package mutator_test

import (
	"context"
	"runtime"
	"testing"

	"github.com/databricks/cli/bundle"
	"github.com/databricks/cli/bundle/config"
	"github.com/databricks/cli/bundle/config/mutator"
	"github.com/databricks/cli/bundle/config/resources"
	"github.com/databricks/cli/bundle/internal/bundletest"
	"github.com/databricks/cli/libs/dbr"
	"github.com/databricks/cli/libs/dyn"
	"github.com/databricks/databricks-sdk-go/service/catalog"
	"github.com/databricks/databricks-sdk-go/service/jobs"
	"github.com/stretchr/testify/require"
)

func TestApplyPresetsPrefix(t *testing.T) {
	tests := []struct {
		name   string
		prefix string
		job    *resources.Job
		want   string
	}{
		{
			name:   "add prefix to job",
			prefix: "prefix-",
			job: &resources.Job{
				JobSettings: &jobs.JobSettings{
					Name: "job1",
				},
			},
			want: "prefix-job1",
		},
		{
			name:   "add empty prefix to job",
			prefix: "",
			job: &resources.Job{
				JobSettings: &jobs.JobSettings{
					Name: "job1",
				},
			},
			want: "job1",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			b := &bundle.Bundle{
				Config: config.Root{
					Resources: config.Resources{
						Jobs: map[string]*resources.Job{
							"job1": tt.job,
						},
					},
					Presets: config.Presets{
						NamePrefix: tt.prefix,
					},
				},
			}

			ctx := context.Background()
			diag := bundle.Apply(ctx, b, mutator.ApplyPresets())

			if diag.HasError() {
				t.Fatalf("unexpected error: %v", diag)
			}

			require.Equal(t, tt.want, b.Config.Resources.Jobs["job1"].Name)
		})
	}
}

func TestApplyPresetsPrefixForUcSchema(t *testing.T) {
	tests := []struct {
		name   string
		prefix string
		schema *resources.Schema
		want   string
	}{
		{
			name:   "add prefix to schema",
			prefix: "[prefix]",
			schema: &resources.Schema{
				CreateSchema: &catalog.CreateSchema{
					Name: "schema1",
				},
			},
			want: "prefix_schema1",
		},
		{
			name:   "add empty prefix to schema",
			prefix: "",
			schema: &resources.Schema{
				CreateSchema: &catalog.CreateSchema{
					Name: "schema1",
				},
			},
			want: "schema1",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			b := &bundle.Bundle{
				Config: config.Root{
					Resources: config.Resources{
						Schemas: map[string]*resources.Schema{
							"schema1": tt.schema,
						},
					},
					Presets: config.Presets{
						NamePrefix: tt.prefix,
					},
				},
			}

			ctx := context.Background()
			diag := bundle.Apply(ctx, b, mutator.ApplyPresets())

			if diag.HasError() {
				t.Fatalf("unexpected error: %v", diag)
			}

			require.Equal(t, tt.want, b.Config.Resources.Schemas["schema1"].Name)
		})
	}
}

func TestApplyPresetsTags(t *testing.T) {
	tests := []struct {
		name string
		tags map[string]string
		job  *resources.Job
		want map[string]string
	}{
		{
			name: "add tags to job",
			tags: map[string]string{"env": "dev"},
			job: &resources.Job{
				JobSettings: &jobs.JobSettings{
					Name: "job1",
					Tags: nil,
				},
			},
			want: map[string]string{"env": "dev"},
		},
		{
			name: "merge tags with existing job tags",
			tags: map[string]string{"env": "dev"},
			job: &resources.Job{
				JobSettings: &jobs.JobSettings{
					Name: "job1",
					Tags: map[string]string{"team": "data"},
				},
			},
			want: map[string]string{"env": "dev", "team": "data"},
		},
		{
			name: "don't override existing job tags",
			tags: map[string]string{"env": "dev"},
			job: &resources.Job{
				JobSettings: &jobs.JobSettings{
					Name: "job1",
					Tags: map[string]string{"env": "prod"},
				},
			},
			want: map[string]string{"env": "prod"},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			b := &bundle.Bundle{
				Config: config.Root{
					Resources: config.Resources{
						Jobs: map[string]*resources.Job{
							"job1": tt.job,
						},
					},
					Presets: config.Presets{
						Tags: tt.tags,
					},
				},
			}

