use serde::{Deserialize, Serialize};
use std::collections::BTreeMap;

/// One `dosdevices` entry to create inside the Wine prefix before launching.
/// `link` is relative to the prefix (e.g. `dosdevices/w:`).
#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]
pub struct PrefixLink {
    pub link: String,
    pub target: String,
}

/// A DRM licence file the game refuses to start without, and the executable
/// that recreates it. A crashed launch deletes the licence, so this is a
/// per-launch precondition rather than a one-time setup step.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct LicenseCheck {
    /// Absolute, or relative to the Wine prefix.
    pub path: String,
    /// Executable run through the profile's runner to regenerate it.
    pub generator: String,
    #[serde(default = "default_license_timeout")]
    pub timeout_secs: u64,
}

/// Everything needed to start one game, as data.
///
/// This is what keeps the launcher game-independent: FIFA 17's runner, prefix,
/// executable, `w:` drive and licence id live here in the user's config, never
/// in launcher code. An unconfigured profile means "fall back to
/// `game_launch_command`", so upgrading cannot break a working setup.
#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]
pub struct GameProfile {
    /// Program that starts the game (e.g. `umu-run`). Empty = profile unused.
    #[serde(default)]
    pub runner: String,
    /// Argument passed to the runner (e.g. `FIFA17.exe`).
    #[serde(default)]
    pub executable: String,
    /// Working directory the runner is started from.
    #[serde(default)]
    pub game_dir: String,
    /// `WINEPREFIX` for the game. Exported automatically when set.
    #[serde(default)]
    pub wine_prefix: String,
    /// Extra environment for the runner (`GAMEID`, `PROTONPATH`, …).
    #[serde(default)]
    pub env: BTreeMap<String, String>,
    #[serde(default)]
    pub prefix_links: Vec<PrefixLink>,
    #[serde(default)]
    pub license: Option<LicenseCheck>,
}

impl GameProfile {
    /// Whether this profile is filled in enough to launch from.
    pub fn configured(&self) -> bool {
        !self.runner.trim().is_empty()
            && !self.executable.trim().is_empty()
            && !self.game_dir.trim().is_empty()
    }

    /// Reject a half-filled profile rather than launching something surprising.
    pub fn validate(&self) -> Result<(), String> {
        if self.runner.trim().is_empty() {
            return Err("Game profile has no runner (e.g. umu-run).".into());
        }
        if self.executable.trim().is_empty() {
            return Err("Game profile has no executable.".into());
        }
        if self.game_dir.trim().is_empty() {
            return Err("Game profile has no game directory.".into());
        }
        if !self.prefix_links.is_empty() && self.wine_prefix.trim().is_empty() {
            return Err("Game profile defines prefix links but no wine_prefix.".into());
        }
        for l in &self.prefix_links {
            if l.link.trim().is_empty() || l.target.trim().is_empty() {
                return Err("Game profile has a prefix link with an empty link or target.".into());
            }
            if std::path::Path::new(&l.link).is_absolute() {
                return Err(format!(
                    "Prefix link {:?} must be relative to the Wine prefix.",
                    l.link
                ));
            }
        }
        if let Some(lic) = &self.license {
            if lic.path.trim().is_empty() || lic.generator.trim().is_empty() {
                return Err("Game profile licence needs both a path and a generator.".into());
            }
        }
        Ok(())
    }
}

