use crate::{
    db::{self, Update},
    request::{
        self,
        url::{RequestUrl, RequestUrlOwned, Segment, UrlError},
        EntryRequestBody, HttpRequestParameters, HttpResponse, RequestBody, RequestHeader,
        RequestHeaderInsert, RequestHeaderUpdate, RequestPathParam, RequestPathUpdate,
    },
    state::AppState,
    var::{expand_vars, parse_vars},
    workspace::{
        Workspace, WorkspaceEntry, WorkspaceEntryBase, WorkspaceEntryCreate, WorkspaceEntryUpdate,
        WorkspaceEntryUpdateBase, WorkspaceEnvVariable, WorkspaceEnvironment,
    },
};
use tauri_plugin_log::log;

#[tauri::command]
pub async fn list_workspaces(state: tauri::State<'_, AppState>) -> Result<Vec<Workspace>, String> {
    match db::list_workspaces(state.db.clone()).await {
        Ok(ws) => Ok(ws),
        Err(e) => Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn create_workspace(
    state: tauri::State<'_, AppState>,
    name: String,
) -> Result<Workspace, String> {
    match db::create_workspace(state.db.clone(), name).await {
        Ok(ws) => Ok(ws),
        Err(e) => Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn list_workspace_entries(
    state: tauri::State<'_, AppState>,
    id: i64,
) -> Result<Vec<WorkspaceEntry>, String> {
    match db::list_workspace_entries(state.db.clone(), id).await {
        Ok(ws) => Ok(ws),
        Err(e) => Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn create_workspace_entry(
    state: tauri::State<'_, AppState>,
    data: WorkspaceEntryCreate,
) -> Result<WorkspaceEntryBase, String> {
    match db::create_workspace_entry(state.db.clone(), data).await {
        Ok(ws) => Ok(ws),
        Err(e) => Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn update_workspace_entry(
    state: tauri::State<'_, AppState>,
    entry_id: i64,
    data: WorkspaceEntryUpdate,
) -> Result<(), String> {
    match db::update_workspace_entry(state.db.clone(), entry_id, data).await {
        Ok(()) => Ok(()),
        Err(e) => Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn insert_request_body(
    state: tauri::State<'_, AppState>,
    entry_id: i64,
    body: RequestBody,
) -> Result<EntryRequestBody, String> {
    match db::insert_request_body(state.db.clone(), entry_id, body).await {
        Ok(b) => Ok(b),
        Err(e) => return Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn update_request_body(
    state: tauri::State<'_, AppState>,
    id: i64,
    body: Update<RequestBody>,
) -> Result<(), String> {
    if let Err(e) = db::update_request_body(state.db.clone(), id, body).await {
        return Err(e.to_string());
    }
    Ok(())
}

#[tauri::command]
pub async fn parse_url(url: String) -> Result<RequestUrlOwned, UrlError> {
    match RequestUrl::parse(&url) {
        Ok(url_parsed) => Ok(url_parsed.into()),
        Err(e) => {
            log::debug!("{e:?}");
            Err(UrlError::Parse(e))
        }
    }
}

#[tauri::command]
pub async fn expand_url(
    state: tauri::State<'_, AppState>,
    entry_id: i64,
    env_id: Option<i64>,
    mut url: String,
) -> Result<String, UrlError> {
    if let Some(env_id) = env_id {
        let vars = match parse_vars(&url) {
            Ok(vars) => vars.iter().map(|v| v.name).collect::<Vec<_>>(),
            Err(e) => return Err(UrlError::Var(e.to_string())),
        };

        if !vars.is_empty() {
            let vars = match db::get_env_variables(state.db.clone(), env_id, &vars).await {
                Ok(v) => v,
                Err(e) => return Err(UrlError::Db(e.to_string())),
            };

            url = expand_vars(&url, &vars);
        }
    }

    match RequestUrl::parse(&url) {
        Ok(mut url) => {
            let params = match db::list_request_path_params(state.db.clone(), entry_id).await {
                Ok(p) => p,
                Err(e) => return Err(UrlError::Db(e.to_string())),
            };

            url.populate_path(
                params
                    .iter()
                    .map(|p| (p.name.as_str(), p.value.as_str()))
                    .collect(),
            );

            let url = url.to_string();

            let vars = match parse_vars(&url) {
                Ok(vars) => vars.iter().map(|v| v.name).collect::<Vec<_>>(),
                Err(e) => return Err(UrlError::Var(e.to_string())),
            };

            if vars.is_empty() {
                return Ok(url);
            }

            let Some(env_id) = env_id else {
                return Ok(url);
            };

            let vars = match db::get_env_variables(state.db.clone(), env_id, &vars).await {
                Ok(v) => v,
                Err(e) => return Err(UrlError::Db(e.to_string())),
            };