			ctx := context.Background()
			diag := bundle.Apply(ctx, b, mutator.ApplyPresets())

			if diag.HasError() {
				t.Fatalf("unexpected error: %v", diag)
			}

			tags := b.Config.Resources.Jobs["job1"].Tags
			require.Equal(t, tt.want, tags)
		})
	}
}

func TestApplyPresetsJobsMaxConcurrentRuns(t *testing.T) {
	tests := []struct {
		name    string
		job     *resources.Job
		setting int
		want    int
	}{
		{
			name: "set max concurrent runs",
			job: &resources.Job{
				JobSettings: &jobs.JobSettings{
					Name:              "job1",
					MaxConcurrentRuns: 0,
				},
			},
			setting: 5,
			want:    5,
		},
		{
			name: "do not override existing max concurrent runs",
			job: &resources.Job{
				JobSettings: &jobs.JobSettings{
					Name:              "job1",
					MaxConcurrentRuns: 3,
				},
			},
			setting: 5,
			want:    3,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			b := &bundle.Bundle{
				Config: config.Root{
					Resources: config.Resources{
						Jobs: map[string]*resources.Job{
							"job1": tt.job,
						},
					},
					Presets: config.Presets{
						JobsMaxConcurrentRuns: tt.setting,
					},
				},
			}
			ctx := context.Background()
			diag := bundle.Apply(ctx, b, mutator.ApplyPresets())

			if diag.HasError() {
				t.Fatalf("unexpected error: %v", diag)
			}

			require.Equal(t, tt.want, b.Config.Resources.Jobs["job1"].MaxConcurrentRuns)
		})
	}
}

func TestApplyPresetsPrefixWithoutJobSettings(t *testing.T) {
	b := &bundle.Bundle{
		Config: config.Root{
			Resources: config.Resources{
				Jobs: map[string]*resources.Job{
					"job1": {}, // no jobsettings inside
				},
			},
			Presets: config.Presets{
				NamePrefix: "prefix-",
			},
		},
	}

	ctx := context.Background()
	diags := bundle.Apply(ctx, b, mutator.ApplyPresets())

	require.ErrorContains(t, diags.Error(), "job job1 is not defined")
}

func TestApplyPresetsResourceNotDefined(t *testing.T) {
	tests := []struct {
		resources config.Resources
		error     string
	}{
		{
			resources: config.Resources{
				Jobs: map[string]*resources.Job{
					"job1": {}, // no jobsettings inside
				},
			},
			error: "job job1 is not defined",
		},
		{
			resources: config.Resources{
				Pipelines: map[string]*resources.Pipeline{
					"pipeline1": {}, // no pipelinespec inside
				},
			},
			error: "pipeline pipeline1 is not defined",
		},
		{
			resources: config.Resources{
				Models: map[string]*resources.MlflowModel{
					"model1": {}, // no model inside
				},
			},
			error: "model model1 is not defined",
		},
		{
			resources: config.Resources{
				Experiments: map[string]*resources.MlflowExperiment{
					"experiment1": {}, // no experiment inside
				},
			},
			error: "experiment experiment1 is not defined",
		},
		{
			resources: config.Resources{
				ModelServingEndpoints: map[string]*resources.ModelServingEndpoint{
					"endpoint1": {}, // no CreateServingEndpoint inside
				},
				RegisteredModels: map[string]*resources.RegisteredModel{
					"model1": {}, // no CreateRegisteredModelRequest inside
				},
			},
			error: "model serving endpoint endpoint1 is not defined",
		},
		{
			resources: config.Resources{
				QualityMonitors: map[string]*resources.QualityMonitor{
					"monitor1": {}, // no CreateMonitor inside
				},
			},
			error: "quality monitor monitor1 is not defined",
		},
		{
			resources: config.Resources{
				Schemas: map[string]*resources.Schema{
					"schema1": {}, // no CreateSchema inside
				},
			},
			error: "schema schema1 is not defined",
		},
		{
			resources: config.Resources{
				Clusters: map[string]*resources.Cluster{
					"cluster1": {}, // no ClusterSpec inside
				},
			},
			error: "cluster cluster1 is not defined",
		},
	}

