use super::merge_headers;
use crate::blob_manager::BlobManager;
use crate::client_db::ClientDb;
use crate::error::Result;
use crate::models::{
    AnyModel, CookieJar, CookieJarIden, Environment, EnvironmentIden, Folder, FolderIden,
    GraphQlIntrospection, GraphQlIntrospectionIden, GrpcConnection, GrpcConnectionIden, GrpcEvent,
    GrpcEventIden, GrpcRequest, GrpcRequestIden, HttpRequest, HttpRequestHeader, HttpRequestIden,
    HttpResponse, HttpResponseEvent, HttpResponseEventIden, HttpResponseIden,
    ResolvedHttpRequestSettings, ResolvedSetting, SyncState, SyncStateIden, WebsocketConnection,
    WebsocketConnectionIden, WebsocketEvent, WebsocketEventIden, WebsocketRequest,
    WebsocketRequestIden, Workspace, WorkspaceIden, WorkspaceMeta, WorkspaceMetaIden,
};
use crate::util::UpdateSource;
use log::warn;
use serde_json::Value;
use std::collections::BTreeMap;

impl<'a> ClientDb<'a> {
    pub fn get_workspace(&self, id: &str) -> Result<Workspace> {
        self.find_one(WorkspaceIden::Id, id)
    }

    pub fn list_workspaces(&self) -> Result<Vec<Workspace>> {
        let mut workspaces = self.find_all()?;

        if workspaces.is_empty() {
            workspaces.push(self.upsert_workspace(
                &Workspace { name: "Yaak".to_string(), ..Default::default() },
                &UpdateSource::Background,
            )?)
        }

        Ok(workspaces)
    }

    /// Delete a workspace and everything in it.
    ///
    /// Children are bulk-deleted with one statement per table and are NOT
    /// individually recorded in model_changes or emitted as events — the single
    /// workspace delete event implies the subtree (see [`ModelChangeEvent::Delete`]).
    /// This keeps huge workspaces (thousands of requests) fast and avoids
    /// flooding event consumers.
    pub fn delete_workspace(
        &self,
        workspace: &Workspace,
        source: &UpdateSource,
        blobs: &BlobManager,
    ) -> Result<Workspace> {
        let wid = workspace.id.as_str();

        // Collect response cleanup targets before their rows disappear. The actual
        // cleanup runs at the end: response bodies live on disk and in the blob DB,
        // which don't participate in this transaction, so removing them must wait
        // until every statement that could fail (and roll back the rows) is done.
        let responses = self.find_many::<HttpResponse>(HttpResponseIden::WorkspaceId, wid, None)?;

        // Sync and the CLI call this on a plain connection where each statement
        // would otherwise commit on its own, leaving a partially-deleted workspace
        // if one fails. A savepoint makes the cascade atomic there, and nests
        // harmlessly inside the interactive path's transaction.
        let conn = self.conn().resolve();
        conn.execute_batch("SAVEPOINT delete_workspace")?;

        let result: Result<Workspace> = (|| {
            self.delete_many_untracked::<HttpResponseEvent>(
                HttpResponseEventIden::WorkspaceId,
                wid,
            )?;
            self.delete_many_untracked::<HttpResponse>(HttpResponseIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<HttpRequest>(HttpRequestIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<GrpcEvent>(GrpcEventIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<GrpcConnection>(GrpcConnectionIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<GrpcRequest>(GrpcRequestIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<WebsocketEvent>(WebsocketEventIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<WebsocketConnection>(
                WebsocketConnectionIden::WorkspaceId,
                wid,
            )?;
            self.delete_many_untracked::<WebsocketRequest>(WebsocketRequestIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<GraphQlIntrospection>(
                GraphQlIntrospectionIden::WorkspaceId,
                wid,
            )?;
            self.delete_many_untracked::<Folder>(FolderIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<Environment>(EnvironmentIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<CookieJar>(CookieJarIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<SyncState>(SyncStateIden::WorkspaceId, wid)?;
            self.delete_many_untracked::<WorkspaceMeta>(WorkspaceMetaIden::WorkspaceId, wid)?;
            self.delete(workspace, source)
        })();

        let deleted = match result {
            Ok(deleted) => {
                conn.execute_batch("RELEASE delete_workspace")?;
                deleted
            }
            Err(e) => {
                let _ = conn
                    .execute_batch("ROLLBACK TO delete_workspace; RELEASE delete_workspace");
                return Err(e);
            }
        };

