use std::collections::HashMap;

use anyhow::{anyhow, Context, Result};
use async_trait::async_trait;
use cynic::{MutationBuilder, QueryBuilder};
use galaxy_graphql::mutations::issue_task_identity_token::{
    IssueTaskIdentityToken, IssueTaskIdentityTokenInput, IssueTaskIdentityTokenResult,
    IssueTaskIdentityTokenVariables,
};
use galaxy_graphql::object_permissions::OwnerType;
use galaxy_graphql::queries::list_managed_secrets::{
    ListManagedSecrets, ListManagedSecretsVariables, ManagedSecretsInput, ManagedSecretsResult,
};
use galaxy_graphql::queries::managed_secret_config::{
    GetManagedSecretConfig, GetManagedSecretConfigVariables, UserResult,
};
use galaxy_graphql::queries::task_secrets::{
    ManagedSecretValue, TaskSecrets, TaskSecretsInput, TaskSecretsResult, TaskSecretsVariables,
};
use galaxy_graphql::{
    managed_secrets::{ManagedSecret, ManagedSecretType},
    mutations::{
        create_managed_secret::{
            CreateManagedSecret, CreateManagedSecretInput, CreateManagedSecretResult,
            CreateManagedSecretVariables,
        },
        delete_managed_secret::{
            DeleteManagedSecret, DeleteManagedSecretInput, DeleteManagedSecretResult,
            DeleteManagedSecretVariables,
        },
        update_managed_secret::{
            UpdateManagedSecret, UpdateManagedSecretInput, UpdateManagedSecretResult,
            UpdateManagedSecretVariables,
        },
    },
    object_permissions::Owner,
};
use galaxy_managed_secrets::client::{SecretOwner, TaskIdentityToken};

use super::ServerApi;
use crate::server::graphql::{get_request_context, get_user_facing_error_message};

pub use galaxy_managed_secrets::client::{ManagedSecretConfigs, ManagedSecretsClient};

#[cfg_attr(not(target_family = "wasm"), async_trait)]
#[cfg_attr(target_family = "wasm", async_trait(?Send))]
impl ManagedSecretsClient for ServerApi {
    async fn get_managed_secret_configs(&self) -> Result<ManagedSecretConfigs> {
        let variables = GetManagedSecretConfigVariables {
            request_context: get_request_context(),
        };
        let operation = GetManagedSecretConfig::build(variables);
        let response = self.send_graphql_request(operation, None).await?;

        match response.user {
            UserResult::UserOutput(output) => {
                let mut team_configs = HashMap::new();
                for workspace in output.user.workspaces {
                    for team in workspace.teams {
                        if let Some(config) = team.managed_secrets {
                            // DO NOT inline the `insert` call into the `debug_assert!` macro. It will get compiled out in release builds.
                            let prior_config = team_configs.insert(team.uid.into_inner(), config);
                            debug_assert!(
                                prior_config.is_none(),
                                "Duplicate team UID returned from server"
                            );
                        }
                    }
                }
                Ok(ManagedSecretConfigs {
                    user_secrets: output.user.managed_secrets,
                    team_secrets: team_configs,
                })
            }
            UserResult::UserFacingError(error) => {
                Err(anyhow!(get_user_facing_error_message(error)))
            }
            UserResult::Unknown => Err(anyhow!(
                "Unknown error while getting managed secret configs"
            )),
        }
    }

    async fn create_managed_secret(
        &self,
        owner: SecretOwner,
        name: String,
        secret_type: ManagedSecretType,
        encrypted_value: String,
        description: Option<String>,
    ) -> Result<ManagedSecret> {
        let graphql_owner = match owner {
            SecretOwner::CurrentUser => Owner {
                type_: OwnerType::User,
                uid: None,
            },
            SecretOwner::Team { team_uid } => Owner {
                type_: OwnerType::Team,
                uid: Some(cynic::Id::new(team_uid)),
            },
        };

        let variables = CreateManagedSecretVariables {
            input: CreateManagedSecretInput {
                description,
                encrypted_value,
                name,
                owner: graphql_owner,
                type_: secret_type,
            },
            request_context: get_request_context(),
        };
        let operation = CreateManagedSecret::build(variables);
        let response = self.send_graphql_request(operation, None).await?;

        match response.create_managed_secret {
            CreateManagedSecretResult::CreateManagedSecretOutput(output) => {
                Ok(output.managed_secret)
            }
            CreateManagedSecretResult::UserFacingError(error) => {
                Err(anyhow!(get_user_facing_error_message(error)))
            }
            CreateManagedSecretResult::Unknown => {
                Err(anyhow!("Unknown error while creating managed secret"))
            }
        }
    }

    async fn delete_managed_secret(&self, owner: SecretOwner, name: String) -> Result<()> {
        let graphql_owner = match owner {
            SecretOwner::CurrentUser => Owner {
                type_: OwnerType::User,
                uid: None,
            },
            SecretOwner::Team { team_uid } => Owner {
                type_: OwnerType::Team,
                uid: Some(cynic::Id::new(team_uid)),
            },
        };

