%q", dotMatchedInput, typoMatchedInput)
			}
			if !reflect.DeepEqual(dotMembers, typoMembers) {
				t.Fatalf("expected dot and typo members to be equal, dot=%#v typo=%#v", dotMembers, typoMembers)
			}
			if !reflect.DeepEqual(dotMembers, tt.wantSuffix) {
				t.Fatalf("expected members %#v, got %#v", tt.wantSuffix, dotMembers)
			}
		})
	}
}

func TestExactMatchChecksForInput(t *testing.T) {
	tests := []struct {
		name       string
		inputSlice []string
		want       []exactMatchCheck
	}{
		{
			name:       "token1 can be grid or local nspath",
			inputSlice: []string{"g"},
			want: []exactMatchCheck{
				{setKey: constants.RedisAllGridSetKey, member: "g"},
				{setKey: constants.RedisAllCompNSPathSetKey, member: "g"},
			},
		},
		{
			name:       "token1 token2 can be zone comp tag or nspath meas",
			inputSlice: []string{"grid000", "z"},
			want: []exactMatchCheck{
				{setKey: fmt.Sprintf(constants.RedisSpecGridZoneSetKey, "grid000"), member: "z"},
				{setKey: fmt.Sprintf(constants.RedisSpecCompNSPathCompTagSetKey, "grid000"), member: "z"},
				{setKey: constants.RedisAllCompTagSetKey, member: "z"},
				{setKey: fmt.Sprintf(constants.RedisSpecCompNSPathMeasSetKey, "grid000"), member: "z"},
			},
		},
		{
			name:       "token1 token2 token3 can be station or local config",
			inputSlice: []string{"grid000", "zone000", "s"},
			want: []exactMatchCheck{
				{setKey: fmt.Sprintf(constants.RedisSpecZoneStationSetKey, "zone000"), member: "s"},
				{setKey: constants.RedisAllConfigSetKey, member: "s"},
			},
		},
		{
			name:       "token1 token2 token3 token4 can be nspath or local meas",
			inputSlice: []string{"grid000", "zone000", "station000", "1"},
			want: []exactMatchCheck{
				{setKey: fmt.Sprintf(constants.RedisSpecStationCompNSPATHSetKey, "station000"), member: "1"},
				{setKey: fmt.Sprintf(constants.RedisSpecCompTagMeasSetKey, "zone000"), member: "1"},
			},
		},
		{
			name:       "token1 through token5 component tag",
			inputSlice: []string{"grid000", "zone000", "station000", "nspath", "c"},
			want: []exactMatchCheck{
				{setKey: fmt.Sprintf(constants.RedisSpecCompNSPathCompTagSetKey, "nspath"), member: "c"},
				{setKey: constants.RedisAllCompTagSetKey, member: "c"},
			},
		},
		{
			name:       "token1 through token6 config",
			inputSlice: []string{"grid000", "zone000", "station000", "nspath", "comp_tag", "b"},
			want: []exactMatchCheck{
				{setKey: constants.RedisAllConfigSetKey, member: "b"},
			},
		},
		{
			name:       "token1 through token7 measurement",
			inputSlice: []string{"grid000", "zone000", "station000", "nspath", "comp_tag", "bay", "I"},
			want: []exactMatchCheck{
				{setKey: fmt.Sprintf(constants.RedisSpecCompTagMeasSetKey, "comp_tag"), member: "I"},
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := exactMatchChecksForInput(tt.inputSlice)
			if !reflect.DeepEqual(got, tt.want) {
				t.Fatalf("expected checks %#v, got %#v", tt.want, got)
			}
		})
	}
}

func TestFallbackSpecificSetKey(t *testing.T) {
	tests := []struct {
		name       string
		hierarchy  constants.RecommendHierarchyType
		inputSlice []string
		want       string
		wantOK     bool
	}{
		{
			name:       "zone fallback uses grid specific set",
			hierarchy:  constants.ZoneRecommendHierarchyType,
			inputSlice: []string{"grid000", "z"},
			want:       fmt.Sprintf(constants.RedisSpecGridZoneSetKey, "grid000"),
			wantOK:     true,
		},
		{
			name:       "component tag fallback uses previous nspath token",
			hierarchy:  constants.CompTagRecommendHierarchyType,
			inputSlice: []string{"grid000", "I"},
			want:       fmt.Sprintf(constants.RedisSpecCompNSPathCompTagSetKey, "grid000"),
			wantOK:     true,
		},
		{
			name:       "measurement fallback skips config token and uses component tag",
			hierarchy:  constants.MeasTagRecommendHierarchyType,
			inputSlice: []string{"nspath", "comp_tag", "config", "m"},
			want:       fmt.Sprintf(constants.RedisSpecCompTagMeasSetKey, "comp_tag"),
			wantOK:     true,
		},
		{
			name:       "config fallback has no parent specific set",
			hierarchy:  constants.ConfigRecommendHierarchyType,
			inputSlice: []string{"nspath", "comp_tag", ""},
			wantOK:     false,
		},
		{
			name:       "missing previous token",
			hierarchy:  constants.ZoneRecommendHierarchyType,
			inputSlice: []string{"z"},
			wantOK:     false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, ok := fallbackSpecificSetKey(tt.hierarchy, tt.inputSlice)
			if ok != tt.wantOK {
				t.Fatalf("expected ok %t, got %t", tt.wantOK, ok)
			}
			if got != tt.want {
				t.Fatalf("expected key %q, got %q", tt.want, got)
			}
		})
	}
}

func TestShouldFallbackToInitialRecommend(t *testing.T) {
	tests := []struct {
		input string
		want  bool
	}{
		{input: "", want: false},
		{input: ".", want: true},
		{input: ".x", want: true},
		{input: "..x", want: true},
		{input: "...x", want: true},
		{input: "grid000", want: false},
		{input: "grid000.", want: false},
		{input: "grid000.zone000", want: false},
	}

	for _, tt := range tests {
		t.Run(tt.input, func(t *testing.T) {
			got := shouldFallbackToInitialRecommend(tt.input)
			if got != tt.want {
				t.Fatalf("expected %t, got %t", tt.want, got)
			}
		})
	}
}