import { tool } from "@opencode-ai/plugin"
import { createDesignPackage, validateDesignPackage } from "../lib/design/designs"

export default tool({
  description:
    "Create and validate local Revela design packages generated by the AI design authoring workflow. " +
    "Use action 'create' to save DESIGN.md and preview.html into ~/.config/revela/designs/{name}/. " +
    "Use action 'validate' to check a generated design package before asking the user to activate it.",
  args: {
    action: tool.schema
      .enum(["create", "validate"])
      .describe("Operation to perform"),
    name: tool.schema
      .string()
      .optional()
      .describe("Design name in kebab-case. Required for create and validate."),
    base: tool.schema
      .string()
      .optional()
      .describe("Base design used as structural scaffold, e.g. 'summit'. Recorded in the result only."),
    designMd: tool.schema
      .string()
      .optional()
      .describe("Complete DESIGN.md content. Required for create."),
    previewHtml: tool.schema
      .string()
      .optional()
      .describe("Complete preview.html content. Required for create."),
    overwrite: tool.schema
      .boolean()
      .optional()
      .describe("Whether to replace an existing local design package. Defaults to false."),
  },
  async execute(args) {
    try {
      if (!args.name) return JSON.stringify({ error: "name is required" })

      switch (args.action) {
        case "create": {
          if (!args.designMd) return JSON.stringify({ error: "designMd is required for create" })
          if (!args.previewHtml) return JSON.stringify({ error: "previewHtml is required for create" })
          const result = createDesignPackage({
            name: args.name,
            base: args.base,
            designMd: args.designMd,
            previewHtml: args.previewHtml,
            overwrite: args.overwrite ?? false,
          })
          return JSON.stringify(result, null, 2)
        }
        case "validate": {
          return JSON.stringify(validateDesignPackage(args.name), null, 2)
        }
        default: {
          return JSON.stringify({ error: `Unknown action: ${args.action}` })
        }
      }
    } catch (e: any) {
      return JSON.stringify({ error: e.message || String(e) })
    }
  },
})