        let variables = DeleteManagedSecretVariables {
            input: DeleteManagedSecretInput {
                name,
                owner: graphql_owner,
            },
            request_context: get_request_context(),
        };
        let operation = DeleteManagedSecret::build(variables);
        let response = self.send_graphql_request(operation, None).await?;

        match response.delete_managed_secret {
            DeleteManagedSecretResult::DeleteManagedSecretOutput(_) => Ok(()),
            DeleteManagedSecretResult::UserFacingError(error) => {
                Err(anyhow!(get_user_facing_error_message(error)))
            }
            DeleteManagedSecretResult::Unknown => {
                Err(anyhow!("Unknown error while deleting managed secret"))
            }
        }
    }

    async fn update_managed_secret(
        &self,
        owner: SecretOwner,
        name: String,
        encrypted_value: Option<String>,
        description: Option<String>,
    ) -> Result<ManagedSecret> {
        let graphql_owner = match owner {
            SecretOwner::CurrentUser => Owner {
                type_: OwnerType::User,
                uid: None,
            },
            SecretOwner::Team { team_uid } => Owner {
                type_: OwnerType::Team,
                uid: Some(cynic::Id::new(team_uid)),
            },
        };

        let variables = UpdateManagedSecretVariables {
            input: UpdateManagedSecretInput {
                name,
                owner: graphql_owner,
                encrypted_value,
                description,
            },
            request_context: get_request_context(),
        };
        let operation = UpdateManagedSecret::build(variables);
        let response = self.send_graphql_request(operation, None).await?;

        match response.update_managed_secret {
            UpdateManagedSecretResult::UpdateManagedSecretOutput(output) => {
                Ok(output.managed_secret)
            }
            UpdateManagedSecretResult::UserFacingError(error) => {
                Err(anyhow!(get_user_facing_error_message(error)))
            }
            UpdateManagedSecretResult::Unknown => {
                Err(anyhow!("Unknown error while updating managed secret"))
            }
        }
    }

    async fn list_secrets(&self) -> Result<Vec<ManagedSecret>> {
        let variables = ListManagedSecretsVariables {
            // Pagination over managed secrets is not yet supported.
            input: ManagedSecretsInput { cursor: None },
            request_context: get_request_context(),
        };
        let operation = ListManagedSecrets::build(variables);
        let response = self.send_graphql_request(operation, None).await?;

        match response.managed_secrets {
            ManagedSecretsResult::ManagedSecretsOutput(output) => Ok(output.managed_secrets),
            ManagedSecretsResult::UserFacingError(error) => {
                Err(anyhow!(get_user_facing_error_message(error)))
            }
            ManagedSecretsResult::Unknown => {
                Err(anyhow!("Unknown error while listing managed secrets"))
            }
        }
    }

    async fn get_task_secrets(
        &self,
        task_id: String,
        workload_token: String,
    ) -> Result<HashMap<String, ManagedSecretValue>> {
        let variables = TaskSecretsVariables {
            input: TaskSecretsInput {
                task_id: cynic::Id::new(task_id),
                workload_token,
            },
            request_context: get_request_context(),
        };
        let operation = TaskSecrets::build(variables);
        let response = self.send_graphql_request(operation, None).await?;

        match response.task_secrets {
            TaskSecretsResult::TaskSecretsOutput(output) => {
                let mut secrets = HashMap::new();
                for entry in output.secrets {
                    secrets.insert(entry.name, entry.value);
                }
                Ok(secrets)
            }
            TaskSecretsResult::UserFacingError(error) => {
                Err(anyhow!(get_user_facing_error_message(error)))
            }
            TaskSecretsResult::Unknown => Err(anyhow!("Unknown error while getting task secrets")),
        }
    }

    async fn issue_task_identity_token(
        &self,
        options: galaxy_managed_secrets::client::IdentityTokenOptions,
    ) -> Result<TaskIdentityToken> {
        let requested_duration_seconds = options
            .requested_duration
            .as_secs()
            .try_into()
            .context("Requested duration out of bounds")?;
        let variables = IssueTaskIdentityTokenVariables {
            input: IssueTaskIdentityTokenInput {
                audience: options.audience,
                requested_duration_seconds,
                subject_template: Some(options.subject_template.into_vec()),
            },
            request_context: get_request_context(),
        };
        let operation = IssueTaskIdentityToken::build(variables);
        let response = self.send_graphql_request(operation, None).await?;

        match response.issue_task_identity_token {
            IssueTaskIdentityTokenResult::IssueTaskIdentityTokenOutput(output) => {
                Ok(TaskIdentityToken {
                    token: output.token,
                    expires_at: output.expires_at.utc(),
                    issuer: output.issuer,
                })
            }
            IssueTaskIdentityTokenResult::UserFacingError(error) => {
                Err(anyhow!(get_user_facing_error_message(error)))
            }
            IssueTaskIdentityTokenResult::Unknown => {
                Err(anyhow!("Unknown error while issuing task identity token"))
            }
        }
    }
}