use std::{
    collections::BTreeMap,
    error::Error as StdError,
    time::{Duration, Instant, SystemTime, UNIX_EPOCH},
};

use axum::{
    Json,
    extract::{Extension, Path as AxumPath, State, rejection::JsonRejection},
    http::{HeaderName, StatusCode, header},
    response::{
        IntoResponse, Response,
        sse::{Event, Sse},
    },
};
use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64_STANDARD};
use image::ImageFormat;
use module_assets::{
    AssetObjectAccessPolicy, AssetObjectFieldError, build_asset_entity_binding_input,
    build_asset_object_upsert_input, generate_asset_binding_id, generate_asset_object_id,
};
use module_puzzle::{PuzzleGeneratedImageCandidate, PuzzleRuntimeLevelStatus};
use platform_llm::{LlmMessage, LlmMessageContentPart, LlmTextRequest};
use platform_oss::{
    LegacyAssetPrefix, OssHeadObjectRequest, OssObjectAccess, OssPutObjectRequest,
    OssSignedGetObjectUrlRequest,
};
use serde_json::{Map, Value, json};
use shared_contracts::{
    creation_audio::CreationAudioAsset,
    puzzle_agent::{
        CreatePuzzleAgentSessionRequest, ExecutePuzzleAgentActionRequest,
        PuzzleAgentActionResponse, PuzzleAgentMessageResponse, PuzzleAgentOperationResponse,
        PuzzleAgentSessionResponse, PuzzleAgentSessionSnapshotResponse,
        PuzzleAgentSuggestedActionResponse, PuzzleAnchorItemResponse, PuzzleAnchorPackResponse,
        PuzzleCreatorIntentResponse, PuzzleDraftLevelResponse, PuzzleFormDraftResponse,
        PuzzleGeneratedImageCandidateResponse, PuzzleResultDraftResponse,
        PuzzleResultPreviewBlockerResponse, PuzzleResultPreviewEnvelopeResponse,
        PuzzleResultPreviewFindingResponse, SendPuzzleAgentMessageRequest,
    },
    puzzle_gallery::PuzzleGalleryDetailResponse,
    puzzle_runtime::{
        AdvancePuzzleNextLevelRequest, DragPuzzlePieceRequest, PuzzleBoardSnapshotResponse,
        PuzzleCellPositionResponse, PuzzleLeaderboardEntryResponse, PuzzleMergedGroupStateResponse,
        PuzzlePieceStateResponse, PuzzleRecommendedNextWorkResponse, PuzzleRunResponse,
        PuzzleRunSnapshotResponse, PuzzleRuntimeLevelSnapshotResponse, StartPuzzleRunRequest,
        SubmitPuzzleLeaderboardRequest, SwapPuzzlePiecesRequest, UpdatePuzzleRuntimePauseRequest,
        UsePuzzleRuntimePropRequest,
    },
    puzzle_works::{
        PutPuzzleWorkRequest, PuzzleOnboardingGenerateRequest, PuzzleOnboardingGenerateResponse,
        PuzzleOnboardingSaveRequest, PuzzleWorkDetailResponse, PuzzleWorkMutationResponse,
        PuzzleWorkProfileResponse, PuzzleWorkSummaryResponse, PuzzleWorksResponse,
    },
};
use shared_kernel::{build_prefixed_uuid_id, format_timestamp_micros};
use spacetime_client::{
    PuzzleAgentMessageRecord, PuzzleAgentMessageSubmitRecordInput,
    PuzzleAgentSessionCreateRecordInput, PuzzleAgentSessionRecord,
    PuzzleAgentSuggestedActionRecord, PuzzleAnchorItemRecord, PuzzleAnchorPackRecord,
    PuzzleAudioAssetRecord, PuzzleCreatorIntentRecord, PuzzleDraftLevelRecord,
    PuzzleFormDraftRecord, PuzzleFormDraftSaveRecordInput, PuzzleGalleryCardRecord,
    PuzzleGeneratedImageCandidateRecord, PuzzleGeneratedImagesSaveRecordInput,
    PuzzleLeaderboardEntryRecord, PuzzleLeaderboardSubmitRecordInput, PuzzlePublishRecordInput,
    PuzzleRecommendedNextWorkRecord, PuzzleResultDraftRecord, PuzzleResultPreviewBlockerRecord,
    PuzzleResultPreviewFindingRecord, PuzzleResultPreviewRecord, PuzzleRunDragRecordInput,
    PuzzleRunPauseRecordInput, PuzzleRunPropRecordInput, PuzzleRunRecord,
    PuzzleRunStartRecordInput, PuzzleRunSwapRecordInput, PuzzleSelectCoverImageRecordInput,
    PuzzleUiBackgroundSaveRecordInput, PuzzleWorkLikeReportRecordInput,
    PuzzleWorkPointIncentiveClaimRecordInput, PuzzleWorkProfileRecord, PuzzleWorkRemixRecordInput,
    PuzzleWorkUpsertRecordInput, SpacetimeClientError,
};
use std::convert::Infallible;

