// SPDX-FileCopyrightText: 2019 The Go Language Server Authors
// SPDX-License-Identifier: BSD-3-Clause

package protocol

import (
	"strconv"

	"github.com/a-h/templ/lsp/uri"
)

// WorkspaceFolder response of Workspace folders request.
type WorkspaceFolder struct {
	// URI is the associated URI for this workspace folder.
	URI string `json:"uri"`

	// Name is the name of the workspace folder. Used to refer to this
	// workspace folder in the user interface.
	Name string `json:"name"`
}

// DidChangeWorkspaceFoldersParams params of DidChangeWorkspaceFolders notification.
type DidChangeWorkspaceFoldersParams struct {
	// Event is the actual workspace folder change event.
	Event WorkspaceFoldersChangeEvent `json:"event"`
}

// WorkspaceFoldersChangeEvent is the workspace folder change event.
type WorkspaceFoldersChangeEvent struct {
	// Added is the array of added workspace folders
	Added []WorkspaceFolder `json:"added"`

	// Removed is the array of the removed workspace folders
	Removed []WorkspaceFolder `json:"removed"`
}

// DidChangeConfigurationParams params of DidChangeConfiguration notification.
type DidChangeConfigurationParams struct {
	// Settings is the actual changed settings
	Settings any `json:"settings,omitempty"`
}

// ConfigurationParams params of Configuration request.
type ConfigurationParams struct {
	Items []ConfigurationItem `json:"items"`
}

// ConfigurationItem a ConfigurationItem consists of the configuration section to ask for and an additional scope URI.
// The configuration section ask for is defined by the server and doesn’t necessarily need to correspond to the configuration store used be the client.
// So a server might ask for a configuration cpp.formatterOptions but the client stores the configuration in a XML store layout differently.
// It is up to the client to do the necessary conversion. If a scope URI is provided the client should return the setting scoped to the provided resource.
// If the client for example uses EditorConfig to manage its settings the configuration should be returned for the passed resource URI. If the client can’t provide a configuration setting for a given scope then null need to be present in the returned array.
type ConfigurationItem struct {
	// ScopeURI is the scope to get the configuration section for.
	ScopeURI uri.URI `json:"scopeUri,omitempty"`

	// Section is the configuration section asked for.
	Section string `json:"section,omitempty"`
}

// DidChangeWatchedFilesParams params of DidChangeWatchedFiles notification.
type DidChangeWatchedFilesParams struct {
	// Changes is the actual file events.
	Changes []*FileEvent `json:"changes,omitempty"`
}

// FileEvent an event describing a file change.
type FileEvent struct {
	// Type is the change type.
	Type FileChangeType `json:"type"`

	// URI is the file's URI.
	URI uri.URI `json:"uri"`
}

// FileChangeType is the file event type.
type FileChangeType float64

const (
	// FileChangeTypeCreated is the file got created.
	FileChangeTypeCreated FileChangeType = 1
	// FileChangeTypeChanged is the file got changed.
	FileChangeTypeChanged FileChangeType = 2
	// FileChangeTypeDeleted is the file got deleted.
	FileChangeTypeDeleted FileChangeType = 3
)

// String implements fmt.Stringer.
func (t FileChangeType) String() string {
	switch t {
	case FileChangeTypeCreated:
		return "Created"
	case FileChangeTypeChanged:
		return "Changed"
	case FileChangeTypeDeleted:
		return "Deleted"
	default:
		return strconv.FormatFloat(float64(t), 'f', -10, 64)
	}
}

// DidChangeWatchedFilesRegistrationOptions describe options to be used when registering for file system change events.
type DidChangeWatchedFilesRegistrationOptions struct {
	// Watchers is the watchers to register.
	Watchers []FileSystemWatcher `json:"watchers"`
}

// FileSystemWatcher watchers of DidChangeWatchedFiles Registration options.
type FileSystemWatcher struct {
	// GlobPattern is the glob pattern to watch.
	//
	// Glob patterns can have the following syntax:
	// - `*` to match one or more characters in a path segment
	// - `?` to match on one character in a path segment
	// - `**` to match any number of path segments, including none
	// - `{}` to group conditions (e.g. `**/*.{ts,js}` matches all TypeScript and JavaScript files)
	// - `[]` to declare a range of characters to match in a path segment (e.g., `example.[0-9]` to match on `example.0`, `example.1`, …)
	// - `[!...]` to negate a range of characters to match in a path segment (e.g., `example.[!0-9]` to match on `example.a`, `example.b`, but not `example.0`)
	GlobPattern string `json:"globPattern"`

	// Kind is the kind of events of interest. If omitted it defaults
	// to WatchKind.Create | WatchKind.Change | WatchKind.Delete
	// which is 7.
	Kind WatchKind `json:"kind,omitempty"`
}

// WatchKind kind of FileSystemWatcher kind.
type WatchKind float64

const (
	// WatchKindCreate interested in create events.
	WatchKindCreate WatchKind = 1

	// WatchKindChange interested in change events.
	WatchKindChange WatchKind = 2

	// WatchKindDelete interested in delete events.
	WatchKindDelete WatchKind = 4
)

// String implements fmt.Stringer.
func (k WatchKind) String() string {
	switch k {
	case WatchKindCreate:
		return "Create"
	case WatchKindChange:
		return "Change"
	case WatchKindDelete:
		return "Delete"
	default:
		return strconv.FormatFloat(float64(k), 'f', -10, 64)
	}
}

// WorkspaceSymbolParams is the parameters of a Workspace Symbol request.
type WorkspaceSymbolParams struct {
	WorkDoneProgressParams
	PartialResultParams

	// Query a query string to filter symbols by.
	//
	// Clients may send an empty string here to request all symbols.
	Query string `json:"query"`
}

// ExecuteCommandParams params of Execute a command.
type ExecuteCommandParams struct {
	WorkDoneProgressParams

	// Command is the identifier of the actual command handler.
	Command string `json:"command"`

	// Arguments that the command should be invoked with.
	Arguments []any `json:"arguments,omitempty"`
}

// ExecuteCommandRegistrationOptions execute command registration options.
type ExecuteCommandRegistrationOptions struct {
	// Commands is the commands to be executed on the server
	Commands []string `json:"commands"`
}

// ApplyWorkspaceEditParams params of Applies a WorkspaceEdit.
type ApplyWorkspaceEditParams struct {
	// Label an optional label of the workspace edit. This label is
	// presented in the user interface for example on an undo
	// stack to undo the workspace edit.
	Label string `json:"label,omitempty"`

	// Edit is the edits to apply.
	Edit WorkspaceEdit `json:"edit"`
}

// ApplyWorkspaceEditResponse response of Applies a WorkspaceEdit.
type ApplyWorkspaceEditResponse struct {
	// Applied indicates whether the edit was applied or not.
	Applied bool `json:"applied"`

	// FailureReason an optional textual description for why the edit was not applied.
	// This may be used by the server for diagnostic logging or to provide
	// a suitable error for a request that triggered the edit.
	//
	// @since 3.16.0.
	FailureReason string `json:"failureReason,omitempty"`

	// FailedChange depending on the client's failure handling strategy "failedChange"
	// might contain the index of the change that failed. This property is
	// only available if the client signals a "failureHandlingStrategy"
	// in its client capabilities.
	//
	// @since 3.16.0.
	FailedChange uint32 `json:"failedChange,omitempty"`
}
