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

import { describe, it, expect, beforeEach, afterEach } from "bun:test"
import { join } from "node:path"
import { tmpdir } from "node:os"
import { resolveSkillContent, resolveMultipleSkills, resolveSkillContentAsync, resolveMultipleSkillsAsync } from "./skill-content"

let originalEnv: Record<string, string | undefined>
let testConfigDir: string

beforeEach(() => {
	originalEnv = {
		CLAUDE_CONFIG_DIR: process.env.CLAUDE_CONFIG_DIR,
		OPENCODE_CONFIG_DIR: process.env.OPENCODE_CONFIG_DIR,
	}
	const unique = `skill-content-test-${Date.now()}-${Math.random().toString(16).slice(2)}`
	testConfigDir = join(tmpdir(), unique)
	process.env.CLAUDE_CONFIG_DIR = testConfigDir
	process.env.OPENCODE_CONFIG_DIR = testConfigDir
})

afterEach(() => {
	for (const [key, value] of Object.entries(originalEnv)) {
		if (value !== undefined) {
			process.env[key] = value
		} else {
			delete process.env[key]
		}
	}
})

describe("resolveSkillContent", () => {
	it("should return template for existing skill", () => {
		// given: builtin skills with 'frontend-ui-ux' skill
		// when: resolving content for 'frontend-ui-ux'
		const result = resolveSkillContent("frontend-ui-ux")

		// then: returns template string
		expect(result).not.toBeNull()
		expect(typeof result).toBe("string")
		expect(result).toContain("Role: Designer-Turned-Developer")
	})

	it("should return template for 'playwright' skill", () => {
		// given: builtin skills with 'playwright' skill
		// when: resolving content for 'playwright'
		const result = resolveSkillContent("playwright")

		// then: returns template string
		expect(result).not.toBeNull()
		expect(typeof result).toBe("string")
		expect(result).toContain("Playwright Browser Automation")
	})

	it("should return null for non-existent skill", () => {
		// given: builtin skills without 'nonexistent' skill
		// when: resolving content for 'nonexistent'
		const result = resolveSkillContent("nonexistent")

		// then: returns null
		expect(result).toBeNull()
	})

	it("should return null for disabled skill", () => {
		// given: frontend-ui-ux skill disabled
		const options = { disabledSkills: new Set(["frontend-ui-ux"]) }

		// when: resolving content for disabled skill
		const result = resolveSkillContent("frontend-ui-ux", options)

		// then: returns null
		expect(result).toBeNull()
	})
})

describe("resolveMultipleSkills", () => {
	it("should resolve all existing skills", () => {
		// given: list of existing skill names
		const skillNames = ["frontend-ui-ux", "playwright"]

		// when: resolving multiple skills
		const result = resolveMultipleSkills(skillNames)

		// then: all skills resolved, none not found
		expect(result.resolved.size).toBe(2)
		expect(result.notFound).toEqual([])
		expect(result.resolved.get("frontend-ui-ux")).toContain("Designer-Turned-Developer")
		expect(result.resolved.get("playwright")).toContain("Playwright Browser Automation")
	})

	it("should handle partial success - some skills not found", () => {
		// given: list with existing and non-existing skills
		const skillNames = ["frontend-ui-ux", "nonexistent", "playwright", "another-missing"]

		// when: resolving multiple skills
		const result = resolveMultipleSkills(skillNames)

		// then: resolves existing skills, lists not found skills
		expect(result.resolved.size).toBe(2)
		expect(result.notFound).toEqual(["nonexistent", "another-missing"])
		expect(result.resolved.get("frontend-ui-ux")).toContain("Designer-Turned-Developer")
		expect(result.resolved.get("playwright")).toContain("Playwright Browser Automation")
	})

	it("should handle empty array", () => {
		// given: empty skill names list
		const skillNames: string[] = []

		// when: resolving multiple skills
		const result = resolveMultipleSkills(skillNames)

