use assert_cmd::Command;
use tempfile::NamedTempFile;

#[test]
fn render_md_reads_json_and_outputs_markdown_to_stdout() {
    let input = NamedTempFile::new().unwrap();
    std::fs::write(
        input.path(),
        r#"{
  "meta": {
    "repo": "org/repo",
    "pr_index": 1,
    "title": "t",
    "state": "open",
    "author": "a",
    "base_branch": "main",
    "head_branch": "f",
    "created_at": "2026-04-08T10:00:00Z",
    "updated_at": "2026-04-08T11:00:00Z",
    "merged_at": null
  },
  "commits": [],
  "diff_stat": {
    "files_changed": 0,
    "additions": 0,
    "deletions": 0,
    "files": []
  },
  "reviews": [],
  "threads": []
}"#,
    )
    .unwrap();

    let mut cmd = Command::cargo_bin("gitea-pr-review").unwrap();
    let assert = cmd
        .args(["render-md", "--in", input.path().to_str().unwrap()])
        .assert()
        .success();

    let stdout = String::from_utf8(assert.get_output().stdout.clone()).unwrap();
    assert!(stdout.contains("# org/repo `#1` t"));
    assert!(stdout.contains("## Metadata"));
}

#[test]
fn render_md_writes_to_out_file_when_requested() {
    let input = NamedTempFile::new().unwrap();
    std::fs::write(
        input.path(),
        r#"{
  "meta": {
    "repo": "org/repo",
    "pr_index": 2,
    "title": "t2",
    "state": "open",
    "author": "a",
    "base_branch": "main",
    "head_branch": "f",
    "created_at": "2026-04-08T10:00:00Z",
    "updated_at": "2026-04-08T11:00:00Z",
    "merged_at": null
  },
  "commits": [],
  "diff_stat": {
    "files_changed": 0,
    "additions": 0,
    "deletions": 0,
    "files": []
  },
  "reviews": [],
  "threads": []
}"#,
    )
    .unwrap();

    let output = NamedTempFile::new().unwrap();

    Command::cargo_bin("gitea-pr-review")
        .unwrap()
        .args([
            "render-md",
            "--in",
            input.path().to_str().unwrap(),
            "--out",
            output.path().to_str().unwrap(),
        ])
        .assert()
        .success();

    let written = std::fs::read_to_string(output.path()).unwrap();
    assert!(written.contains("# org/repo `#2` t2"));
    assert!(written.contains("## Metadata"));
}