// Copyright 2016-2018, Pulumi Corporation.  All rights reserved.

// Package apitype contains the full set of "exchange types" that are serialized and sent across separately versionable
// boundaries, including service APIs, plugins, and file formats.  As a result, we must consider the versioning impacts
// for each change we make to types within this package.  In general, this means the following:
//
//     1) DO NOT take anything away
//     2) DO NOT change processing rules
//     3) DO NOT make optional things required
//     4) DO make anything new be optional
//
// In the event that this is not possible, a breaking change is implied.  The preferred approach is to never make
// breaking changes.  If that isn't possible, the next best approach is to support both the old and new formats
// side-by-side (for instance, by using a union type for the property in question).
package apitype

import (
	"encoding/json"
	"time"

	"github.com/pulumi/pulumi/pkg/resource"
	"github.com/pulumi/pulumi/pkg/resource/config"
	"github.com/pulumi/pulumi/pkg/tokens"
	"github.com/pulumi/pulumi/pkg/workspace"
)

// We alias the latest versions of the various types below to their friendly names here.

type Checkpoint = CheckpointV1
type Deployment = DeploymentV1
type Manifest = ManifestV1
type PluginInfo = PluginInfoV1
type Resource = ResourceV1

// VersionedCheckpoint is a version number plus a json document. The version number describes what
// version of the Checkpoint structure the Checkpoint member's json document can decode into.
type VersionedCheckpoint struct {
	Version    int             `json:"version"`
	Checkpoint json.RawMessage `json:"checkpoint"`
}

// CheckpointV1 is a serialized deployment target plus a record of the latest deployment.
type CheckpointV1 struct {
	// Stack is the stack to update.
	Stack tokens.QName `json:"stack" yaml:"stack"`
	// Config contains a bag of optional configuration keys/values.
	Config config.Map `json:"config,omitempty" yaml:"config,omitempty"`
	// Latest is the latest/current deployment (if an update has occurred).
	Latest *DeploymentV1 `json:"latest,omitempty" yaml:"latest,omitempty"`
}

// DeploymentV1 represents a deployment that has actually occurred. It is similar to the engine's snapshot structure,
// except that it flattens and rearranges a few data structures for serializability.
type DeploymentV1 struct {
	// Manifest contains metadata about this deployment.
	Manifest ManifestV1 `json:"manifest" yaml:"manifest"`
	// Resources contains all resources that are currently part of this stack after this deployment has finished.
	Resources []ResourceV1 `json:"resources,omitempty" yaml:"resources,omitempty"`
}

// UntypedDeployment contains an inner, untyped deployment structure.
type UntypedDeployment struct {
	// Version indicates the schema of the encoded deployment.
	Version int `json:"version,omitempty"`
	// The opaque Pulumi deployment. This is conceptually of type `Deployment`, but we use `json.Message` to
	// permit round-tripping of stack contents when an older client is talking to a newer server.  If we unmarshaled
	// the contents, and then remarshaled them, we could end up losing important information.
	Deployment json.RawMessage `json:"deployment,omitempty"`
}

// ResourceV1 describes a Cloud resource constructed by Pulumi.
type ResourceV1 struct {
	// URN uniquely identifying this resource.
	URN resource.URN `json:"urn" yaml:"urn"`
	// Custom is true when it is managed by a plugin.
	Custom bool `json:"custom" yaml:"custom"`
	// Delete is true when the resource should be deleted during the next update.
	Delete bool `json:"delete,omitempty" yaml:"delete,omitempty"`
	// ID is the provider-assigned resource, if any, for custom resources.
	ID resource.ID `json:"id,omitempty" yaml:"id,omitempty"`
	// Type is the resource's full type token.
	Type tokens.Type `json:"type" yaml:"type"`
	// Inputs are the input properties supplied to the provider.
	Inputs map[string]interface{} `json:"inputs,omitempty" yaml:"inputs,omitempty"`
	// Defaults contains the default values supplied by the provider (DEPRECATED, see #637).
	Defaults map[string]interface{} `json:"defaults,omitempty" yaml:"defaults,omitempty"`
	// Outputs are the output properties returned by the provider after provisioning.
	Outputs map[string]interface{} `json:"outputs,omitempty" yaml:"outputs,omitempty"`
	// Parent is an optional parent URN if this resource is a child of it.
	Parent resource.URN `json:"parent,omitempty" yaml:"parent,omitempty"`
	// Protect is set to true when this resource is "protected" and may not be deleted.
	Protect bool `json:"protect,omitempty" yaml:"protect,omitempty"`
	// Dependencies contains the dependency edges to other resources that this depends on.
	Dependencies []resource.URN `json:"dependencies" yaml:"dependencies,omitempty"`
}

// ManifestV1 captures meta-information about this checkpoint file, such as versions of binaries, etc.
type ManifestV1 struct {
	// Time of the update.
	Time time.Time `json:"time" yaml:"time"`
	// Magic number, used to identify integrity of the checkpoint.
	Magic string `json:"magic" yaml:"magic"`
	// Version of the Pulumi engine used to render the checkpoint.
	Version string `json:"version" yaml:"version"`
	// Plugins contains the binary version info of plug-ins used.
	Plugins []PluginInfoV1 `json:"plugins,omitempty" yaml:"plugins,omitempty"`
}

// PluginInfoV1 captures the version and information about a plugin.
type PluginInfoV1 struct {
	Name    string               `json:"name" yaml:"name"`
	Path    string               `json:"path" yaml:"path"`
	Type    workspace.PluginKind `json:"type" yaml:"type"`
	Version string               `json:"version" yaml:"version"`
}

// ConfigValue describes a single (possibly secret) configuration value.
type ConfigValue struct {
	// String is either the plaintext value (for non-secrets) or the base64-encoded ciphertext (for secrets).
	String string `json:"string"`
	// Secret is true if this value is a secret and false otherwise.
	Secret bool `json:"secret"`
}

// StackTagName is the key for the tags bag in stack. This is just a string, but we use a type alias to provide a richer
// description of how the string is used in our apitype definitions.
type StackTagName = string

const (
	// ProjectNameTag is a tag that represents the name of a project (coresponds to the `name` property of Pulumi.yaml).
	ProjectNameTag StackTagName = "pulumi:project"
	// ProjectRuntimeTag is a tag that represents the runtime of a project (the `runtime` property of Pulumi.yaml).
	ProjectRuntimeTag StackTagName = "pulumi:runtime"
	// ProjectDescriptionTag is a tag that represents the description of a project (Pulumi.yaml's `description`).
	ProjectDescriptionTag StackTagName = "pulumi:description"
	// GitHubOwnerNameTag is a tag that represents the name of the owner on GitHub that this stack
	// may be associated with (inferred by the CLI based on git remote info).
	GitHubOwnerNameTag StackTagName = "gitHub:owner"
	// GitHubRepositoryNameTag is a tag that represents the name of a repository on GitHub that this stack
	// may be associated with (inferred by the CLI based on git remote info).
	GitHubRepositoryNameTag StackTagName = "gitHub:repo"
)

// Stack describes a Stack running on a Pulumi Cloud.
type Stack struct {
	CloudName string `json:"cloudName"`
	OrgName   string `json:"orgName"`

	RepoName    string       `json:"repoName"`
	ProjectName string       `json:"projName"`
	StackName   tokens.QName `json:"stackName"`

	ActiveUpdate string                  `json:"activeUpdate"`
	Resources    []ResourceV1            `json:"resources,omitempty"`
	Tags         map[StackTagName]string `json:"tags,omitempty"`

	Version int `json:"version"`
}