/// <reference types="bun-types" />

import { describe, it, expect } from "bun:test"
import {
  buildCategorySkillsDelegationGuide,
  buildUltraworkSection,
  buildParallelDelegationSection,
  buildNonClaudePlannerSection,
  type AvailableSkill,
  type AvailableCategory,
  type AvailableAgent,
} from "./dynamic-agent-prompt-builder"

describe("buildCategorySkillsDelegationGuide", () => {
  const categories: AvailableCategory[] = [
    { name: "visual-engineering", description: "Frontend, UI/UX" },
    { name: "quick", description: "Trivial tasks" },
  ]

  const builtinSkills: AvailableSkill[] = [
    { name: "playwright", description: "Browser automation via Playwright", location: "plugin" },
    { name: "frontend-ui-ux", description: "Designer-turned-developer", location: "plugin" },
  ]

  const customUserSkills: AvailableSkill[] = [
    { name: "react-19", description: "React 19 patterns and best practices", location: "user" },
    { name: "tailwind-4", description: "Tailwind CSS v4 utilities", location: "user" },
  ]

  const customProjectSkills: AvailableSkill[] = [
    { name: "our-design-system", description: "Internal design system components", location: "project" },
  ]

  it("should list builtin and custom skills in compact format", () => {
    //#given: mix of builtin and custom skills
    const allSkills = [...builtinSkills, ...customUserSkills]

    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide(categories, allSkills)

    //#then: should use compact format with both sections
    expect(result).toContain("**Built-in**: playwright, frontend-ui-ux")
    expect(result).toContain("YOUR SKILLS (PRIORITY)")
    expect(result).toContain("react-19 (user)")
    expect(result).toContain("tailwind-4 (user)")
  })

  it("should point to skill tool as source of truth", () => {
    //#given: skills present
    const allSkills = [...builtinSkills, ...customUserSkills]

    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide(categories, allSkills)

    //#then: should reference the skill tool for full descriptions
    expect(result).toContain("`skill` tool")
  })

  it("should show source tags for custom skills (user vs project)", () => {
    //#given: both user and project custom skills
    const allSkills = [...builtinSkills, ...customUserSkills, ...customProjectSkills]

    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide(categories, allSkills)

    //#then: should show source tag for each custom skill
    expect(result).toContain("(user)")
    expect(result).toContain("(project)")
  })

  it("should not show custom skill section when only builtin skills exist", () => {
    //#given: only builtin skills
    const allSkills = [...builtinSkills]

    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide(categories, allSkills)

    //#then: should not contain custom skill emphasis
    expect(result).not.toContain("YOUR SKILLS")
    expect(result).toContain("**Built-in**:")
    expect(result).toContain("Available Skills")
  })

  it("should handle only custom skills (no builtins)", () => {
    //#given: only custom skills, no builtins
    const allSkills = [...customUserSkills]

    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide(categories, allSkills)

    //#then: should show custom skills with emphasis, no builtin line
    expect(result).toContain("YOUR SKILLS (PRIORITY)")
    expect(result).not.toContain("**Built-in**:")
  })

  it("should include priority note for custom skills in evaluation step", () => {
    //#given: custom skills present
    const allSkills = [...builtinSkills, ...customUserSkills]

    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide(categories, allSkills)

    //#then: evaluation section should mention user-installed priority
    expect(result).toContain("User-installed skills get PRIORITY")
    expect(result).toContain("INCLUDE rather than omit")
  })

  it("should NOT include priority note when no custom skills", () => {
    //#given: only builtin skills
    const allSkills = [...builtinSkills]

    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide(categories, allSkills)

    //#then: no priority note for custom skills
    expect(result).not.toContain("User-installed skills get PRIORITY")
  })

  it("should return empty string when no categories and no skills", () => {
    //#given: no categories and no skills
    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide([], [])

    //#then: should return empty string
    expect(result).toBe("")
  })

  it("should include category descriptions", () => {
    //#given: categories with descriptions
    const allSkills = [...builtinSkills]

    //#when: building the delegation guide
    const result = buildCategorySkillsDelegationGuide(categories, allSkills)

