/**
 * 产品画像检查：产品线只由 kcode init 写入；skill 只作为会话能力信号，不自动改写画像。
 */
import {
	type ProductLineGroup,
	type ResolvedProductLinesFromSkills,
	resolveProductLinesFromSkillNames,
} from "./product-line-registry";
import { readProductsFromProjectMd } from "./product-md";

export function isProductProfileUnset(productIds: string[]): boolean {
	return productIds.length === 0;
}

export interface CheckProductsFromSkillsResult {
	reason: string;
	resolved: ResolvedProductLinesFromSkills;
	previous: string[];
	next: string[];
}

/** Read-only product-line consistency check. kcode init --cosmic|--enterprise is the only supported product-line writer. */
export function checkProductsFromSkillNames(cwd: string, skillNames: string[]): CheckProductsFromSkillsResult {
	const resolved = resolveProductLinesFromSkillNames(skillNames);
	const previous = readProductsFromProjectMd(cwd);

	if (resolved.productIds.length === 0) {
		return { reason: "无金蝶产品线 skill", resolved, previous, next: previous };
	}

	if (resolved.conflict) {
		return {
			reason: "多个互斥产品线 skill 同时加载；以 kcode init 写入的产品画像为准",
			resolved,
			previous,
			next: previous,
		};
	}

	if (isProductProfileUnset(previous)) {
		return {
			reason: "产品画像为空；请运行 kcode init --cosmic 或 kcode init --enterprise 写入",
			resolved,
			previous,
			next: previous,
		};
	}

	if (productsConflictWithSkillResolution(previous, resolved)) {
		return {
			reason: "已确认产品画像与当前 skill 跨族；不自动覆盖，请检查初始化是否正确",
			resolved,
			previous,
			next: previous,
		};
	}

	return { reason: "已确认产品画像存在；skill 不改写画像", resolved, previous, next: previous };
}

function productsConflictWithSkillResolution(current: string[], resolved: ResolvedProductLinesFromSkills): boolean {
	if (resolved.groups.length !== 1) return true;

	const group = resolved.groups[0]!;
	const cosmicIds = new Set(["cosmic-java", "cangqiong", "xinghan", "qijian", "cosmic"]);
	const enterpriseIds = new Set(["enterprise-csharp", "enterprise-ironpython", "enterprise", "k3cloud"]);
	const openapiIds = new Set(["enterprise-openapi"]);

	function familyOf(id: string): ProductLineGroup | "unknown" {
		if (cosmicIds.has(id) || id.includes("cosmic") || id.includes("cangqiong")) return "cosmic";
		if (openapiIds.has(id)) return "enterprise-openapi";
		if (enterpriseIds.has(id) || id.includes("enterprise")) return "enterprise";
		return "unknown";
	}

	for (const id of current) {
		const f = familyOf(id);
		if (f === "unknown") continue;
		if (f !== group) return true;
	}
	return false;
}