// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.

use std::path::PathBuf;

use crate::{
    cli::Cli,
    version_utils::{is_before, pad_major, pad_major_minor, pad_major_minor_patch},
    LaunchableApp, NimbusApp,
};
use anyhow::{bail, Result};

impl TryFrom<&Cli> for LaunchableApp {
    type Error = anyhow::Error;
    fn try_from(value: &Cli) -> Result<Self> {
        Self::try_from_app_channel_device(
            value.app.as_deref(),
            value.channel.as_deref(),
            value.device_id.as_deref(),
        )
    }
}

impl LaunchableApp {
    pub(crate) fn try_from_app_channel_device(
        app: Option<&str>,
        channel: Option<&str>,
        device_id: Option<&str>,
    ) -> Result<Self> {
        match (&app, &channel) {
            (None, None) => anyhow::bail!("A value for --app and --channel must be specified. Supported apps are: fenix, focus_android, firefox_ios and focus_ios"),
            (None, _) => anyhow::bail!("A value for --app must be specified. One of: fenix, focus_android, firefox_ios and focus_ios are currently supported"),
            (_, None) => anyhow::bail!("A value for --channel must be specified. Supported channels are: developer, nightly, beta and release"),
            _ => (),
        }

        let app = app.unwrap();
        let channel = channel.unwrap();

        let prefix = match app {
            "fenix" => Some("org.mozilla"),
            "focus_android" => Some("org.mozilla"),
            "firefox_ios" => Some("org.mozilla.ios"),
            "focus_ios" => Some("org.mozilla.ios"),
            _ => anyhow::bail!("Only --app values of fenix, focus_android, firefox_ios and focus_ios are currently supported"),
        };

        let suffix = match app {
            "fenix" => Some(match channel {
                "developer" => "fenix.debug",
                "nightly" => "fenix",
                "beta" => "firefox_beta",
                "release" => "firefox",
                _ => bail!(format!("Application {} has no channel '{}'. Try one of developer, nightly, beta or release", app, channel)),
            }),
            "focus_android" => Some(match channel {
                "developer" => "focus.debug",
                "nightly" => "focus.nightly",
                "beta" => "focus.beta",
                "release" => "focus",
                _ => bail!(format!("Application {} has no channel '{}'. Try one of developer, nightly, beta or release", app, channel)),
            }),
            "firefox_ios" => Some(match channel {
                "developer" => "Fennec",
                "beta" => "FirefoxBeta",
                "release" => "Firefox",
                _ => bail!(format!("Application {} has no channel '{}'. Try one of developer, beta or release", app, channel)),
            }),
            "focus_ios" => Some(match channel {
                "developer" => "Focus",
                "beta" => "Focus",
                "release" => "Focus",
                _ => bail!(format!("Application {} has no channel '{}'. Try one of developer, beta or release", app, channel)),
            }),
            _ => None,
        };

        // Scheme for deeplinks.
        let scheme = match app {
            "fenix" => Some(match channel {
                // Firefox for Android defines per channel deeplink schemes in the app/build.gradle.
                // e.g. https://github.com/mozilla-mobile/firefox-android/blob/5d18e7ffe2f3e4505ea815d584d20e66ad10f515/fenix/app/build.gradle#L154
                "developer" => "fenix-dev",
                "nightly" => "fenix-nightly",
                "beta" => "fenix-beta",
                "release" => "fenix",
                _ => unreachable!(),
            }),
            "firefox_ios" => Some(match channel {
                // Firefox for iOS uses MOZ_PUBLIC_URL_SCHEME, which is always
                // [`firefox`](https://github.com/mozilla-mobile/firefox-ios/blob/f1acc8a2232a736e65e235b811372ddbf3e802f8/Client/Configuration/Common.xcconfig#L24)
                // and MOZ_INTERNAL_URL_SCHEME which is different per channel.
                // e.g. https://github.com/mozilla-mobile/firefox-ios/blob/f1acc8a2232a736e65e235b811372ddbf3e802f8/Client/Configuration/Firefox.xcconfig#L12
                // From inspection of the code, there are no different uses for the internal vs
                // public, so very useful for launching the specific app on a phone where you
                // have multiple versions installed.
                "developer" => "fennec",
                "beta" => "firefox-beta",
                "release" => "firefox-internal",
                _ => unreachable!(),
            }),
            // Focus for iOS has two, firefox-focus and firefox-klar
            // It's not clear if Focus's channels are configured for this
            "focus_ios" => Some("firefox-focus"),

