package profile

import (
	"context"
	"errors"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestFilesystemRepository_GetProfile(t *testing.T) {
	tmpDir, err := os.MkdirTemp("", "execution_profile_test")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(tmpDir)

	files, err := os.ReadDir("testdata")
	if err != nil {
		t.Fatalf("failed to read testdata: %v", err)
	}
	for _, f := range files {
		src := filepath.Join("testdata", f.Name())
		dst := filepath.Join(tmpDir, f.Name())
		data, err := os.ReadFile(src)
		if err != nil {
			t.Fatal(err)
		}
		if err := os.WriteFile(dst, data, 0644); err != nil {
			t.Fatal(err)
		}
	}

	repo := NewFilesystemRepository(tmpDir)
	ctx := context.Background()

	t.Run("valid local profile", func(t *testing.T) {
		p, err := repo.GetProfile(ctx, "local-default")
		if err != nil {
			t.Fatalf("expected no error, got %v", err)
		}
		if p.ID != "local-default" {
			t.Fatalf("unexpected id: %q", p.ID)
		}
		if p.Endpoint == "" || p.Model == "" {
			t.Fatalf("expected endpoint/model to be set: %+v", p)
		}
	})

	t.Run("valid profile with api_key_env", func(t *testing.T) {
		p, err := repo.GetProfile(ctx, "local-secure")
		if err != nil {
			t.Fatalf("expected no error, got %v", err)
		}
		if p.APIKeyEnv != "SCRIPTORIUM_API_KEY" {
			t.Fatalf("unexpected api_key_env: %q", p.APIKeyEnv)
		}
		if p.ReasoningEffort != "medium" {
			t.Fatalf("unexpected reasoning_effort: %q", p.ReasoningEffort)
		}
		if p.ServiceTier != "priority" {
			t.Fatalf("unexpected service_tier: %q", p.ServiceTier)
		}
	})

	t.Run("valid nested profile", func(t *testing.T) {
		nestedDir := filepath.Join(tmpDir, "local")
		if err := os.MkdirAll(nestedDir, 0o755); err != nil {
			t.Fatal(err)
		}
		writeProfileTestFile(t, filepath.Join(nestedDir, "nested-local.yaml"), `
id: nested-local
endpoint: http://localhost:8000/v1
model: nested-model
temperature: 0.1
`)

		p, err := repo.GetProfile(ctx, "nested-local")
		if err != nil {
			t.Fatalf("expected no error, got %v", err)
		}
		if p.Model != "nested-model" {
			t.Fatalf("unexpected model: %q", p.Model)
		}
	})

	t.Run("duplicate profile IDs fail as ambiguous", func(t *testing.T) {
		writeProfileTestFile(t, filepath.Join(tmpDir, "duplicate-profile-a.yaml"), `
id: duplicate-profile
endpoint: http://localhost:8000/v1
model: first-model
`)
		nestedDir := filepath.Join(tmpDir, "duplicates")
		if err := os.MkdirAll(nestedDir, 0o755); err != nil {
			t.Fatal(err)
		}
		writeProfileTestFile(t, filepath.Join(nestedDir, "duplicate-profile-b.yaml"), `
id: duplicate-profile
endpoint: http://localhost:8000/v1
model: second-model
`)

		_, err := repo.GetProfile(ctx, "duplicate-profile")
		if !errors.Is(err, ErrInvalidProfile) {
			t.Fatalf("expected duplicate profile to return ErrInvalidProfile, got %v", err)
		}
		for _, want := range []string{"duplicate execution profile id", "duplicate-profile-a.yaml", filepath.Join("duplicates", "duplicate-profile-b.yaml")} {
			if !strings.Contains(err.Error(), want) {
				t.Fatalf("expected error to contain %q, got %v", want, err)
			}
		}
	})

	t.Run("nested raw api_key rejected for likely target file", func(t *testing.T) {
		nestedDir := filepath.Join(tmpDir, "secure")
		if err := os.MkdirAll(nestedDir, 0o755); err != nil {
			t.Fatal(err)
		}
		writeProfileTestFile(t, filepath.Join(nestedDir, "not_named_like_id.yaml"), `
id: nested_raw_api_key
endpoint: http://localhost:8000/v1
model: m
api_key: secret
`)

		_, err := repo.GetProfile(ctx, "nested_raw_api_key")
		if !errors.Is(err, ErrRawAPIKeyNotAllowed) {
			t.Fatalf("expected ErrRawAPIKeyNotAllowed, got %v", err)
		}
		if !strings.Contains(err.Error(), filepath.Join("secure", "not_named_like_id.yaml")) {
			t.Fatalf("expected nested path in error, got %v", err)
		}
	})

	t.Run("invalid yaml", func(t *testing.T) {
		_, err := repo.GetProfile(ctx, "invalid_yaml")
		if !errors.Is(err, ErrInvalidYAML) {
			t.Fatalf("expected ErrInvalidYAML, got %v", err)
		}
	})

	t.Run("missing id", func(t *testing.T) {
		_, err := repo.GetProfile(ctx, "missing_id")
		if !errors.Is(err, ErrProfileNotFound) {
			t.Fatalf("expected ErrProfileNotFound, got %v", err)
		}
	})

	t.Run("missing endpoint", func(t *testing.T) {
		_, err := repo.GetProfile(ctx, "missing-endpoint")
		if !errors.Is(err, ErrInvalidProfile) {
			t.Fatalf("expected ErrInvalidProfile, got %v", err)
		}
	})

	t.Run("missing model", func(t *testing.T) {
		_, err := repo.GetProfile(ctx, "missing-model")
		if !errors.Is(err, ErrInvalidProfile) {
			t.Fatalf("expected ErrInvalidProfile, got %v", err)
		}
	})

	t.Run("unknown field", func(t *testing.T) {
		_, err := repo.GetProfile(ctx, "unknown_field")
		if !errors.Is(err, ErrInvalidYAML) {
			t.Fatalf("expected ErrInvalidYAML for strict decode unknown field, got %v", err)
		}
	})

	t.Run("raw api_key rejected", func(t *testing.T) {
		_, err := repo.GetProfile(ctx, "raw_api_key")
		if !errors.Is(err, ErrRawAPIKeyNotAllowed) {
			t.Fatalf("expected ErrRawAPIKeyNotAllowed, got %v", err)
		}
	})

	t.Run("profile not found", func(t *testing.T) {
		_, err := repo.GetProfile(ctx, "does-not-exist")
		if !errors.Is(err, ErrProfileNotFound) {
			t.Fatalf("expected ErrProfileNotFound, got %v", err)
		}
	})
}

func writeProfileTestFile(t *testing.T, path string, content string) {
	t.Helper()
	if err := os.WriteFile(path, []byte(strings.TrimLeft(content, "\n")), 0o644); err != nil {
		t.Fatalf("failed to write profile test file %q: %v", path, err)
	}
}