// <Kira Installer - universal Linux installer.>
// Copyright (C) <2026>  <Kira Foundation>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

/*
   This file contains basic enums and structs to be used with stages.
*/

use std::collections::HashMap;

#[derive(Debug, Clone)]
pub enum ConfigValue {
    String(String),
    I64(i64),
    U64(u64),
    F64(f64),
    Bool(bool),
    Vector(Vec<ConfigValue>),
    Dictionary(HashMap<String, ConfigValue>),
}

#[derive(Debug, Clone)]
pub struct StageResult {
    pub name: String,
    pub config: Option<HashMap<String, ConfigValue>>,
    pub error: Option<String>,
}

impl StageResult {
    pub fn new(name: &str) -> Self {
        Self {
            name: name.into(),
            config: None,
            error: None,
        }
    }

    pub fn add_error(mut self, ex: String) -> Self {
        self.error = Some(ex);
        self
    }

    pub fn add_val(mut self, val_name: &str, conf_val: ConfigValue) -> Self {
        match &mut self.config {
            Some(c) => {
                c.insert(val_name.into(), conf_val);
            }
            None => {
                self.config = Some(HashMap::from([(val_name.into(), conf_val)]));
            }
        }
        self
    }

    pub fn add_val_string(self, val_name: &str, v: String) -> Self {
        self.add_val(val_name, ConfigValue::String(v))
    }

    pub fn add_val_bool(self, val_name: &str, v: bool) -> Self {
        self.add_val(val_name, ConfigValue::Bool(v))
    }

    pub fn add_val_u64(self, val_name: &str, v: u64) -> Self {
        self.add_val(val_name, ConfigValue::U64(v))
    }

    pub fn get_val(&self, val_name: &str) -> Option<ConfigValue> {
        let v = self
            .config
            .as_ref()
            .and_then(|hm| hm.get(val_name).cloned());
        return v;
    }

    pub fn get_val_str(&self, val_name: &str) -> Option<String> {
        match self.get_val(val_name) {
            Some(ConfigValue::String(v)) => Some(v),
            _ => None,
        }
    }

    pub fn get_val_bool(&self, val_name: &str) -> Option<bool> {
        match self.get_val(val_name) {
            Some(ConfigValue::Bool(v)) => Some(v),
            _ => None,
        }
    }
}

pub struct KiraConfig {
    pub config_trail: Vec<StageResult>,
}

impl Default for KiraConfig {
    fn default() -> Self {
        Self {
            config_trail: Vec::new(),
        }
    }
}

impl KiraConfig {
    pub fn get_stage(&self, name: &str) -> Option<StageResult> {
        self.config_trail
            .iter()
            .find(|v| v.name == name)
            .and_then(|v| Some(v.clone()))
    }
    pub fn pop_last(&mut self) -> Option<StageResult> {
        self.config_trail.pop()
    }
    pub fn push(&mut self, stage_result: StageResult) {
        self.config_trail.push(stage_result);
    }
}

#[derive(Debug, Clone)]
pub enum StageAction {
    Back,
    None,
    Next(StageResult),
    Abort,
}