            Ok(expand_vars(&url.to_string(), &vars))
        }
        Err(e) => {
            log::debug!("{e:?}");
            Err(UrlError::Parse(e))
        }
    }
}

/// Updates a URL.
///
/// * `entry_id`: The request entry ID  whose URL will be updated.
/// * `env_id`: The environment to use for expanding variables.
/// * `url`: The URL string which will be populated from the env and parsed with [RequestUrl].
/// * `path_params`: List of dynamic path params to persist for the URL.
#[tauri::command]
pub async fn update_url(
    state: tauri::State<'_, AppState>,
    entry_id: i64,
    use_path_params: bool,
    url: String,
    // Dynamic path params
    path_params: Vec<RequestPathParam>,
) -> Result<(RequestUrlOwned, Vec<RequestPathParam>), UrlError> {
    match RequestUrl::parse(&url) {
        Ok(mut url_parsed) => {
            let mut update: Vec<RequestPathUpdate> = vec![];
            let mut subs = vec![];

            for seg in url_parsed.path.iter_mut() {
                if let Segment::Dynamic(seg, position) = seg {
                    let Some(path_param) = path_params
                        .iter()
                        .find(|pp| pp.position as usize == *position || &pp.name == seg)
                    else {
                        update.push(RequestPathUpdate {
                            position: *position,
                            name: seg.to_string(),
                            value: None,
                        });
                        continue;
                    };

                    if use_path_params {
                        update.push(RequestPathUpdate {
                            position: *position,
                            name: path_param.name.clone(),
                            value: Some(path_param.value.clone()),
                        });
                        subs.push(Segment::Dynamic(&path_param.name, *position));
                    } else {
                        update.push(RequestPathUpdate {
                            position: *position,
                            name: seg.to_string(),
                            value: Some(path_param.value.clone()),
                        })
                    }
                }
            }

            dbg!(&subs);
            for sub in subs {
                url_parsed.swap_path_segment(sub);
            }
            dbg!(&update, &url_parsed);

            db::update_workspace_entry(
                state.db.clone(),
                entry_id,
                WorkspaceEntryUpdate::Request {
                    path_params: Some(update),
                    url: Some(url_parsed.to_string()),
                    base: WorkspaceEntryUpdateBase::default(),
                    method: None,
                },
            )
            .await
            .map_err(|e| UrlError::Db(e.to_string()))?;

            let params = match db::list_request_path_params(state.db.clone(), entry_id).await {
                Ok(p) => p,
                Err(e) => return Err(UrlError::Db(e.to_string())),
            };

            dbg!(&url_parsed, &params);

            Ok((url_parsed.into(), params))
        }
        Err(e) => {
            log::debug!("{e:?}");
            Err(UrlError::Parse(e))
        }
    }
}

#[tauri::command]
pub async fn send_request(
    state: tauri::State<'_, AppState>,
    req_id: i64,
    env_id: Option<i64>,
) -> Result<HttpResponse, String> {
    let mut req = match db::get_workspace_request(state.db.clone(), req_id).await {
        Ok(req) => req,
        Err(e) => return Err(e.to_string()),
    };

    req.url = if let Some(env_id) = env_id {
        let vars = match parse_vars(&req.url) {
            Ok(vars) => vars.iter().map(|v| v.name).collect::<Vec<_>>(),
            Err(e) => return Err(e.to_string()),
        };

        let vars = match db::get_env_variables(state.db.clone(), env_id, &vars).await {
            Ok(v) => v,
            Err(e) => return Err(e.to_string()),
        };

        expand_vars(&req.url, &vars)
    } else {
        req.url
    };

