// file: crates/ksp-app-wallet-desk/src/frontend_logging.rs
// version: 1

//! KSP-owned bridge for technical log events emitted by Wallet Desk frontend scripts.

use ts_rs::TS; // rust-rules: trait-import

/// Log payload sent by Wallet Desk frontend scripts.
#[derive(Clone, Debug, serde::Deserialize, TS)]
#[serde(rename_all = "camelCase")]
#[ts(export, export_to = "../frontend/ts/bindings/ksp_app_wallet_desk/frontend_logging/FrontendLogPayloadDto.ts")]
pub(crate) struct FrontendLogPayloadDto {
    /// Lowercase KSP log level.
    pub(crate) level: String,
    /// Whitelisted logical frontend target identifier.
    pub(crate) target_id: String,
    /// Rendered technical frontend message.
    pub(crate) message: String,
}

#[derive(Clone, Copy, Debug, Eq, PartialEq)]
enum FrontendLogLevel {
    Debug,
    Error,
    Info,
    Trace,
    Warn,
}

#[derive(Clone, Copy, Debug, Eq, PartialEq)]
enum FrontendLogTarget {
    Frontend,
    Main,
    Splash,
}

/// Emits one validated frontend event through the KSP Logging facade.
pub(crate) fn emit_frontend_log_event(payload: FrontendLogPayloadDto) -> ksp_core_lib::Result<()> {
    let level = parse_level(payload.level.as_str());
    let level = match level {
        std::result::Result::Ok(value) => value,
        std::result::Result::Err(error) => return std::result::Result::Err(error),
    };
    let target = parse_target(payload.target_id.as_str());
    let target = match target {
        std::result::Result::Ok(value) => value,
        std::result::Result::Err(error) => return std::result::Result::Err(error),
    };
    emit_validated_frontend_log(level, target, payload.message.as_str());
    return std::result::Result::Ok(());
}

fn parse_level(level: &str) -> ksp_core_lib::Result<FrontendLogLevel> {
    return match level.trim().to_ascii_lowercase().as_str() {
        "debug" => std::result::Result::Ok(FrontendLogLevel::Debug),
        "error" => std::result::Result::Ok(FrontendLogLevel::Error),
        "info" => std::result::Result::Ok(FrontendLogLevel::Info),
        "trace" => std::result::Result::Ok(FrontendLogLevel::Trace),
        "warn" => std::result::Result::Ok(FrontendLogLevel::Warn),
        _ => std::result::Result::Err(ksp_core_lib::Error::new(crate::ERROR_CODE_FRONTEND_LOG_LEVEL_INVALID, "Frontend log level is not supported")),
    };
}

fn parse_target(target_id: &str) -> ksp_core_lib::Result<FrontendLogTarget> {
    return match target_id.trim().to_ascii_lowercase().as_str() {
        "frontend" => std::result::Result::Ok(FrontendLogTarget::Frontend),
        "main" => std::result::Result::Ok(FrontendLogTarget::Main),
        "splash" => std::result::Result::Ok(FrontendLogTarget::Splash),
        _ => {
            std::result::Result::Err(ksp_core_lib::Error::new(crate::ERROR_CODE_FRONTEND_LOG_TARGET_INVALID, "Frontend log target identifier is not supported"))
        },
    };
}

fn emit_validated_frontend_log(level: FrontendLogLevel, target: FrontendLogTarget, message: &str) {
    return match target {
        FrontendLogTarget::Frontend => emit_frontend_target(level, message),
        FrontendLogTarget::Main => emit_main_target(level, message),
        FrontendLogTarget::Splash => emit_splash_target(level, message),
    };
}

fn emit_frontend_target(level: FrontendLogLevel, message: &str) {
    return match level {
        FrontendLogLevel::Debug => {
            ksp_logging_lib::debug!(target: crate::TRACING_TARGET_FRONTEND, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "frontend", "{message}")
        },
        FrontendLogLevel::Error => {
            ksp_logging_lib::error!(target: crate::TRACING_TARGET_FRONTEND, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "frontend", "{message}")
        },
        FrontendLogLevel::Info => {
            ksp_logging_lib::info!(target: crate::TRACING_TARGET_FRONTEND, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "frontend", "{message}")
        },
        FrontendLogLevel::Trace => {
            ksp_logging_lib::trace!(target: crate::TRACING_TARGET_FRONTEND, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "frontend", "{message}")
        },
        FrontendLogLevel::Warn => {
            ksp_logging_lib::warn!(target: crate::TRACING_TARGET_FRONTEND, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "frontend", "{message}")
        },
    };
}

fn emit_main_target(level: FrontendLogLevel, message: &str) {
    return match level {
        FrontendLogLevel::Debug => {
            ksp_logging_lib::debug!(target: crate::TRACING_TARGET_FRONTEND_MAIN, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "main", "{message}")
        },
        FrontendLogLevel::Error => {
            ksp_logging_lib::error!(target: crate::TRACING_TARGET_FRONTEND_MAIN, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "main", "{message}")
        },
        FrontendLogLevel::Info => {
            ksp_logging_lib::info!(target: crate::TRACING_TARGET_FRONTEND_MAIN, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "main", "{message}")
        },
        FrontendLogLevel::Trace => {
            ksp_logging_lib::trace!(target: crate::TRACING_TARGET_FRONTEND_MAIN, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "main", "{message}")
        },
        FrontendLogLevel::Warn => {
            ksp_logging_lib::warn!(target: crate::TRACING_TARGET_FRONTEND_MAIN, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "main", "{message}")
        },
    };
}

fn emit_splash_target(level: FrontendLogLevel, message: &str) {
    return match level {
        FrontendLogLevel::Debug => {
            ksp_logging_lib::debug!(target: crate::TRACING_TARGET_FRONTEND_SPLASH, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "splash", "{message}")
        },
        FrontendLogLevel::Error => {
            ksp_logging_lib::error!(target: crate::TRACING_TARGET_FRONTEND_SPLASH, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "splash", "{message}")
        },
        FrontendLogLevel::Info => {
            ksp_logging_lib::info!(target: crate::TRACING_TARGET_FRONTEND_SPLASH, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "splash", "{message}")
        },
        FrontendLogLevel::Trace => {
            ksp_logging_lib::trace!(target: crate::TRACING_TARGET_FRONTEND_SPLASH, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "splash", "{message}")
        },
        FrontendLogLevel::Warn => {
            ksp_logging_lib::warn!(target: crate::TRACING_TARGET_FRONTEND_SPLASH, domain = crate::TRACING_DOMAIN_FRONTEND, action = "frontend_log", target_id = "splash", "{message}")
        },
    };
}

#[cfg(test)]
#[path = "../unit_tests/frontend_logging.rs"]
mod tests;