package admin

import (
    "net/http"
    "strconv"

    "bindbox-game/internal/code"
    "bindbox-game/internal/pkg/core"
    "bindbox-game/internal/pkg/validation"
)

type issueCommitResponse struct {
    AlgoVersion    string `json:"algo_version"`
    IssueID        int64  `json:"issue_id"`
    ServerSeedHash string `json:"server_seed_hash"`
    ItemsRoot      string `json:"items_root"`
    WeightsTotal   int64  `json:"weights_total"`
    StateVersion   int32  `json:"state_version"`
}

// CommitIssueRandom 提交期随机承诺
// @Summary 提交期随机承诺
// @Description 为指定期生成并提交随机承诺（包含主种子哈希、奖项根、总权重）
// @Tags 管理端.活动
// @Accept json
// @Produce json
// @Param activity_id path integer true "活动ID"
// @Param issue_id path integer true "期ID"
// @Success 200 {object} issueCommitResponse
// @Failure 400 {object} code.Failure
// @Security LoginVerifyToken
// @Router /api/admin/activities/{activity_id}/issues/{issue_id}/commit_random [post]
func (h *handler) CommitIssueRandom() core.HandlerFunc {
    return func(ctx core.Context) {
        issueIDStr := ctx.Param("issue_id")
        if issueIDStr == "" {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
            return
        }
        if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
            return
        }
        issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
        cm, err := h.activity.CommitIssueRandom(ctx.RequestContext(), issueID)
        if err != nil {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.CommitIssueRandomError, err.Error()))
            return
        }
        ctx.Payload(&issueCommitResponse{
            AlgoVersion:    cm.AlgoVersion,
            IssueID:        cm.IssueID,
            ServerSeedHash: hexStr(cm.ServerSeedHash[:]),
            ItemsRoot:      hexStr(cm.ItemsRoot[:]),
            WeightsTotal:   cm.WeightsTotal,
        })
    }
}

// GetIssueRandomCommit 获取期随机承诺
// @Summary 获取期随机承诺
// @Description 查询指定期当前有效的随机承诺详情
// @Tags 管理端.活动
// @Accept json
// @Produce json
// @Param activity_id path integer true "活动ID"
// @Param issue_id path integer true "期ID"
// @Success 200 {object} issueCommitResponse
// @Failure 400 {object} code.Failure
// @Security LoginVerifyToken
// @Router /api/admin/activities/{activity_id}/issues/{issue_id}/commit_random [get]
func (h *handler) GetIssueRandomCommit() core.HandlerFunc {
    return func(ctx core.Context) {
        issueIDStr := ctx.Param("issue_id")
        if issueIDStr == "" {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
            return
        }
        if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
            return
        }
        issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
        cm, err := h.activity.GetIssueRandomCommit(ctx.RequestContext(), issueID)
        if err != nil {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, err.Error()))
            return
        }
        if cm == nil {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, "未找到承诺"))
            return
        }
        ctx.Payload(&issueCommitResponse{
            AlgoVersion:    cm.AlgoVersion,
            IssueID:        cm.IssueID,
            ServerSeedHash: hexStr(cm.ServerSeedHash[:]),
            ItemsRoot:      hexStr(cm.ItemsRoot[:]),
            WeightsTotal:   cm.WeightsTotal,
            StateVersion:   cm.StateVersion,
        })
    }
}

// GetIssueRandomCommitHistory 获取期随机承诺历史
// @Summary 获取期随机承诺历史
// @Description 查询指定期的历史承诺记录列表（包含版本与哈希）
// @Tags 管理端.活动
// @Accept json
// @Produce json
// @Param activity_id path integer true "活动ID"
// @Param issue_id path integer true "期ID"
// @Success 200 {array} issueCommitResponse
// @Failure 400 {object} code.Failure
// @Security LoginVerifyToken
// @Router /api/admin/activities/{activity_id}/issues/{issue_id}/commit_random/history [get]
func (h *handler) GetIssueRandomCommitHistory() core.HandlerFunc {
    return func(ctx core.Context) {
        issueIDStr := ctx.Param("issue_id")
        if issueIDStr == "" {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
            return
        }
        if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
            return
        }
        issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
        history, err := h.activity.GetIssueRandomCommitHistory(ctx.RequestContext(), issueID)
        if err != nil {
            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, err.Error()))
            return
        }
        
        // 转换响应格式
        response := make([]*issueCommitResponse, 0, len(history))
        for _, commit := range history {
            response = append(response, &issueCommitResponse{
                AlgoVersion:    commit.AlgoVersion,
                IssueID:        commit.IssueID,
                ServerSeedHash: hexStr(commit.ServerSeedHash[:]),
                ItemsRoot:      hexStr(commit.ItemsRoot[:]),
                WeightsTotal:   commit.WeightsTotal,
                StateVersion:   commit.StateVersion,
            })
        }
        ctx.Payload(response)
    }
}

func hexStr(b []byte) string {
    const hextable = "0123456789abcdef"
    dst := make([]byte, len(b)*2)
    j := 0
    for _, v := range b {
        dst[j] = hextable[v>>4]
        dst[j+1] = hextable[v&0x0f]
        j += 2
    }
    return string(dst)
}