package format

import (
	"encoding/json"
	"errors"
	"strings"
	"testing"

	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
)

func TestTextFormatterIncludesPreparedRunDetails(t *testing.T) {
	prepared := samplePreparedRun()

	out, err := FormatPreparedRun(prepared, PreparedRunFormatText)
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}
	s := string(out)

	for _, want := range []string{
		"prompt: prompt.id",
		"prompt_version: v1",
		"selected_profile_id: local-fast",
		"endpoint: http://llm/v1",
		"model: gpt-test",
		"temperature: 0.4",
		"max_tokens: 256",
		"top_p: 0.8",
		"timeout_seconds: 45",
		"service_tier: priority",
		"reasoning_effort: medium",
		"api_key_env: SCRIPTORIUM_API_KEY",
		"prompt_hash: prompt-hash",
		"rendered_prompt_hash: rendered-hash",
		"glossary: hash-glossary",
		"transcript: hash-transcript",
		"messages:",
		"  system:",
		"  user:",
		"System guidance.",
		"Summarize the transcript.",
		"Include key entities.",
		"Second user message.",
	} {
		if !strings.Contains(s, want) {
			t.Fatalf("expected text output to include %q, got:\n%s", want, s)
		}
	}
}

func TestTextFormatterDoesNotIncludeResolvedAPIKeyValue(t *testing.T) {
	const secret = "super-secret-api-key"
	t.Setenv("SCRIPTORIUM_API_KEY", secret)

	out, err := FormatPreparedRun(samplePreparedRun(), PreparedRunFormatText)
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}
	if strings.Contains(string(out), secret) {
		t.Fatalf("text output should not include resolved api key value: %s", out)
	}
}

func TestJSONFormatterEmitsValidJSONAndIncludesPreparedRunFields(t *testing.T) {
	prepared := samplePreparedRun()

	out, err := FormatPreparedRun(prepared, PreparedRunFormatJSON)
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}

	var decoded map[string]any
	if err := json.Unmarshal(out, &decoded); err != nil {
		t.Fatalf("expected valid json output, got %v", err)
	}

	if decoded["prompt_id"] != "prompt.id" {
		t.Fatalf("expected prompt_id in json output, got %#v", decoded["prompt_id"])
	}
	if decoded["prompt_version"] != "v1" {
		t.Fatalf("expected prompt_version in json output, got %#v", decoded["prompt_version"])
	}
	if decoded["selected_profile_id"] != "local-fast" {
		t.Fatalf("expected selected_profile_id in json output, got %#v", decoded["selected_profile_id"])
	}
	if decoded["rendered_prompt_hash"] != "rendered-hash" {
		t.Fatalf("expected rendered_prompt_hash in json output, got %#v", decoded["rendered_prompt_hash"])
	}
	if _, ok := decoded["effective_model_params"]; !ok {
		t.Fatalf("expected effective_model_params in json output, got %#v", decoded)
	}
	if _, ok := decoded["input_hashes"]; !ok {
		t.Fatalf("expected input_hashes in json output, got %#v", decoded)
	}
	if _, ok := decoded["messages"]; !ok {
		t.Fatalf("expected messages in json output, got %#v", decoded)
	}
}

func TestJSONFormatterDoesNotIncludeResolvedAPIKeyValue(t *testing.T) {
	const secret = "super-secret-api-key"
	t.Setenv("SCRIPTORIUM_API_KEY", secret)

	out, err := FormatPreparedRun(samplePreparedRun(), PreparedRunFormatJSON)
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}
	if strings.Contains(string(out), secret) {
		t.Fatalf("json output should not include resolved api key value: %s", out)
	}
}

func TestParsePreparedRunOutputFormatRecognizesSupportedNames(t *testing.T) {
	tests := []struct {
		name  string
		input string
		want  PreparedRunOutputFormat
	}{
		{name: "default empty", input: "", want: DefaultPreparedRunOutputFormat},
		{name: "text", input: "text", want: PreparedRunFormatText},
		{name: "json", input: "json", want: PreparedRunFormatJSON},
		{name: "trim and case", input: "  JSON  ", want: PreparedRunFormatJSON},
	}

	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			got, err := ParsePreparedRunOutputFormat(tc.input)
			if err != nil {
				t.Fatalf("expected no error, got %v", err)
			}
			if got != tc.want {
				t.Fatalf("expected %q, got %q", tc.want, got)
			}
		})
	}
}

func TestParsePreparedRunOutputFormatUnknownFails(t *testing.T) {
	_, err := ParsePreparedRunOutputFormat("yaml")
	if err == nil {
		t.Fatal("expected error for unknown format")
	}
	if !errors.Is(err, ErrUnknownPreparedRunFormat) {
		t.Fatalf("expected ErrUnknownPreparedRunFormat, got %v", err)
	}
}

func TestFormatPreparedRunByNameUnknownFailsClearly(t *testing.T) {
	_, err := FormatPreparedRunByName(samplePreparedRun(), "yaml")
	if err == nil {
		t.Fatal("expected unknown format error")
	}
	if !errors.Is(err, ErrUnknownPreparedRunFormat) {
		t.Fatalf("expected ErrUnknownPreparedRunFormat, got %v", err)
	}
}

func samplePreparedRun() *domain.PreparedRun {
	return &domain.PreparedRun{
		PromptID:          "prompt.id",
		PromptVersion:     "v1",
		PromptHash:        "prompt-hash",
		SelectedProfileID: "local-fast",
		EffectiveModelParams: domain.ExecutionTarget{
			Endpoint:        "http://llm/v1",
			Model:           "gpt-test",
			Temperature:     0.4,
			MaxTokens:       256,
			TopP:            0.8,
			TimeoutSeconds:  45,
			ServiceTier:     "priority",
			ReasoningEffort: "medium",
			APIKeyEnv:       "SCRIPTORIUM_API_KEY",
		},
		InputHashes: map[string]string{
			"transcript": "hash-transcript",
			"glossary":   "hash-glossary",
		},
		RenderedPromptHash: "rendered-hash",
		Messages: []domain.RenderedMessage{
			{Role: "system", Content: "System guidance."},
			{Role: "user", Content: "Summarize the transcript.\nInclude key entities."},
			{Role: "user", Content: "Second user message."},
		},
	}
}