fn default_license_timeout() -> u64 {
    60
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct LauncherConfig {
    pub core_binary: String,
    pub bridge_binary: String,
    pub core_database_url: String,
    pub core_data_dir: String,
    pub core_listen_addr: String,
    pub bridge_listen_addr: String,
    pub bridge_captures_dir: String,
    pub bridge_core_url: String,
    pub bridge_tls_enabled: bool,
    /// Path to the built openfut_hook.dll (Windows DLL for Proton injection).
    pub hook_dll_path: String,
    /// FIFA 23 game folder inside the Proton prefix (where the DLL is deployed).
    pub fifa_game_dir: String,
    /// The OpenFUT server FIFA's EA traffic is redirected to. IPv4 literal or
    /// hostname. Empty means "not configured" — launching is blocked until set.
    /// There is intentionally NO loopback default.
    #[serde(default, alias = "hook_redirect_ip")]
    pub openfut_server_host: String,
    /// OpenFUT destination port for intercepted EA :443 (bridge HTTPS).
    #[serde(default = "default_https_port")]
    pub openfut_https_port: u16,
    /// OpenFUT destination port for intercepted EA :10041 (Blaze redirector).
    #[serde(default = "default_blaze_redirector_port")]
    pub openfut_blaze_redirector_port: u16,
    /// OpenFUT destination port for intercepted EA :42127 (Blaze main).
    #[serde(default = "default_blaze_main_port")]
    pub openfut_blaze_main_port: u16,
    /// Plain HTTP UTAS/control-plane port used to select the active account.
    #[serde(default = "default_account_sync_port")]
    pub openfut_account_sync_port: u16,
    /// EA/Origin persona selected for this local single-player profile.
    #[serde(default)]
    pub fut_persona_id: u64,
    #[serde(default)]
    pub fut_persona_name: String,
    /// EASFC/POW account-bar state (separate from FUT club coins).
    #[serde(default = "default_account_level")]
    pub fut_account_level: u32,
    #[serde(default)]
    pub fut_account_experience: u32,
    #[serde(default = "default_account_experience_max")]
    pub fut_account_experience_max: u32,
    #[serde(default)]
    pub fut_account_funds: u32,
    #[serde(default = "default_account_funds_cap")]
    pub fut_account_funds_cap: u32,
    /// Shell command the launcher runs to start the game. Run via `sh -c`, from
    /// `game_launch_workdir` if set. Empty means "not configured" — the Launch
    /// Game button is disabled until the user provides one. This keeps the
    /// launcher agnostic to Steam vs umu-run vs a custom script.
    #[serde(default)]
    pub game_launch_command: String,
    /// Optional working directory for `game_launch_command`. Empty = inherit.
    #[serde(default)]
    pub game_launch_workdir: String,
    /// Native launch definition. When [`GameProfile::configured`], the launcher
    /// starts the game itself and `game_launch_command` is not used; the command
    /// remains as a fallback so an existing setup keeps working after upgrade.
    #[serde(default)]
    pub game_profile: GameProfile,

    // ── Pre-launch checks (see `preflight`) ─────────────────────────────────
    /// EA's hardcoded redirector IP, probed to confirm the client-side DNAT is
    /// armed. Empty = the check is skipped. A game fact, so it is configuration.
    #[serde(default)]
    pub ea_redirect_probe_ip: String,
    /// Dead EA hostnames that must resolve to `openfut_server_host`.
    #[serde(default)]
    pub ea_hostnames: Vec<String>,

    // ── FIFA 17 local companion services (client-side, run on THIS machine) ──
    // FIFA 17's FUT flow needs two pieces that are inherently local to the game
    // box and cannot move to the server: the LSX Origin emulator (the game dials
    // it on the hardcoded loopback 127.0.0.1:4216) and autopatch (patches
    // FIFA17.exe process memory for ProtoSSL cert-verify). The launcher manages
    // both as child processes. The heavy responders (Blaze/UTAS/roster/POW) run
    // in the server container; these two stay here.
    /// Directory holding the FIFA 17 Python responders (fifa17-recon `tools/`).
    /// Empty means the local-services feature is unconfigured and its controls
    /// stay disabled.
    #[serde(default)]
    pub fifa17_tools_dir: String,
    /// Python interpreter used to run the local companion services.
    #[serde(default = "default_python")]
    pub fifa17_python: String,
}

fn default_python() -> String {
    "python3".to_string()
}

fn default_https_port() -> u16 {
    openfut_common::default_ports::HTTPS
}
fn default_blaze_redirector_port() -> u16 {
    openfut_common::default_ports::BLAZE_REDIRECTOR
}
fn default_blaze_main_port() -> u16 {
    openfut_common::default_ports::BLAZE_MAIN
}
fn default_account_sync_port() -> u16 {
    8099
}
fn default_account_level() -> u32 {
    1
}
fn default_account_experience_max() -> u32 {
    1000
}
fn default_account_funds_cap() -> u32 {
    100_000
}

impl Default for LauncherConfig {
    fn default() -> Self {
        let base = dirs::home_dir()
            .map(|h| h.join("Documents/OpenFUT"))
            .unwrap_or_default();

