use std::collections::BTreeMap;

use aether_contracts::{ExecutionPlan, RequestBody};
use aether_data_contracts::repository::video_tasks::{
    StoredVideoTask, UpsertVideoTask, VideoTaskStatus,
};
use serde_json::{json, Map, Value};

use crate::{
    build_video_follow_up_report_context, current_unix_timestamp_secs, map_openai_task_status,
    parse_video_content_variant, request_body_string, request_body_u32, resolve_follow_up_auth,
    LocalVideoTaskContentAction, LocalVideoTaskFollowUpPlan, LocalVideoTaskReadResponse,
    LocalVideoTaskSnapshot, LocalVideoTaskStatus, OpenAiVideoTaskSeed,
    VideoFollowUpReportContextInput, DEFAULT_VIDEO_TASK_MAX_POLL_COUNT,
    DEFAULT_VIDEO_TASK_POLL_INTERVAL_SECONDS,
};

pub fn map_openai_stored_task_to_read_response(
    task: StoredVideoTask,
) -> LocalVideoTaskReadResponse {
    match task.status {
        VideoTaskStatus::Cancelled => LocalVideoTaskReadResponse {
            status_code: 404,
            body_json: json!({"detail": "Video task was cancelled"}),
        },
        VideoTaskStatus::Deleted => LocalVideoTaskReadResponse {
            status_code: 404,
            body_json: json!({"detail": "Video task not found"}),
        },
        status => LocalVideoTaskReadResponse {
            status_code: 200,
            body_json: build_openai_stored_task_body(task, status),
        },
    }
}

fn build_openai_stored_task_body(task: StoredVideoTask, status: VideoTaskStatus) -> Value {
    let mut body = json!({
        "id": task.id,
        "object": "video",
        "status": map_openai_stored_task_status(status),
        "progress": task.progress_percent,
        "created_at": task.created_at_unix_ms,
    });

    if let Some(model) = task.model {
        body["model"] = Value::String(model);
    }
    if let Some(prompt) = task.prompt {
        body["prompt"] = Value::String(prompt);
    }
    if let Some(size) = task.size {
        body["size"] = Value::String(size);
    }
    if let Some(video_url) = task.video_url {
        body["video_url"] = Value::String(video_url);
    }
    if let Some(completed_at) = task.completed_at_unix_secs {
        body["completed_at"] = Value::Number(completed_at.into());
    }
    if matches!(
        status,
        VideoTaskStatus::Failed | VideoTaskStatus::Expired | VideoTaskStatus::Cancelled
    ) {
        body["error"] = json!({
            "code": task.error_code.unwrap_or_else(|| "unknown".to_string()),
            "message": task
                .error_message
                .unwrap_or_else(|| "Video generation failed".to_string()),
        });
    }

    body
}

fn map_openai_stored_task_status(status: VideoTaskStatus) -> &'static str {
    match status {
        VideoTaskStatus::Pending | VideoTaskStatus::Submitted | VideoTaskStatus::Queued => "queued",
        VideoTaskStatus::Processing => "processing",
        VideoTaskStatus::Completed => "completed",
        VideoTaskStatus::Failed | VideoTaskStatus::Cancelled | VideoTaskStatus::Expired => "failed",
        VideoTaskStatus::Deleted => "deleted",
    }
}