		// then: returns empty resolved and notFound
		expect(result.resolved.size).toBe(0)
		expect(result.notFound).toEqual([])
	})

	it("should handle all skills not found", () => {
		// given: list of non-existing skills
		const skillNames = ["skill-one", "skill-two", "skill-three"]

		// when: resolving multiple skills
		const result = resolveMultipleSkills(skillNames)

		// then: no skills resolved, all in notFound
		expect(result.resolved.size).toBe(0)
		expect(result.notFound).toEqual(["skill-one", "skill-two", "skill-three"])
	})

	it("should treat disabled skills as not found", () => {
		// #given: frontend-ui-ux disabled, playwright not disabled
		const skillNames = ["frontend-ui-ux", "playwright"]
		const options = { disabledSkills: new Set(["frontend-ui-ux"]) }

		// #when: resolving multiple skills with disabled one
		const result = resolveMultipleSkills(skillNames, options)

		// #then: frontend-ui-ux in notFound, playwright resolved
		expect(result.resolved.size).toBe(1)
		expect(result.resolved.has("playwright")).toBe(true)
		expect(result.notFound).toEqual(["frontend-ui-ux"])
	})

	it("should preserve skill order in resolved map", () => {
		// given: list of skill names in specific order
		const skillNames = ["playwright", "frontend-ui-ux"]

		// when: resolving multiple skills
		const result = resolveMultipleSkills(skillNames)

		// then: map contains skills with expected keys
		expect(result.resolved.has("playwright")).toBe(true)
		expect(result.resolved.has("frontend-ui-ux")).toBe(true)
		expect(result.resolved.size).toBe(2)
	})
})

describe("resolveSkillContentAsync", () => {
	it("should return template for builtin skill async", async () => {
		// given: builtin skill 'frontend-ui-ux'
		// when: resolving content async
		const options = { disabledSkills: new Set(["frontend-ui-ux"]) }
		const result = await resolveSkillContentAsync("git-master", options)

		// then: returns template string
		expect(result).not.toBeNull()
		expect(typeof result).toBe("string")
		expect(result).toContain("Git Master Agent")
	})

	it("should return null for disabled skill async", async () => {
		// given: frontend-ui-ux disabled
		const options = { disabledSkills: new Set(["frontend-ui-ux"]) }

		// when: resolving content async for disabled skill
		const result = await resolveSkillContentAsync("frontend-ui-ux", options)

		// then: returns null
		expect(result).toBeNull()
	})
})

describe("resolveMultipleSkillsAsync", () => {
	it("should resolve builtin skills async", async () => {
		// given: builtin skill names
		const skillNames = ["playwright", "git-master"]

		// when: resolving multiple skills async
		const result = await resolveMultipleSkillsAsync(skillNames)

		// then: all builtin skills resolved
		expect(result.resolved.size).toBe(2)
		expect(result.notFound).toEqual([])
		expect(result.resolved.get("playwright")).toContain("Playwright Browser Automation")
		expect(result.resolved.get("git-master")).toContain("Git Master Agent")
	})

	it("should handle partial success with non-existent skills async", async () => {
		// given: mix of existing and non-existing skills
		const skillNames = ["playwright", "nonexistent-skill-12345"]

		// when: resolving multiple skills async
		const result = await resolveMultipleSkillsAsync(skillNames)

		// then: existing skills resolved, non-existing in notFound
		expect(result.resolved.size).toBe(1)
		expect(result.notFound).toEqual(["nonexistent-skill-12345"])
		expect(result.resolved.get("playwright")).toContain("Playwright Browser Automation")
	})

	it("should treat disabled skills as not found async", async () => {
		// #given: frontend-ui-ux disabled
		const skillNames = ["frontend-ui-ux", "playwright"]
		const options = { disabledSkills: new Set(["frontend-ui-ux"]) }