        Self {
            core_binary: base
                .join("openfut-core/target/release/openfut-core")
                .to_string_lossy()
                .into(),
            bridge_binary: base
                .join("openfut-bridge/target/release/openfut-bridge")
                .to_string_lossy()
                .into(),
            core_database_url: "sqlite://openfut.db".into(),
            core_data_dir: base
                .join("openfut-core/data")
                .to_string_lossy()
                .into(),
            core_listen_addr: "127.0.0.1:8080".into(),
            bridge_listen_addr: "0.0.0.0:8765".into(),
            bridge_captures_dir: base
                .join("openfut-bridge/captures")
                .to_string_lossy()
                .into(),
            bridge_core_url: "http://127.0.0.1:8080".into(),
            bridge_tls_enabled: true,
            hook_dll_path: dirs::home_dir()
                .map(|h| h.join("Documents/openfut-launcher/openfut-hook/target/x86_64-pc-windows-gnu/release/openfut_hook.dll"))
                .unwrap_or_default()
                .to_string_lossy()
                .into(),
            fifa_game_dir: dirs::home_dir()
                .map(|h| h.join(".steam/steam/steamapps/common/FIFA 23"))
                .unwrap_or_default()
                .to_string_lossy()
                .into(),
            // No server configured by default — the user MUST enter one. There
            // is deliberately no loopback/localhost default.
            openfut_server_host: String::new(),
            openfut_https_port: default_https_port(),
            openfut_blaze_redirector_port: default_blaze_redirector_port(),
            openfut_blaze_main_port: default_blaze_main_port(),
            openfut_account_sync_port: default_account_sync_port(),
            fut_persona_id: 0,
            fut_persona_name: String::new(),
            fut_account_level: default_account_level(),
            fut_account_experience: 0,
            fut_account_experience_max: default_account_experience_max(),
            fut_account_funds: 0,
            fut_account_funds_cap: default_account_funds_cap(),
            game_launch_command: String::new(),
            game_launch_workdir: String::new(),
            // Empty by default, exactly like the server host: the launcher must
            // never invent a path to somebody's game install.
            game_profile: GameProfile::default(),
            ea_redirect_probe_ip: String::new(),
            ea_hostnames: Vec::new(),
            fifa17_tools_dir: base
                .join("fifa17-recon/tools")
                .to_string_lossy()
                .into(),
            fifa17_python: default_python(),
        }
    }
}

impl LauncherConfig {
    pub fn config_path() -> std::path::PathBuf {
        dirs::config_dir()
            .unwrap_or_else(|| std::path::PathBuf::from("."))
            .join("openfut-launcher")
            .join("config.json")
    }

    pub fn load() -> Self {
        let path = Self::config_path();
        std::fs::read_to_string(&path)
            .ok()
            .and_then(|s| serde_json::from_str(&s).ok())
            .unwrap_or_default()
    }

    pub fn save(&self) {
        let path = Self::config_path();
        if let Some(parent) = path.parent() {
            let _ = std::fs::create_dir_all(parent);
        }
        if let Ok(json) = serde_json::to_string_pretty(self) {
            let _ = std::fs::write(path, json);
        }
    }

    /// The (host, port) the health monitor should poll, or None when no server
    /// is configured. Uses the bridge HTTPS port — the port the FIFA client
    /// actually connects to — so "reachable" means what the game will see.
    pub fn health_target(&self) -> Option<(String, u16)> {
        let host = self.openfut_server_host.trim();
        if host.is_empty() {
            None
        } else {
            Some((host.to_string(), self.openfut_https_port))
        }
    }

    /// The config the account monitor should poll with, or None when no server
    /// is configured. Returns a clone so the background thread owns its own
    /// snapshot and never races the UI's live config.
    pub fn account_target(&self) -> Option<LauncherConfig> {
        if self.openfut_server_host.trim().is_empty() {
            None
        } else {
            Some(self.clone())
        }
    }

