use chrono::{DateTime, Utc};
use serde::{Deserialize, Serialize};

use super::media::MediaResponse;

#[derive(Debug, Deserialize, utoipa::ToSchema)]
pub struct RegisterDeviceRequest {
  pub name:           String,
  pub device_type:    String,
  pub client_version: String,
  pub os_info:        Option<String>,
}

#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct DeviceResponse {
  pub id:             String,
  pub name:           String,
  pub device_type:    String,
  pub client_version: String,
  pub os_info:        Option<String>,
  pub last_sync_at:   Option<DateTime<Utc>>,
  pub last_seen_at:   DateTime<Utc>,
  pub sync_cursor:    Option<i64>,
  pub enabled:        bool,
  pub created_at:     DateTime<Utc>,
}

impl From<pinakes_core::sync::SyncDevice> for DeviceResponse {
  fn from(d: pinakes_core::sync::SyncDevice) -> Self {
    Self {
      id:             d.id.0.to_string(),
      name:           d.name,
      device_type:    d.device_type.to_string(),
      client_version: d.client_version,
      os_info:        d.os_info,
      last_sync_at:   d.last_sync_at,
      last_seen_at:   d.last_seen_at,
      sync_cursor:    d.sync_cursor,
      enabled:        d.enabled,
      created_at:     d.created_at,
    }
  }
}

#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct DeviceRegistrationResponse {
  pub device:       DeviceResponse,
  pub device_token: String,
}

#[derive(Debug, Deserialize, utoipa::ToSchema)]
pub struct UpdateDeviceRequest {
  pub name:    Option<String>,
  pub enabled: Option<bool>,
}

#[derive(Debug, Deserialize, utoipa::ToSchema)]
pub struct GetChangesParams {
  pub cursor: Option<i64>,
  pub limit:  Option<u64>,
}

#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct SyncChangeResponse {
  pub id:           String,
  pub sequence:     i64,
  pub change_type:  String,
  pub media_id:     Option<String>,
  pub path:         String,
  pub content_hash: Option<String>,
  pub file_size:    Option<u64>,
  pub timestamp:    DateTime<Utc>,
}

impl From<pinakes_core::sync::SyncLogEntry> for SyncChangeResponse {
  fn from(e: pinakes_core::sync::SyncLogEntry) -> Self {
    Self {
      id:           e.id.to_string(),
      sequence:     e.sequence,
      change_type:  e.change_type.to_string(),
      media_id:     e.media_id.map(|id| id.0.to_string()),
      path:         e.path,
      content_hash: e.content_hash.map(|h| h.0),
      file_size:    e.file_size,
      timestamp:    e.timestamp,
    }
  }
}

#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct ChangesResponse {
  pub changes:  Vec<SyncChangeResponse>,
  pub cursor:   i64,
  pub has_more: bool,
}

#[derive(Debug, Deserialize, utoipa::ToSchema)]
pub struct ClientChangeReport {
  pub path:         String,
  pub change_type:  String,
  pub content_hash: Option<String>,
  pub file_size:    Option<u64>,
  pub local_mtime:  Option<i64>,
}

#[derive(Debug, Deserialize, utoipa::ToSchema)]
pub struct ReportChangesRequest {
  pub changes: Vec<ClientChangeReport>,
}

#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct ReportChangesResponse {
  pub accepted:        Vec<String>,
  pub conflicts:       Vec<ConflictResponse>,
  pub upload_required: Vec<String>,
}

#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct ConflictResponse {
  pub id:          String,
  pub path:        String,
  pub local_hash:  String,
  pub server_hash: String,
  pub detected_at: DateTime<Utc>,
}

impl From<pinakes_core::sync::SyncConflict> for ConflictResponse {
  fn from(c: pinakes_core::sync::SyncConflict) -> Self {
    Self {
      id:          c.id.to_string(),
      path:        c.path,
      local_hash:  c.local_hash,
      server_hash: c.server_hash,
      detected_at: c.detected_at,
    }
  }
}

#[derive(Debug, Deserialize, utoipa::ToSchema)]
pub struct ResolveConflictRequest {
  pub resolution: String,
}

#[derive(Debug, Deserialize, utoipa::ToSchema)]
pub struct CreateUploadSessionRequest {
  pub target_path:   String,
  pub expected_hash: String,
  pub expected_size: u64,
  pub chunk_size:    Option<u64>,
}

#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct UploadSessionResponse {
  pub id:            String,
  pub target_path:   String,
  pub expected_hash: String,
  pub expected_size: u64,
  pub chunk_size:    u64,
  pub chunk_count:   u64,
  pub status:        String,
  pub created_at:    DateTime<Utc>,
  pub expires_at:    DateTime<Utc>,
}

impl From<pinakes_core::sync::UploadSession> for UploadSessionResponse {
  fn from(s: pinakes_core::sync::UploadSession) -> Self {
    Self {
      id:            s.id.to_string(),
      target_path:   s.target_path,
      expected_hash: s.expected_hash.0,
      expected_size: s.expected_size,
      chunk_size:    s.chunk_size,
      chunk_count:   s.chunk_count,
      status:        s.status.to_string(),
      created_at:    s.created_at,
      expires_at:    s.expires_at,
    }
  }
}

#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct ChunkUploadedResponse {
  pub chunk_index: u64,
  pub received:    bool,
}

#[derive(Debug, Deserialize, utoipa::ToSchema)]
pub struct AcknowledgeChangesRequest {
  pub cursor: i64,
}

// Most viewed (uses MediaResponse)
#[derive(Debug, Serialize, utoipa::ToSchema)]
pub struct MostViewedResponse {
  pub media:      MediaResponse,
  pub view_count: u64,
}