            // Focus for Android provides no deeplinks.
            _ => None,
        }
        .map(str::to_string);

        Ok(match (app, prefix, suffix) {
            ("fenix", Some(prefix), Some(suffix)) => Self::Android {
                package_name: format!("{}.{}", prefix, suffix),
                activity_name: ".App".to_string(),
                device_id: device_id.map(str::to_string),
                scheme,
                open_deeplink: Some("open".to_string()),
            },
            ("focus_android", Some(prefix), Some(suffix)) => Self::Android {
                package_name: format!("{}.{}", prefix, suffix),
                activity_name: "org.mozilla.focus.activity.MainActivity".to_string(),
                device_id: device_id.map(str::to_string),
                scheme,
                open_deeplink: None,
            },
            ("firefox_ios", Some(prefix), Some(suffix)) => Self::Ios {
                app_id: format!("{}.{}", prefix, suffix),
                device_id: device_id.unwrap_or("booted").to_string(),
                scheme,
            },
            ("focus_ios", Some(prefix), Some(suffix)) => Self::Ios {
                app_id: format!("{}.{}", prefix, suffix),
                device_id: device_id.unwrap_or("booted").to_string(),
                scheme,
            },
            _ => unreachable!(),
        })
    }
}

impl NimbusApp {
    pub(crate) fn ref_from_version(
        &self,
        version: &Option<String>,
        ref_: &String,
    ) -> Result<String> {
        let app_name = self
            .app_name()
            .ok_or_else(|| anyhow::anyhow!("Either an --app or a --manifest must be specified"))?;

        if version.is_none() {
            return Ok(ref_.to_string());
        }

        let v = version.as_ref().unwrap();
        let v = match app_name.as_str() {
            "fenix" => {
                if is_before(version, 111) {
                    pad_major_minor_patch(v)
                } else if is_before(version, 126) {
                    pad_major(v)
                } else {
                    bail!("mozilla-firefox does not have tagged versions, use --ref instead")
                }
            }
            "focus_android" => {
                if is_before(version, 110) {
                    pad_major_minor(v)
                } else if is_before(version, 126) {
                    pad_major(v)
                } else {
                    bail!("mozilla-firefox does not have tagged versions, use --ref instead")
                }
            }
            "firefox_ios" => {
                if is_before(version, 112) {
                    pad_major_minor(v)
                } else {
                    pad_major(v)
                }
            }
            "focus_ios" => pad_major(v),
            _ => v.to_string(),
        };

        Ok(match app_name.as_str() {
            "fenix" => format!("releases_v{v}"),
            "focus_android" => format!("releases_v{v}"),
            "firefox_ios" => {
                if is_before(version, 106) {
                    format!("v{v}")
                } else {
                    format!("release/v{v}")
                }
            }
            "focus_ios" => format!("releases_v{v}"),

            _ => anyhow::bail!("{} is not defined", app_name),
        })
    }

    pub(crate) fn github_repo<'a>(&self, version: &Option<String>) -> Result<&'a str> {
        let app_name = self
            .app_name()
            .ok_or_else(|| anyhow::anyhow!("Either an --app or a --manifest must be specified"))?;
        Ok(match app_name.as_str() {
            // Fenix and Focus are both in the same repo
            "fenix" => {
                if is_before(version, 111) {
                    "mozilla-mobile/fenix"
                } else if is_before(version, 126) {
                    "mozilla-mobile/firefox-android"
                } else {
                    "mozilla-firefox/firefox"
                }
            }
            "focus_android" => {
                if is_before(version, 110) {
                    "mozilla-mobile/focus-android"
                } else if is_before(version, 126) {
                    "mozilla-mobile/firefox-android"
                } else {
                    "mozilla-firefox/firefox"
                }
            }
            "firefox_ios" => "mozilla-mobile/firefox-ios",
            "focus_ios" => "mozilla-mobile/focus-ios",
            _ => unreachable!("{} is not defined", app_name),
        })
    }