    /// Build the shared [`ServerConfig`] from the launcher's configured server
    /// host + destination ports. This is the single place the launcher turns UI
    /// fields into the canonical config consumed by the hook.
    pub fn server_config(&self) -> openfut_common::ServerConfig {
        openfut_common::ServerConfig {
            host: self.openfut_server_host.trim().to_string(),
            ports: openfut_common::OpenFutPorts {
                https: self.openfut_https_port,
                blaze_redirector: self.openfut_blaze_redirector_port,
                blaze_main: self.openfut_blaze_main_port,
            },
        }
    }

    /// Validate the configured server (syntax only, no DNS). Returns the same
    /// user-facing message the task specifies when nothing is configured.
    pub fn validate_server(&self) -> Result<(), String> {
        if self.openfut_server_host.trim().is_empty() {
            return Err("No OpenFUT server configured. Please enter the hostname \
                        or IP address of your OpenFUT server."
                .to_string());
        }
        self.server_config().validate().map_err(|e| e.to_string())
    }

    /// Validate the client-local FIFA 17 service configuration. Filesystem
    /// existence is checked by the process launcher immediately before spawn;
    /// this ensures required user configuration is never silently invented.
    pub fn validate_local_services(&self) -> Result<(), String> {
        if self.fifa17_tools_dir.trim().is_empty() {
            return Err("No FIFA 17 tools dir configured. Set it in Settings.".into());
        }
        if self.fifa17_python.trim().is_empty() {
            return Err("No Python interpreter configured. Set it in Settings.".into());
        }
        Ok(())
    }

    /// Validate every configuration value required by the one-button FIFA 17
    /// launch path. Runtime state such as hook deployment is checked by the UI.
    pub fn validate_launch_config(&self) -> Result<(), String> {
        self.validate_server()?;
        self.validate_account()?;
        // Either launch route is acceptable, but a half-filled profile is not:
        // silently falling back to the shell command would hide the mistake, so
        // ANY profile that has been touched must be complete.
        if self.game_profile != GameProfile::default() {
            self.game_profile.validate()?;
        } else if self.game_launch_command.trim().is_empty() {
            return Err(
                "No game configured. Fill in the game profile, or set a launch command, \
                 in Settings."
                    .into(),
            );
        }
        self.validate_local_services()
    }

    pub fn validate_account(&self) -> Result<(), String> {
        if self.fut_persona_id == 0 {
            return Err("No account yet. Create one from the Get started tab.".into());
        }
        if self.fut_persona_name.trim().is_empty() {
            return Err("Account has no persona name. Recreate it from Get started.".into());
        }
        if self.fut_account_level == 0 {
            return Err("EA account level must be at least 1.".into());
        }
        if self.fut_account_experience_max == 0
            || self.fut_account_experience > self.fut_account_experience_max
        {
            return Err("EA account XP must not exceed a nonzero XP maximum.".into());
        }
        if self.fut_account_funds > self.fut_account_funds_cap {
            return Err("EA account funds must not exceed the funds cap.".into());
        }
        Ok(())
    }

    /// Whether an account has been claimed from the server (see
    /// [`crate::account_sync::discover`]). Distinct from
    /// [`Self::validate_account`], which also polices the derived EASFC values:
    /// this answers only "does this install know who is playing?".
    pub fn account_configured(&self) -> bool {
        self.fut_persona_id != 0 && !self.fut_persona_name.trim().is_empty()
    }

    /// Whether the launcher should open on the guided first-run flow instead of
    /// the dashboard. Keyed on the two things a new user cannot be expected to
    /// guess: where the server is, and who they are.
    pub fn needs_onboarding(&self) -> bool {
        self.validate_server().is_err() || !self.account_configured()
    }