		// #when: resolving multiple skills async with disabled one
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// #then: frontend-ui-ux in notFound, playwright resolved
		expect(result.resolved.size).toBe(1)
		expect(result.resolved.has("playwright")).toBe(true)
		expect(result.notFound).toEqual(["frontend-ui-ux"])
	})

	it("should NOT inject watermark when both options are disabled", async () => {
		// given: git-master skill with watermark disabled
		const skillNames = ["git-master"]
		const options = {
			gitMasterConfig: {
				commit_footer: false,
				include_co_authored_by: false,
			},
		}

		// when: resolving with git-master config
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// then: no watermark section injected
		expect(result.resolved.size).toBe(1)
		expect(result.notFound).toEqual([])
		const gitMasterContent = result.resolved.get("git-master")
		expect(gitMasterContent).not.toContain("Ultraworked with")
		expect(gitMasterContent).not.toContain("Co-authored-by: Sisyphus")
	})

	it("should inject watermark when enabled (default)", async () => {
		// given: git-master skill with default config (watermark enabled)
		const skillNames = ["git-master"]
		const options = {
			gitMasterConfig: {
				commit_footer: true,
				include_co_authored_by: true,
			},
		}

		// when: resolving with git-master config
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// then: watermark section is injected
		expect(result.resolved.size).toBe(1)
		const gitMasterContent = result.resolved.get("git-master")
		expect(gitMasterContent).toContain("Ultraworked with [Sisyphus]")
		expect(gitMasterContent).toContain("Co-authored-by: Sisyphus")
	})

	it("should inject only footer when co-author is disabled", async () => {
		// given: git-master skill with only footer enabled
		const skillNames = ["git-master"]
		const options = {
			gitMasterConfig: {
				commit_footer: true,
				include_co_authored_by: false,
			},
		}

		// when: resolving with git-master config
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// then: only footer is injected
		const gitMasterContent = result.resolved.get("git-master")
		expect(gitMasterContent).toContain("Ultraworked with [Sisyphus]")
		expect(gitMasterContent).not.toContain("Co-authored-by: Sisyphus")
	})

	it("should inject watermark by default when no config provided", async () => {
		// given: git-master skill with NO config (default behavior)
		const skillNames = ["git-master"]

		// when: resolving without any gitMasterConfig
		const result = await resolveMultipleSkillsAsync(skillNames)

		// then: watermark is injected (default is ON)
		expect(result.resolved.size).toBe(1)
		const gitMasterContent = result.resolved.get("git-master")
		expect(gitMasterContent).toContain("Ultraworked with [Sisyphus]")
		expect(gitMasterContent).toContain("Co-authored-by: Sisyphus")
	})

	it("should inject only co-author when footer is disabled", async () => {
		// given: git-master skill with only co-author enabled
		const skillNames = ["git-master"]
		const options = {
			gitMasterConfig: {
				commit_footer: false,
				include_co_authored_by: true,
			},
		}

		// when: resolving with git-master config
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// then: only co-author is injected
		const gitMasterContent = result.resolved.get("git-master")
		expect(gitMasterContent).not.toContain("Ultraworked with [Sisyphus]")
		expect(gitMasterContent).toContain("Co-authored-by: Sisyphus")
	})

	it("should inject custom string footer when commit_footer is a string", async () => {
		// given: git-master skill with custom string footer
		const skillNames = ["git-master"]
		const customFooter = "Custom footer from my team"
		const options = {
			gitMasterConfig: {
				commit_footer: customFooter,
				include_co_authored_by: false,
			},
		}

		// when: resolving with custom footer config
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// then: custom footer is injected instead of default
		const gitMasterContent = result.resolved.get("git-master")
		expect(gitMasterContent).toContain(customFooter)
		expect(gitMasterContent).not.toContain("Ultraworked with [Sisyphus]")
	})

	it("should use default Sisyphus footer when commit_footer is boolean true", async () => {
		// given: git-master skill with boolean true footer
		const skillNames = ["git-master"]
		const options = {
			gitMasterConfig: {
				commit_footer: true,
				include_co_authored_by: false,
			},
		}