    let req = match RequestUrl::parse(&req.url.to_string()) {
        Ok(mut url) => {
            let params = match db::list_request_path_params(state.db.clone(), req_id).await {
                Ok(p) => p,
                Err(e) => return Err(e.to_string()),
            };

            url.populate_path(
                params
                    .iter()
                    .map(|p| (p.name.as_str(), p.value.as_str()))
                    .collect(),
            );

            req.url = url.to_string();

            let vars = match parse_vars(&req.url) {
                Ok(vars) => vars.iter().map(|v| v.name).collect::<Vec<_>>(),
                Err(e) => return Err(e.to_string()),
            };

            req.url = if let Some(env_id) = env_id {
                let vars = match db::get_env_variables(state.db.clone(), env_id, &vars).await {
                    Ok(v) => v,
                    Err(e) => return Err(e.to_string()),
                };

                expand_vars(&url.to_string(), &vars)
            } else {
                req.url
            };

            HttpRequestParameters::try_from(req)?
        }
        Err(e) => {
            log::debug!("{e:?}");
            return Err(String::from("error parsing URL"));
        }
    };

    let response = match request::send(state.client.clone(), req).await {
        Ok(res) => res,
        Err(e) => return Err(e.to_string()),
    };

    Ok(response)
}

#[tauri::command]
pub async fn list_environments(
    state: tauri::State<'_, AppState>,
    workspace_id: i64,
) -> Result<Vec<WorkspaceEnvironment>, String> {
    match db::list_environments(state.db.clone(), workspace_id).await {
        Ok(ws) => Ok(ws),
        Err(e) => Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn create_env(
    state: tauri::State<'_, AppState>,
    workspace_id: i64,
    name: String,
) -> Result<WorkspaceEnvironment, String> {
    match db::create_environment(state.db.clone(), workspace_id, name).await {
        Ok(ws) => Ok(ws),
        Err(e) => Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn update_env(
    state: tauri::State<'_, AppState>,
    id: i64,
    name: String,
) -> Result<(), String> {
    if let Err(e) = db::update_environment(state.db.clone(), id, name).await {
        return Err(e.to_string());
    }
    Ok(())
}

#[tauri::command]
pub async fn insert_env_var(
    state: tauri::State<'_, AppState>,
    workspace_id: i64,
    env_id: i64,
    name: String,
    value: String,
    secret: bool,
) -> Result<WorkspaceEnvVariable, String> {
    match db::insert_env_var(state.db.clone(), workspace_id, env_id, name, value, secret).await {
        Ok(var) => Ok(var),
        Err(e) => Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn update_env_var(
    state: tauri::State<'_, AppState>,
    id: i64,
    name: Option<String>,
    value: Option<String>,
    secret: Option<bool>,
) -> Result<(), String> {
    if let Err(e) = db::update_env_var(state.db.clone(), id, name, value, secret).await {
        return Err(e.to_string());
    }
    Ok(())
}

#[tauri::command]
pub async fn delete_env_var(state: tauri::State<'_, AppState>, id: i64) -> Result<(), String> {
    if let Err(e) = db::delete_env_var(state.db.clone(), id).await {
        return Err(e.to_string());
    }
    Ok(())
}

#[tauri::command]
pub async fn insert_header(
    state: tauri::State<'_, AppState>,
    entry_id: i64,
    insert: RequestHeaderInsert,
) -> Result<RequestHeader, String> {
    match db::insert_headers(state.db.clone(), entry_id, vec![insert]).await {
        Ok(header) => Ok(header),
        Err(e) => return Err(e.to_string()),
    }
}

#[tauri::command]
pub async fn update_header(
    state: tauri::State<'_, AppState>,
    update: RequestHeaderUpdate,
) -> Result<(), String> {
    if let Err(e) = db::update_header(state.db.clone(), update).await {
        return Err(e.to_string());
    }
    Ok(())
}

#[tauri::command]
pub async fn delete_header(
    state: tauri::State<'_, AppState>,
    header_id: i64,
) -> Result<(), String> {
    if let Err(e) = db::delete_header(state.db.clone(), header_id).await {
        return Err(e.to_string());
    }
    Ok(())
}