	for _, tt := range tests {
		t.Run(tt.error, func(t *testing.T) {
			b := &bundle.Bundle{
				Config: config.Root{
					Resources: tt.resources,
					Presets: config.Presets{
						TriggerPauseStatus: config.Paused,
					},
				},
			}

			ctx := context.Background()
			diags := bundle.Apply(ctx, b, mutator.ApplyPresets())

			require.ErrorContains(t, diags.Error(), tt.error)
		})
	}
}

func TestApplyPresetsSourceLinkedDeployment(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("this test is not applicable on Windows because source-linked mode works only in the Databricks Workspace")
	}

	testContext := context.Background()
	enabled := true
	disabled := false
	workspacePath := "/Workspace/user.name@company.com"

	tests := []struct {
		bundlePath      string
		ctx             context.Context
		name            string
		initialValue    *bool
		expectedValue   *bool
		expectedWarning string
	}{
		{
			name:          "preset enabled, bundle in Workspace, databricks runtime",
			bundlePath:    workspacePath,
			ctx:           dbr.MockRuntime(testContext, true),
			initialValue:  &enabled,
			expectedValue: &enabled,
		},
		{
			name:            "preset enabled, bundle not in Workspace, databricks runtime",
			bundlePath:      "/Users/user.name@company.com",
			ctx:             dbr.MockRuntime(testContext, true),
			initialValue:    &enabled,
			expectedValue:   &disabled,
			expectedWarning: "source-linked deployment is available only in the Databricks Workspace",
		},
		{
			name:            "preset enabled, bundle in Workspace, not databricks runtime",
			bundlePath:      workspacePath,
			ctx:             dbr.MockRuntime(testContext, false),
			initialValue:    &enabled,
			expectedValue:   &disabled,
			expectedWarning: "source-linked deployment is available only in the Databricks Workspace",
		},
		{
			name:          "preset disabled, bundle in Workspace, databricks runtime",
			bundlePath:    workspacePath,
			ctx:           dbr.MockRuntime(testContext, true),
			initialValue:  &disabled,
			expectedValue: &disabled,
		},
		{
			name:          "preset nil, bundle in Workspace, databricks runtime",
			bundlePath:    workspacePath,
			ctx:           dbr.MockRuntime(testContext, true),
			initialValue:  nil,
			expectedValue: nil,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			b := &bundle.Bundle{
				SyncRootPath: tt.bundlePath,
				Config: config.Root{
					Presets: config.Presets{
						SourceLinkedDeployment: tt.initialValue,
					},
				},
			}

			bundletest.SetLocation(b, "presets.source_linked_deployment", []dyn.Location{{File: "databricks.yml"}})
			diags := bundle.Apply(tt.ctx, b, mutator.ApplyPresets())
			if diags.HasError() {
				t.Fatalf("unexpected error: %v", diags)
			}

			if tt.expectedWarning != "" {
				require.Equal(t, tt.expectedWarning, diags[0].Summary)
				require.NotEmpty(t, diags[0].Locations)
			}

			require.Equal(t, tt.expectedValue, b.Config.Presets.SourceLinkedDeployment)
		})
	}

}