//! Headless runs lay text out with the installed fonts, like the desktop app, unless
//! `--no-system-fonts` or `FIGCRAFT_NO_SYSTEM_FONTS=1` opts out.

use std::process::Command;

use serde_json::{Value, json};

/// The result of one `figcraft-cli run` step (script file `name`); `opt_out` sets the environment
/// variable.
fn run_one(name: &str, step: Value, args: &[&str], opt_out: bool) -> Value {
    let d = std::env::temp_dir().join(format!("figcraft-cli-fonts-{}", std::process::id()));
    std::fs::create_dir_all(&d).unwrap();
    let script = d.join(format!("{name}.json"));
    std::fs::write(&script, json!([step]).to_string()).unwrap();
    let mut cmd = Command::new(env!("CARGO_BIN_EXE_figcraft-cli"));
    cmd.arg("run").arg(&script).args(args);
    if opt_out {
        cmd.env("FIGCRAFT_NO_SYSTEM_FONTS", "1");
    } else {
        cmd.env_remove("FIGCRAFT_NO_SYSTEM_FONTS");
    }
    let out = cmd.output().unwrap();
    assert!(out.status.success(), "{}", String::from_utf8_lossy(&out.stderr));
    let line: Value = serde_json::from_slice(&out.stdout).unwrap();
    line["result"].clone()
}

fn families(args: &[&str], opt_out: bool) -> Vec<String> {
    serde_json::from_value(run_one("families", json!({"command": "text.fonts"}), args, opt_out)).unwrap()
}

#[test]
fn headless_runs_resolve_installed_families_unless_opted_out() {
    let built_in = families(&["--no-system-fonts"], false);
    assert_eq!(families(&[], true), built_in, "FIGCRAFT_NO_SYSTEM_FONTS=1 opts out like the flag");
    // Any family this machine adds (scanned here, in the test); none (CI): nothing to check.
    figcraft_text::scan_system_fonts();
    let Some(installed) = figcraft_text::family_names().into_iter().find(|f| !built_in.contains(f)) else {
        eprintln!("skipped: no installed fonts beyond the built-in ones");
        return;
    };
    assert!(families(&[], false).contains(&installed), "headless runs list {installed}");
    let face = json!({"command": "text.fonts", "params": {"family": installed, "axes": true}});
    assert_eq!(run_one("face", face.clone(), &[], false)["family"], json!(installed), "text uses the installed family");
    assert_ne!(run_one("face", face, &["--no-system-fonts"], false)["family"], json!(installed), "opted out, it falls back");
}

#[test]
fn info_lists_the_fonts_a_file_uses_that_are_missing() {
    let d = std::env::temp_dir().join(format!("figcraft-cli-missing-{}", std::process::id()));
    std::fs::create_dir_all(&d).unwrap();
    let (script, file) = (d.join("make.json"), d.join("doc.figcraft"));
    let text =
        |family: &str| json!({"command": "text.create", "params": {"text": "Hamburgefonstiv", "x": 0, "y": 0, "props": {"fontFamily": family}}});
    std::fs::write(&script, json!([text("FigCraft Missing CLI"), text("FigCraft Missing CLI")]).to_string()).unwrap();
    let cli = || Command::new(env!("CARGO_BIN_EXE_figcraft-cli"));
    let made = cli().arg("run").arg(&script).arg("--out").arg(&file).output().unwrap();
    assert!(made.status.success(), "{}", String::from_utf8_lossy(&made.stderr));

    let out = cli().arg("info").arg(&file).arg("--json").output().unwrap();
    assert!(out.status.success(), "{}", String::from_utf8_lossy(&out.stderr));
    let v: Value = serde_json::from_slice(&out.stdout).unwrap();
    assert_eq!(v["missingFonts"], json!([{"family": "FigCraft Missing CLI", "layers": 2}]));

    let out = cli().arg("info").arg(&file).output().unwrap();
    let shown = String::from_utf8_lossy(&out.stdout);
    assert!(shown.contains("missing font \"FigCraft Missing CLI\": 2 text layers"), "{shown}");
}

/// A synthetic `.sketch` file: one page with one Helvetica text.
const SKETCH: &str = "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";

/// Opening a `.sketch` file (whose import matches fonts against the installed ones) keeps to
/// `--no-system-fonts` too: the run still knows only the built-in families.
#[test]
fn sketch_imports_keep_to_no_system_fonts() {
    let d = std::env::temp_dir().join(format!("figcraft-cli-fonts-sketch-{}", std::process::id()));
    std::fs::create_dir_all(&d).unwrap();
    let script = d.join("open.json");
    let steps = json!([{"command": "file.open", "params": {"data": SKETCH, "name": "x.sketch"}}, {"command": "text.fonts"}]);
    std::fs::write(&script, steps.to_string()).unwrap();
    let out = Command::new(env!("CARGO_BIN_EXE_figcraft-cli"))
        .arg("run")
        .arg(&script)
        .arg("--no-system-fonts")
        .env_remove("FIGCRAFT_NO_SYSTEM_FONTS")
        .output()
        .unwrap();
    assert!(out.status.success(), "{}", String::from_utf8_lossy(&out.stderr));
    let lines: Vec<Value> = String::from_utf8_lossy(&out.stdout).lines().map(|l| serde_json::from_str(l).unwrap()).collect();
    assert_eq!(lines[0]["ok"], json!(true), "{lines:?}");
    let fonts: Vec<String> = serde_json::from_value(lines[1]["result"].clone()).unwrap();
    assert_eq!(fonts, families(&["--no-system-fonts"], false), "the import didn't scan the system fonts");
}