import * as git from "simple-git/promise";
import * as path from "path";

export default class Git {
	git: any;

	constructor(gitPath?: string) {
		this.git = git(gitPath);
	}

	status() {
		return this.git.status();
	}

	pull(remote: string, branch: string, options?: any) {
		return this.git.pull(remote, branch, options);
	}

	async push(branch?: string, remote: string = "origin") {
		if (!branch) {
			branch = await this.getCurrentBranch();
		}
		return this.git.push(remote, branch);
	}

	add(p: string) {
		return this.git.add(p);
	}

	commit(msg: string) {
		return this.git.commit(msg);
	}

	getLatestCommit(): Promise<string> {
		return this.git.log(["-1"]).then(log => log.latest.hash);
	}

	async getFilesByCommitRange(from: string, to: string): Promise<string[]> {
		const commits = await this.git
			.log({
				from,
				to
			})
			.then(log => log.all.map(item => item.hash));

		return this.getFilesByCommits(commits);
	}

	getFilesByCommits(commits: string[]): Promise<string[]> {
		return this.git.show(["--name-only", "--pretty=", ...commits]).then((result: string) =>
			result
				.split("\n")
				.filter(item => !!item)
				.map(file => path.resolve(process.cwd(), file))
		);
	}

	async getCurrentBranch() {
		const stats = await this.git.status();
		return stats.current;
	}
}