impl OpenAiVideoTaskSeed {
    pub fn apply_provider_body(&mut self, provider_body: &Map<String, Value>) {
        let raw_status = provider_body
            .get("status")
            .and_then(Value::as_str)
            .map(str::trim)
            .unwrap_or_default();
        self.status = match raw_status {
            "queued" => LocalVideoTaskStatus::Queued,
            "processing" => LocalVideoTaskStatus::Processing,
            "completed" => LocalVideoTaskStatus::Completed,
            "failed" => LocalVideoTaskStatus::Failed,
            "cancelled" => LocalVideoTaskStatus::Cancelled,
            "expired" => LocalVideoTaskStatus::Expired,
            _ => LocalVideoTaskStatus::Submitted,
        };
        self.progress_percent = provider_body
            .get("progress")
            .and_then(Value::as_u64)
            .and_then(|value| u16::try_from(value).ok())
            .unwrap_or(match self.status {
                LocalVideoTaskStatus::Completed => 100,
                LocalVideoTaskStatus::Processing => 50,
                _ => self.progress_percent,
            });
        self.completed_at_unix_secs = provider_body.get("completed_at").and_then(Value::as_u64);
        self.expires_at_unix_secs = provider_body.get("expires_at").and_then(Value::as_u64);
        let error = provider_body.get("error").and_then(Value::as_object);
        self.error_code = error
            .and_then(|value| value.get("code"))
            .and_then(Value::as_str)
            .map(str::to_string);
        self.error_message = error
            .and_then(|value| value.get("message"))
            .and_then(Value::as_str)
            .map(str::to_string);
        self.video_url = provider_body
            .get("video_url")
            .or_else(|| provider_body.get("url"))
            .or_else(|| provider_body.get("result_url"))
            .and_then(Value::as_str)
            .map(str::to_string);
    }

    pub fn build_content_stream_action(
        &self,
        query_string: Option<&str>,
        trace_id: &str,
    ) -> Option<LocalVideoTaskContentAction> {
        match self.status {
            LocalVideoTaskStatus::Submitted
            | LocalVideoTaskStatus::Queued
            | LocalVideoTaskStatus::Processing => {
                return Some(LocalVideoTaskContentAction::Immediate {
                    status_code: 202,
                    body_json: json!({
                        "detail": format!(
                            "Video is still processing (status: {})",
                            map_openai_task_status(self.status)
                        )
                    }),
                });
            }
            LocalVideoTaskStatus::Failed | LocalVideoTaskStatus::Expired => {
                return Some(LocalVideoTaskContentAction::Immediate {
                    status_code: 422,
                    body_json: json!({
                        "detail": format!(
                            "Video generation failed: {}",
                            self.error_message
                                .clone()
                                .unwrap_or_else(|| "Unknown error".to_string())
                        )
                    }),
                });
            }
            LocalVideoTaskStatus::Cancelled => {
                return Some(LocalVideoTaskContentAction::Immediate {
                    status_code: 404,
                    body_json: json!({"detail": "Video task was cancelled"}),
                });
            }
            LocalVideoTaskStatus::Deleted => {
                return Some(LocalVideoTaskContentAction::Immediate {
                    status_code: 404,
                    body_json: json!({"detail": "Video task not found"}),
                });
            }
            LocalVideoTaskStatus::Completed => {}
        }

        let variant = parse_video_content_variant(query_string)?;
        let (url, headers) = if variant == "video" {
            if let Some(video_url) = self
                .video_url
                .clone()
                .filter(|value| value.starts_with("http://") || value.starts_with("https://"))
            {
                (video_url, BTreeMap::new())
            } else {
                let mut headers = self.transport.headers.clone();
                headers.remove("content-type");
                headers.remove("content-length");
                (
                    format!(
                        "{}/v1/videos/{}/content",
                        self.transport.upstream_base_url.trim_end_matches('/'),
                        self.upstream_task_id
                    ),
                    headers,
                )
            }
        } else {
            let mut headers = self.transport.headers.clone();
            headers.remove("content-type");
            headers.remove("content-length");
            (
                format!(
                    "{}/v1/videos/{}/content?variant={variant}",
                    self.transport.upstream_base_url.trim_end_matches('/'),
                    self.upstream_task_id
                ),
                headers,
            )
        };

        Some(LocalVideoTaskContentAction::StreamPlan(Box::new(
            ExecutionPlan {
                request_id: trace_id.to_string(),
                candidate_id: None,
                provider_name: self.transport.provider_name.clone(),
                provider_id: self.transport.provider_id.clone(),
                endpoint_id: self.transport.endpoint_id.clone(),
                key_id: self.transport.key_id.clone(),
                method: "GET".to_string(),
                url,
                headers,
                content_type: None,
                content_encoding: None,
                body: RequestBody {
                    json_body: None,
                    body_bytes_b64: None,
                    body_ref: None,
                },
                stream: true,
                client_api_format: "openai:video".to_string(),
                provider_api_format: "openai:video".to_string(),
                model_name: self
                    .model
                    .clone()
                    .or_else(|| self.transport.model_name.clone()),
                proxy: self.transport.proxy.clone(),
                transport_profile: self.transport.transport_profile.clone(),
                timeouts: self.transport.timeouts.clone(),
            },
        )))
    }

