import type { ReportLanguage } from "./language.ts";
import type { Finding, ReviewResult } from "./types.ts";

function findingText(
	finding: Finding,
	index: number,
	language: ReportLanguage,
): string {
	const location =
		finding.kind === "code"
			? `\`${finding.path}:${finding.line}\``
			: finding.path
				? language === "zh-CN"
					? `\`${finding.path}\` 附近的任务要求`
					: `task requirement near \`${finding.path}\``
				: language === "zh-CN"
					? "任务要求"
					: "task requirement";
	const evidence = language === "zh-CN" ? "证据" : "Evidence";
	return `${index + 1}. **${finding.title}** (${location})\n\n   ${finding.description}\n\n   ${evidence}: ${finding.evidence}`;
}

export function renderReport(
	result: ReviewResult,
	language: ReportLanguage = "en",
): string {
	if (language === "zh-CN") {
		if (result.status === "skipped")
			return `## 已跳过代码审查\n\n${result.reason ?? "无需进行审查。"}\n\n**合并结论：未评估。**`;
		if (result.status === "aborted")
			return "## 代码审查已取消\n\n**合并结论：无法判断。**";
		if (result.status === "incomplete") {
			return `## 代码审查未完成\n\n${result.reason ?? "必要的审查阶段失败。"}\n\n${result.failures.map((failure) => `- ${failure}`).join("\n")}\n\n**合并结论：无法判断。**`;
		}
		if (result.findings.length === 0) {
			return "## 代码审查\n\n未发现问题。已检查任务完成度、变更范围、缺陷、回归、权限与安全风险、维护风险，以及 AGENTS.md 合规性。\n\n**合并结论：从本次代码审查结果看，建议合并。**";
		}
		return `## 代码审查\n\n发现 ${result.findings.length} 个高置信问题：\n\n${result.findings.map((finding, index) => findingText(finding, index, language)).join("\n\n")}\n\n**合并结论：不建议当前合并，请先解决上述高置信问题。**`;
	}
	if (result.status === "skipped")
		return `## Code review skipped\n\n${result.reason ?? "Review was not required."}\n\n**Merge recommendation: Not evaluated.**`;
	if (result.status === "aborted")
		return "## Code review aborted\n\n**Merge recommendation: Unable to determine.**";
	if (result.status === "incomplete") {
		return `## Code review incomplete\n\n${result.reason ?? "A required review stage failed."}\n\n${result.failures.map((failure) => `- ${failure}`).join("\n")}\n\n**Merge recommendation: Unable to determine.**`;
	}
	if (result.findings.length === 0) {
		return "## Code review\n\nNo issues found. Checked task completion, scope, bugs, regressions, permission and security risks, maintenance risks, and AGENTS.md compliance.\n\n**Merge recommendation: Merge based on this code review.**";
	}
	return `## Code review\n\nFound ${result.findings.length} high-confidence issue${result.findings.length === 1 ? "" : "s"}:\n\n${result.findings.map((finding, index) => findingText(finding, index, language)).join("\n\n")}\n\n**Merge recommendation: Do not merge until the high-confidence issues above are resolved.**`;
}