    pub(crate) fn manifest_location<'a>(&self, version: &Option<String>) -> Result<&'a str> {
        let app_name = self
            .app_name()
            .ok_or_else(|| anyhow::anyhow!("Either an --app or a --manifest must be specified"))?;
        Ok(match app_name.as_str() {
            "fenix" => {
                if is_before(version, 98) {
                    bail!("Fenix wasn't Nimbus enabled before v98")
                } else if is_before(version, 111) {
                    "nimbus.fml.yaml"
                } else if is_before(version, 112) {
                    "fenix/nimbus.fml.yaml"
                } else if is_before(version, 126) {
                    "fenix/app/nimbus.fml.yaml"
                } else {
                    "mobile/android/fenix/app/nimbus.fml.yaml"
                }
            }
            "focus_android" => {
                if is_before(version, 102) {
                    bail!("Focus for Android wasn't Nimbus enabled before v102")
                } else if is_before(version, 110) {
                    "nimbus.fml.yaml"
                } else if is_before(version, 112) {
                    "focus-android/nimbus.fml.yaml"
                } else if is_before(version, 126) {
                    "focus-android/app/nimbus.fml.yaml"
                } else {
                    "mobile/android/focus-android/app/nimbus.fml.yaml"
                }
            }
            "firefox_ios" => {
                if is_before(version, 98) {
                    bail!("Firefox for iOS wasn't Nimbus enabled before v98")
                } else if is_before(version, 122) {
                    "nimbus.fml.yaml"
                } else {
                    "firefox-ios/nimbus.fml.yaml"
                }
            }
            "focus_ios" => {
                if is_before(version, 108) {
                    bail!("Focus wasn't Nimbus enabled before v108")
                } else if is_before(version, 122) {
                    "nimbus.fml.yaml"
                } else {
                    "focus-ios/nimbus.fml.yaml"
                }
            }
            _ => anyhow::bail!("{} is not defined", app_name),
        })
    }
}

pub(crate) fn rs_production_server() -> String {
    std::env::var("NIMBUS_URL")
        .unwrap_or_else(|_| "https://firefox.settings.services.mozilla.com".to_string())
}

pub(crate) fn rs_stage_server() -> String {
    std::env::var("NIMBUS_URL_STAGE")
        .unwrap_or_else(|_| "https://firefox.settings.services.allizom.org".to_string())
}

pub(crate) fn api_v6_production_server() -> String {
    std::env::var("NIMBUS_API_URL")
        .unwrap_or_else(|_| "https://experimenter.services.mozilla.com".to_string())
}

pub(crate) fn api_v6_stage_server() -> String {
    std::env::var("NIMBUS_API_URL_STAGE")
        .unwrap_or_else(|_| "https://stage.experimenter.nonprod.webservices.mozgcp.net".to_string())
}

pub(crate) fn manifest_cache_dir() -> Option<PathBuf> {
    match std::env::var("NIMBUS_MANIFEST_CACHE") {
        Ok(s) => {
            let cwd = std::env::current_dir().expect("Current Working Directory is not set");
            Some(cwd.join(s))
        }
        // We let the Nimbus FML define its own cache.
        _ => None,
    }
}

#[cfg(feature = "server")]
pub(crate) fn server_port() -> String {
    match std::env::var("NIMBUS_CLI_SERVER_PORT") {
        Ok(s) => s,
        _ => "8080".to_string(),
    }
}

#[cfg(feature = "server")]
pub(crate) fn server_host() -> String {
    match std::env::var("NIMBUS_CLI_SERVER_HOST") {
        Ok(s) => s,
        _ => {
            use local_ip_address::local_ip;
            let ip = local_ip().unwrap();
            ip.to_string()
        }
    }
}