    pub fn client_body_json(&self) -> Value {
        let mut body = json!({
            "id": self.local_task_id,
            "object": "video",
            "status": map_openai_task_status(self.status),
            "progress": self.progress_percent,
            "created_at": self.created_at_unix_ms,
        });

        if let Some(model) = &self.model {
            body["model"] = Value::String(model.clone());
        }
        if let Some(prompt) = &self.prompt {
            body["prompt"] = Value::String(prompt.clone());
        }
        if let Some(size) = &self.size {
            body["size"] = Value::String(size.clone());
        }
        if let Some(seconds) = &self.seconds {
            body["seconds"] = Value::String(seconds.clone());
        }
        if let Some(remixed_from_video_id) = &self.remixed_from_video_id {
            body["remixed_from_video_id"] = Value::String(remixed_from_video_id.clone());
        }
        if let Some(completed_at) = self.completed_at_unix_secs {
            body["completed_at"] = Value::Number(completed_at.into());
        }
        if let Some(expires_at) = self.expires_at_unix_secs {
            body["expires_at"] = Value::Number(expires_at.into());
        }
        if self.status == LocalVideoTaskStatus::Failed
            || self.status == LocalVideoTaskStatus::Expired
        {
            body["error"] = json!({
                "code": self.error_code.clone().unwrap_or_else(|| "unknown".to_string()),
                "message": self
                    .error_message
                    .clone()
                    .unwrap_or_else(|| "Video generation failed".to_string()),
            });
        }

        body
    }

    pub fn build_delete_follow_up_plan(
        &self,
        fallback_user_id: Option<&str>,
        fallback_api_key_id: Option<&str>,
        trace_id: &str,
    ) -> Option<LocalVideoTaskFollowUpPlan> {
        if !matches!(
            self.status,
            LocalVideoTaskStatus::Completed | LocalVideoTaskStatus::Failed
        ) {
            return None;
        }
        let (user_id, api_key_id) = resolve_follow_up_auth(
            self.user_id.as_deref(),
            self.api_key_id.as_deref(),
            fallback_user_id,
            fallback_api_key_id,
        )?;
        let model_name = self
            .model
            .clone()
            .or_else(|| self.transport.model_name.clone());

        let mut headers = self.transport.headers.clone();
        headers.remove("content-type");
        headers.remove("content-length");

        Some(LocalVideoTaskFollowUpPlan {
            plan: ExecutionPlan {
                request_id: trace_id.to_string(),
                candidate_id: None,
                provider_name: self.transport.provider_name.clone(),
                provider_id: self.transport.provider_id.clone(),
                endpoint_id: self.transport.endpoint_id.clone(),
                key_id: self.transport.key_id.clone(),
                method: "DELETE".to_string(),
                url: format!(
                    "{}/v1/videos/{}",
                    self.transport.upstream_base_url.trim_end_matches('/'),
                    self.upstream_task_id
                ),
                headers,
                content_type: None,
                content_encoding: None,
                body: RequestBody {
                    json_body: None,
                    body_bytes_b64: None,
                    body_ref: None,
                },
                stream: false,
                client_api_format: "openai:video".to_string(),
                provider_api_format: "openai:video".to_string(),
                model_name: model_name.clone(),
                proxy: self.transport.proxy.clone(),
                transport_profile: self.transport.transport_profile.clone(),
                timeouts: self.transport.timeouts.clone(),
            },
            report_kind: Some("openai_video_delete_sync_finalize".to_string()),
            report_context: Some(build_video_follow_up_report_context(
                VideoFollowUpReportContextInput {
                    request_id: &self.persistence.request_id,
                    user_id: &user_id,
                    api_key_id: &api_key_id,
                    task_id: &self.local_task_id,
                    provider_id: &self.transport.provider_id,
                    endpoint_id: &self.transport.endpoint_id,
                    key_id: &self.transport.key_id,
                    provider_name: self.transport.provider_name.as_deref(),
                    model_name: model_name.as_deref(),
                    client_api_format: "openai:video",
                    provider_api_format: "openai:video",
                },
            )),
        })
    }

