/**
 * @deprecated LEGACY MIGRATION ONLY
 *
 * This map exists solely for migrating old configs that used hardcoded model strings.
 * It maps legacy model strings to semantic category names, allowing users to migrate
 * from explicit model configs to category-based configs.
 *
 * DO NOT add new entries here. New agents should use:
 * - Category-based config (preferred): { category: "unspecified-high" }
 * - Or inherit from OpenCode's config.model
 *
 * This map will be removed in a future major version once migration period ends.
 */
export const MODEL_TO_CATEGORY_MAP: Record<string, string> = {
  "google/gemini-3-pro": "visual-engineering",
  "google/gemini-3-flash": "writing",
  "openai/gpt-5.2": "ultrabrain",
  "anthropic/claude-haiku-4-5": "quick",
  "anthropic/claude-opus-4-6": "unspecified-high",
  "anthropic/claude-sonnet-4-5": "unspecified-low",
}

export function migrateAgentConfigToCategory(config: Record<string, unknown>): {
  migrated: Record<string, unknown>
  changed: boolean
} {
  const { model, ...rest } = config
  if (typeof model !== "string") {
    return { migrated: config, changed: false }
  }

  const category = MODEL_TO_CATEGORY_MAP[model]
  if (!category) {
    return { migrated: config, changed: false }
  }

  return {
    migrated: { category, ...rest },
    changed: true,
  }
}

export function shouldDeleteAgentConfig(
  config: Record<string, unknown>,
  category: string
): boolean {
  const { DEFAULT_CATEGORIES } = require("../../tools/delegate-task/constants")
  const defaults = DEFAULT_CATEGORIES[category]
  if (!defaults) return false

  const keys = Object.keys(config).filter((k) => k !== "category")
  if (keys.length === 0) return true

  for (const key of keys) {
    if (config[key] !== (defaults as Record<string, unknown>)[key]) {
      return false
    }
  }
  return true
}