    /// The exact `openfut.cfg` bytes to write for the hook, or an error if the
    /// server isn't validly configured (never emits a loopback fallback).
    ///
    /// The deployed FIFA 17 hook reads this structured format through the same
    /// shared parser, so changing a destination port never requires recompiling
    /// the DLL. Fixed EA source ports remain protocol signatures in the hook.
    pub fn hook_cfg_contents(&self) -> Result<String, String> {
        self.validate_server()?;
        Ok(self.server_config().to_cfg_string())
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn default_has_no_server_and_blocks_launch() {
        let c = LauncherConfig::default();
        assert!(c.openfut_server_host.is_empty());
        let err = c.validate_server().unwrap_err();
        assert!(err.contains("No OpenFUT server configured"));
        assert!(c.hook_cfg_contents().is_err());
    }

    #[test]
    fn configured_server_roundtrips_into_hook_cfg() {
        let c = LauncherConfig {
            openfut_server_host: "192.168.1.50".into(),
            openfut_https_port: 9443,
            openfut_blaze_redirector_port: 43127,
            openfut_blaze_main_port: 43130,
            ..LauncherConfig::default()
        };
        let cfg = c
            .hook_cfg_contents()
            .expect("valid server should produce cfg");
        let parsed = openfut_common::ServerConfig::parse(&cfg).unwrap();
        assert_eq!(parsed.host, "192.168.1.50");
        assert_eq!(parsed.ports, c.server_config().ports);
    }

    #[test]
    fn changing_server_changes_hook_cfg_no_rebuild() {
        // Models the Server A -> Server B acceptance test at the config layer:
        // only the value changes; the same code path produces the new cfg.
        let mut c = LauncherConfig {
            openfut_server_host: "10.0.0.1".into(),
            ..LauncherConfig::default()
        };
        let a = c.hook_cfg_contents().unwrap();
        c.openfut_server_host = "10.0.0.2".into();
        let b = c.hook_cfg_contents().unwrap();
        assert_ne!(a, b);
        assert_eq!(
            openfut_common::ServerConfig::parse(&b).unwrap().host,
            "10.0.0.2"
        );
    }

    #[test]
    fn health_target_none_until_configured() {
        let mut c = LauncherConfig::default();
        assert!(c.health_target().is_none());
        c.openfut_server_host = "10.10.0.120".into();
        let (host, port) = c.health_target().expect("configured host yields a target");
        assert_eq!(host, "10.10.0.120");
        assert_eq!(port, c.openfut_https_port);
    }

    #[test]
    fn legacy_hook_redirect_ip_field_is_read() {
        // Old configs stored the address under `hook_redirect_ip`; serde alias
        // must map it onto the new field so upgrades keep working.
        let json = r#"{
            "core_binary":"","bridge_binary":"","core_database_url":"",
            "core_data_dir":"","core_listen_addr":"","bridge_listen_addr":"",
            "bridge_captures_dir":"","bridge_core_url":"","bridge_tls_enabled":true,
            "hook_dll_path":"","fifa_game_dir":"","hook_redirect_ip":"192.168.5.5"
        }"#;
        let c: LauncherConfig = serde_json::from_str(json).unwrap();
        assert_eq!(c.openfut_server_host, "192.168.5.5");
    }

    #[test]
    fn local_services_require_tools_dir_and_python() {
        let mut c = LauncherConfig::default();
        c.fifa17_tools_dir.clear();
        assert!(c
            .validate_local_services()
            .unwrap_err()
            .contains("tools dir"));

        c.fifa17_tools_dir = "/tmp/fifa17-tools".into();
        c.fifa17_python.clear();
        assert!(c.validate_local_services().unwrap_err().contains("Python"));
    }

    #[test]
    fn local_services_accept_explicit_configuration() {
        let c = LauncherConfig {
            fifa17_tools_dir: "/tmp/fifa17-tools".into(),
            fifa17_python: "/usr/bin/python3".into(),
            ..LauncherConfig::default()
        };
        assert!(c.validate_local_services().is_ok());
    }

    #[test]
    fn launch_config_requires_server_local_services_and_command() {
        let mut c = LauncherConfig::default();
        assert!(c.validate_launch_config().is_err());

        c.openfut_server_host = "10.10.0.120".into();
        c.fut_persona_id = 12345678;
        c.fut_persona_name = "TEST_USER".into();
        assert!(c
            .validate_launch_config()
            .unwrap_err()
            .contains("launch command"));

        c.game_launch_command = "/home/alex/Desktop/launch-fifa17.sh".into();
        c.fifa17_tools_dir.clear();
        assert!(c
            .validate_launch_config()
            .unwrap_err()
            .contains("tools dir"));

        c.fifa17_tools_dir = "/home/alex/Documents/OpenFUT/fifa17-recon/tools".into();
        c.fifa17_python = "/usr/bin/python3".into();
        assert!(c.validate_launch_config().is_ok());
    }

