package mcpgen

import (
	"os"
	"testing"

	fwmanifest "forge.lclr.dev/AI/mcp-framework/manifest"
)

func TestGeneratedManifestFallsBackToEmbeddedRootManifest(t *testing.T) {
	previousDir, err := os.Getwd()
	if err != nil {
		t.Fatalf("Getwd returned error: %v", err)
	}
	if err := os.Chdir(t.TempDir()); err != nil {
		t.Fatalf("Chdir temp dir returned error: %v", err)
	}
	t.Cleanup(func() {
		if err := os.Chdir(previousDir); err != nil {
			t.Fatalf("restore working directory: %v", err)
		}
	})

	manifestFile, source, err := LoadManifest(".")
	if err != nil {
		t.Fatalf("LoadManifest returned error: %v", err)
	}

	if source != fwmanifest.EmbeddedSource {
		t.Fatalf("source = %q, want %q", source, fwmanifest.EmbeddedSource)
	}
	if manifestFile.BinaryName != "email-mcp" {
		t.Fatalf("BinaryName = %q, want email-mcp", manifestFile.BinaryName)
	}
	if len(manifestFile.Config.Fields) != 3 {
		t.Fatalf("config fields = %d, want 3", len(manifestFile.Config.Fields))
	}
	if manifestFile.SecretStore.BackendPolicy != "bitwarden-cli" {
		t.Fatalf("secret store backend policy = %q, want bitwarden-cli", manifestFile.SecretStore.BackendPolicy)
	}
}

func TestGeneratedConfigHelpersExposeIMAPResolutionFields(t *testing.T) {
	specs := ResolveFieldSpecs("work")
	if len(specs) != 3 {
		t.Fatalf("ResolveFieldSpecs returned %d fields, want 3", len(specs))
	}

	if specs[0].Name != "host" || specs[0].EnvKey != "EMAIL_MCP_HOST" || specs[0].ConfigKey != "host" {
		t.Fatalf("host spec = %+v", specs[0])
	}
	if specs[1].Name != "username" || specs[1].EnvKey != "EMAIL_MCP_USERNAME" || specs[1].ConfigKey != "username" {
		t.Fatalf("username spec = %+v", specs[1])
	}
	if specs[2].Name != "password" || specs[2].EnvKey != "EMAIL_MCP_PASSWORD" || specs[2].SecretKey != "imap-password/work" {
		t.Fatalf("password spec = %+v", specs[2])
	}
}

func TestGeneratedManifestPrefersRootFileWhenPresent(t *testing.T) {
	manifestFile, source, err := LoadManifest(".")
	if err != nil {
		t.Fatalf("LoadManifest returned error: %v", err)
	}
	if source == fwmanifest.EmbeddedSource {
		t.Fatalf("source = %q, want root manifest path", source)
	}
	if manifestFile.BinaryName != "email-mcp" {
		t.Fatalf("BinaryName = %q, want email-mcp", manifestFile.BinaryName)
	}
}