		// when: resolving with boolean true footer config
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// then: default Sisyphus footer is injected
		const gitMasterContent = result.resolved.get("git-master")
		expect(gitMasterContent).toContain("Ultraworked with [Sisyphus]")
	})

	it("should handle empty array", async () => {
		// given: empty skill names
		const skillNames: string[] = []

		// when: resolving multiple skills async
		const result = await resolveMultipleSkillsAsync(skillNames)

		// then: empty results
		expect(result.resolved.size).toBe(0)
		expect(result.notFound).toEqual([])
	})
})

describe("resolveSkillContent with browserProvider", () => {
	it("should resolve agent-browser skill when browserProvider is 'agent-browser'", () => {
		// given: browserProvider set to agent-browser
		const options = { browserProvider: "agent-browser" as const }

		// when: resolving content for 'agent-browser'
		const result = resolveSkillContent("agent-browser", options)

		// then: returns agent-browser template
		expect(result).not.toBeNull()
		expect(result).toContain("agent-browser")
	})

	it("should return null for agent-browser when browserProvider is default", () => {
		// given: no browserProvider (defaults to playwright)

		// when: resolving content for 'agent-browser'
		const result = resolveSkillContent("agent-browser")

		// then: returns null because agent-browser is not in default builtin skills
		expect(result).toBeNull()
	})

	it("should return null for playwright when browserProvider is agent-browser", () => {
		// given: browserProvider set to agent-browser
		const options = { browserProvider: "agent-browser" as const }

		// when: resolving content for 'playwright'
		const result = resolveSkillContent("playwright", options)

		// then: returns null because playwright is replaced by agent-browser
		expect(result).toBeNull()
	})
})

describe("resolveMultipleSkills with browserProvider", () => {
	it("should resolve agent-browser when browserProvider is set", () => {
		// given: agent-browser and git-master requested with browserProvider
		const skillNames = ["agent-browser", "git-master"]
		const options = { browserProvider: "agent-browser" as const }

		// when: resolving multiple skills
		const result = resolveMultipleSkills(skillNames, options)

		// then: both resolved
		expect(result.resolved.has("agent-browser")).toBe(true)
		expect(result.resolved.has("git-master")).toBe(true)
		expect(result.notFound).toHaveLength(0)
	})

	it("should not resolve agent-browser without browserProvider option", () => {
		// given: agent-browser requested without browserProvider
		const skillNames = ["agent-browser"]

		// when: resolving multiple skills
		const result = resolveMultipleSkills(skillNames)

		// then: agent-browser not found
		expect(result.resolved.has("agent-browser")).toBe(false)
		expect(result.notFound).toContain("agent-browser")
	})
})

describe("resolveMultipleSkillsAsync with browserProvider filtering", () => {
	it("should exclude discovered agent-browser when browserProvider is playwright", async () => {
		// given: playwright is the selected browserProvider (default)
		const skillNames = ["playwright", "git-master"]
		const options = { browserProvider: "playwright" as const }

		// when: resolving multiple skills
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// then: playwright resolved, agent-browser would be excluded if discovered
		expect(result.resolved.has("playwright")).toBe(true)
		expect(result.resolved.has("git-master")).toBe(true)
		expect(result.notFound).not.toContain("playwright")
	})

	it("should exclude discovered playwright when browserProvider is agent-browser", async () => {
		// given: agent-browser is the selected browserProvider
		const skillNames = ["agent-browser", "git-master"]
		const options = { browserProvider: "agent-browser" as const }

		// when: resolving multiple skills
		const result = await resolveMultipleSkillsAsync(skillNames, options)

		// then: agent-browser resolved, playwright would be excluded if discovered
		expect(result.resolved.has("agent-browser")).toBe(true)
		expect(result.resolved.has("git-master")).toBe(true)
		expect(result.notFound).not.toContain("agent-browser")
	})
})