    /// An old config.json has no `game_profile` key at all. It must keep
    /// launching exactly as before rather than failing to parse or silently
    /// switching route.
    #[test]
    fn a_config_without_a_game_profile_still_uses_the_shell_command() {
        let json = r#"{
            "core_binary":"","bridge_binary":"","core_database_url":"",
            "core_data_dir":"","core_listen_addr":"","bridge_listen_addr":"",
            "bridge_captures_dir":"","bridge_core_url":"","bridge_tls_enabled":true,
            "hook_dll_path":"","fifa_game_dir":"","openfut_server_host":"10.0.0.1",
            "game_launch_command":"/home/u/launch.sh"
        }"#;
        let c: LauncherConfig = serde_json::from_str(json).unwrap();
        assert!(!c.game_profile.configured());
        assert_eq!(c.game_profile, GameProfile::default());
        assert!(c.ea_hostnames.is_empty());
    }

    #[test]
    fn a_configured_profile_satisfies_launch_without_a_shell_command() {
        let mut c = LauncherConfig {
            openfut_server_host: "10.10.0.120".into(),
            fut_persona_id: 1,
            fut_persona_name: "X".into(),
            fifa17_tools_dir: "/tmp/tools".into(),
            fifa17_python: "/usr/bin/python3".into(),
            ..LauncherConfig::default()
        };
        c.game_launch_command.clear();
        assert!(
            c.validate_launch_config().is_err(),
            "neither route configured"
        );

        c.game_profile = GameProfile {
            runner: "umu-run".into(),
            executable: "FIFA17.exe".into(),
            game_dir: "/mnt/games/FIFA 17".into(),
            ..GameProfile::default()
        };
        assert!(c.game_profile.configured());
        assert!(c.validate_launch_config().is_ok());
    }

    /// The trap this guards: a profile filled in halfway would fail
    /// `configured()` and quietly fall through to the shell command, so the user
    /// edits the profile and nothing they change has any effect.
    #[test]
    fn a_half_filled_profile_is_an_error_not_a_silent_fallback() {
        let mut c = LauncherConfig {
            openfut_server_host: "10.10.0.120".into(),
            fut_persona_id: 1,
            fut_persona_name: "X".into(),
            fifa17_tools_dir: "/tmp/tools".into(),
            fifa17_python: "/usr/bin/python3".into(),
            game_launch_command: "/home/u/launch.sh".into(),
            ..LauncherConfig::default()
        };
        c.game_profile.runner = "umu-run".into(); // and nothing else
        let err = c.validate_launch_config().unwrap_err();
        assert!(err.contains("executable"), "{err}");
    }