    pub fn build_get_follow_up_plan(&self, trace_id: &str) -> Option<ExecutionPlan> {
        if !matches!(
            self.status,
            LocalVideoTaskStatus::Submitted
                | LocalVideoTaskStatus::Queued
                | LocalVideoTaskStatus::Processing
        ) {
            return None;
        }

        let mut headers = self.transport.headers.clone();
        headers.remove("content-type");
        headers.remove("content-length");

        Some(ExecutionPlan {
            request_id: trace_id.to_string(),
            candidate_id: None,
            provider_name: self.transport.provider_name.clone(),
            provider_id: self.transport.provider_id.clone(),
            endpoint_id: self.transport.endpoint_id.clone(),
            key_id: self.transport.key_id.clone(),
            method: "GET".to_string(),
            url: format!(
                "{}/v1/videos/{}",
                self.transport.upstream_base_url.trim_end_matches('/'),
                self.upstream_task_id
            ),
            headers,
            content_type: None,
            content_encoding: None,
            body: RequestBody {
                json_body: None,
                body_bytes_b64: None,
                body_ref: None,
            },
            stream: false,
            client_api_format: "openai:video".to_string(),
            provider_api_format: "openai:video".to_string(),
            model_name: self
                .model
                .clone()
                .or_else(|| self.transport.model_name.clone()),
            proxy: self.transport.proxy.clone(),
            transport_profile: self.transport.transport_profile.clone(),
            timeouts: self.transport.timeouts.clone(),
        })
    }

    pub fn build_cancel_follow_up_plan(
        &self,
        fallback_user_id: Option<&str>,
        fallback_api_key_id: Option<&str>,
        trace_id: &str,
    ) -> Option<LocalVideoTaskFollowUpPlan> {
        if !matches!(
            self.status,
            LocalVideoTaskStatus::Submitted
                | LocalVideoTaskStatus::Queued
                | LocalVideoTaskStatus::Processing
        ) {
            return None;
        }
        let (user_id, api_key_id) = resolve_follow_up_auth(
            self.user_id.as_deref(),
            self.api_key_id.as_deref(),
            fallback_user_id,
            fallback_api_key_id,
        )?;
        let model_name = self
            .model
            .clone()
            .or_else(|| self.transport.model_name.clone());

        let mut headers = self.transport.headers.clone();
        headers.remove("content-type");
        headers.remove("content-length");

        Some(LocalVideoTaskFollowUpPlan {
            plan: ExecutionPlan {
                request_id: trace_id.to_string(),
                candidate_id: None,
                provider_name: self.transport.provider_name.clone(),
                provider_id: self.transport.provider_id.clone(),
                endpoint_id: self.transport.endpoint_id.clone(),
                key_id: self.transport.key_id.clone(),
                method: "DELETE".to_string(),
                url: format!(
                    "{}/v1/videos/{}",
                    self.transport.upstream_base_url.trim_end_matches('/'),
                    self.upstream_task_id
                ),
                headers,
                content_type: None,
                content_encoding: None,
                body: RequestBody {
                    json_body: None,
                    body_bytes_b64: None,
                    body_ref: None,
                },
                stream: false,
                client_api_format: "openai:video".to_string(),
                provider_api_format: "openai:video".to_string(),
                model_name: model_name.clone(),
                proxy: self.transport.proxy.clone(),
                transport_profile: self.transport.transport_profile.clone(),
                timeouts: self.transport.timeouts.clone(),
            },
            report_kind: Some("openai_video_cancel_sync_finalize".to_string()),
            report_context: Some(build_video_follow_up_report_context(
                VideoFollowUpReportContextInput {
                    request_id: &self.persistence.request_id,
                    user_id: &user_id,
                    api_key_id: &api_key_id,
                    task_id: &self.local_task_id,
                    provider_id: &self.transport.provider_id,
                    endpoint_id: &self.transport.endpoint_id,
                    key_id: &self.transport.key_id,
                    provider_name: self.transport.provider_name.as_deref(),
                    model_name: model_name.as_deref(),
                    client_api_format: "openai:video",
                    provider_api_format: "openai:video",
                },
            )),
        })
    }

