use async_trait::async_trait;
use loco_rs::{
    app::{AppContext, Initializer},
    Result,
};
use sea_orm::{ActiveModelTrait, EntityTrait, IntoActiveModel, QueryOrder, Set};
use std::path::{Path, PathBuf};

use crate::models::_entities::{comments, posts, site_settings};
use crate::services::content;

const FIXTURES_DIR: &str = "src/fixtures";

pub struct ContentSyncInitializer;

#[async_trait]
impl Initializer for ContentSyncInitializer {
    fn name(&self) -> String {
        "content-sync".to_string()
    }

    async fn before_run(&self, app_context: &AppContext) -> Result<()> {
        sync_content(app_context, Path::new(FIXTURES_DIR)).await
    }
}

async fn sync_content(ctx: &AppContext, base: &Path) -> Result<()> {
    content::sync_markdown_posts(ctx).await?;
    sync_site_settings(ctx, base).await?;
    sync_comment_post_slugs(ctx, base).await?;
    Ok(())
}

fn read_fixture_rows(base: &Path, file_name: &str) -> Vec<serde_json::Value> {
    let path: PathBuf = base.join(file_name);
    let seed_data = match std::fs::read_to_string(path) {
        Ok(data) => data,
        Err(_) => return vec![],
    };

    serde_yaml::from_str(&seed_data).unwrap_or_default()
}

fn as_optional_string(value: &serde_json::Value) -> Option<String> {
    value.as_str().and_then(|item| {
        let trimmed = item.trim();
        if trimmed.is_empty() {
            None
        } else {
            Some(trimmed.to_string())
        }
    })
}

fn is_blank(value: &Option<String>) -> bool {
    value.as_deref().map(str::trim).unwrap_or("").is_empty()
}

async fn sync_site_settings(ctx: &AppContext, base: &Path) -> Result<()> {
    let rows = read_fixture_rows(base, "site_settings.yaml");
    let Some(seed) = rows.first() else {
        return Ok(());
    };

    let tech_stack = seed["tech_stack"]
        .as_array()
        .map(|items| {
            items
                .iter()
                .filter_map(|item| item.as_str())
                .map(ToString::to_string)
                .collect::<Vec<_>>()
        })
        .filter(|items| !items.is_empty())
        .map(|items| serde_json::json!(items));

    let existing = site_settings::Entity::find()
        .order_by_asc(site_settings::Column::Id)
        .one(&ctx.db)
        .await?;

    if let Some(existing) = existing {
        let mut model = existing.clone().into_active_model();

        if is_blank(&existing.site_name) {
            model.site_name = Set(as_optional_string(&seed["site_name"]));
        }
        if is_blank(&existing.site_short_name) {
            model.site_short_name = Set(as_optional_string(&seed["site_short_name"]));
        }
        if is_blank(&existing.site_url) {
            model.site_url = Set(as_optional_string(&seed["site_url"]));
        }
        if is_blank(&existing.site_title) {
            model.site_title = Set(as_optional_string(&seed["site_title"]));
        }
        if is_blank(&existing.site_description) {
            model.site_description = Set(as_optional_string(&seed["site_description"]));
        }
        if is_blank(&existing.hero_title) {
            model.hero_title = Set(as_optional_string(&seed["hero_title"]));
        }
        if is_blank(&existing.hero_subtitle) {
            model.hero_subtitle = Set(as_optional_string(&seed["hero_subtitle"]));
        }
        if is_blank(&existing.owner_name) {
            model.owner_name = Set(as_optional_string(&seed["owner_name"]));
        }
        if is_blank(&existing.owner_title) {
            model.owner_title = Set(as_optional_string(&seed["owner_title"]));
        }
        if is_blank(&existing.owner_bio) {
            model.owner_bio = Set(as_optional_string(&seed["owner_bio"]));
        }
        if is_blank(&existing.owner_avatar_url) {
            model.owner_avatar_url = Set(as_optional_string(&seed["owner_avatar_url"]));
        }
        if is_blank(&existing.social_github) {
            model.social_github = Set(as_optional_string(&seed["social_github"]));
        }
        if is_blank(&existing.social_twitter) {
            model.social_twitter = Set(as_optional_string(&seed["social_twitter"]));
        }
        if is_blank(&existing.social_email) {
            model.social_email = Set(as_optional_string(&seed["social_email"]));
        }
        if is_blank(&existing.location) {
            model.location = Set(as_optional_string(&seed["location"]));
        }
        if existing.tech_stack.is_none() {
            model.tech_stack = Set(tech_stack);
        }

        let _ = model.update(&ctx.db).await;
        return Ok(());
    }

    let model = site_settings::ActiveModel {
        id: Set(seed["id"].as_i64().unwrap_or(1) as i32),
        site_name: Set(as_optional_string(&seed["site_name"])),
        site_short_name: Set(as_optional_string(&seed["site_short_name"])),
        site_url: Set(as_optional_string(&seed["site_url"])),
        site_title: Set(as_optional_string(&seed["site_title"])),
        site_description: Set(as_optional_string(&seed["site_description"])),
        hero_title: Set(as_optional_string(&seed["hero_title"])),
        hero_subtitle: Set(as_optional_string(&seed["hero_subtitle"])),
        owner_name: Set(as_optional_string(&seed["owner_name"])),
        owner_title: Set(as_optional_string(&seed["owner_title"])),
        owner_bio: Set(as_optional_string(&seed["owner_bio"])),
        owner_avatar_url: Set(as_optional_string(&seed["owner_avatar_url"])),
        social_github: Set(as_optional_string(&seed["social_github"])),
        social_twitter: Set(as_optional_string(&seed["social_twitter"])),
        social_email: Set(as_optional_string(&seed["social_email"])),
        location: Set(as_optional_string(&seed["location"])),
        tech_stack: Set(tech_stack),
        ..Default::default()
    };

    let _ = model.insert(&ctx.db).await;
    Ok(())
}

async fn sync_comment_post_slugs(ctx: &AppContext, base: &Path) -> Result<()> {
    let rows = read_fixture_rows(base, "comments.yaml");

    for seed in rows {
        let id = seed["id"].as_i64().unwrap_or(0) as i32;
        let pid = seed["pid"].as_i64().unwrap_or(0) as i32;
        if id == 0 || pid == 0 {
            continue;
        }

        let Some(existing) = comments::Entity::find_by_id(id).one(&ctx.db).await? else {
            continue;
        };

        if existing.post_slug.is_some() {
            continue;
        }

        let Some(post) = posts::Entity::find_by_id(pid).one(&ctx.db).await? else {
            continue;
        };

        let mut model = existing.into_active_model();
        model.post_slug = Set(Some(post.slug));
        let _ = model.update(&ctx.db).await;
    }

    Ok(())
}