    //#then: should list categories with their descriptions
    expect(result).toContain("`visual-engineering`")
    expect(result).toContain("Frontend, UI/UX")
    expect(result).toContain("`quick`")
    expect(result).toContain("Trivial tasks")
  })
})

describe("buildUltraworkSection", () => {
  const agents: AvailableAgent[] = []

  it("should separate builtin and custom skills", () => {
    //#given: mix of builtin and custom skills
    const skills: AvailableSkill[] = [
      { name: "playwright", description: "Browser automation", location: "plugin" },
      { name: "react-19", description: "React 19 patterns", location: "user" },
    ]

    //#when: building ultrawork section
    const result = buildUltraworkSection(agents, [], skills)

    //#then: should have separate sections
    expect(result).toContain("Built-in Skills")
    expect(result).toContain("User-Installed Skills")
    expect(result).toContain("HIGH PRIORITY")
  })

  it("should not separate when only builtin skills", () => {
    //#given: only builtin skills
    const skills: AvailableSkill[] = [
      { name: "playwright", description: "Browser automation", location: "plugin" },
    ]

    //#when: building ultrawork section
    const result = buildUltraworkSection(agents, [], skills)

    //#then: should have single section
    expect(result).toContain("Built-in Skills")
    expect(result).not.toContain("User-Installed Skills")
  })
})

describe("buildParallelDelegationSection", () => {
  const deepCategory: AvailableCategory = { name: "deep", description: "Autonomous problem-solving" }
  const unspecifiedHighCategory: AvailableCategory = { name: "unspecified-high", description: "High effort tasks" }
  const otherCategory: AvailableCategory = { name: "quick", description: "Trivial tasks" }

  it("#given non-Claude model with deep category #when building #then returns aggressive delegation section", () => {
    //#given
    const model = "google/gemini-3.1-pro"
    const categories = [deepCategory, otherCategory]

    //#when
    const result = buildParallelDelegationSection(model, categories)

    //#then
    expect(result).toContain("DECOMPOSE AND DELEGATE")
    expect(result).toContain("NOT AN IMPLEMENTER")
    expect(result).toContain("run_in_background=true")
    expect(result).toContain("4 independent units")
    expect(result).toContain("NEVER implement directly")
  })

  it("#given non-Claude model with unspecified-high category #when building #then returns aggressive delegation section", () => {
    //#given
    const model = "openai/gpt-5.4"
    const categories = [unspecifiedHighCategory, otherCategory]

    //#when
    const result = buildParallelDelegationSection(model, categories)

    //#then
    expect(result).toContain("DECOMPOSE AND DELEGATE")
    expect(result).toContain("`deep` or `unspecified-high`")
    expect(result).toContain("NEVER work sequentially")
  })

  it("#given Claude model #when building #then returns empty", () => {
    //#given
    const model = "anthropic/claude-opus-4-7"
    const categories = [deepCategory]

    //#when
    const result = buildParallelDelegationSection(model, categories)

    //#then
    expect(result).toBe("")
  })

  it("#given non-Claude model without deep or unspecified-high category #when building #then returns empty", () => {
    //#given
    const model = "openai/gpt-5.4"
    const categories = [otherCategory]

    //#when
    const result = buildParallelDelegationSection(model, categories)

    //#then
    expect(result).toBe("")
  })
})

describe("buildNonClaudePlannerSection", () => {
  it("#given non-Claude model #when building #then returns plan agent section", () => {
    //#given
    const model = "google/gemini-3.1-pro"

    //#when
    const result = buildNonClaudePlannerSection(model)

    //#then
    expect(result).toContain("Plan Agent")
    expect(result).toContain("task_id")
    expect(result).toContain("Multi-step")
  })

  it("#given Claude model #when building #then returns empty", () => {
    //#given
    const model = "anthropic/claude-sonnet-4-6"

    //#when
    const result = buildNonClaudePlannerSection(model)

    //#then
    expect(result).toBe("")
  })

  it("#given GPT model #when building #then returns plan agent section", () => {
    //#given
    const model = "openai/gpt-5.4"

    //#when
    const result = buildNonClaudePlannerSection(model)

    //#then
    expect(result).toContain("Plan Agent")
    expect(result).not.toBe("")
  })
})