use crate::{
    ai_generation_drafts::{AiGenerationDraftContext, AiGenerationDraftWriter},
    api_response::json_success_body,
    asset_billing::{
        execute_billable_asset_operation, execute_billable_asset_operation_with_cost,
        should_skip_asset_operation_billing_for_connectivity,
    },
    auth::AuthenticatedAccessToken,
    http_error::AppError,
    llm_model_routing::{CREATION_TEMPLATE_LLM_MODEL, PUZZLE_LEVEL_NAME_VISION_LLM_MODEL},
    openai_image_generation::{
        DownloadedOpenAiImage, VECTOR_ENGINE_GPT_IMAGE_2_MODEL, build_openai_image_http_client,
        create_openai_image_generation, require_openai_image_settings,
    },
    platform_errors::map_oss_error,
    prompt::puzzle::{
        draft::{
            PuzzleFormSeedPromptParts, build_puzzle_form_seed_prompt,
            resolve_puzzle_draft_cover_prompt, resolve_puzzle_level_image_prompt,
        },
        image::{PUZZLE_DEFAULT_NEGATIVE_PROMPT, build_puzzle_image_prompt},
        level_name::{
            PUZZLE_FIRST_LEVEL_NAME_SYSTEM_PROMPT, build_puzzle_first_level_name_user_prompt,
            build_puzzle_first_level_name_vision_user_text,
        },
        tags::{PUZZLE_TAG_GENERATION_SYSTEM_PROMPT, build_puzzle_tag_generation_user_prompt},
    },
    puzzle_agent_turn::{
        PuzzleAgentTurnRequest, build_failed_finalize_record_input, build_finalize_record_input,
        run_puzzle_agent_turn,
    },
    puzzle_gallery_cache::{build_puzzle_gallery_window_response, puzzle_gallery_cached_json},
    request_context::RequestContext,
    state::AppState,
    vector_engine_audio_generation::{
        GeneratedCreationAudioTarget, generate_background_music_asset_for_creation,
    },
    work_author::resolve_work_author_by_user_id,
    work_play_tracking::{WorkPlayTrackingDraft, record_work_play_start_after_success},
};

const PUZZLE_AGENT_API_BASE_PROVIDER: &str = "puzzle-agent";
const PUZZLE_WORKS_PROVIDER: &str = "puzzle-works";
const PUZZLE_GALLERY_PROVIDER: &str = "puzzle-gallery";
const PUZZLE_RUNTIME_PROVIDER: &str = "puzzle-runtime";
const PUZZLE_IMAGE_MODEL_GPT_IMAGE_2: &str = "gpt-image-2";
const PUZZLE_IMAGE_MODEL_GEMINI_31_FLASH_PREVIEW: &str = "gemini-3.1-flash-image-preview";
const PUZZLE_IMAGE_GENERATION_POINTS_COST: u64 = 2;
const PUZZLE_ENTITY_KIND: &str = "puzzle_work";
const PUZZLE_BACKGROUND_MUSIC_ASSET_KIND: &str = "puzzle_background_music";
const PUZZLE_BACKGROUND_MUSIC_SLOT: &str = "background_music";
#[cfg(test)]
const PUZZLE_GENERATED_IMAGE_SIZE: &str = "1024*1024";
const PUZZLE_VECTOR_ENGINE_GENERATED_IMAGE_SIZE: &str = "1024x1024";
const VECTOR_ENGINE_PROVIDER: &str = "vector-engine";
const PUZZLE_LEVEL_NAME_VISION_IMAGE_MAX_SIDE: u32 = 768;
const PUZZLE_LEVEL_NAME_VISION_MAX_TOKENS: u32 = 512;
const PUZZLE_REFERENCE_IMAGE_MAX_BYTES: usize = 8 * 1024 * 1024;
const PUZZLE_REFERENCE_IMAGE_SOURCE_LIMIT: usize = 5;
const PUZZLE_VECTOR_ENGINE_IMAGE_EDIT_MODEL: &str = "gpt-image-2";
const PUZZLE_UI_BACKGROUND_PROMPT_FALLBACK_MARKER: &str =
    "移动端拼图游戏纯背景，题材氛围清晰，不包含拼图槽或 UI 元素";
mod handlers;
pub(crate) use self::handlers::*;

mod mappers;

use self::mappers::*;

mod draft;
use self::draft::*;

mod tags;

use self::tags::*;

mod generation;
mod vector_engine;

use self::generation::*;
use self::vector_engine::*;

#[cfg(test)]
mod tests;