    pub fn build_remix_follow_up_plan(
        &self,
        body_json: &Value,
        fallback_user_id: Option<&str>,
        fallback_api_key_id: Option<&str>,
        trace_id: &str,
    ) -> Option<LocalVideoTaskFollowUpPlan> {
        if !matches!(self.status, LocalVideoTaskStatus::Completed) || body_json.is_null() {
            return None;
        }
        let (user_id, api_key_id) = resolve_follow_up_auth(
            self.user_id.as_deref(),
            self.api_key_id.as_deref(),
            fallback_user_id,
            fallback_api_key_id,
        )?;
        let model_name = self
            .model
            .clone()
            .or_else(|| self.transport.model_name.clone());

        let mut headers = self.transport.headers.clone();
        headers.remove("content-length");
        let content_type = self
            .transport
            .content_type
            .clone()
            .unwrap_or_else(|| "application/json".to_string());
        headers
            .entry("content-type".to_string())
            .or_insert_with(|| content_type.clone());

        let mut report_context =
            build_video_follow_up_report_context(VideoFollowUpReportContextInput {
                request_id: &self.persistence.request_id,
                user_id: &user_id,
                api_key_id: &api_key_id,
                task_id: &self.local_task_id,
                provider_id: &self.transport.provider_id,
                endpoint_id: &self.transport.endpoint_id,
                key_id: &self.transport.key_id,
                provider_name: self.transport.provider_name.as_deref(),
                model_name: model_name.as_deref(),
                client_api_format: "openai:video",
                provider_api_format: "openai:video",
            });
        if let Some(report_context_object) = report_context.as_object_mut() {
            report_context_object.insert("original_request_body".to_string(), body_json.clone());
        }

        Some(LocalVideoTaskFollowUpPlan {
            plan: ExecutionPlan {
                request_id: trace_id.to_string(),
                candidate_id: None,
                provider_name: self.transport.provider_name.clone(),
                provider_id: self.transport.provider_id.clone(),
                endpoint_id: self.transport.endpoint_id.clone(),
                key_id: self.transport.key_id.clone(),
                method: "POST".to_string(),
                url: format!(
                    "{}/v1/videos/{}/remix",
                    self.transport.upstream_base_url.trim_end_matches('/'),
                    self.upstream_task_id
                ),
                headers,
                content_type: Some(content_type),
                content_encoding: None,
                body: RequestBody::from_json(body_json.clone()),
                stream: false,
                client_api_format: "openai:video".to_string(),
                provider_api_format: "openai:video".to_string(),
                model_name,
                proxy: self.transport.proxy.clone(),
                transport_profile: self.transport.transport_profile.clone(),
                timeouts: self.transport.timeouts.clone(),
            },
            report_kind: Some("openai_video_remix_sync_finalize".to_string()),
            report_context: Some(report_context),
        })
    }

