use clap::Subcommand;
use cuddle_please_frontend::PleaseConfig;
use cuddle_please_misc::{get_most_significant_version, DynRemoteGitClient, DynUi, GiteaClient};

#[derive(Subcommand, Debug, Clone)]
pub enum GiteaCommand {
    Connect {},
    Tags {
        #[command(subcommand)]
        command: Option<GiteaTagsCommand>,
    },
    SinceCommit {
        #[arg(long)]
        sha: String,

        #[arg(long)]
        branch: String,
    },
    CheckPr {},
}

#[derive(Subcommand, Debug, Clone)]
pub enum GiteaTagsCommand {
    MostSignificant {},
}

pub struct GiteaCommandHandler {
    ui: DynUi,
    config: PleaseConfig,
    gitea_client: DynRemoteGitClient,
}

impl GiteaCommandHandler {
    pub fn new(ui: DynUi, config: PleaseConfig, gitea_client: DynRemoteGitClient) -> Self {
        Self {
            ui,
            config,
            gitea_client,
        }
    }

    pub fn execute(&self, command: &GiteaCommand, token: &str) -> anyhow::Result<()> {
        let owner = self.config.get_owner();
        let repository = self.config.get_repository();

        match command {
            GiteaCommand::Connect {} => {
                self.gitea_client.connect(owner, repository)?;
                self.ui.write_str_ln("connected succesfully go gitea");
            }
            GiteaCommand::Tags { command } => match command {
                Some(GiteaTagsCommand::MostSignificant {}) => {
                    let tags = self.gitea_client.get_tags(owner, repository)?;

                    match get_most_significant_version(tags.iter().collect()) {
                        Some(tag) => {
                            self.ui.write_str_ln(&format!(
                                "found most significant tags: {}",
                                tag.name
                            ));
                        }
                        None => {
                            self.ui.write_str_ln("found no tags with versioning schema");
                        }
                    }
                }
                None => {
                    let tags = self.gitea_client.get_tags(owner, repository)?;
                    self.ui.write_str_ln("got tags from gitea");
                    for tag in tags {
                        self.ui.write_str_ln(&format!("- {}", tag.name))
                    }
                }
            },
            GiteaCommand::SinceCommit { sha, branch } => {
                let commits =
                    self.gitea_client
                        .get_commits_since(owner, repository, Some(sha), branch)?;
                self.ui.write_str_ln("got commits from gitea");
                for commit in commits {
                    self.ui.write_str_ln(&format!("- {}", commit.get_title()))
                }
            }
            GiteaCommand::CheckPr {} => {
                let pr = self.gitea_client.get_pull_request(owner, repository)?;

                match pr {
                    Some(index) => {
                        self.ui.write_str_ln(&format!(
                            "found cuddle-please (index={}) pr from gitea",
                            index
                        ));
                    }
                    None => {
                        self.ui.write_str_ln("found no cuddle-please pr from gitea");
                    }
                }
            }
        }
        Ok(())
    }
}