        // Best-effort cleanup of response bodies (disk files and blob chunks).
        // Failures only orphan unreferenced data, and are logged.
        let blob_ctx = blobs.connect();
        for m in responses {
            if let Some(p) = m.body_path {
                if let Err(e) = std::fs::remove_file(&p) {
                    warn!("Failed to delete response body file {p:?}: {e}");
                }
            }
            if let Err(e) = blob_ctx.delete_chunks_like(&format!("{}.%", m.id)) {
                warn!("Failed to delete blobs for response {}: {e}", m.id);
            }
        }

        Ok(deleted)
    }

    pub fn delete_workspace_by_id(
        &self,
        id: &str,
        source: &UpdateSource,
        blobs: &BlobManager,
    ) -> Result<Workspace> {
        let workspace = self.get_workspace(id)?;
        self.delete_workspace(&workspace, source, blobs)
    }

    pub fn upsert_workspace(&self, w: &Workspace, source: &UpdateSource) -> Result<Workspace> {
        self.upsert(w, source)
    }

    pub fn resolve_auth_for_workspace(
        &self,
        workspace: &Workspace,
    ) -> (Option<String>, BTreeMap<String, Value>, String) {
        (
            workspace.authentication_type.clone(),
            workspace.authentication.clone(),
            workspace.id.clone(),
        )
    }

    pub fn resolve_headers_for_workspace(&self, workspace: &Workspace) -> Vec<HttpRequestHeader> {
        merge_headers(default_headers(), workspace.headers.clone())
    }

    pub fn resolve_settings_for_workspace(
        &self,
        workspace: &Workspace,
    ) -> ResolvedHttpRequestSettings {
        ResolvedHttpRequestSettings {
            validate_certificates: ResolvedSetting::from_model(
                workspace.setting_validate_certificates,
                AnyModel::Workspace(workspace.clone()),
            ),
            follow_redirects: ResolvedSetting::from_model(
                workspace.setting_follow_redirects,
                AnyModel::Workspace(workspace.clone()),
            ),
            request_timeout: ResolvedSetting::from_model(
                workspace.setting_request_timeout,
                AnyModel::Workspace(workspace.clone()),
            ),
            request_message_size: ResolvedSetting::from_model(
                workspace.setting_request_message_size,
                AnyModel::Workspace(workspace.clone()),
            ),
            send_cookies: ResolvedSetting::from_model(
                workspace.setting_send_cookies,
                AnyModel::Workspace(workspace.clone()),
            ),
            store_cookies: ResolvedSetting::from_model(
                workspace.setting_store_cookies,
                AnyModel::Workspace(workspace.clone()),
            ),
        }
    }
}

/// Global default headers that are always sent with requests unless overridden.
/// These are prepended to the inheritance chain so workspace/folder/request headers
/// can override or disable them.
pub fn default_headers() -> Vec<HttpRequestHeader> {
    vec![
        HttpRequestHeader {
            name: "User-Agent".to_string(),
            value: "yaak".to_string(),
            ..Default::default()
        },
        HttpRequestHeader {
            name: "Accept".to_string(),
            value: "*/*".to_string(),
            ..Default::default()
        },
    ]
}

#[cfg(test)]
mod tests {
    use crate::init_in_memory;

    #[test]
    fn bootstraps_first_workspace_with_real_defaults() {
        let (query_manager, _blob_manager, _rx) = init_in_memory().expect("Failed to init DB");
        let db = query_manager.connect();

        let workspaces = db.list_workspaces().expect("Failed to list workspaces");
        let workspace = workspaces.first().expect("No workspace was bootstrapped");

        // This workspace is built in Rust and never deserialized, so it only gets
        // these values if `Workspace::default()` carries them. Asserted through the
        // DB round trip, since the column values are what a fresh install lives with.
        assert!(workspace.setting_send_cookies, "setting_send_cookies");
        assert!(workspace.setting_store_cookies, "setting_store_cookies");
        assert!(workspace.setting_follow_redirects, "setting_follow_redirects");
        assert!(workspace.setting_validate_certificates, "setting_validate_certificates");
        assert_eq!(
            workspace.setting_request_message_size,
            crate::models::DEFAULT_REQUEST_MESSAGE_SIZE
        );
    }
}