    /// The exact profile block deployed to the FIFA 17 machine.
    ///
    /// `load()` swallows a parse error and returns `Default` — so a config this
    /// binary cannot read would not produce an error, it would silently discard
    /// the user's persona, server and ports. That makes "the shipped config
    /// actually deserializes" a property worth asserting, not assuming.
    #[test]
    fn the_deployed_fifa17_profile_parses_exactly() {
        let json = r#"{
          "core_binary":"","bridge_binary":"","core_database_url":"",
          "core_data_dir":"","core_listen_addr":"","bridge_listen_addr":"",
          "bridge_captures_dir":"","bridge_core_url":"","bridge_tls_enabled":true,
          "hook_dll_path":"","fifa_game_dir":"",
          "openfut_server_host":"10.10.0.120",
          "ea_hostnames":["easw.easports.com"],
          "ea_redirect_probe_ip":"159.153.51.20",
          "game_profile":{
            "env":{"GAMEID":"fifa17","PROTONPATH":"UMU-Proton-10.0-4","STEAM_COMPAT_CONFIG":"sdlinput"},
            "executable":"FIFA17.exe",
            "game_dir":"/mnt/games/FIFA 17",
            "license":{
              "generator":"_fifa17.exe",
              "path":"drive_c/ProgramData/Electronic Arts/EA Services/License/1027460.dlf",
              "timeout_secs":60
            },
            "prefix_links":[{"link":"dosdevices/w:","target":"/mnt"}],
            "runner":"umu-run",
            "wine_prefix":"/home/alex/Games/umu/fifa17"
          }
        }"#;
        let c: LauncherConfig = serde_json::from_str(json).expect("deployed config must parse");
        let p = &c.game_profile;
        assert!(p.configured());
        assert!(p.validate().is_ok());
        assert_eq!(p.runner, "umu-run");
        assert_eq!(
            p.env.get("STEAM_COMPAT_CONFIG").map(String::as_str),
            Some("sdlinput")
        );
        assert_eq!(p.prefix_links.len(), 1);
        let lic = p.license.as_ref().expect("licence block");
        assert_eq!(lic.timeout_secs, 60);
        assert!(lic.path.ends_with("1027460.dlf"));
        assert_eq!(c.ea_redirect_probe_ip, "159.153.51.20");
    }

    /// `configured()` alone decides which launch route runs, so it is pinned
    /// directly rather than only through `validate_launch_config`. All three
    /// fields are required: a profile missing any of them cannot start a game.
    #[test]
    fn configured_requires_runner_executable_and_dir() {
        let mut p = GameProfile::default();
        assert!(!p.configured());
        p.runner = "umu-run".into();
        assert!(!p.configured(), "runner alone is not launchable");
        p.executable = "G.exe".into();
        assert!(!p.configured(), "no game_dir is not launchable");
        p.game_dir = "/games/G".into();
        assert!(p.configured());
        // Whitespace is not configuration.
        p.executable = "   ".into();
        assert!(!p.configured());
    }

    #[test]
    fn prefix_links_must_be_relative_and_have_a_prefix() {
        let mut p = GameProfile {
            runner: "umu-run".into(),
            executable: "G.exe".into(),
            game_dir: "/games/G".into(),
            prefix_links: vec![PrefixLink {
                link: "dosdevices/w:".into(),
                target: "/mnt".into(),
            }],
            ..GameProfile::default()
        };
        assert!(
            p.validate().unwrap_err().contains("wine_prefix"),
            "links without a prefix have nowhere to go"
        );

        p.wine_prefix = "/prefix".into();
        assert!(p.validate().is_ok());

        // An absolute link would be created outside the prefix entirely.
        p.prefix_links[0].link = "/etc/w:".into();
        assert!(p.validate().unwrap_err().contains("relative"));
    }

    #[test]
    fn launch_requires_a_valid_ea_account() {
        let mut c = LauncherConfig::default();
        // A fresh install has no account, and must say so rather than launching
        // FIFA as persona 0.
        assert!(!c.account_configured());
        assert!(c.validate_account().is_err());
        c.fut_persona_id = 12345678;
        assert!(
            !c.account_configured(),
            "an id without a name is not an account"
        );
        assert!(c.validate_account().unwrap_err().contains("persona name"));
        c.fut_persona_name = "TEST_USER".into();
        assert!(c.account_configured());
        assert!(c.validate_account().is_ok());
        c.fut_account_experience = 1001;
        assert!(c.validate_account().unwrap_err().contains("XP"));
    }

    #[test]
    fn onboarding_is_needed_until_both_server_and_account_are_known() {
        // Drives which tab the launcher opens on, so the two halves must both
        // count: a server with no account is still a dead end for a new user.
        let mut c = LauncherConfig::default();
        assert!(c.needs_onboarding());
        c.openfut_server_host = "10.10.0.120".into();
        assert!(
            c.needs_onboarding(),
            "a server alone cannot launch anything"
        );
        c.fut_persona_id = 33_068_179;
        c.fut_persona_name = "CAGE".into();
        assert!(!c.needs_onboarding());
        c.openfut_server_host.clear();
        assert!(c.needs_onboarding(), "losing the server reopens the flow");
    }
}