export type ViewKey =
  | "chat"
  | "settings"
  | "models"
  | "prompts"
  | "data"
  | "about"

export type MessageRole = "user" | "assistant" | "tool"

export type RequestState =
  | "idle"
  | "requesting"
  | "generating"
  | "failed"
  | "stopped"

export type ThemeMode = "light" | "dark" | "system"

export type ReasoningEffort = "default" | "minimal" | "low" | "medium" | "high"

export type ToolChoiceMode = "auto" | "none" | "required"

export type ToolExecutionState = "pending" | "completed" | "failed"

export type TokenUsage = {
  promptTokens?: number
  completionTokens?: number
  totalTokens?: number
}

export type ModelParameters = {
  temperature: number
  maxContextLength: number
  maxOutputTokens: number
  stream: boolean
  timeoutSeconds: number
  reasoningEffort: ReasoningEffort
}

export type ChatToolCall = {
  id: string
  name: string
  arguments: string
  status?: ToolExecutionState
  result?: string
  error?: string
}

export type AskQuestionOption = {
  label: string
  value: string
  description?: string
}

export type AskQuestion = {
  id: string
  label: string
  type: "single" | "multiple" | "text"
  required?: boolean
  placeholder?: string
  options?: AskQuestionOption[]
}

export type AskQuestionsPayload = {
  title?: string
  description?: string
  questions: AskQuestion[]
}

export type AskQuestionsAnswer = {
  questionId: string
  label: string
  value: string | string[]
}

export type ChatToolDefinition = {
  type: "function"
  function: {
    name: string
    description?: string
    parameters?: Record<string, unknown>
  }
}

export type ToolSettings = {
  functionCallingEnabled: boolean
  toolChoice: ToolChoiceMode
  enabledToolIds: string[]
}

export type RuntimeConfig = {
  service?: ServiceConfig
  model?: ModelConfig
  prompt?: PromptTemplate
  modelName: string
  parameters: ModelParameters
  systemPrompt: string
  tools: ChatToolDefinition[]
  toolChoice: ToolChoiceMode
  errors: string[]
}

export type ChatMessage = {
  id: string
  role: MessageRole
  content: string
  createdAt: string
  updatedAt?: string
  status?: RequestState | "done"
  model?: string
  elapsedMs?: number
  usage?: TokenUsage
  error?: string
  reasoningContent?: string
  toolCallId?: string
  toolName?: string
  toolCalls?: ChatToolCall[]
}

export type DeepSearchSnippet = {
  messageId: string
  role: MessageRole
  excerpt: string
}

export type DeepSearchResult = {
  sessionId: string
  title: string
  updatedAt: string
  matchCount: number
  snippets: DeepSearchSnippet[]
}

export type DeepSearchState = {
  open: boolean
  query: string
  status: "idle" | "searching" | "done"
  scanned: number
  total: number
  results: DeepSearchResult[]
}

export type ServiceConfig = {
  id: string
  name: string
  baseUrl: string
  apiKey: string
  defaultModel: string
}

export type ModelConfig = {
  id: string
  name: string
  displayName: string
  serviceId?: string
  isDefault?: boolean
  parameters: ModelParameters
  updatedAt: string
}

export type PromptTemplate = {
  id: string
  title: string
  content: string
  isDefault?: boolean
  createdAt: string
  updatedAt: string
}

export type ChatSession = {
  id: string
  title: string
  createdAt: string
  updatedAt: string
  messages: ChatMessage[]
  status: RequestState
  error?: string
  serviceId?: string
  modelId?: string
  modelName?: string
  promptId?: string
  systemPrompt?: string
  temporary?: boolean
}

export type AppSettings = ModelParameters & {
  activeServiceId: string
  activeModelId: string
  systemPrompt: string
  chatQuickConfigOpen: boolean
  theme: ThemeMode
  compactMode: boolean
  fontScale: number
  showAdvanced: boolean
  proxyEnabled: boolean
  proxyUrl: string
  proxyHeaders: string
  tools: ToolSettings
  services: ServiceConfig[]
}

export type AppData = {
  version: 1
  currentSessionId: string
  sessions: ChatSession[]
  settings: AppSettings
  models: ModelConfig[]
  prompts: PromptTemplate[]
}