package service

import (
	"errors"
	"io"
	"mime/multipart"

	"github.com/gin-gonic/gin"
	"github.com/langgenius/dify-plugin-daemon/internal/core/bundle_packager"
	"github.com/langgenius/dify-plugin-daemon/internal/core/plugin_manager"
	"github.com/langgenius/dify-plugin-daemon/internal/core/plugin_packager/decoder"
	"github.com/langgenius/dify-plugin-daemon/internal/types/app"
	"github.com/langgenius/dify-plugin-daemon/internal/types/entities"
	"github.com/langgenius/dify-plugin-daemon/internal/types/entities/bundle_entities"
	"github.com/langgenius/dify-plugin-daemon/internal/types/entities/plugin_entities"
	"github.com/langgenius/dify-plugin-daemon/internal/types/exception"
	"github.com/langgenius/dify-plugin-daemon/internal/utils/cache/helper"
)

func UploadPluginPkg(
	config *app.Config,
	c *gin.Context,
	tenant_id string,
	dify_pkg_file multipart.File,
	verify_signature bool,
) *entities.Response {
	pluginFile, err := io.ReadAll(dify_pkg_file)
	if err != nil {
		return exception.InternalServerError(err).ToResponse()
	}

	decoder, err := decoder.NewZipPluginDecoderWithSizeLimit(pluginFile, config.MaxPluginPackageSize)
	if err != nil {
		return exception.BadRequestError(err).ToResponse()
	}

	pluginUniqueIdentifier, err := decoder.UniqueIdentity()
	if err != nil {
		return exception.BadRequestError(err).ToResponse()
	}

	// avoid author to be a uuid
	if pluginUniqueIdentifier.RemoteLike() {
		return exception.BadRequestError(errors.New("author cannot be a uuid")).ToResponse()
	}

	manager := plugin_manager.Manager()
	declaration, err := manager.SavePackage(pluginUniqueIdentifier, pluginFile)
	if err != nil {
		return exception.BadRequestError(errors.Join(err, errors.New("failed to save package"))).ToResponse()
	}

	if config.ForceVerifyingSignature || verify_signature {
		if !declaration.Verified {
			return exception.BadRequestError(errors.Join(err, errors.New(
				"plugin verification has been enabled, and the plugin you want to install has a bad signature",
			))).ToResponse()
		}
	}

	return entities.NewSuccessResponse(map[string]any{
		"unique_identifier": pluginUniqueIdentifier,
		"manifest":          declaration,
	})
}

func UploadPluginBundle(
	config *app.Config,
	c *gin.Context,
	tenant_id string,
	dify_bundle_file multipart.File,
	verify_signature bool,
) *entities.Response {
	bundleFile, err := io.ReadAll(dify_bundle_file)
	if err != nil {
		return exception.InternalServerError(err).ToResponse()
	}

	packager, err := bundle_packager.NewMemoryZipBundlePackager(bundleFile)
	if err != nil {
		return exception.BadRequestError(errors.Join(err, errors.New("failed to decode bundle"))).ToResponse()
	}

	// load bundle
	bundle, err := packager.Manifest()
	if err != nil {
		return exception.BadRequestError(errors.Join(err, errors.New("failed to load bundle manifest"))).ToResponse()
	}

	manager := plugin_manager.Manager()

	result := []map[string]any{}

	for _, dependency := range bundle.Dependencies {
		if dependency.Type == bundle_entities.DEPENDENCY_TYPE_GITHUB {
			if dep, ok := dependency.Value.(bundle_entities.GithubDependency); ok {
				result = append(result, map[string]any{
					"type": "github",
					"value": map[string]any{
						"repo_address": dep.RepoPattern.Repo(),
						"repo":         dep.RepoPattern.GithubRepo(),
						"release":      dep.RepoPattern.Release(),
						"packages":     dep.RepoPattern.Asset(),
					},
				})
			}
		} else if dependency.Type == bundle_entities.DEPENDENCY_TYPE_MARKETPLACE {
			if dep, ok := dependency.Value.(bundle_entities.MarketplaceDependency); ok {
				result = append(result, map[string]any{
					"type": "marketplace",
					"value": map[string]any{
						"organization": dep.MarketplacePattern.Organization(),
						"plugin":       dep.MarketplacePattern.Plugin(),
						"version":      dep.MarketplacePattern.Version(),
					},
				})
			}
		} else if dependency.Type == bundle_entities.DEPENDENCY_TYPE_PACKAGE {
			if dep, ok := dependency.Value.(bundle_entities.PackageDependency); ok {
				// fetch package
				path := dep.Path
				if asset, err := packager.FetchAsset(path); err != nil {
					return exception.InternalServerError(errors.Join(errors.New("failed to fetch package from bundle"), err)).ToResponse()
				} else {
					// decode and save
					decoder, err := decoder.NewZipPluginDecoder(asset)
					if err != nil {
						return exception.BadRequestError(errors.Join(errors.New("failed to create package decoder"), err)).ToResponse()
					}

					pluginUniqueIdentifier, err := decoder.UniqueIdentity()
					if err != nil {
						return exception.BadRequestError(errors.Join(errors.New("failed to get package unique identifier"), err)).ToResponse()
					}

					declaration, err := manager.SavePackage(pluginUniqueIdentifier, asset)
					if err != nil {
						return exception.InternalServerError(errors.Join(errors.New("failed to save package"), err)).ToResponse()
					}

					if config.ForceVerifyingSignature || verify_signature {
						if !declaration.Verified {
							return exception.BadRequestError(errors.Join(errors.New(
								"plugin verification has been enabled, and the plugin you want to install has a bad signature",
							), err)).ToResponse()
						}
					}

					result = append(result, map[string]any{
						"type": "package",
						"value": map[string]any{
							"unique_identifier": pluginUniqueIdentifier,
							"manifest":          declaration,
						},
					})
				}
			}
		}
	}

	return entities.NewSuccessResponse(result)
}

func FetchPluginManifest(
	tenant_id string,
	pluginUniqueIdentifier plugin_entities.PluginUniqueIdentifier,
) *entities.Response {
	runtimeType := plugin_entities.PLUGIN_RUNTIME_TYPE_LOCAL
	if pluginUniqueIdentifier.RemoteLike() {
		runtimeType = plugin_entities.PLUGIN_RUNTIME_TYPE_REMOTE
	}

	pluginManifestCache, err := helper.CombinedGetPluginDeclaration(
		pluginUniqueIdentifier, tenant_id, runtimeType,
	)
	if err == helper.ErrPluginNotFound {
		return exception.BadRequestError(errors.New("plugin not found")).ToResponse()
	}

	if err != nil {
		return exception.InternalServerError(err).ToResponse()
	}

	return entities.NewSuccessResponse(pluginManifestCache)
}