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use codegen::*;
use internal::*;
use templating::*;
use util::*;

use amq_protocol_types::*;
use serde_json::{self, Value};

#[derive(Debug, Serialize)]
pub struct AMQProtocolDefinition {
    pub name:          String,
    pub major_version: u8,
    pub minor_version: u8,
    pub revision:      u8,
    pub port:          u32,
    pub copyright:     Vec<String>,
    pub domains:       Vec<AMQPDomain>,
    pub constants:     Vec<AMQPConstant>,
    pub classes:       Vec<AMQPClass>,
}

impl AMQProtocolDefinition {
    pub fn load() -> AMQProtocolDefinition {
        let specs = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/specs/amqp-rabbitmq-0.9.1.json"));

        serde_json::from_str::<_AMQProtocolDefinition>(specs).expect("Failed to parse AMQP specs file").to_specs()
    }

    pub fn code_generator(self, templates: AMQPTemplates) -> CodeGenerator {
        CodeGenerator::new(self, templates)
    }
}

#[derive(Debug, Serialize)]
pub struct AMQPDomain {
    pub name:      String,
    #[serde(rename="type")]
    pub amqp_type: AMQPType,
}

#[derive(Debug, Deserialize, Serialize)]
pub struct AMQPConstant {
    pub name:  String,
    pub value: u16,
    #[serde(rename="class")]
    pub klass: Option<String>,
}

#[derive(Debug, Serialize)]
pub struct AMQPClass {
    pub id:         u8,
    pub methods:    Vec<AMQPMethod>,
    pub name:       String,
    pub properties: Option<Vec<AMQPProperty>>,
}

#[derive(Debug, Serialize)]
pub struct AMQPMethod {
    pub id:          u8,
    pub arguments:   Vec<AMQPArgument>,
    pub name:        String,
    pub synchronous: Option<bool>,
}

#[derive(Debug, Serialize)]
pub struct AMQPArgument {
    #[serde(rename="type")]
    pub amqp_type:     Option<AMQPType>,
    pub name:          String,
    pub default_value: Option<Value>,
    pub domain:        Option<String>,
}

#[derive(Debug, Serialize)]
pub struct AMQPProperty {
    #[serde(rename="type")]
    pub amqp_type: AMQPType,
    pub name:      String,
}

// FIXME: Drop everything below this
impl AMQPConstant {
    pub fn serialize_class(&self) -> String {
        match self.klass {
            Some(ref klass) => format!("Some(\"{}\".to_string())", klass),
            None            => "None".to_string(),
        }
    }
}

impl AMQPArgument {
    pub fn serialize_default_value(&self) -> String {
        if let Some(ref default_value) = self.default_value {
            let s = default_value.to_string();
            match default_value {
                /* TODO: simplify that, handle Table */
                &Value::String(_) => format!("Some({}.to_string())", s),
                &Value::Number(_) => format!("Some({})", s),
                &Value::Bool(_)   => format!("Some({})", s),
                _                 => "None".to_string(),
            }
        } else {
            "None".to_string()
        }
    }

    pub fn serialize_domain(&self) -> String {
        if let Some(ref domain) = self.domain {
            format!("Some(\"{}\".to_string())", domain)
        } else {
            "None".to_string()
        }
    }

    pub fn codegen_field(&self) -> String {
        format!("pub {}: {},", snake_name(&self.name), camel_name(&self.name))
    }
}