    pub fn to_upsert_record(&self) -> UpsertVideoTask {
        let now_unix_secs = current_unix_timestamp_secs();
        let next_poll_at_unix_secs = match self.status {
            LocalVideoTaskStatus::Submitted
            | LocalVideoTaskStatus::Queued
            | LocalVideoTaskStatus::Processing => Some(
                self.created_at_unix_ms
                    .saturating_add(u64::from(DEFAULT_VIDEO_TASK_POLL_INTERVAL_SECONDS)),
            ),
            _ => None,
        };
        UpsertVideoTask {
            id: self.local_task_id.clone(),
            short_id: None,
            request_id: self.persistence.request_id.clone(),
            user_id: self.user_id.clone(),
            api_key_id: self.api_key_id.clone(),
            username: self.persistence.username.clone(),
            api_key_name: self.persistence.api_key_name.clone(),
            external_task_id: Some(self.upstream_task_id.clone()),
            provider_id: Some(self.transport.provider_id.clone()),
            endpoint_id: Some(self.transport.endpoint_id.clone()),
            key_id: Some(self.transport.key_id.clone()),
            client_api_format: Some(self.persistence.client_api_format.clone()),
            provider_api_format: Some(self.persistence.provider_api_format.clone()),
            format_converted: self.persistence.format_converted,
            model: self.model.clone().or_else(|| Some(String::new())),
            prompt: self.prompt.clone().or_else(|| Some(String::new())),
            original_request_body: Some(self.persistence.original_request_body.clone()),
            duration_seconds: request_body_u32(&self.persistence.original_request_body, "seconds"),
            resolution: request_body_string(&self.persistence.original_request_body, "resolution"),
            aspect_ratio: request_body_string(
                &self.persistence.original_request_body,
                "aspect_ratio",
            ),
            size: self.size.clone(),
            status: self.status.as_database_status(),
            progress_percent: self.progress_percent,
            progress_message: None,
            retry_count: 0,
            poll_interval_seconds: DEFAULT_VIDEO_TASK_POLL_INTERVAL_SECONDS,
            next_poll_at_unix_secs,
            poll_count: 0,
            max_poll_count: DEFAULT_VIDEO_TASK_MAX_POLL_COUNT,
            created_at_unix_ms: self.created_at_unix_ms,
            submitted_at_unix_secs: Some(self.created_at_unix_ms),
            completed_at_unix_secs: self.completed_at_unix_secs,
            updated_at_unix_secs: self.completed_at_unix_secs.unwrap_or(now_unix_secs),
            error_code: self.error_code.clone(),
            error_message: self.error_message.clone(),
            video_url: self.video_url.clone(),
            request_metadata: Some(json!({
                "rust_owner": "async_task",
                "rust_local_snapshot": LocalVideoTaskSnapshot::OpenAi(self.clone()),
            })),
        }
    }
}

#[cfg(test)]
mod tests {
    use aether_data_contracts::repository::video_tasks::{StoredVideoTask, VideoTaskStatus};

    use super::map_openai_stored_task_to_read_response;

    fn sample_stored_task(status: VideoTaskStatus) -> StoredVideoTask {
        StoredVideoTask {
            id: "task-openai-123".to_string(),
            short_id: None,
            request_id: "req-openai-123".to_string(),
            user_id: None,
            api_key_id: None,
            username: None,
            api_key_name: None,
            external_task_id: Some("ext-openai-123".to_string()),
            provider_id: None,
            endpoint_id: None,
            key_id: None,
            client_api_format: Some("openai:video".to_string()),
            provider_api_format: Some("openai:video".to_string()),
            format_converted: false,
            model: Some("sora-2".to_string()),
            prompt: Some("hello".to_string()),
            original_request_body: None,
            duration_seconds: None,
            resolution: None,
            aspect_ratio: None,
            size: Some("1280x720".to_string()),
            status,
            progress_percent: 100,
            progress_message: None,
            retry_count: 0,
            poll_interval_seconds: 10,
            next_poll_at_unix_secs: None,
            poll_count: 0,
            max_poll_count: 360,
            created_at_unix_ms: 1712345678,
            submitted_at_unix_secs: Some(1712345678),
            completed_at_unix_secs: Some(1712345688),
            updated_at_unix_secs: 1712345688,
            error_code: Some("upstream_failed".to_string()),
            error_message: Some("provider failed".to_string()),
            video_url: Some("https://cdn.example.com/video.mp4".to_string()),
            request_metadata: None,
        }
    }

    #[test]
    fn maps_openai_failed_stored_task_into_read_response() {
        let response =
            map_openai_stored_task_to_read_response(sample_stored_task(VideoTaskStatus::Failed));

        assert_eq!(response.status_code, 200);
        assert_eq!(response.body_json["id"], "task-openai-123");
        assert_eq!(response.body_json["status"], "failed");
        assert_eq!(response.body_json["completed_at"], 1712345688u64);
        assert_eq!(response.body_json["error"]["code"], "upstream_failed");
        assert_eq!(
            response.body_json["video_url"],
            "https://cdn.example.com/video.mp4"
        );
    }
}