//! 账号管理 HTTP 处理器

use axum::{
    extract::{Extension, Path, Query, State},
    Json,
};
use crate::state::AppState;
use crate::error::SaasResult;
use crate::auth::types::AuthContext;
use crate::auth::handlers::{log_operation, check_permission};
use super::{types::*, service};

fn require_admin(ctx: &AuthContext) -> SaasResult<()> {
    check_permission(ctx, "account:admin")
}

/// GET /api/v1/accounts (admin only)
pub async fn list_accounts(
    State(state): State<AppState>,
    Query(query): Query<ListAccountsQuery>,
    Extension(ctx): Extension<AuthContext>,
) -> SaasResult<Json<PaginatedResponse<serde_json::Value>>> {
    require_admin(&ctx)?;
    service::list_accounts(&state.db, &query).await.map(Json)
}

/// GET /api/v1/accounts/:id
pub async fn get_account(
    State(state): State<AppState>,
    Path(id): Path<String>,
    Extension(ctx): Extension<AuthContext>,
) -> SaasResult<Json<serde_json::Value>> {
    // 只能查看自己，或 admin 查看任何人
    if id != ctx.account_id {
        require_admin(&ctx)?;
    }
    service::get_account(&state.db, &id).await.map(Json)
}

/// PUT /api/v1/accounts/:id (admin or self for limited fields)
pub async fn update_account(
    State(state): State<AppState>,
    Path(id): Path<String>,
    Extension(ctx): Extension<AuthContext>,
    Json(req): Json<UpdateAccountRequest>,
) -> SaasResult<Json<serde_json::Value>> {
    // 非管理员只能修改自己的资料
    if id != ctx.account_id {
        require_admin(&ctx)?;
    }
    let result = service::update_account(&state.db, &id, &req).await?;
    log_operation(&state.db, &ctx.account_id, "account.update", "account", &id, None, None).await?;
    Ok(Json(result))
}

/// PATCH /api/v1/accounts/:id/status (admin only)
pub async fn update_status(
    State(state): State<AppState>,
    Path(id): Path<String>,
    Extension(ctx): Extension<AuthContext>,
    Json(req): Json<UpdateStatusRequest>,
) -> SaasResult<Json<serde_json::Value>> {
    require_admin(&ctx)?;
    service::update_account_status(&state.db, &id, &req.status).await?;
    log_operation(&state.db, &ctx.account_id, "account.update_status", "account", &id,
        Some(serde_json::json!({"status": &req.status})), None).await?;
    Ok(Json(serde_json::json!({"ok": true})))
}

/// GET /api/v1/tokens
pub async fn list_tokens(
    State(state): State<AppState>,
    Extension(ctx): Extension<AuthContext>,
) -> SaasResult<Json<Vec<TokenInfo>>> {
    service::list_api_tokens(&state.db, &ctx.account_id).await.map(Json)
}

/// POST /api/v1/tokens
pub async fn create_token(
    State(state): State<AppState>,
    Extension(ctx): Extension<AuthContext>,
    Json(req): Json<CreateTokenRequest>,
) -> SaasResult<Json<TokenInfo>> {
    let token = service::create_api_token(&state.db, &ctx.account_id, &req).await?;
    log_operation(&state.db, &ctx.account_id, "token.create", "api_token", &token.id,
        Some(serde_json::json!({"name": &req.name})), None).await?;
    Ok(Json(token))
}

/// DELETE /api/v1/tokens/:id
pub async fn revoke_token(
    State(state): State<AppState>,
    Path(id): Path<String>,
    Extension(ctx): Extension<AuthContext>,
) -> SaasResult<Json<serde_json::Value>> {
    service::revoke_api_token(&state.db, &id, &ctx.account_id).await?;
    log_operation(&state.db, &ctx.account_id, "token.revoke", "api_token", &id, None, None).await?;
    Ok(Json(serde_json::json!({"ok": true})))
}

/// GET /api/v1/logs/operations (admin only)
pub async fn list_operation_logs(
    State(state): State<AppState>,
    Query(params): Query<std::collections::HashMap<String, String>>,
    Extension(ctx): Extension<AuthContext>,
) -> SaasResult<Json<Vec<serde_json::Value>>> {
    require_admin(&ctx)?;
    let page: i64 = params.get("page").and_then(|v| v.parse().ok()).unwrap_or(1);
    let page_size: i64 = params.get("page_size").and_then(|v| v.parse().ok()).unwrap_or(50);
    let offset = (page - 1) * page_size;

    let rows: Vec<(i64, Option<String>, String, Option<String>, Option<String>, Option<String>, Option<String>, String)> =
        sqlx::query_as(
            "SELECT id, account_id, action, target_type, target_id, details, ip_address, created_at
             FROM operation_logs ORDER BY created_at DESC LIMIT ?1 OFFSET ?2"
        )
        .bind(page_size)
        .bind(offset)
        .fetch_all(&state.db)
        .await?;

    let items: Vec<serde_json::Value> = rows.into_iter().map(|(id, account_id, action, target_type, target_id, details, ip_address, created_at)| {
        serde_json::json!({
            "id": id, "account_id": account_id, "action": action,
            "target_type": target_type, "target_id": target_id,
            "details": details.and_then(|d| serde_json::from_str::<serde_json::Value>(&d).ok()),
            "ip_address": ip_address, "created_at": created_at,
        })
    }).collect();

    Ok(Json(items))
}

/// GET /api/v1/stats/dashboard — 仪表盘聚合统计 (需要 admin 权限)
pub async fn dashboard_stats(
    State(state): State<AppState>,
    Extension(ctx): Extension<AuthContext>,
) -> SaasResult<Json<serde_json::Value>> {
    require_admin(&ctx)?;

    let total_accounts: (i64,) = sqlx::query_as("SELECT COUNT(*) FROM accounts")
        .fetch_one(&state.db).await?;
    let active_accounts: (i64,) = sqlx::query_as("SELECT COUNT(*) FROM accounts WHERE status = 'active'")
        .fetch_one(&state.db).await?;
    let tasks_today: (i64,) = sqlx::query_as(
        "SELECT COUNT(*) FROM relay_tasks WHERE date(created_at) = date('now')"
    ).fetch_one(&state.db).await?;
    let active_providers: (i64,) = sqlx::query_as("SELECT COUNT(*) FROM providers WHERE enabled = 1")
        .fetch_one(&state.db).await?;
    let active_models: (i64,) = sqlx::query_as("SELECT COUNT(*) FROM models WHERE enabled = 1")
        .fetch_one(&state.db).await?;
    let tokens_today_input: (i64,) = sqlx::query_as(
        "SELECT COALESCE(SUM(input_tokens), 0) FROM usage_records WHERE date(created_at) = date('now')"
    ).fetch_one(&state.db).await?;
    let tokens_today_output: (i64,) = sqlx::query_as(
        "SELECT COALESCE(SUM(output_tokens), 0) FROM usage_records WHERE date(created_at) = date('now')"
    ).fetch_one(&state.db).await?;

    Ok(Json(serde_json::json!({
        "total_accounts": total_accounts.0,
        "active_accounts": active_accounts.0,
        "tasks_today": tasks_today.0,
        "active_providers": active_providers.0,
        "active_models": active_models.0,
        "tokens_today_input": tokens_today_input.0,
        "tokens_today_output": tokens_today_output.0,
    })))
}